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DbProviderFactory — провайдер-незалежний код","/csharp/ado-net/provider-factory","01.csharp/09.ado-net/07.provider-factory",{"title":438,"path":439,"stem":440},"9.8. Асинхронний доступ до даних","/csharp/ado-net/async-data-access","01.csharp/09.ado-net/08.async-data-access",{"title":442,"path":443,"stem":444},"9.9. Від'єднаний режим: DataSet, DataTable, DataRow","/csharp/ado-net/disconnected-mode-dataset","01.csharp/09.ado-net/09.disconnected-mode-dataset",{"title":446,"path":447,"stem":448},"9.10. DataAdapter — міст між DataSet та базою даних","/csharp/ado-net/data-adapter","01.csharp/09.ado-net/10.data-adapter",{"title":450,"path":451,"stem":452},"9.11. Data Mapper та Repository: Архітектура доступу до даних","/csharp/ado-net/data-mapper-repository","01.csharp/09.ado-net/11.data-mapper-repository",{"title":454,"path":455,"stem":456},"9.12. Identity Map, Unit of Work та Specification Pattern","/csharp/ado-net/advanced-patterns","01.csharp/09.ado-net/12.advanced-patterns",{"title":458,"icon":255,"path":459,"stem":460,"children":461,"page":59},"Ef Core","/csharp/ef-core","01.csharp/10.ef-core",[462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,532,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,646],{"title":463,"path":464,"stem":465},"Що таке ORM? Від SQL до об'єктів","/csharp/ef-core/what-is-orm","01.csharp/10.ef-core/01.what-is-orm",{"title":467,"path":468,"stem":469},"Перший проєкт — від нуля до CRUD","/csharp/ef-core/first-project","01.csharp/10.ef-core/02.first-project",{"title":471,"path":472,"stem":473},"DbContext — Серце EF Core","/csharp/ef-core/dbcontext-deep-dive","01.csharp/10.ef-core/03.dbcontext-deep-dive",{"title":475,"path":476,"stem":477},"Провайдери баз даних — Архітектура та Вибір СУБД","/csharp/ef-core/database-providers","01.csharp/10.ef-core/04.database-providers",{"title":479,"path":480,"stem":481},"Конвенції EF Core — Магія без конфігурації","/csharp/ef-core/conventions","01.csharp/10.ef-core/05.conventions",{"title":483,"path":484,"stem":485},"Fluent API та Data Annotations — Явна конфігурація моделі","/csharp/ef-core/fluent-api-vs-annotations","01.csharp/10.ef-core/06.fluent-api-vs-annotations",{"title":487,"path":488,"stem":489},"Зв'язки — One-to-One та One-to-Many","/csharp/ef-core/relationships-basics","01.csharp/10.ef-core/07.relationships-basics",{"title":491,"path":492,"stem":493},"Зв'язки Advanced — Many-to-Many та Складні Сценарії","/csharp/ef-core/relationships-advanced","01.csharp/10.ef-core/08.relationships-advanced",{"title":495,"path":496,"stem":497},"Властивості — Типи, Конвертери, Компаратори (Частина 1)","/csharp/ef-core/property-configuration-part1","01.csharp/10.ef-core/09.property-configuration-part1",{"title":499,"path":500,"stem":501},"Властивості — Value Comparers, Generators, Shadow Properties (Частина 2)","/csharp/ef-core/property-configuration-part2","01.csharp/10.ef-core/09.property-configuration-part2",{"title":503,"path":504,"stem":505},"Складні типи — Owned Types та Complex Types (Частина 1)","/csharp/ef-core/complex-types-owned-part1","01.csharp/10.ef-core/10.complex-types-owned-part1",{"title":507,"path":508,"stem":509},"Складні типи — Complex Types, Keyless Entities, Порівняння (Частина 2)","/csharp/ef-core/complex-types-owned-part2","01.csharp/10.ef-core/10.complex-types-owned-part2",{"title":511,"path":512,"stem":513},"JSON Columns — Складні дані у JSON (Частина 1)","/csharp/ef-core/json-columns-part1","01.csharp/10.ef-core/11.json-columns-part1",{"title":515,"path":516,"stem":517},"JSON Columns — Value Comparers, Індекси, Провайдери (Частина 2)","/csharp/ef-core/json-columns-part2","01.csharp/10.ef-core/11.json-columns-part2",{"title":519,"path":520,"stem":521},"Успадкування — Абстрактні класи та TPH (Частина 1)","/csharp/ef-core/inheritance-part1","01.csharp/10.ef-core/12.inheritance-part1",{"title":523,"path":524,"stem":525},"Успадкування — TPT, TPC та Порівняння Стратегій (Частина 2)","/csharp/ef-core/inheritance-part2","01.csharp/10.ef-core/12.inheritance-part2",{"title":527,"path":528,"stem":529,"children":530},"Індекси, Обмеження та Схема (Частина 1)","/csharp/ef-core/indexes-constraints-part1","01.csharp/10.ef-core/13.indexes-constraints-part1",[531],{"title":527,"path":528,"stem":529},{"title":533,"path":534,"stem":535,"children":536},"Індекси, Обмеження та Схема (Частина 2)","/csharp/ef-core/indexes-constraints-part2","01.csharp/10.ef-core/13.indexes-constraints-part2",[537],{"title":533,"path":534,"stem":535},{"title":539,"path":540,"stem":541},"Seed Data — Початкові Дані (Частина 1)","/csharp/ef-core/seeding-part1","01.csharp/10.ef-core/14.seeding-part1",{"title":543,"path":544,"stem":545},"Seed Data — SQL-скрипти, Bogus та Стратегії (Частина 2)","/csharp/ef-core/seeding-part2","01.csharp/10.ef-core/14.seeding-part2",{"title":547,"path":548,"stem":549},"Global Query Filters — Глобальні Фільтри (Частина 1)","/csharp/ef-core/global-query-filters-part1","01.csharp/10.ef-core/15.global-query-filters-part1",{"title":551,"path":552,"stem":553},"Global Query Filters — Підводні камені та Інтеграція (Частина 2)","/csharp/ef-core/global-query-filters-part2","01.csharp/10.ef-core/15.global-query-filters-part2",{"title":555,"path":556,"stem":557},"LINQ-запити в EF Core (Частина 1)","/csharp/ef-core/linq-queries-part1","01.csharp/10.ef-core/16.linq-queries-part1",{"title":559,"path":560,"stem":561},"LINQ-запити в EF Core (Частина 2)","/csharp/ef-core/linq-queries-part2","01.csharp/10.ef-core/16.linq-queries-part2",{"title":563,"path":564,"stem":565},"Завантаження Пов'язаних Даних (Частина 1)","/csharp/ef-core/loading-related-data-part1","01.csharp/10.ef-core/17.loading-related-data-part1",{"title":567,"path":568,"stem":569},"Завантаження Пов'язаних Даних (Частина 2)","/csharp/ef-core/loading-related-data-part2","01.csharp/10.ef-core/17.loading-related-data-part2",{"title":571,"path":572,"stem":573},"Raw SQL, Views та Stored Procedures (Частина 1)","/csharp/ef-core/raw-sql-part1","01.csharp/10.ef-core/18.raw-sql-part1",{"title":575,"path":576,"stem":577},"Raw SQL — Stored Procedures, DbFunction та Bulk Operations (Частина 2)","/csharp/ef-core/raw-sql-part2","01.csharp/10.ef-core/18.raw-sql-part2",{"title":579,"path":580,"stem":581},"Продвинуті Запити — Compiled Queries, Bulk та Оптимізація (Частина 1)","/csharp/ef-core/advanced-queries-part1","01.csharp/10.ef-core/19.advanced-queries-part1",{"title":583,"path":584,"stem":585},"Продвинуті Запити — Query Tags, Bulk та Interceptors (Частина 2)","/csharp/ef-core/advanced-queries-part2","01.csharp/10.ef-core/19.advanced-queries-part2",{"title":587,"path":588,"stem":589},"Change Tracker — Відстеження Змін (Частина 1)","/csharp/ef-core/change-tracking-part1","01.csharp/10.ef-core/20.change-tracking-part1",{"title":591,"path":592,"stem":593},"Change Tracker — Графи Об'єктів та Disconnected (Частина 2)","/csharp/ef-core/change-tracking-part2","01.csharp/10.ef-core/20.change-tracking-part2",{"title":595,"path":596,"stem":597},"Збереження Даних та Транзакції (Частина 1)","/csharp/ef-core/saving-data-part1","01.csharp/10.ef-core/21.saving-data-part1",{"title":599,"path":600,"stem":601},"Збереження Даних — Concurrency та Outbox (Частина 2)","/csharp/ef-core/saving-data-part2","01.csharp/10.ef-core/21.saving-data-part2",{"title":603,"path":604,"stem":605},"Конкурентність та Блокування (Частина 1)","/csharp/ef-core/concurrency-part1","01.csharp/10.ef-core/22.concurrency-part1",{"title":607,"path":608,"stem":609},"Конкурентність — Дедлоки та Queue Processing (Частина 2)","/csharp/ef-core/concurrency-part2","01.csharp/10.ef-core/22.concurrency-part2",{"title":611,"path":612,"stem":613},"Міграції в EF Core — Основи (Частина 1)","/csharp/ef-core/migrations-basics-part1","01.csharp/10.ef-core/23.migrations-basics-part1",{"title":615,"path":616,"stem":617},"Міграції в EF Core — Основи (Частина 2)","/csharp/ef-core/migrations-basics-part2","01.csharp/10.ef-core/23.migrations-basics-part2",{"title":619,"path":620,"stem":621},"Міграції — Просунуті Сценарії (Частина 1)","/csharp/ef-core/migrations-advanced-part1","01.csharp/10.ef-core/24.migrations-advanced-part1",{"title":623,"path":624,"stem":625},"Міграції — Просунуті Сценарії (Частина 2)","/csharp/ef-core/migrations-advanced-part2","01.csharp/10.ef-core/24.migrations-advanced-part2",{"title":627,"path":628,"stem":629},"Управління Схемою та Database-First (Частина 1)","/csharp/ef-core/schema-management-part1","01.csharp/10.ef-core/25.schema-management-part1",{"title":631,"path":632,"stem":633},"Управління Схемою та Database-First (Частина 2)","/csharp/ef-core/schema-management-part2","01.csharp/10.ef-core/25.schema-management-part2",{"title":635,"path":636,"stem":637},"Продуктивність EF Core — Основи (Частина 1)","/csharp/ef-core/performance-fundamentals-part1","01.csharp/10.ef-core/26.performance-fundamentals-part1",{"title":639,"path":640,"stem":641},"Interceptors в EF Core (Частина 1)","/csharp/ef-core/interceptors-part1","01.csharp/10.ef-core/29.interceptors-part1",{"title":643,"path":644,"stem":645},"Interceptors в EF Core — Connection, Transaction та Materialization (Частина 2)","/csharp/ef-core/interceptors-part2","01.csharp/10.ef-core/29.interceptors-part2",{"title":647,"path":648,"stem":649},"План вивчення Entity Framework Core — Повний курс","/csharp/ef-core/implementation_plan","01.csharp/10.ef-core/implementation_plan",{"title":651,"icon":652,"path":653,"stem":654,"children":655,"page":59},"ASP.NET","i-devicon-dotnetcore","/csharp/aspnet","01.csharp/11.aspnet",[656,730,791,869,927,941,967,1057,1111,1182,1212,1289],{"title":657,"icon":658,"path":659,"stem":660,"children":661,"page":59},"Minimal API","i-lucide-network","/csharp/aspnet/minimal-api","01.csharp/11.aspnet/01.minimal-api",[662,666,670,674,678,682,686,690,694,698,702,706,710,714,718,722,726],{"title":663,"path":664,"stem":665},"Вступ до ASP.NET та еволюція фреймворку","/csharp/aspnet/minimal-api/introduction","01.csharp/11.aspnet/01.minimal-api/01.introduction",{"title":667,"path":668,"stem":669},"Перший додаток на ASP.NET Core","/csharp/aspnet/minimal-api/first-application","01.csharp/11.aspnet/01.minimal-api/02.first-application",{"title":671,"path":672,"stem":673},"WebApplication, Builder та Dependency Injection","/csharp/aspnet/minimal-api/webapplication-builder","01.csharp/11.aspnet/01.minimal-api/03.webapplication-builder",{"title":675,"path":676,"stem":677},"Конвеєр запитів та Middleware","/csharp/aspnet/minimal-api/request-pipeline-middleware","01.csharp/11.aspnet/01.minimal-api/04.request-pipeline-middleware",{"title":679,"path":680,"stem":681},"Маршрутизація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/routing-basics","01.csharp/11.aspnet/01.minimal-api/05.routing-basics",{"title":683,"path":684,"stem":685},"Маршрутизація в ASP.NET Core: Розширені можливості","/csharp/aspnet/minimal-api/routing-advanced","01.csharp/11.aspnet/01.minimal-api/06.routing-advanced",{"title":687,"path":688,"stem":689},"Статичні файли в ASP.NET Core","/csharp/aspnet/minimal-api/static-files","01.csharp/11.aspnet/01.minimal-api/07.static-files",{"title":691,"path":692,"stem":693},"Статичні Активи: MapStaticAssets (ASP.NET Core 9.0)","/csharp/aspnet/minimal-api/static-assets","01.csharp/11.aspnet/01.minimal-api/08.static-assets",{"title":695,"path":696,"stem":697},"Конфігурація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/configuration-fundamentals","01.csharp/11.aspnet/01.minimal-api/09.configuration-fundamentals",{"title":699,"path":700,"stem":701},"Конфігурація: Паттерн Options","/csharp/aspnet/minimal-api/configuration-options","01.csharp/11.aspnet/01.minimal-api/10.configuration-options",{"title":703,"path":704,"stem":705},"Логування в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/logging-basics","01.csharp/11.aspnet/01.minimal-api/11.logging-basics",{"title":707,"path":708,"stem":709},"Логування: Serilog та Middleware","/csharp/aspnet/minimal-api/logging-advanced","01.csharp/11.aspnet/01.minimal-api/12.logging-advanced",{"title":711,"path":712,"stem":713},"Управління станом: HttpContext.Items та Cookies","/csharp/aspnet/minimal-api/state-management","01.csharp/11.aspnet/01.minimal-api/13.state-management",{"title":715,"path":716,"stem":717},"Стан сесії: Sessions","/csharp/aspnet/minimal-api/session-state","01.csharp/11.aspnet/01.minimal-api/14.session-state",{"title":719,"path":720,"stem":721},"Структура проєкту: від хаосу до архітектури","/csharp/aspnet/minimal-api/project-structure","01.csharp/11.aspnet/01.minimal-api/15.project-structure",{"title":723,"path":724,"stem":725},"Scalar у Minimal API: повний проєкт і Fluent OpenAPI","/csharp/aspnet/minimal-api/scalar-openapi-fluent","01.csharp/11.aspnet/01.minimal-api/16.scalar-openapi-fluent",{"title":727,"path":728,"stem":729},"Swagger / Swashbuckle у Minimal API: окремий класичний шлях","/csharp/aspnet/minimal-api/swagger-swashbuckle","01.csharp/11.aspnet/01.minimal-api/17.swagger-swashbuckle",{"title":731,"icon":658,"path":732,"stem":733,"children":734,"page":59},"API","/csharp/aspnet/api","01.csharp/11.aspnet/02.api",[735,739,743,747,751,755,759,763,767,771,775,779,783,787],{"title":736,"path":737,"stem":738},"Що таке API. Клієнт-серверна архітектура","/csharp/aspnet/api/what-is-api","01.csharp/11.aspnet/02.api/01.what-is-api",{"title":740,"path":741,"stem":742},"Формати даних: JSON, XML, TOML та бінарні формати","/csharp/aspnet/api/data-formats","01.csharp/11.aspnet/02.api/02.data-formats",{"title":744,"path":745,"stem":746},"Парадигми API та концепція REST","/csharp/aspnet/api/api-paradigms-rest","01.csharp/11.aspnet/02.api/03.api-paradigms-rest",{"title":748,"path":749,"stem":750},"HTTP-методи, статус-коди та заголовки","/csharp/aspnet/api/http-methods-status-codes","01.csharp/11.aspnet/02.api/04.http-methods-status-codes",{"title":752,"path":753,"stem":754},"Організація HTTP API за принципами REST","/csharp/aspnet/api/rest-organizing","01.csharp/11.aspnet/02.api/05.rest-organizing",{"title":756,"path":757,"stem":758},"Номенклатура URL та CRUD-операції","/csharp/aspnet/api/url-nomenclature-crud","01.csharp/11.aspnet/02.api/06.url-nomenclature-crud",{"title":760,"path":761,"stem":762},"Правила дизайну: іменування та стандарти","/csharp/aspnet/api/api-design-naming","01.csharp/11.aspnet/02.api/07.api-design-naming",{"title":764,"path":765,"stem":766},"Валідація, ліміти та обробка помилок","/csharp/aspnet/api/api-design-validation","01.csharp/11.aspnet/02.api/08.api-design-validation",{"title":768,"path":769,"stem":770},"Обробка помилок у Minimal API","/csharp/aspnet/api/error-handling-http","01.csharp/11.aspnet/02.api/09.error-handling-http",{"title":772,"path":773,"stem":774},"Ідемпотентність та синхронізація стану","/csharp/aspnet/api/idempotency-sync","01.csharp/11.aspnet/02.api/10.idempotency-sync",{"title":776,"path":777,"stem":778},"Пагінація та організація списків","/csharp/aspnet/api/pagination-lists","01.csharp/11.aspnet/02.api/11.pagination-lists",{"title":780,"path":781,"stem":782},"Безпека API, кешування та інтернаціоналізація","/csharp/aspnet/api/security-auth","01.csharp/11.aspnet/02.api/12.security-auth",{"title":784,"path":785,"stem":786},"Процес проєктування API та документування","/csharp/aspnet/api/api-design-process","01.csharp/11.aspnet/02.api/13.api-design-process",{"title":788,"path":789,"stem":790},"OpenAPI: контракт, специфікація та документація API","/csharp/aspnet/api/openapi","01.csharp/11.aspnet/02.api/14.openapi",{"title":792,"icon":793,"path":794,"stem":795,"children":796,"page":59},"Auth","i-lucide-shield-check","/csharp/aspnet/auth","01.csharp/11.aspnet/03.auth",[797,801,805,809,813,817,821,825,829,833,837,841,845,849,853,857,861,865],{"title":798,"path":799,"stem":800},"Основи аутентифікації та авторизації","/csharp/aspnet/auth/auth-fundamentals","01.csharp/11.aspnet/03.auth/01.auth-fundamentals",{"title":802,"path":803,"stem":804},"JWT-аутентифікація","/csharp/aspnet/auth/jwt-authentication","01.csharp/11.aspnet/03.auth/02.jwt-authentication",{"title":806,"path":807,"stem":808},"Авторизація: ролі, політики та resource-based доступ","/csharp/aspnet/auth/authorization-policies","01.csharp/11.aspnet/03.auth/03.authorization-policies",{"title":810,"path":811,"stem":812},"Cookie-аутентифікація та ASP.NET Core Identity","/csharp/aspnet/auth/cookie-auth-identity","01.csharp/11.aspnet/03.auth/04.cookie-auth-identity",{"title":814,"path":815,"stem":816},"JWT + Refresh Tokens (HttpOnly Cookie)","/csharp/aspnet/auth/04b.identity-auth-jwt","01.csharp/11.aspnet/03.auth/04b.identity-auth-jwt",{"title":818,"path":819,"stem":820},"Identity: Підтвердження Email та Скидання Пароля","/csharp/aspnet/auth/identity-email-confirmation","01.csharp/11.aspnet/03.auth/05.identity-email-confirmation",{"title":822,"path":823,"stem":824},"Identity: Двофакторна Аутентифікація (2FA)","/csharp/aspnet/auth/identity-two-factor","01.csharp/11.aspnet/03.auth/06.identity-two-factor",{"title":826,"path":827,"stem":828},"Identity: Внутрішня Архітектура та Кастомізація","/csharp/aspnet/auth/identity-internals","01.csharp/11.aspnet/03.auth/07.identity-internals",{"title":830,"path":831,"stem":832},"OAuth 2.0 та зовнішні провайдери","/csharp/aspnet/auth/oauth-external-providers","01.csharp/11.aspnet/03.auth/08.oauth-external-providers",{"title":834,"path":835,"stem":836},"Безпека на практиці: CORS, HTTPS та захист від атак","/csharp/aspnet/auth/security-hardening","01.csharp/11.aspnet/03.auth/09.security-hardening",{"title":838,"path":839,"stem":840},"Теорія OAuth 2.0: Поняття, Аналогії та Флоу","/csharp/aspnet/auth/oauth-theory","01.csharp/11.aspnet/03.auth/10.oauth-theory",{"title":842,"path":843,"stem":844},"OIDC, OAuth 2.0 та Keycloak в ASP.NET Core","/csharp/aspnet/auth/oidc-keycloak","01.csharp/11.aspnet/03.auth/10.oidc-keycloak",{"title":846,"path":847,"stem":848},"API Keys аутентифікація в ASP.NET Core","/csharp/aspnet/auth/api-keys","01.csharp/11.aspnet/03.auth/11.api-keys",{"title":850,"path":851,"stem":852},"Rate Limiting та Throttling в ASP.NET Core","/csharp/aspnet/auth/rate-limiting","01.csharp/11.aspnet/03.auth/12.rate-limiting",{"title":854,"path":855,"stem":856},"Refresh Token Rotation в ASP.NET Core","/csharp/aspnet/auth/refresh-token-rotation","01.csharp/11.aspnet/03.auth/13.refresh-token-rotation",{"title":858,"path":859,"stem":860},"Certificate Authentication та mTLS в ASP.NET Core","/csharp/aspnet/auth/certificate-auth","01.csharp/11.aspnet/03.auth/14.certificate-auth",{"title":862,"path":863,"stem":864},"RBAC, ABAC та ReBAC в ASP.NET Core","/csharp/aspnet/auth/rbac-abac-rebac","01.csharp/11.aspnet/03.auth/15.rbac-abac-rebac",{"title":866,"path":867,"stem":868},"Multi-tenancy та ізоляція даних в ASP.NET Core","/csharp/aspnet/auth/multi-tenancy","01.csharp/11.aspnet/03.auth/16.multi-tenancy",{"title":870,"icon":871,"path":872,"stem":873,"children":874,"page":59},"Нотифікації","i-lucide-bell","/csharp/aspnet/notifications","01.csharp/11.aspnet/04.notifications",[875,879,883,887,891,895,899,903,907,911,915,919,923],{"title":876,"path":877,"stem":878},"In-App нотифікації через базу даних","/csharp/aspnet/notifications/in-app-database-notifications","01.csharp/11.aspnet/04.notifications/01.in-app-database-notifications",{"title":880,"path":881,"stem":882},"Polling: Регулярний запит оновлень","/csharp/aspnet/notifications/polling","01.csharp/11.aspnet/04.notifications/02.polling",{"title":884,"path":885,"stem":886},"Server-Sent Events: Однострімовий push від сервера","/csharp/aspnet/notifications/server-sent-events","01.csharp/11.aspnet/04.notifications/03.server-sent-events",{"title":888,"path":889,"stem":890},"WebSockets: Двостороннє з'єднання в реальному часі","/csharp/aspnet/notifications/websockets","01.csharp/11.aspnet/04.notifications/04.websockets",{"title":892,"path":893,"stem":894},"SignalR: Абстракція над транспортами реального часу","/csharp/aspnet/notifications/signalr","01.csharp/11.aspnet/04.notifications/05.signalr",{"title":896,"path":897,"stem":898},"Background Services: Фонові задачі в ASP.NET Core","/csharp/aspnet/notifications/background-services","01.csharp/11.aspnet/04.notifications/06.background-services",{"title":900,"path":901,"stem":902},"Web Push нотифікації","/csharp/aspnet/notifications/web-push","01.csharp/11.aspnet/04.notifications/07.web-push",{"title":904,"path":905,"stem":906},"Email нотифікації","/csharp/aspnet/notifications/email-notifications","01.csharp/11.aspnet/04.notifications/08.email-notifications",{"title":908,"path":909,"stem":910},"Порівняння підходів: Як вибрати правильну технологію нотифікацій","/csharp/aspnet/notifications/choosing-the-right-approach","01.csharp/11.aspnet/04.notifications/09.choosing-the-right-approach",{"title":912,"path":913,"stem":914},"Hangfire: Надійне планування фонових задач","/csharp/aspnet/notifications/hangfire","01.csharp/11.aspnet/04.notifications/10.hangfire",{"title":916,"path":917,"stem":918},"Практика: Конвертація зображень у WebP через Hangfire","/csharp/aspnet/notifications/hangfire-image-webp","01.csharp/11.aspnet/04.notifications/11.hangfire-image-webp",{"title":920,"path":921,"stem":922},"Практика: Підготовка відео до HLS-стрімінгу через Hangfire","/csharp/aspnet/notifications/hangfire-video-hls","01.csharp/11.aspnet/04.notifications/12.hangfire-video-hls",{"title":924,"path":925,"stem":926},"Telegram-нотифікації: від одного повідомлення до масових розсилок і мульти-канального підходу","/csharp/aspnet/notifications/telegram-notifications","01.csharp/11.aspnet/04.notifications/13.telegram-notifications",{"title":928,"icon":929,"path":930,"stem":931,"children":932,"page":59},"Інтернаціоналізація","i-lucide-languages","/csharp/aspnet/i18n","01.csharp/11.aspnet/05.i18n",[933,937],{"title":934,"path":935,"stem":936},"Інтернаціоналізація (i18n) у Minimal API: від A до Я","/csharp/aspnet/i18n/internationalization","01.csharp/11.aspnet/05.i18n/01.internationalization",{"title":938,"path":939,"stem":940},"Humanizer: людиномовні рядки у .NET","/csharp/aspnet/i18n/humanizer","01.csharp/11.aspnet/05.i18n/02.humanizer",{"title":942,"icon":943,"path":944,"stem":945,"children":946,"page":59},"Кешування","i-lucide-layers","/csharp/aspnet/caching","01.csharp/11.aspnet/06.caching",[947,951,955,959,963],{"title":948,"path":949,"stem":950},"Огляд кешування: чотири рівні і коли що обирати","/csharp/aspnet/caching/caching","01.csharp/11.aspnet/06.caching/01.caching",{"title":952,"path":953,"stem":954},"IMemoryCache: кеш в оперативній пам'яті","/csharp/aspnet/caching/memory-cache","01.csharp/11.aspnet/06.caching/02.memory-cache",{"title":956,"path":957,"stem":958},"IDistributedCache і Redis: розподілений кеш","/csharp/aspnet/caching/distributed-cache","01.csharp/11.aspnet/06.caching/03.distributed-cache",{"title":960,"path":961,"stem":962},"Response Cache: HTTP-кешування через Cache-Control","/csharp/aspnet/caching/response-cache","01.csharp/11.aspnet/06.caching/04.response-cache",{"title":964,"path":965,"stem":966},"Output Cache: серверний кеш HTTP-відповідей (.NET 7+)","/csharp/aspnet/caching/output-cache","01.csharp/11.aspnet/06.caching/05.output-cache",{"title":968,"icon":969,"path":970,"stem":971,"children":972,"page":59},"Тестування","i-lucide-test-tube","/csharp/aspnet/testing","01.csharp/11.aspnet/07.testing",[973,977,981,985,989,993,997,1001,1005,1009,1013,1017,1021,1025,1029,1033,1037,1041,1045,1049,1053],{"title":974,"path":975,"stem":976},"Що таке тестування? Від інтуїції до науки","/csharp/aspnet/testing/what-is-testing","01.csharp/11.aspnet/07.testing/01.what-is-testing",{"title":978,"path":979,"stem":980},"Піраміда тестування — Стратегія, а не Догма","/csharp/aspnet/testing/testing-pyramid","01.csharp/11.aspnet/07.testing/02.testing-pyramid",{"title":982,"path":983,"stem":984},"Дві Школи Тестування — Лондон проти Детройту","/csharp/aspnet/testing/testing-schools","01.csharp/11.aspnet/07.testing/03.testing-schools",{"title":986,"path":987,"stem":988},"TDD та BDD — Тести як Дизайн-інструмент","/csharp/aspnet/testing/tdd-and-bdd","01.csharp/11.aspnet/07.testing/04.tdd-and-bdd",{"title":990,"path":991,"stem":992},"Що саме тестувати — Техніки аналізу та Циклomatична складність","/csharp/aspnet/testing/what-to-test","01.csharp/11.aspnet/07.testing/05.what-to-test",{"title":994,"path":995,"stem":996},"Тестові Фреймворки — Навіщо вони і що всередині","/csharp/aspnet/testing/test-frameworks","01.csharp/11.aspnet/07.testing/06.test-frameworks",{"title":998,"path":999,"stem":1000},"xUnit — Факти, Теорії та Lifecycle тестів","/csharp/aspnet/testing/xunit-basics","01.csharp/11.aspnet/07.testing/07.xunit-basics",{"title":1002,"path":1003,"stem":1004},"xUnit Advanced — Fixtures, Кастомізація та Розширення","/csharp/aspnet/testing/xunit-advanced","01.csharp/11.aspnet/07.testing/08.xunit-advanced",{"title":1006,"path":1007,"stem":1008},"Moq — Глибоке занурення в мокування","/csharp/aspnet/testing/mocking-with-moq","01.csharp/11.aspnet/07.testing/09.mocking-with-moq",{"title":1010,"path":1011,"stem":1012},"Тестування Баз Даних — EF Core, SQLite та Testcontainers","/csharp/aspnet/testing/database-testing","01.csharp/11.aspnet/07.testing/10.database-testing",{"title":1014,"path":1015,"stem":1016},"Integration Testing — Частина 1 [Теорія та WebApplicationFactory]","/csharp/aspnet/testing/integration-testing","01.csharp/11.aspnet/07.testing/11.integration-testing",{"title":1018,"path":1019,"stem":1020},"Інтеграційне тестування — Практика","/csharp/aspnet/testing/11a.integration-testing-practice","01.csharp/11.aspnet/07.testing/11a.integration-testing-practice",{"title":1022,"path":1023,"stem":1024},"Integration Testing — Частина 2 [Просунуті Сценарії та Testcontainers]","/csharp/aspnet/testing/integration-testing-advanced","01.csharp/11.aspnet/07.testing/12.integration-testing-advanced",{"title":1026,"path":1027,"stem":1028},"Професійний Postman: Колекції, Змінні та GitHub Інтеграція","/csharp/aspnet/testing/postman-professional","01.csharp/11.aspnet/07.testing/13.postman-professional",{"title":1030,"path":1031,"stem":1032},"HttpClient у Тестах Частина 1: Архітектура та MockHttpMessageHandler","/csharp/aspnet/testing/httpclient-testing","01.csharp/11.aspnet/07.testing/14.httpclient-testing",{"title":1034,"path":1035,"stem":1036},"HttpClient у Тестах Частина 2: WireMock.Net та Resilience","/csharp/aspnet/testing/wiremock-net","01.csharp/11.aspnet/07.testing/15.wiremock-net",{"title":1038,"path":1039,"stem":1040},"Патерни та Анти-патерни Тестування: Test Smells","/csharp/aspnet/testing/testing-patterns","01.csharp/11.aspnet/07.testing/16.testing-patterns",{"title":1042,"path":1043,"stem":1044},"Просунуті інструменти: Time, Snapshots та Властивості","/csharp/aspnet/testing/advanced-testing-tools","01.csharp/11.aspnet/07.testing/17.advanced-testing-tools",{"title":1046,"path":1047,"stem":1048},"Тестування Архітектури з NetArchTest","/csharp/aspnet/testing/architecture-testing","01.csharp/11.aspnet/07.testing/18.architecture-testing",{"title":1050,"path":1051,"stem":1052},"Тестування Продуктивності: BenchmarkDotNet, NBomber та k6","/csharp/aspnet/testing/performance-testing","01.csharp/11.aspnet/07.testing/19.performance-testing",{"title":1054,"path":1055,"stem":1056},"Залишок плану для курсу \"Тестування ASP.NET Minimal API\"","/csharp/aspnet/testing/remaining_plan","01.csharp/11.aspnet/07.testing/remaining_plan",{"title":1058,"icon":1059,"path":1060,"stem":1061,"children":1062,"page":59},"Платежі","i-lucide-credit-card","/csharp/aspnet/payments","01.csharp/11.aspnet/08.payments",[1063,1067,1071,1075,1079,1083,1087,1091,1095,1099,1103,1107],{"title":1064,"path":1065,"stem":1066},"Основи платіжної інфраструктури","/csharp/aspnet/payments/payment-fundamentals","01.csharp/11.aspnet/08.payments/01.payment-fundamentals",{"title":1068,"path":1069,"stem":1070},"Методи оплати в Україні","/csharp/aspnet/payments/payment-methods-ukraine","01.csharp/11.aspnet/08.payments/02.payment-methods-ukraine",{"title":1072,"path":1073,"stem":1074},"PCI DSS та безпека платежів","/csharp/aspnet/payments/pci-dss-security","01.csharp/11.aspnet/08.payments/03.pci-dss-security",{"title":1076,"path":1077,"stem":1078},"Архітектура платіжної підсистеми","/csharp/aspnet/payments/payment-architecture","01.csharp/11.aspnet/08.payments/04.payment-architecture",{"title":1080,"path":1081,"stem":1082},"Інтеграція LiqPay (ПриватБанк)","/csharp/aspnet/payments/liqpay-integration","01.csharp/11.aspnet/08.payments/05.liqpay-integration",{"title":1084,"path":1085,"stem":1086},"Інтеграція Monobank Acquiring API","/csharp/aspnet/payments/monobank-acquiring","01.csharp/11.aspnet/08.payments/06.monobank-acquiring",{"title":1088,"path":1089,"stem":1090},"Інтеграція Stripe","/csharp/aspnet/payments/stripe-integration","01.csharp/11.aspnet/08.payments/07.stripe-integration",{"title":1092,"path":1093,"stem":1094},"Webhooks — глибоке занурення","/csharp/aspnet/payments/webhooks-deep-dive","01.csharp/11.aspnet/08.payments/08.webhooks-deep-dive",{"title":1096,"path":1097,"stem":1098},"Підписки та рекурентні платежі","/csharp/aspnet/payments/subscriptions-recurring","01.csharp/11.aspnet/08.payments/09.subscriptions-recurring",{"title":1100,"path":1101,"stem":1102},"Повернення коштів та диспути","/csharp/aspnet/payments/refunds-disputes","01.csharp/11.aspnet/08.payments/10.refunds-disputes",{"title":1104,"path":1105,"stem":1106},"Тестування платіжних інтеграцій","/csharp/aspnet/payments/testing-payments","01.csharp/11.aspnet/08.payments/11.testing-payments",{"title":1108,"path":1109,"stem":1110},"Чекліст виходу в Production","/csharp/aspnet/payments/production-checklist","01.csharp/11.aspnet/08.payments/12.production-checklist",{"title":1112,"icon":1113,"items":1114,"path":1127,"stem":1128,"children":1129,"page":59},"Популярні бібліотеки","lucide:box",[1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126],"01.fluent-validation","02.mapster","03.erroror-result-pattern","04.serilog","05.mediatr","06.polly","07.health-checks","08.feature-management","09.fluent-email","10.quest-pdf","11.bogus","12.humanizer-guard","/csharp/aspnet/libraries","01.csharp/11.aspnet/09.libraries",[1130,1134,1138,1142,1146,1150,1154,1158,1162,1166,1170,1174,1178],{"title":1131,"path":1132,"stem":1133},"Валідація з FluentValidation в ASP.NET Core","/csharp/aspnet/libraries/fluent-validation","01.csharp/11.aspnet/09.libraries/01.fluent-validation",{"title":1135,"path":1136,"stem":1137},"Маппінг об","/csharp/aspnet/libraries/mapster","01.csharp/11.aspnet/09.libraries/02.mapster",{"title":1139,"path":1140,"stem":1141},"Обробка помилок з ErrorOr та Result Pattern в ASP.NET Core","/csharp/aspnet/libraries/erroror-result-pattern","01.csharp/11.aspnet/09.libraries/03.erroror-result-pattern",{"title":1143,"path":1144,"stem":1145},"Структуроване логування з Serilog в ASP.NET Core","/csharp/aspnet/libraries/serilog","01.csharp/11.aspnet/09.libraries/04.serilog",{"title":1147,"path":1148,"stem":1149},"CQRS та Mediator з MediatR в ASP.NET Core","/csharp/aspnet/libraries/mediatr","01.csharp/11.aspnet/09.libraries/05.mediatr",{"title":1151,"path":1152,"stem":1153},"Відмовостійкість з Polly в ASP.NET Core","/csharp/aspnet/libraries/polly","01.csharp/11.aspnet/09.libraries/06.polly",{"title":1155,"path":1156,"stem":1157},"Health Checks в ASP.NET Core","/csharp/aspnet/libraries/health-checks","01.csharp/11.aspnet/09.libraries/07.health-checks",{"title":1159,"path":1160,"stem":1161},"Feature Management та Feature Flags в ASP.NET Core","/csharp/aspnet/libraries/feature-management","01.csharp/11.aspnet/09.libraries/08.feature-management",{"title":1163,"path":1164,"stem":1165},"Відправка Email з FluentEmail в ASP.NET Core","/csharp/aspnet/libraries/fluent-email","01.csharp/11.aspnet/09.libraries/09.fluent-email",{"title":1167,"path":1168,"stem":1169},"Генерація PDF з QuestPDF в ASP.NET Core","/csharp/aspnet/libraries/quest-pdf","01.csharp/11.aspnet/09.libraries/10.quest-pdf",{"title":1171,"path":1172,"stem":1173},"Генерація тестових даних з Bogus в ASP.NET Core","/csharp/aspnet/libraries/bogus","01.csharp/11.aspnet/09.libraries/11.bogus",{"title":1175,"path":1176,"stem":1177},"Humanizer та Guard Clauses в ASP.NET Core","/csharp/aspnet/libraries/humanizer-guard","01.csharp/11.aspnet/09.libraries/12.humanizer-guard",{"title":1179,"path":1180,"stem":1181},"План модуля 10.libraries — Популярні бібліотеки ASP.NET","/csharp/aspnet/libraries/plan","01.csharp/11.aspnet/09.libraries/plan",{"title":1183,"icon":1184,"path":1185,"stem":1186,"children":1187,"page":59},"Razor Pages","i-lucide-layout-template","/csharp/aspnet/razor-pages","01.csharp/11.aspnet/10.razor-pages",[1188,1192,1196,1200,1204,1208],{"title":1189,"path":1190,"stem":1191},"Від Minimal API до Razor Pages: концептуальний перехід","/csharp/aspnet/razor-pages/from-minimal-api","01.csharp/11.aspnet/10.razor-pages/01.from-minimal-api",{"title":1193,"path":1194,"stem":1195},"PageModel: логіка сторінки Razor Pages","/csharp/aspnet/razor-pages/page-model","01.csharp/11.aspnet/10.razor-pages/02.page-model",{"title":1197,"path":1198,"stem":1199},"Razor синтаксис: шаблонізатор у .cshtml","/csharp/aspnet/razor-pages/razor-syntax","01.csharp/11.aspnet/10.razor-pages/03.razor-syntax",{"title":1201,"path":1202,"stem":1203},"Tag Helpers: типізований HTML","/csharp/aspnet/razor-pages/tag-helpers","01.csharp/11.aspnet/10.razor-pages/04.tag-helpers",{"title":1205,"path":1206,"stem":1207},"Форми і валідація: повний цикл обробки даних","/csharp/aspnet/razor-pages/forms-validation","01.csharp/11.aspnet/10.razor-pages/05.forms-validation",{"title":1209,"path":1210,"stem":1211},"Практичний проєкт: TaskManager на Razor Pages","/csharp/aspnet/razor-pages/project-task-manager","01.csharp/11.aspnet/10.razor-pages/06.project-task-manager",{"title":1213,"path":1214,"stem":1215,"children":1216,"page":59},"ASP.NET Core MVC","/csharp/aspnet/mvc","01.csharp/11.aspnet/11.mvc",[1217,1221,1225,1229,1233,1237,1241,1245,1249,1253,1257,1261,1265,1269,1273,1277,1281,1285],{"title":1218,"path":1219,"stem":1220},"Патерн MVC: архітектура, що змінила веб","/csharp/aspnet/mvc/mvc-pattern","01.csharp/11.aspnet/11.mvc/01.mvc-pattern",{"title":1222,"path":1223,"stem":1224},"Від Razor Pages до MVC: концептуальний перехід","/csharp/aspnet/mvc/from-razor-pages","01.csharp/11.aspnet/11.mvc/02.from-razor-pages",{"title":1226,"path":1227,"stem":1228},"Controllers та Actions: серце MVC","/csharp/aspnet/mvc/controllers-actions","01.csharp/11.aspnet/11.mvc/03.controllers-actions",{"title":1230,"path":1231,"stem":1232},"Маршрутизація в MVC: Convention vs Attribute Routing","/csharp/aspnet/mvc/routing-mvc","01.csharp/11.aspnet/11.mvc/04.routing-mvc",{"title":1234,"path":1235,"stem":1236},"Model Binding: від HTTP до C#","/csharp/aspnet/mvc/model-binding","01.csharp/11.aspnet/11.mvc/05.model-binding",{"title":1238,"path":1239,"stem":1240},"Views, ViewData, ViewBag, TempData і ViewModel","/csharp/aspnet/mvc/views-viewdata-tempdata","01.csharp/11.aspnet/11.mvc/06.views-viewdata-tempdata",{"title":1242,"path":1243,"stem":1244},"Filters: аспектно-орієнтоване програмування в MVC","/csharp/aspnet/mvc/filters","01.csharp/11.aspnet/11.mvc/07.filters",{"title":1246,"path":1247,"stem":1248},"Areas: структурування великих застосунків","/csharp/aspnet/mvc/areas","01.csharp/11.aspnet/11.mvc/08.areas",{"title":1250,"path":1251,"stem":1252},"View Components: повторювані незалежні блоки UI","/csharp/aspnet/mvc/view-components","01.csharp/11.aspnet/11.mvc/09.view-components",{"title":1254,"path":1255,"stem":1256},"Display та Editor Templates","/csharp/aspnet/mvc/display-editor-templates","01.csharp/11.aspnet/11.mvc/10.display-editor-templates",{"title":1258,"path":1259,"stem":1260},"Валідація: IValidatableObject та FluentValidation","/csharp/aspnet/mvc/validation-advanced","01.csharp/11.aspnet/11.mvc/11.validation-advanced",{"title":1262,"path":1263,"stem":1264},"HTMX: інтерактивність через HTML-атрибути","/csharp/aspnet/mvc/htmx","01.csharp/11.aspnet/11.mvc/12.htmx",{"title":1266,"path":1267,"stem":1268},"HTMX у ASP.NET Core MVC: серверна інтеграція","/csharp/aspnet/mvc/ajax-htmx-mvc","01.csharp/11.aspnet/11.mvc/13.ajax-htmx-mvc",{"title":1270,"path":1271,"stem":1272},"Практичний проєкт: Каталог товарів з HTMX","/csharp/aspnet/mvc/htmx-project","01.csharp/11.aspnet/11.mvc/14.htmx-project",{"title":1274,"path":1275,"stem":1276},"Завантаження та обробка файлів","/csharp/aspnet/mvc/file-upload","01.csharp/11.aspnet/11.mvc/15.file-upload",{"title":1278,"path":1279,"stem":1280},"Глобалізація та Локалізація MVC","/csharp/aspnet/mvc/globalization-localization","01.csharp/11.aspnet/11.mvc/16.globalization-localization",{"title":1282,"path":1283,"stem":1284},"Підсумковий проєкт: Блог-платформа","/csharp/aspnet/mvc/mvc-project","01.csharp/11.aspnet/11.mvc/17.mvc-project",{"title":1286,"path":1287,"stem":1288},"План курсу: ASP.NET Core MVC","/csharp/aspnet/mvc/plan","01.csharp/11.aspnet/11.mvc/plan",{"title":1290,"path":1291,"stem":1292,"children":1293,"page":59},"Web Api","/csharp/aspnet/web-api","01.csharp/11.aspnet/12.web-api",[1294,1298,1302,1306,1310,1314,1318,1322,1326,1330,1334,1338,1342],{"title":1295,"path":1296,"stem":1297},"Від Minimal API до Controller-based API","/csharp/aspnet/web-api/from-minimal-api-to-controllers","01.csharp/11.aspnet/12.web-api/01.from-minimal-api-to-controllers",{"title":1299,"path":1300,"stem":1301},"ControllerBase, ActionResult\u003CT> та Response Types","/csharp/aspnet/web-api/controller-base-actionresult","01.csharp/11.aspnet/12.web-api/02.controller-base-actionresult",{"title":1303,"path":1304,"stem":1305},"Content Negotiation - JSON, XML та власні форматери","/csharp/aspnet/web-api/content-negotiation","01.csharp/11.aspnet/12.web-api/03.content-negotiation",{"title":1307,"path":1308,"stem":1309},"Версіонування API","/csharp/aspnet/web-api/api-versioning","01.csharp/11.aspnet/12.web-api/04.api-versioning",{"title":1311,"path":1312,"stem":1313},"ProblemDetails та структурована обробка помилок","/csharp/aspnet/web-api/problemdetails-error-handling","01.csharp/11.aspnet/12.web-api/05.problemdetails-error-handling",{"title":1315,"path":1316,"stem":1317},"Фільтри у Web API контексті","/csharp/aspnet/web-api/filters-for-api","01.csharp/11.aspnet/12.web-api/06.filters-for-api",{"title":1319,"path":1320,"stem":1321},"Пагінація, фільтрація та сортування","/csharp/aspnet/web-api/pagination-filtering-sorting","01.csharp/11.aspnet/12.web-api/07.pagination-filtering-sorting",{"title":1323,"path":1324,"stem":1325},"HATEOAS та Resource Expansion","/csharp/aspnet/web-api/hateoas-resource-expansion","01.csharp/11.aspnet/12.web-api/08.hateoas-resource-expansion",{"title":1327,"path":1328,"stem":1329},"Гібридна архітектура - Minimal API + Controllers","/csharp/aspnet/web-api/minimal-api-vs-controllers-hybrid","01.csharp/11.aspnet/12.web-api/09.minimal-api-vs-controllers-hybrid",{"title":1331,"path":1332,"stem":1333},"Документація API - Swashbuckle, NSwag та генерація клієнтів","/csharp/aspnet/web-api/api-documentation-generation","01.csharp/11.aspnet/12.web-api/10.api-documentation-generation",{"title":1335,"path":1336,"stem":1337},"Health Checks та моніторинг API","/csharp/aspnet/web-api/health-checks-monitoring","01.csharp/11.aspnet/12.web-api/11.health-checks-monitoring",{"title":1339,"path":1340,"stem":1341},"Підсумковий проєкт - Production-Ready REST API","/csharp/aspnet/web-api/web-api-project","01.csharp/11.aspnet/12.web-api/12.web-api-project",{"title":1343,"path":1344,"stem":1345},"План курсу: ASP.NET Core Web API (Controllers)","/csharp/aspnet/web-api/plan","01.csharp/11.aspnet/12.web-api/plan",{"title":1347,"icon":1348,"path":1349,"stem":1350,"children":1351,"page":59},"Desktop UI","i-lucide-app-window","/csharp/desktop-ui","01.csharp/12.desktop-ui",[1352,1356,1360,1364,1368,1372,1376,1380,1384,1388,1392,1396,1400,1404,1408,1412,1416,1420,1424,1428,1432,1436,1440,1444,1448,1452,1456,1460,1464,1468,1472,1476,1480,1484,1488,1492,1496,1500,1504,1508,1512,1516,1520,1524,1528,1532,1536,1540,1544,1548,1552,1556,1560,1564,1568,1572,1576,1580,1584,1588,1592,1596,1600,1604,1608,1612,1616,1620,1624,1628,1632],{"title":1353,"path":1354,"stem":1355},"Що таке десктопна розробка?","/csharp/desktop-ui/what-is-desktop-dev","01.csharp/12.desktop-ui/01.what-is-desktop-dev",{"title":1357,"path":1358,"stem":1359},"Архітектура WPF — як влаштований графічний інтерфейс","/csharp/desktop-ui/wpf-architecture","01.csharp/12.desktop-ui/02.wpf-architecture",{"title":1361,"path":1362,"stem":1363},"Перший WPF-проєкт — від нуля до вікна","/csharp/desktop-ui/first-wpf-app","01.csharp/12.desktop-ui/03.first-wpf-app",{"title":1365,"path":1366,"stem":1367},"Перший Avalonia-проєкт: WPF для всіх платформ","/csharp/desktop-ui/03a.first-avalonia-app","01.csharp/12.desktop-ui/03a.first-avalonia-app",{"title":1369,"path":1370,"stem":1371},"XAML: декларативний інтерфейс","/csharp/desktop-ui/xaml-basics","01.csharp/12.desktop-ui/04.xaml-basics",{"title":1373,"path":1374,"stem":1375},"Fluent UI у WPF — сучасний дизайн Windows 11","/csharp/desktop-ui/04a.wpf-fluent-ui","01.csharp/12.desktop-ui/04a.wpf-fluent-ui",{"title":1377,"path":1378,"stem":1379},"WPF UI — сучасна бібліотека Fluent контролів","/csharp/desktop-ui/04b.wpf-ui-library","01.csharp/12.desktop-ui/04b.wpf-ui-library",{"title":1381,"path":1382,"stem":1383},"HandyControl — велика бібліотека UI контролів для WPF","/csharp/desktop-ui/04c.handycontrol-library","01.csharp/12.desktop-ui/04c.handycontrol-library",{"title":1385,"path":1386,"stem":1387},"Простори імен та ресурси XAML","/csharp/desktop-ui/xaml-namespaces-resources","01.csharp/12.desktop-ui/05.xaml-namespaces-resources",{"title":1389,"path":1390,"stem":1391},"XAML в Avalonia: ключові відмінності від WPF","/csharp/desktop-ui/05a.avalonia-xaml-differences","01.csharp/12.desktop-ui/05a.avalonia-xaml-differences",{"title":1393,"path":1394,"stem":1395},"Розширення розмітки XAML (Markup Extensions)","/csharp/desktop-ui/xaml-markup-extensions","01.csharp/12.desktop-ui/06.xaml-markup-extensions",{"title":1397,"path":1398,"stem":1399},"Панелі Layout: StackPanel, WrapPanel, DockPanel","/csharp/desktop-ui/layout-panels-part1","01.csharp/12.desktop-ui/07.layout-panels-part1",{"title":1401,"path":1402,"stem":1403},"Grid, Canvas, UniformGrid","/csharp/desktop-ui/layout-panels-part2","01.csharp/12.desktop-ui/07.layout-panels-part2",{"title":1405,"path":1406,"stem":1407},"Просунуті техніки Layout","/csharp/desktop-ui/layout-advanced","01.csharp/12.desktop-ui/08.layout-advanced",{"title":1409,"path":1410,"stem":1411},"Адаптивний Layout та найкращі практики","/csharp/desktop-ui/layout-responsive","01.csharp/12.desktop-ui/09.layout-responsive",{"title":1413,"path":1414,"stem":1415},"Layout в Avalonia: відмінності та нові можливості","/csharp/desktop-ui/09a.layout-avalonia","01.csharp/12.desktop-ui/09a.layout-avalonia",{"title":1417,"path":1418,"stem":1419},"Button, Image, ProgressBar та інші базові контроли","/csharp/desktop-ui/basic-controls","01.csharp/12.desktop-ui/10.basic-controls",{"title":1421,"path":1422,"stem":1423},"Контроли в Avalonia: відмінності від WPF","/csharp/desktop-ui/10a.controls-avalonia","01.csharp/12.desktop-ui/10a.controls-avalonia",{"title":1425,"path":1426,"stem":1427},"Текстові контроли — TextBlock, TextBox, RichTextBox","/csharp/desktop-ui/text-controls","01.csharp/12.desktop-ui/11.text-controls",{"title":1429,"path":1430,"stem":1431},"Контроли вибору — CheckBox, RadioButton, ComboBox, ListBox, DatePicker","/csharp/desktop-ui/selection-controls","01.csharp/12.desktop-ui/12.selection-controls",{"title":1433,"path":1434,"stem":1435},"Content Model — GroupBox, Expander, TabControl, StatusBar","/csharp/desktop-ui/content-controls","01.csharp/12.desktop-ui/13.content-controls",{"title":1437,"path":1438,"stem":1439},"UI/UX принципи десктопних застосунків","/csharp/desktop-ui/13a.ui-ux-principles","01.csharp/12.desktop-ui/13a.ui-ux-principles",{"title":1441,"path":1442,"stem":1443},"Dependency Properties — Концепція та Value Resolution","/csharp/desktop-ui/dependency-properties-part1","01.csharp/12.desktop-ui/14.dependency-properties-part1",{"title":1445,"path":1446,"stem":1447},"Avalonia Property System — StyledProperty та DirectProperty","/csharp/desktop-ui/14a.avalonia-property-system","01.csharp/12.desktop-ui/14a.avalonia-property-system",{"title":1449,"path":1450,"stem":1451},"Attached Properties — Властивості без меж","/csharp/desktop-ui/attached-properties","01.csharp/12.desktop-ui/15.attached-properties",{"title":1453,"path":1454,"stem":1455},"Routed Events — Маршрутизація подій у WPF","/csharp/desktop-ui/routed-events","01.csharp/12.desktop-ui/16.routed-events",{"title":1457,"path":1458,"stem":1459},"Data Binding — Від Code-Behind до Декларативності","/csharp/desktop-ui/data-binding-basics-part1","01.csharp/12.desktop-ui/17.data-binding-basics-part1",{"title":1461,"path":1462,"stem":1463},"INotifyPropertyChanged — Живе оновлення UI","/csharp/desktop-ui/data-binding-basics-part2","01.csharp/12.desktop-ui/17.data-binding-basics-part2",{"title":1465,"path":1466,"stem":1467},"Compiled Bindings в Avalonia — Безпека на етапі компіляції","/csharp/desktop-ui/17a.avalonia-compiled-bindings","01.csharp/12.desktop-ui/17a.avalonia-compiled-bindings",{"title":1469,"path":1470,"stem":1471},"Просунутий Data Binding — ElementName, RelativeSource, MultiBinding","/csharp/desktop-ui/data-binding-advanced","01.csharp/12.desktop-ui/18.data-binding-advanced",{"title":1473,"path":1474,"stem":1475},"Value Converters — Перетворення типів даних у Data Binding","/csharp/desktop-ui/value-converters","01.csharp/12.desktop-ui/19.value-converters",{"title":1477,"path":1478,"stem":1479},"Data Templates — Візуалізація об'єктів у WPF","/csharp/desktop-ui/data-templates","01.csharp/12.desktop-ui/20.data-templates",{"title":1481,"path":1482,"stem":1483},"Collections Binding Part 1 — ObservableCollection та ItemsControl","/csharp/desktop-ui/collections-binding-part1","01.csharp/12.desktop-ui/21.collections-binding-part1",{"title":1485,"path":1486,"stem":1487},"Collections Binding Part 2 — ICollectionView, Filtering, Sorting та Virtualization","/csharp/desktop-ui/collections-binding-part2","01.csharp/12.desktop-ui/21.collections-binding-part2",{"title":1489,"path":1490,"stem":1491},"MVVM Pattern — Від Spaghetti Code до архітектури","/csharp/desktop-ui/mvvm-pattern","01.csharp/12.desktop-ui/22.mvvm-pattern",{"title":1493,"path":1494,"stem":1495},"ViewModel Implementation — Від BaseViewModel до валідації","/csharp/desktop-ui/viewmodel-implementation","01.csharp/12.desktop-ui/23.viewmodel-implementation",{"title":1497,"path":1498,"stem":1499},"Commands — Від event handlers до декларативних команд","/csharp/desktop-ui/commands","01.csharp/12.desktop-ui/24.commands",{"title":1501,"path":1502,"stem":1503},"MVVM Toolkit — MVVM без boilerplate через Source Generators","/csharp/desktop-ui/mvvm-toolkit","01.csharp/12.desktop-ui/25.mvvm-toolkit",{"title":1505,"path":1506,"stem":1507},"Messenger Pattern — Комунікація між ViewModel без прямих посилань","/csharp/desktop-ui/messenger-pattern","01.csharp/12.desktop-ui/26.messenger-pattern",{"title":1509,"path":1510,"stem":1511},"Стилі WPF — CSS для десктопу","/csharp/desktop-ui/styles-basics","01.csharp/12.desktop-ui/27.styles-basics",{"title":1513,"path":1514,"stem":1515},"CSS-like стилі Avalonia","/csharp/desktop-ui/27a.avalonia-css-styling","01.csharp/12.desktop-ui/27a.avalonia-css-styling",{"title":1517,"path":1518,"stem":1519},"Control Templates — Частина 1. Концепція та TemplateBinding","/csharp/desktop-ui/control-templates-part1","01.csharp/12.desktop-ui/28.control-templates-part1",{"title":1521,"path":1522,"stem":1523},"Control Templates — Частина 2. Named Parts та ContentPresenter","/csharp/desktop-ui/control-templates-part2","01.csharp/12.desktop-ui/28.control-templates-part2",{"title":1525,"path":1526,"stem":1527},"Control Themes в Avalonia — нова ера стилізації","/csharp/desktop-ui/28a.avalonia-control-themes","01.csharp/12.desktop-ui/28a.avalonia-control-themes",{"title":1529,"path":1530,"stem":1531},"Triggers та Visual State Manager у WPF","/csharp/desktop-ui/triggers-visual-states","01.csharp/12.desktop-ui/29.triggers-visual-states",{"title":1533,"path":1534,"stem":1535},"Pseudo-classes в Avalonia — замість WPF Triggers","/csharp/desktop-ui/29a.avalonia-pseudo-classes","01.csharp/12.desktop-ui/29a.avalonia-pseudo-classes",{"title":1537,"path":1538,"stem":1539},"Теми та ресурсні словники у WPF","/csharp/desktop-ui/resources-themes","01.csharp/12.desktop-ui/30.resources-themes",{"title":1541,"path":1542,"stem":1543},"Avalonia Themes — Fluent Design та система тематизації","/csharp/desktop-ui/30a.avalonia-themes-fluent","01.csharp/12.desktop-ui/30a.avalonia-themes-fluent",{"title":1545,"path":1546,"stem":1547},"Контроли колекцій — глибоке занурення","/csharp/desktop-ui/collection-controls","01.csharp/12.desktop-ui/31.collection-controls",{"title":1549,"path":1550,"stem":1551},"DataGrid — колонки та базове відображення","/csharp/desktop-ui/datagrid-part1","01.csharp/12.desktop-ui/32.datagrid-part1",{"title":1553,"path":1554,"stem":1555},"DataGrid — сортування, фільтрація, редагування","/csharp/desktop-ui/datagrid-part2","01.csharp/12.desktop-ui/32.datagrid-part2",{"title":1557,"path":1558,"stem":1559},"TreeView та GridView","/csharp/desktop-ui/treeview-listview","01.csharp/12.desktop-ui/33.treeview-listview",{"title":1561,"path":1562,"stem":1563},"Меню, Toolbar, ContextMenu, StatusBar","/csharp/desktop-ui/menus-toolbars","01.csharp/12.desktop-ui/34.menus-toolbars",{"title":1565,"path":1566,"stem":1567},"Навігація та керування вікнами. Частина 1: вікна та сторінки","/csharp/desktop-ui/navigation-windows-part1","01.csharp/12.desktop-ui/35.navigation-windows-part1",{"title":1569,"path":1570,"stem":1571},"Навігація та керування вікнами. Частина 2: MVVM-навігація","/csharp/desktop-ui/navigation-windows-part2","01.csharp/12.desktop-ui/35.navigation-windows-part2",{"title":1573,"path":1574,"stem":1575},"Avalonia — Навігація та діалоги","/csharp/desktop-ui/35a.avalonia-navigation-dialogs","01.csharp/12.desktop-ui/35a.avalonia-navigation-dialogs",{"title":1577,"path":1578,"stem":1579},"Діалоги та File Pickers у WPF","/csharp/desktop-ui/dialogs-file-pickers","01.csharp/12.desktop-ui/36.dialogs-file-pickers",{"title":1581,"path":1582,"stem":1583},"UserControl: компонентний підхід у WPF","/csharp/desktop-ui/user-controls","01.csharp/12.desktop-ui/37.user-controls",{"title":1585,"path":1586,"stem":1587},"Custom Controls: Lookless Controls у WPF","/csharp/desktop-ui/custom-controls","01.csharp/12.desktop-ui/38.custom-controls",{"title":1589,"path":1590,"stem":1591},"Avalonia TemplatedControl — Lookless Controls","/csharp/desktop-ui/38a.avalonia-templated-controls","01.csharp/12.desktop-ui/38a.avalonia-templated-controls",{"title":1593,"path":1594,"stem":1595},"Анімації у WPF: Storyboard та Easing Functions","/csharp/desktop-ui/animations-transitions","01.csharp/12.desktop-ui/39.animations-transitions",{"title":1597,"path":1598,"stem":1599},"Анімації в Avalonia","/csharp/desktop-ui/39a.avalonia-animations","01.csharp/12.desktop-ui/39a.avalonia-animations",{"title":1601,"path":1602,"stem":1603},"2D Графіка та Мультимедіа у WPF","/csharp/desktop-ui/media-graphics","01.csharp/12.desktop-ui/40.media-graphics",{"title":1605,"path":1606,"stem":1607},"Dependency Injection у WPF та Avalonia","/csharp/desktop-ui/di-integration","01.csharp/12.desktop-ui/41.di-integration",{"title":1609,"path":1610,"stem":1611},"SQLite та EF Core у десктопних додатках","/csharp/desktop-ui/data-persistence-part1","01.csharp/12.desktop-ui/42.data-persistence-part1",{"title":1613,"path":1614,"stem":1615},"Repository Pattern та Unit of Work","/csharp/desktop-ui/data-persistence-part2","01.csharp/12.desktop-ui/43.data-persistence-part2",{"title":1617,"path":1618,"stem":1619},"Тестування ViewModels","/csharp/desktop-ui/viewmodel-testing","01.csharp/12.desktop-ui/44.viewmodel-testing",{"title":1621,"path":1622,"stem":1623},"Avalonia Headless Testing — тестування UI без вікон","/csharp/desktop-ui/44a.avalonia-headless-testing","01.csharp/12.desktop-ui/44a.avalonia-headless-testing",{"title":1625,"path":1626,"stem":1627},"Кросплатформна розробка з Avalonia","/csharp/desktop-ui/avalonia-cross-platform","01.csharp/12.desktop-ui/45.avalonia-cross-platform",{"title":1629,"path":1630,"stem":1631},"Пакування та розгортання Avalonia додатків","/csharp/desktop-ui/avalonia-packaging-deployment","01.csharp/12.desktop-ui/46.avalonia-packaging-deployment",{"title":1633,"path":1634,"stem":1635},"Розгортання WPF застосунків","/csharp/desktop-ui/wpf-packaging-deployment","01.csharp/12.desktop-ui/47.wpf-packaging-deployment",{"title":1637,"path":1638,"stem":1639},"C# & .NET: The Ultimate Roadmap","/csharp/roadmap","01.csharp/roadmap",{"title":1641,"icon":1642,"path":1643,"stem":1644,"children":1645,"page":59},"C++","i-devicon-cplusplus","/cpp","02.cpp",[1646,1650,1654,1658,1662,1666,1670,1674,1678,1681,1685,1689,1693,1697,1701,1705,1709,1713,1717,1721,1725,1729,1733,1737,1741,1745,1749,1753,1757,1761],{"title":1647,"path":1648,"stem":1649},"Вступ у програмування та алгоритми","/cpp/intro-algorithms","02.cpp/01.intro-algorithms",{"title":1651,"path":1652,"stem":1653},"Code Style: угоди про оформлення коду","/cpp/code-style","02.cpp/02.code-style",{"title":1655,"path":1656,"stem":1657},"Середовище розробки та перший 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типу void","/cpp/void-pointers","02.cpp/20.void-pointers",{"title":1726,"path":1727,"stem":1728},"Вказівники на вказівники","/cpp/pointers-to-pointers","02.cpp/21.pointers-to-pointers",{"title":1730,"path":1731,"stem":1732},"Оператор доступу до членів через вказівник (->)","/cpp/member-access-operator","02.cpp/22.member-access-operator",{"title":1734,"path":1735,"stem":1736},"Цикл for-each (Range-based for)","/cpp/foreach-loop","02.cpp/23.foreach-loop",{"title":1738,"path":1739,"stem":1740},"Вказівники на функції","/cpp/function-pointers","02.cpp/24.function-pointers",{"title":1742,"path":1743,"stem":1744},"Лямбда-вирази","/cpp/lambdas","02.cpp/25.lambdas",{"title":1746,"path":1747,"stem":1748},"Лямбда-захоплення","/cpp/lambda-captures","02.cpp/26.lambda-captures",{"title":1750,"path":1751,"stem":1752},"Еліпсис","/cpp/ellipsis","02.cpp/27.ellipsis",{"title":1754,"path":1755,"stem":1756},"Аргументи командного рядка","/cpp/command-line-arguments","02.cpp/28.command-line-arguments",{"title":1758,"path":1759,"stem":1760},"Перерахування (enum)","/cpp/enum","02.cpp/29.enum",{"title":1762,"path":1763,"stem":1764},"План навчання: Курс C++ — Продовження (Статті 29–60+)","/cpp/curriculum-plan","02.cpp/curriculum-plan",{"title":1766,"icon":1767,"path":1768,"stem":1769,"children":1770,"page":59},"JavaScript","i-devicon-javascript","/javascript","03.javascript",[1771,1797,1851,1873,2177,2215],{"title":1772,"icon":1773,"path":1774,"stem":1775,"children":1776,"page":59},"Events","i-lucide-mouse-pointer-click","/javascript/events","03.javascript/01.events",[1777,1781,1785,1789,1793],{"title":1778,"path":1779,"stem":1780},"Вступ до подій браузера","/javascript/events/intro","03.javascript/01.events/01.intro",{"title":1782,"path":1783,"stem":1784},"Бульбашковий механізм (Bubbling) та занурення (Capturing)","/javascript/events/bubbling-capturing","03.javascript/01.events/02.bubbling-capturing",{"title":1786,"path":1787,"stem":1788},"Делегування подій (Event Delegation)","/javascript/events/delegate-events","03.javascript/01.events/03.delegate-events",{"title":1790,"path":1791,"stem":1792},"Типові дії браузера та preventDefault()","/javascript/events/prevent-default","03.javascript/01.events/04.prevent-default",{"title":1794,"path":1795,"stem":1796},"Запуск користувацьких подій (Custom Events)","/javascript/events/custom-events","03.javascript/01.events/05.custom-events",{"title":1798,"icon":1799,"path":1800,"stem":1801,"children":1802,"page":59},"Network","i-lucide-globe","/javascript/network","03.javascript/02.network",[1803,1807,1811,1815,1819,1823,1827,1831,1835,1839,1843,1847],{"title":1804,"path":1805,"stem":1806},"Fetch API - Сучасний підхід до HTTP-запитів","/javascript/network/01-fetch-api","03.javascript/02.network/01-fetch-api",{"title":1808,"path":1809,"stem":1810},"FormData - Робота з формами та файлами","/javascript/network/02-formdata","03.javascript/02.network/02-formdata",{"title":1812,"path":1813,"stem":1814},"Відстеження прогресу завантаження","/javascript/network/03-download-progress","03.javascript/02.network/03-download-progress",{"title":1816,"path":1817,"stem":1818},"Переривання fetch-запитів","/javascript/network/04-abort-requests","03.javascript/02.network/04-abort-requests",{"title":1820,"path":1821,"stem":1822},"CORS - Запити між різними джерелами","/javascript/network/05-cors","03.javascript/02.network/05-cors",{"title":1824,"path":1825,"stem":1826},"Fetch API - Повний довідник опцій","/javascript/network/06-fetch-options","03.javascript/02.network/06-fetch-options",{"title":1828,"path":1829,"stem":1830},"URL Objects - Робота з посиланнями","/javascript/network/07-url-objects","03.javascript/02.network/07-url-objects",{"title":1832,"path":1833,"stem":1834},"XMLHttpRequest - AJAX та низькорівневі запити","/javascript/network/08-xmlhttprequest","03.javascript/02.network/08-xmlhttprequest",{"title":1836,"path":1837,"stem":1838},"Відновлюване завантаження файлів","/javascript/network/09-resumable-upload","03.javascript/02.network/09-resumable-upload",{"title":1840,"path":1841,"stem":1842},"Cookies, document.cookie та світ після \"Cookiepocalypse\"","/javascript/network/10-cookies","03.javascript/02.network/10-cookies",{"title":1844,"path":1845,"stem":1846},"js-cookie: Керування Cookies без Болю","/javascript/network/11-js-cookie","03.javascript/02.network/11-js-cookie",{"title":1848,"path":1849,"stem":1850},"Axios: Потужний HTTP-клієнт для JavaScript","/javascript/network/12-axios","03.javascript/02.network/12-axios",{"title":1852,"icon":1853,"path":1854,"stem":1855,"children":1856,"page":59},"Bom","i-lucide-monitor","/javascript/bom","03.javascript/03.bom",[1857,1861,1865,1869],{"title":1858,"path":1859,"stem":1860},"LocalStorage, SessionStorage та patterns збереження даних","/javascript/bom/01-localstorage","03.javascript/03.bom/01-localstorage",{"title":1862,"path":1863,"stem":1864},"Location Object - Керування адресою сторінки","/javascript/bom/02-location-object","03.javascript/03.bom/02-location-object",{"title":1866,"path":1867,"stem":1868},"History API - Керування історією браузера","/javascript/bom/03-history-api","03.javascript/03.bom/03-history-api",{"title":1870,"path":1871,"stem":1872},"Navigator Object - Ідентифікація та Можливості Пристрою","/javascript/bom/04-navigator-object","03.javascript/03.bom/04-navigator-object",{"title":1874,"icon":1875,"path":1876,"stem":1877,"children":1878},"React","i-devicon-react","/javascript/react","03.javascript/04.react/index",[1879,1880,1884,1888,1892,1896,1959,1994,2146],{"title":1874,"path":1876,"stem":1877},{"title":1881,"path":1882,"stem":1883},"Робота з Формами в React","/javascript/react/react-forms","03.javascript/04.react/01.react-forms",{"title":1885,"path":1886,"stem":1887},"React Hook Form: Професійна Робота з Формами","/javascript/react/react-hook-form","03.javascript/04.react/02.react-hook-form",{"title":1889,"path":1890,"stem":1891},"React Hook Form: Глибоке Розуміння Архітектури та Оптимізації","/javascript/react/react-hook-form-new","03.javascript/04.react/02.react-hook-form-new",{"title":1893,"path":1894,"stem":1895},"Axios та React: Професійна Архітектура Запитів","/javascript/react/data-fetching-axios","03.javascript/04.react/03.data-fetching-axios",{"title":1897,"icon":132,"path":1898,"stem":1899,"children":1900},"Tanstack Query","/javascript/react/tanstack-query","03.javascript/04.react/04.tanstack-query/index",[1901,1903,1907,1911,1915,1919,1923,1927,1931,1935,1939,1943,1947,1951,1955],{"title":1902,"path":1898,"stem":1899},"TanStack Query: Майстерність Керування Станом Сервера",{"title":1904,"path":1905,"stem":1906},"Парадигма Server State: Чому useEffect недостатньо","/javascript/react/tanstack-query/server-state-paradigm","03.javascript/04.react/04.tanstack-query/01.server-state-paradigm",{"title":1908,"path":1909,"stem":1910},"Встановлення та Налаштування: Фундамент","/javascript/react/tanstack-query/installation-and-devtools","03.javascript/04.react/04.tanstack-query/02.installation-and-devtools",{"title":1912,"path":1913,"stem":1914},"Основи Запитів та Магія Ключів","/javascript/react/tanstack-query/query-basics-and-keys","03.javascript/04.react/04.tanstack-query/03.query-basics-and-keys",{"title":1916,"path":1917,"stem":1918},"Синхронізація Даних: Життєвий Цикл Запиту","/javascript/react/tanstack-query/data-synchronization","03.javascript/04.react/04.tanstack-query/04.data-synchronization",{"title":1920,"path":1921,"stem":1922},"Мутації та Інвалідація: Зміна Даних","/javascript/react/tanstack-query/mutations-and-invalidation","03.javascript/04.react/04.tanstack-query/05.mutations-and-invalidation",{"title":1924,"path":1925,"stem":1926},"Оптимістичні Оновлення: Швидше за Світло","/javascript/react/tanstack-query/optimistic-updates","03.javascript/04.react/04.tanstack-query/06.optimistic-updates",{"title":1928,"path":1929,"stem":1930},"Пагінація та Infinite Scroll","/javascript/react/tanstack-query/pagination-and-load-more","03.javascript/04.react/04.tanstack-query/07.pagination-and-load-more",{"title":1932,"path":1933,"stem":1934},"Просунуті Патерни та Оптимізація","/javascript/react/tanstack-query/advanced-patterns","03.javascript/04.react/04.tanstack-query/08.advanced-patterns",{"title":1936,"path":1937,"stem":1938},"Архітектура та Best Practices","/javascript/react/tanstack-query/architecture-and-best-practices","03.javascript/04.react/04.tanstack-query/09.architecture-and-best-practices",{"title":1940,"path":1941,"stem":1942},"Server-Side Rendering (SSR) та Гідратація","/javascript/react/tanstack-query/server-side-rendering","03.javascript/04.react/04.tanstack-query/10.server-side-rendering",{"title":1944,"path":1945,"stem":1946},"Стратегії Тестування","/javascript/react/tanstack-query/testing-strategies","03.javascript/04.react/04.tanstack-query/11.testing-strategies",{"title":1948,"path":1949,"stem":1950},"Аутентифікація та Обробка Помилок","/javascript/react/tanstack-query/authentication-and-errors","03.javascript/04.react/04.tanstack-query/12.authentication-and-errors",{"title":1952,"path":1953,"stem":1954},"React Suspense та Майбутнє","/javascript/react/tanstack-query/react-suspense","03.javascript/04.react/04.tanstack-query/13.react-suspense",{"title":1956,"path":1957,"stem":1958},"Глибоке Занурення в Продуктивність","/javascript/react/tanstack-query/performance-deep-dive","03.javascript/04.react/04.tanstack-query/14.performance-deep-dive",{"title":1960,"icon":1875,"path":1961,"stem":1962,"children":1963},"React Router","/javascript/react/react-router","03.javascript/04.react/05.react-router/index",[1964,1966,1970,1974,1978,1982,1986,1990],{"title":1965,"path":1961,"stem":1962},"React Router: Навігаційна система сучасного вебу",{"title":1967,"path":1968,"stem":1969},"Налаштування та Базовий Роутинг","/javascript/react/react-router/setup-and-basic-routing","03.javascript/04.react/05.react-router/01.setup-and-basic-routing",{"title":1971,"path":1972,"stem":1973},"Динамічна Навігація","/javascript/react/react-router/navigation-and-links","03.javascript/04.react/05.react-router/02.navigation-and-links",{"title":1975,"path":1976,"stem":1977},"Вкладені Маршрути та Макети","/javascript/react/react-router/nested-routes-and-layouts","03.javascript/04.react/05.react-router/03.nested-routes-and-layouts",{"title":1979,"path":1980,"stem":1981},"Динамічні Маршрути та Параметри","/javascript/react/react-router/dynamic-routing","03.javascript/04.react/05.react-router/04.dynamic-routing",{"title":1983,"path":1984,"stem":1985},"Data APIs: Loaders та Actions","/javascript/react/react-router/data-loading","03.javascript/04.react/05.react-router/05.data-loading",{"title":1987,"path":1988,"stem":1989},"Просунуті Патерни","/javascript/react/react-router/advanced-patterns","03.javascript/04.react/05.react-router/06.advanced-patterns",{"title":1991,"path":1992,"stem":1993},"Legacy Routing: Компонентний підхід","/javascript/react/react-router/legacy-routing","03.javascript/04.react/05.react-router/07.legacy-routing",{"title":1995,"icon":132,"path":1996,"stem":1997,"children":1998},"Redux","/javascript/react/redux","03.javascript/04.react/06.redux/index",[1999,2001,2017,2046,2055,2076,2092,2121],{"title":2000,"path":1996,"stem":1997},"Redux: Еволюція управління станом",{"title":14,"icon":15,"path":2002,"stem":2003,"children":2004,"page":59},"/javascript/react/redux/fundamentals","03.javascript/04.react/06.redux/01.fundamentals",[2005,2009,2013],{"title":2006,"path":2007,"stem":2008},"Вступ до State Management","/javascript/react/redux/fundamentals/intro-state-management","03.javascript/04.react/06.redux/01.fundamentals/01.intro-state-management",{"title":2010,"path":2011,"stem":2012},"Філософія Redux та Три Принципи","/javascript/react/redux/fundamentals/redux-philosophy","03.javascript/04.react/06.redux/01.fundamentals/02.redux-philosophy",{"title":2014,"path":2015,"stem":2016},"Чисті функції та Іммутабельність","/javascript/react/redux/fundamentals/pure-functions-immutability","03.javascript/04.react/06.redux/01.fundamentals/03.pure-functions-immutability",{"title":2018,"icon":132,"path":2019,"stem":2020,"children":2021,"page":59},"Classic Redux","/javascript/react/redux/classic-redux","03.javascript/04.react/06.redux/02.classic-redux",[2022,2026,2030,2034,2038,2042],{"title":2023,"path":2024,"stem":2025},"Створення Store (Classic Redux)","/javascript/react/redux/classic-redux/store-setup","03.javascript/04.react/06.redux/02.classic-redux/01.store-setup",{"title":2027,"path":2028,"stem":2029},"Actions, Constants та Action Creators","/javascript/react/redux/classic-redux/actions-constants","03.javascript/04.react/06.redux/02.classic-redux/02.actions-constants",{"title":2031,"path":2032,"stem":2033},"Логіка Reducers","/javascript/react/redux/classic-redux/reducers","03.javascript/04.react/06.redux/02.classic-redux/03.reducers",{"title":2035,"path":2036,"stem":2037},"Комбінування Reducers (Root Reducer)","/javascript/react/redux/classic-redux/data-flow","03.javascript/04.react/06.redux/02.classic-redux/04.data-flow",{"title":2039,"path":2040,"stem":2041},"Підключення до React (React-Redux)","/javascript/react/redux/classic-redux/react-redux-connection","03.javascript/04.react/06.redux/02.classic-redux/05.react-redux-connection",{"title":2043,"path":2044,"stem":2045},"Middleware та Асинхронність (Redux Thunk)","/javascript/react/redux/classic-redux/middleware-thunk","03.javascript/04.react/06.redux/02.classic-redux/06.middleware-thunk",{"title":2047,"icon":132,"path":2048,"stem":2049,"children":2050,"page":59},"Transition To Rtk","/javascript/react/redux/transition-to-rtk","03.javascript/04.react/06.redux/03.transition-to-rtk",[2051],{"title":2052,"path":2053,"stem":2054},"Проблеми класичного Redux","/javascript/react/redux/transition-to-rtk/problems-with-classic","03.javascript/04.react/06.redux/03.transition-to-rtk/01.problems-with-classic",{"title":2056,"icon":132,"path":2057,"stem":2058,"children":2059,"page":59},"Redux Toolkit","/javascript/react/redux/redux-toolkit","03.javascript/04.react/06.redux/04.redux-toolkit",[2060,2064,2068,2072],{"title":2061,"path":2062,"stem":2063},"Налаштування Store з 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дружити","/java/pr2/impedance-mismatch","04.java/pr2/09.impedance-mismatch",{"title":2285,"path":2286,"stem":2287},"JDBC: Перший контакт із базою даних","/java/pr2/jdbc-fundamentals","04.java/pr2/10.jdbc-fundamentals",{"title":2289,"path":2290,"stem":2291},"Якість коду: Spotless, SpotBugs та SonarQube","/java/pr2/10a.code-quality","04.java/pr2/10a.code-quality",{"title":2293,"path":2294,"stem":2295},"Connection Pool: Патерн Object Pool для JDBC-з'єднань","/java/pr2/connection-pool","04.java/pr2/11.connection-pool",{"title":2297,"path":2298,"stem":2299},"Row Data Gateway: Об'єкт як обгортка рядка таблиці","/java/pr2/row-data-gateway","04.java/pr2/12.row-data-gateway",{"title":2301,"path":2302,"stem":2303},"Table Data Gateway: Фасад таблиці як архітектурний відступ","/java/pr2/table-data-gateway","04.java/pr2/13.table-data-gateway",{"title":2305,"path":2306,"stem":2307},"Repository + Data Mapper: Правильна шарова архітектура з JDBC","/java/pr2/repository-data-mapper","04.java/pr2/14.repository-data-mapper",{"title":2309,"path":2310,"stem":2311},"Identity Map: Кешування сутностей у рамках сесії","/java/pr2/identity-map","04.java/pr2/15.identity-map",{"title":2313,"path":2314,"stem":2315},"Unit of Work: Відстеження змін і координація JDBC-транзакцій","/java/pr2/unit-of-work","04.java/pr2/16.unit-of-work",{"title":2317,"path":2318,"stem":2319},"Strategy: Замінювані SQL-стратегії для підтримки різних СУБД","/java/pr2/strategy-sql","04.java/pr2/17.strategy-sql",{"title":2321,"path":2322,"stem":2323},"Proxy: Lazy Loading для One-To-Many колекцій","/java/pr2/proxy-lazy-loading","04.java/pr2/18.proxy-lazy-loading",{"title":2325,"path":2326,"stem":2327},"Generic Repository через Java Reflection: анотації та динамічний SQL","/java/pr2/generic-repository-reflection","04.java/pr2/19.generic-repository-reflection",{"title":2329,"path":2330,"stem":2331},"Specification Pattern: Композиція бізнес-правил для складних 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БД","/databases/intro/logical-schema","06.databases/01.intro/04.logical-schema",{"title":2381,"path":2382,"stem":2383},"Класифікація таблиць","/databases/intro/table-classification","06.databases/01.intro/05.table-classification",{"title":2385,"path":2386,"stem":2387},"PlantUML для баз даних","/databases/intro/plantuml-diagrams","06.databases/01.intro/06.plantuml-diagrams",{"title":2389,"icon":2354,"path":2390,"stem":2391,"children":2392,"page":59},"MS SQL Server Start","/databases/ms-sql-server-start","06.databases/02.ms-sql-server-start",[2393,2397,2403,2407],{"title":2394,"path":2395,"stem":2396},"Типи даних у MS SQL Server","/databases/ms-sql-server-start/data-types","06.databases/02.ms-sql-server-start/01.data-types",{"title":2398,"path":2399,"stem":2400,"children":2401},"Індекси у MS SQL 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TABLE)","/databases/sql/ddl-create-table","06.databases/03.sql/01.ddl-create-table",{"title":2425,"path":2426,"stem":2427},"DDL - Зміна та видалення таблиць (ALTER, DROP)","/databases/sql/ddl-alter-drop-table","06.databases/03.sql/02.ddl-alter-drop-table",{"title":2429,"path":2430,"stem":2431},"SELECT запити - Основи","/databases/sql/select-queries-fundamentals","06.databases/03.sql/03.select-queries-fundamentals",{"title":2433,"path":2434,"stem":2435},"SELECT запити - Розширені можливості","/databases/sql/select-queries-advanced","06.databases/03.sql/04.select-queries-advanced",{"title":2437,"path":2438,"stem":2439},"INSERT запити - Додавання даних","/databases/sql/insert-queries","06.databases/03.sql/05.insert-queries",{"title":2441,"path":2442,"stem":2443},"UPDATE та DELETE запити","/databases/sql/update-delete-queries","06.databases/03.sql/06.update-delete-queries",{"title":2445,"path":2446,"stem":2447},"Транзакції в SQL","/databases/sql/transactions","06.databases/03.sql/07.transactions",{"title":2449,"icon":2354,"path":2450,"stem":2451,"children":2452,"page":59},"Multi Table Databases","/databases/multi-table-databases","06.databases/04.multi-table-databases",[2453,2457,2461,2465,2469,2473],{"title":2454,"path":2455,"stem":2456},"Зв'язки та нормалізація БД","/databases/multi-table-databases/relationships-and-normalization","06.databases/04.multi-table-databases/00.relationships-and-normalization",{"title":2458,"path":2459,"stem":2460},"INNER JOIN - З'єднання таблиць","/databases/multi-table-databases/inner-join","06.databases/04.multi-table-databases/01.inner-join",{"title":2462,"path":2463,"stem":2464},"OUTER JOINs - LEFT, RIGHT, FULL","/databases/multi-table-databases/outer-joins","06.databases/04.multi-table-databases/02.outer-joins",{"title":2466,"path":2467,"stem":2468},"CROSS та SELF JOINs","/databases/multi-table-databases/cross-self-joins","06.databases/04.multi-table-databases/03.cross-self-joins",{"title":2470,"path":2471,"stem":2472},"Підзапити (Subqueries)","/databases/multi-table-databases/subqueries","06.databases/04.multi-table-databases/04.subqueries",{"title":2474,"path":2475,"stem":2476},"Агрегації з JOIN","/databases/multi-table-databases/aggregations-with-joins","06.databases/04.multi-table-databases/05.aggregations-with-joins",{"title":2478,"icon":2479,"path":2480,"stem":2481,"children":2482,"page":59},"Aggregate Functions","i-lucide-calculator","/databases/aggregate-functions","06.databases/05.aggregate-functions",[2483,2487,2491],{"title":2484,"path":2485,"stem":2486},"Функції агрегування в MS SQL Server","/databases/aggregate-functions/introduction-aggregate-functions","06.databases/05.aggregate-functions/01.introduction-aggregate-functions",{"title":2488,"path":2489,"stem":2490},"Групування даних в MS SQL Server","/databases/aggregate-functions/grouping-data","06.databases/05.aggregate-functions/02.grouping-data",{"title":2492,"path":2493,"stem":2494},"Підзапити з агрегатними функціями","/databases/aggregate-functions/subqueries-aggregates","06.databases/05.aggregate-functions/03.subqueries-aggregates",{"title":2496,"icon":2497,"path":2498,"stem":2499,"children":2500,"page":59},"Тригери та зберігаємі процедури","i-lucide-database-zap","/databases/triggers-stored-procedures","06.databases/07.triggers-stored-procedures",[2501,2505,2509,2513,2517,2521,2525],{"title":2502,"path":2503,"stem":2504},"DML-тригери","/databases/triggers-stored-procedures/dml-triggers","06.databases/07.triggers-stored-procedures/01.dml-triggers",{"title":2506,"path":2507,"stem":2508},"DDL-тригери","/databases/triggers-stored-procedures/ddl-triggers","06.databases/07.triggers-stored-procedures/02.ddl-triggers",{"title":2510,"path":2511,"stem":2512},"Transact-SQL 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навіщо?","/tools/docker/docker-what-and-why","07.tools/01.docker/02.docker-what-and-why",{"title":2582,"path":2583,"stem":2584},"Архітектура Docker Engine","/tools/docker/docker-architecture","07.tools/01.docker/03.docker-architecture",{"title":2586,"path":2587,"stem":2588},"Встановлення Docker","/tools/docker/installation","07.tools/01.docker/04.installation",{"title":2590,"path":2591,"stem":2592},"Перший контейнер — docker run","/tools/docker/first-container","07.tools/01.docker/05.first-container",{"title":2594,"path":2595,"stem":2596},"Життєвий цикл контейнера","/tools/docker/container-lifecycle","07.tools/01.docker/06.container-lifecycle",{"title":2598,"path":2599,"stem":2600},"Docker Images — фундаментальні концепції","/tools/docker/docker-images-fundamentals","07.tools/01.docker/07.docker-images-fundamentals",{"title":2602,"path":2603,"stem":2604},"Dockerfile — основи","/tools/docker/dockerfile-basics","07.tools/01.docker/08.dockerfile-basics",{"title":2606,"path":2607,"stem":2608},"Dockerfile — просунуті техніки","/tools/docker/dockerfile-advanced","07.tools/01.docker/09.dockerfile-advanced",{"title":2610,"path":2611,"stem":2612},"Build Context та кешування шарів","/tools/docker/build-context-and-cache","07.tools/01.docker/10.build-context-and-cache",{"title":2614,"path":2615,"stem":2616},"Реєстри Docker-образів","/tools/docker/image-registries","07.tools/01.docker/11.image-registries",{"title":2618,"path":2619,"stem":2620},"Контейнеризація .NET додатків","/tools/docker/dotnet-containerization","07.tools/01.docker/12.dotnet-containerization",{"title":2622,"path":2623,"stem":2624},"Томи та збереження даних","/tools/docker/volumes-and-data","07.tools/01.docker/13.volumes-and-data",{"title":2626,"path":2627,"stem":2628},"Основи мережі в Docker","/tools/docker/networking-basics","07.tools/01.docker/14.networking-basics",{"title":2630,"path":2631,"stem":2632},"Змінні оточення та конфігурація","/tools/docker/environment-and-configuration","07.tools/01.docker/15.environment-and-configuration",{"title":2634,"path":2635,"stem":2636},"Docker Compose — оркестрація контейнерів","/tools/docker/docker-compose-basics","07.tools/01.docker/16.docker-compose-basics",{"title":2638,"path":2639,"stem":2640},"Docker Compose — Multi-Service застосунки","/tools/docker/compose-multi-service","07.tools/01.docker/17.compose-multi-service",{"title":2642,"icon":2643,"path":2644,"stem":2645,"children":2646,"page":59},"Software Engineering","i-lucide-code-2","/software-engineering","09.software-engineering",[2647,2651,2655,2659,2663,2667,2671,2675,2679,2683,2687],{"title":2648,"path":2649,"stem":2650},"1. 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Архітектурні Патерни","/ddd/architectural-patterns","10.ddd/08.architectural-patterns",{"title":2729,"path":2730,"stem":2731},"Глава 9. Патерни Взаємодії","/ddd/interaction-patterns","10.ddd/09.interaction-patterns",{"title":2733,"path":2734,"stem":2735},"Глава 10. Проектні Евристики","/ddd/design-heuristics","10.ddd/10.design-heuristics",{"title":2737,"path":2738,"stem":2739},"Глава 11. Еволюція Проектних Рішень","/ddd/evolution-of-design-decisions","10.ddd/11.evolution-of-design-decisions",{"title":2741,"path":2742,"stem":2743},"Глава 12. EventStorming","/ddd/event-storming","10.ddd/12.event-storming",{"title":2745,"path":2746,"stem":2747},"Глава 13. DDD на Практиці","/ddd/ddd-in-practice","10.ddd/13.ddd-in-practice",{"title":2749,"icon":2750,"path":2751,"stem":2752,"children":2753,"page":59},"Media Streaming","i-lucide-video","/media-streaming","11.media-streaming",[2754,2758,2762,2766,2770,2774,2778],{"title":2755,"path":2756,"stem":2757},"01. 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Селектори та специфічність","/html-css/css-intro-selectors","12.html-css/09.css-intro-selectors",{"title":2825,"path":2826,"stem":2827},"Блокова модель CSS. Відступи. Box Sizing","/html-css/css-box-model","12.html-css/10.css-box-model",{"title":2829,"path":2830,"stem":2831},"Розміри у CSS: повний довідник одиниць і ключових слів","/html-css/10a.css-sizing","12.html-css/10a.css-sizing",{"title":2833,"path":2834,"stem":2835},"Типографіка в CSS. Шрифти та текст","/html-css/css-typography","12.html-css/11.css-typography",{"title":2837,"path":2838,"stem":2839},"Кольори та фони в CSS","/html-css/css-colors-backgrounds","12.html-css/12.css-colors-backgrounds",{"title":2841,"path":2842,"stem":2843},"Тіні та фільтри в CSS","/html-css/12b.css-shadows-filters","12.html-css/12b.css-shadows-filters",{"title":2845,"path":2846,"stem":2847},"CSS Flexbox: Фундамент гнучких макетів","/html-css/css-flexbox-fundamentals","12.html-css/13.css-flexbox-fundamentals",{"title":2849,"path":2850,"stem":2851},"CSS Flexbox: Вирівнювання та Позиціонування","/html-css/css-flexbox-alignment-sizing-and-patterns","12.html-css/14.css-flexbox-alignment-sizing-and-patterns",{"title":2853,"path":2854,"stem":2855},"CSS Grid. Двовимірний макет. Частина 1","/html-css/css-layout-grid","12.html-css/15.css-layout-grid",{"title":2857,"path":2858,"stem":2859},"CSS Grid. Двовимірний макет. Частина 2","/html-css/css-layout-grid-advanced","12.html-css/16.css-layout-grid-advanced",{"title":2861,"path":2862,"stem":2863},"Позиціонування в CSS. Z-index. Stacking Context","/html-css/css-positioning","12.html-css/17.css-positioning",{"title":2865,"path":2866,"stem":2867},"CSS Анімації та Переходи","/html-css/css-animations-transitions","12.html-css/18.css-animations-transitions",{"title":2869,"path":2870,"stem":2871},"Адаптивний дизайн. Media Queries. Частина 1","/html-css/css-responsive-media-queries","12.html-css/19.css-responsive-media-queries",{"title":2873,"path":2874,"stem":2875},"Адаптивний дизайн. Частина 2: clamp(), Container Queries, @layer","/html-css/css-responsive-advanced","12.html-css/20.css-responsive-advanced",{"title":2877,"path":2878,"stem":2879},"CSS Custom Properties. Методології. Сучасний CSS","/html-css/css-variables-methodologies","12.html-css/21.css-variables-methodologies",{"title":2881,"path":2882,"stem":2883},"Сучасний CSS 2023–2025: Нові можливості","/html-css/css-modern-features","12.html-css/22.css-modern-features",{"title":2885,"path":2886,"stem":2887},"CSS Nesting, @layer, @scope та @property: нативний препроцесор","/html-css/22a.css-nesting-modern-syntax","12.html-css/22a.css-nesting-modern-syntax",{"title":2889,"path":2890,"stem":2891},"CSS для форм та інтерактивних станів","/html-css/css-forms-interactive-states","12.html-css/23.css-forms-interactive-states",{"title":2893,"path":2894,"stem":2895},"Доступність у CSS (CSS Accessibility)","/html-css/css-accessibility","12.html-css/24.css-accessibility",{"title":2897,"path":2898,"stem":2899},"CSS-функції та сучасні sizing primitives","/html-css/css-functions-sizing","12.html-css/25.css-functions-sizing",{"title":2901,"path":2902,"stem":2903},"Rendering Pipeline і CSS Performance","/html-css/css-rendering-performance","12.html-css/26.css-rendering-performance",{"title":2905,"path":2906,"stem":2907},"CSS Best Practices: типові ситуації та правильні рішення","/html-css/css-best-practices","12.html-css/27.css-best-practices",{"title":2909,"path":2910,"stem":2911,"children":2912,"page":59},"Tailwind","/tailwind","21.tailwind",[2913,2917,2921,2925,2929,2933,2937,2941],{"title":2914,"path":2915,"stem":2916},"Що таке Tailwind CSS і навіщо він потрібен","/tailwind/tailwind-intro-philosophy","21.tailwind/01.tailwind-intro-philosophy",{"title":2918,"path":2919,"stem":2920},"Встановлення та налаштування Tailwind CSS v4","/tailwind/tailwind-installation-setup","21.tailwind/02.tailwind-installation-setup",{"title":2922,"path":2923,"stem":2924},"Utility-класи: основи та система Tailwind","/tailwind/tailwind-utility-classes-core","21.tailwind/03.tailwind-utility-classes-core",{"title":2926,"path":2927,"stem":2928},"Layout: Flexbox та Grid через Tailwind","/tailwind/tailwind-flexbox-grid","21.tailwind/04.tailwind-flexbox-grid",{"title":2930,"path":2931,"stem":2932},"Кастомізація теми через @theme у Tailwind v4","/tailwind/tailwind-theme-customization","21.tailwind/05.tailwind-theme-customization",{"title":2934,"path":2935,"stem":2936},"Варіанти: hover, focus, responsive, dark mode та нові v4","/tailwind/tailwind-variants-states","21.tailwind/06.tailwind-variants-states",{"title":2938,"path":2939,"stem":2940},"Типографіка та система кольорів у Tailwind v4","/tailwind/tailwind-typography-colors","21.tailwind/07.tailwind-typography-colors",{"title":2942,"path":2943,"stem":2944},"Компоненти та повторюваність: @apply, @utility та патерни","/tailwind/tailwind-components-patterns","21.tailwind/08.tailwind-components-patterns",{"title":2946,"path":2947,"stem":2948},"Showcase Компонентів kostyl.dev","/test-new-components","98.test-new-components",{"id":2950,"title":2285,"body":2951,"description":11253,"extension":11254,"links":11255,"meta":11256,"navigation":3054,"path":2286,"seo":11257,"stem":2287,"__hash__":11258},"docs/04.java/pr2/10.jdbc-fundamentals.md",{"type":2952,"value":2953,"toc":11235},"minimark",[2954,2958,2963,2967,2979,2985,2993,2997,3000,3080,3083,3106,3128,3144,3174,3179,3182,3372,3375,3415,3418,3422,3428,3532,3539,4517,4522,4584,4586,4590,4593,5702,5712,5714,5718,5722,5729,5760,5771,5803,5810,5853,5860,5864,5876,6061,6071,6073,6077,6092,6099,6105,6114,6244,6260,6262,6266,6287,6296,6659,6756,6776,6778,6782,6792,6847,6857,6868,7121,7123,7127,7138,9637,9642,9727,9729,9733,9742,10526,10529,10535,10537,10541,10544,10642,10645,10706,10708,10712,10829,10992,11231],[2955,2956,2285],"h1",{"id":2957},"jdbc-перший-контакт-із-базою-даних",[2959,2960,2962],"h2",{"id":2961},"вступ-найближчий-шлях-до-sql-з-java","Вступ: Найближчий шлях до SQL з Java",[2964,2965,2966],"p",{},"У попередній статті ми дослідили природу Impedance Mismatch — концептуального розриву між об'єктною та реляційною моделями. Тепер ми переходимо до практики: написати перший Java-код, що реально читає і записує дані у нашу H2-базу аудіоплатформи.",[2964,2968,2969,2970,2974,2975,2978],{},"Найпряміший шлях від Java до SQL — це ",[2971,2972,2973],"strong",{},"JDBC"," (Java Database Connectivity). JDBC — це не бібліотека, яку потрібно завантажити окремо, це ",[2971,2976,2977],{},"стандартний API",", що входить до складу Java SE з версії 1.1 (1997 рік). Саме на JDBC побудовані всі більш високорівневі абстракції: Hibernate використовує JDBC для фактичного виконання SQL, Spring JDBC Template обгортає JDBC у зручні утиліти, jOOQ генерує типобезпечні запити, але також виконує їх через JDBC.",[2980,2981,2982],"blockquote",{},[2964,2983,2984],{},"Розуміння JDBC — це розуміння фундаменту. Розробник, що знає JDBC, здатен прочитати будь-який стектрейс Hibernate, зрозуміти будь-яку проблему з підключенням і, за необхідності, обійти ORM там, де він заважає.",[2964,2986,2987,2988,2992],{},"Ця стаття будується навколо простого але реального сценарію: ми реалізуємо перший CRUD для таблиці ",[2989,2990,2991],"code",{},"authors"," нашої аудіоплатформи. Почнемо з найпростішого можливого рішення, виявимо його критичні вади і покроково усунемо кожну з них.",[2959,2994,2996],{"id":2995},"архітектура-jdbc-від-drivermanager-до-resultset","Архітектура JDBC: від DriverManager до ResultSet",[2964,2998,2999],{},"Перш ніж писати код, важливо зрозуміти архітектуру JDBC. Вона складається з кількох ключових абстракцій, що утворюють чіткий ланцюг від програми до бази даних.",[3001,3002,3003],"mermaid",{},[3004,3005,3009],"pre",{"className":3006,"code":3007,"language":3001,"meta":3008,"style":3008},"language-mermaid shiki shiki-themes light-plus dark-plus dark-plus","graph TD\n    A[Java-програма] --> B[DriverManager]\n    B --> C[Connection\u003Cbr/>з'єднання з БД]\n    C --> D[Statement /\u003Cbr/>PreparedStatement]\n    D --> E[ResultSet\u003Cbr/>результати запиту]\n    C --> F[DatabaseMetaData\u003Cbr/>метадані схеми]\n\n    style A fill:#3b82f6,stroke:#1d4ed8,color:#ffffff\n    style C fill:#f59e0b,stroke:#b45309,color:#ffffff\n    style D fill:#22c55e,stroke:#15803d,color:#ffffff\n    style E fill:#64748b,stroke:#334155,color:#ffffff\n","",[2989,3010,3011,3019,3025,3031,3037,3043,3049,3056,3062,3068,3074],{"__ignoreMap":3008},[3012,3013,3016],"span",{"class":3014,"line":3015},"line",1,[3012,3017,3018],{},"graph TD\n",[3012,3020,3022],{"class":3014,"line":3021},2,[3012,3023,3024],{},"    A[Java-програма] --> B[DriverManager]\n",[3012,3026,3028],{"class":3014,"line":3027},3,[3012,3029,3030],{},"    B --> C[Connection\u003Cbr/>з'єднання з БД]\n",[3012,3032,3034],{"class":3014,"line":3033},4,[3012,3035,3036],{},"    C --> D[Statement /\u003Cbr/>PreparedStatement]\n",[3012,3038,3040],{"class":3014,"line":3039},5,[3012,3041,3042],{},"    D --> E[ResultSet\u003Cbr/>результати запиту]\n",[3012,3044,3046],{"class":3014,"line":3045},6,[3012,3047,3048],{},"    C --> F[DatabaseMetaData\u003Cbr/>метадані схеми]\n",[3012,3050,3052],{"class":3014,"line":3051},7,[3012,3053,3055],{"emptyLinePlaceholder":3054},true,"\n",[3012,3057,3059],{"class":3014,"line":3058},8,[3012,3060,3061],{},"    style A fill:#3b82f6,stroke:#1d4ed8,color:#ffffff\n",[3012,3063,3065],{"class":3014,"line":3064},9,[3012,3066,3067],{},"    style C fill:#f59e0b,stroke:#b45309,color:#ffffff\n",[3012,3069,3071],{"class":3014,"line":3070},10,[3012,3072,3073],{},"    style D fill:#22c55e,stroke:#15803d,color:#ffffff\n",[3012,3075,3077],{"class":3014,"line":3076},11,[3012,3078,3079],{},"    style E fill:#64748b,stroke:#334155,color:#ffffff\n",[2964,3081,3082],{},"Розглянемо кожну ланку ланцюга:",[2964,3084,3085,3090,3091,3094,3095,3098,3099,3098,3102,3105],{},[2971,3086,3087],{},[2989,3088,3089],{},"DriverManager"," — статичний клас-фабрика, що керує зареєстрованими JDBC-драйверами. При виклику ",[2989,3092,3093],{},"DriverManager.getConnection(url, user, password)"," він визначає потрібний драйвер за префіксом URL (",[2989,3096,3097],{},"jdbc:h2:",", ",[2989,3100,3101],{},"jdbc:postgresql:",[2989,3103,3104],{},"jdbc:mysql:",") і делегує йому створення з'єднання.",[2964,3107,3108,3113,3114,3116,3117,3120,3121,3124,3125,3127],{},[2971,3109,3110],{},[2989,3111,3112],{},"Connection"," — представляє одне фізичне з'єднання з базою даних. Це найдорожчий ресурс у JDBC: встановлення TCP-з'єднання, аутентифікація, узгодження параметрів сесії займають десятки мілісекунд. ",[2989,3115,3112],{}," є ",[2989,3118,3119],{},"AutoCloseable"," і ",[2971,3122,3123],{},"обов'язково"," має бути закритий після використання. Саме навколо ефективного управління ",[2989,3126,3112],{}," побудований патерн Connection Pool (стаття 11).",[2964,3129,3130,3135,3136,3139,3140,3143],{},[2971,3131,3132],{},[2989,3133,3134],{},"PreparedStatement"," — попередньо скомпільований SQL-запит із параметрами-заглушками (",[2989,3137,3138],{},"?","). На відміну від ",[2989,3141,3142],{},"Statement",", він захищає від SQL-ін'єкцій та ефективніший при повторному виконанні одного і того ж запиту з різними параметрами.",[2964,3145,3146,3151,3152,3155,3156,3159,3160,3163,3164,3098,3167,3098,3170,3173],{},[2971,3147,3148],{},[2989,3149,3150],{},"ResultSet"," — курсор, що вказує на рядки результату запиту. Початково він позиціонується ",[2971,3153,3154],{},"перед"," першим рядком. Методом ",[2989,3157,3158],{},"next()"," ми переміщуємо курсор на наступний рядок і отримуємо ",[2989,3161,3162],{},"true",", доки рядки є. Читання відбувається через типізовані методи: ",[2989,3165,3166],{},"getString()",[2989,3168,3169],{},"getInt()",[2989,3171,3172],{},"getObject()",".",[3175,3176,3178],"h3",{"id":3177},"налаштування-проєкту","Налаштування проєкту",[2964,3180,3181],{},"Для роботи нам потрібні дві залежності Maven: H2 (вбудована база даних) та Flyway (для застосування міграцій, які ми написали у статті 06):",[3004,3183,3187],{"className":3184,"code":3185,"language":3186,"meta":3008,"style":3008},"language-xml shiki shiki-themes light-plus dark-plus dark-plus","\u003Cdependencies>\n    \u003C!-- H2 — вбудована СУБД для розробки та навчання -->\n    \u003Cdependency>\n        \u003CgroupId>com.h2database\u003C/groupId>\n        \u003CartifactId>h2\u003C/artifactId>\n        \u003Cversion>2.3.232\u003C/version>\n    \u003C/dependency>\n\n    \u003C!-- Flyway — автоматичне застосування міграцій при старті -->\n    \u003Cdependency>\n        \u003CgroupId>org.flywaydb\u003C/groupId>\n        \u003CartifactId>flyway-core\u003C/artifactId>\n        \u003Cversion>10.15.0\u003C/version>\n    \u003C/dependency>\n\u003C/dependencies>\n","xml",[2989,3188,3189,3202,3208,3218,3240,3257,3275,3284,3288,3293,3301,3318,3336,3354,3363],{"__ignoreMap":3008},[3012,3190,3191,3195,3199],{"class":3014,"line":3015},[3012,3192,3194],{"class":3193},"s0P7L","\u003C",[3012,3196,3198],{"class":3197},"sKtos","dependencies",[3012,3200,3201],{"class":3193},">\n",[3012,3203,3204],{"class":3014,"line":3021},[3012,3205,3207],{"class":3206},"spJ8K","    \u003C!-- H2 — вбудована СУБД для розробки та навчання -->\n",[3012,3209,3210,3213,3216],{"class":3014,"line":3027},[3012,3211,3212],{"class":3193},"    \u003C",[3012,3214,3215],{"class":3197},"dependency",[3012,3217,3201],{"class":3193},[3012,3219,3220,3223,3226,3229,3233,3236,3238],{"class":3014,"line":3033},[3012,3221,3222],{"class":3193},"        \u003C",[3012,3224,3225],{"class":3197},"groupId",[3012,3227,3228],{"class":3193},">",[3012,3230,3232],{"class":3231},"sHH4Y","com.h2database",[3012,3234,3235],{"class":3193},"\u003C/",[3012,3237,3225],{"class":3197},[3012,3239,3201],{"class":3193},[3012,3241,3242,3244,3247,3249,3251,3253,3255],{"class":3014,"line":3039},[3012,3243,3222],{"class":3193},[3012,3245,3246],{"class":3197},"artifactId",[3012,3248,3228],{"class":3193},[3012,3250,2959],{"class":3231},[3012,3252,3235],{"class":3193},[3012,3254,3246],{"class":3197},[3012,3256,3201],{"class":3193},[3012,3258,3259,3261,3264,3266,3269,3271,3273],{"class":3014,"line":3045},[3012,3260,3222],{"class":3193},[3012,3262,3263],{"class":3197},"version",[3012,3265,3228],{"class":3193},[3012,3267,3268],{"class":3231},"2.3.232",[3012,3270,3235],{"class":3193},[3012,3272,3263],{"class":3197},[3012,3274,3201],{"class":3193},[3012,3276,3277,3280,3282],{"class":3014,"line":3051},[3012,3278,3279],{"class":3193},"    \u003C/",[3012,3281,3215],{"class":3197},[3012,3283,3201],{"class":3193},[3012,3285,3286],{"class":3014,"line":3058},[3012,3287,3055],{"emptyLinePlaceholder":3054},[3012,3289,3290],{"class":3014,"line":3064},[3012,3291,3292],{"class":3206},"    \u003C!-- Flyway — автоматичне застосування міграцій при старті -->\n",[3012,3294,3295,3297,3299],{"class":3014,"line":3070},[3012,3296,3212],{"class":3193},[3012,3298,3215],{"class":3197},[3012,3300,3201],{"class":3193},[3012,3302,3303,3305,3307,3309,3312,3314,3316],{"class":3014,"line":3076},[3012,3304,3222],{"class":3193},[3012,3306,3225],{"class":3197},[3012,3308,3228],{"class":3193},[3012,3310,3311],{"class":3231},"org.flywaydb",[3012,3313,3235],{"class":3193},[3012,3315,3225],{"class":3197},[3012,3317,3201],{"class":3193},[3012,3319,3321,3323,3325,3327,3330,3332,3334],{"class":3014,"line":3320},12,[3012,3322,3222],{"class":3193},[3012,3324,3246],{"class":3197},[3012,3326,3228],{"class":3193},[3012,3328,3329],{"class":3231},"flyway-core",[3012,3331,3235],{"class":3193},[3012,3333,3246],{"class":3197},[3012,3335,3201],{"class":3193},[3012,3337,3339,3341,3343,3345,3348,3350,3352],{"class":3014,"line":3338},13,[3012,3340,3222],{"class":3193},[3012,3342,3263],{"class":3197},[3012,3344,3228],{"class":3193},[3012,3346,3347],{"class":3231},"10.15.0",[3012,3349,3235],{"class":3193},[3012,3351,3263],{"class":3197},[3012,3353,3201],{"class":3193},[3012,3355,3357,3359,3361],{"class":3014,"line":3356},14,[3012,3358,3279],{"class":3193},[3012,3360,3215],{"class":3197},[3012,3362,3201],{"class":3193},[3012,3364,3366,3368,3370],{"class":3014,"line":3365},15,[3012,3367,3235],{"class":3193},[3012,3369,3198],{"class":3197},[3012,3371,3201],{"class":3193},[2964,3373,3374],{},"Структура проєкту, з якою ми будемо працювати впродовж усієї серії:",[3376,3377,3378,3387,3394,3401,3408],"code-tree",{},[3004,3379,3385],{"className":3380,"code":3382,"filename":3383,"language":3384,"meta":3008},[3381],"language-text","// Доменна модель\n","src/main/java/com/example/audiobook/domain/Author.java","text",[2989,3386,3382],{"__ignoreMap":3008},[3004,3388,3392],{"className":3389,"code":3390,"filename":3391,"language":3384,"meta":3008},[3381],"// Перша, \"наївна\" реалізація DAO\n","src/main/java/com/example/audiobook/dao/AuthorNaiveDao.java",[2989,3393,3390],{"__ignoreMap":3008},[3004,3395,3399],{"className":3396,"code":3397,"filename":3398,"language":3384,"meta":3008},[3381],"// Централізоване управління з'єднаннями\n","src/main/java/com/example/audiobook/db/ConnectionManager.java",[2989,3400,3397],{"__ignoreMap":3008},[3004,3402,3406],{"className":3403,"code":3404,"filename":3405,"language":3384,"meta":3008},[3381],"// Міграція з попередньої статті\n","src/main/resources/db/migration/V1__create_enum_and_authors.sql",[2989,3407,3404],{"__ignoreMap":3008},[3004,3409,3413],{"className":3410,"code":3411,"filename":3412,"language":3384,"meta":3008},[3381],"// Точка входу\n","src/main/java/com/example/audiobook/Main.java",[2989,3414,3411],{"__ignoreMap":3008},[3416,3417],"hr",{},[2959,3419,3421],{"id":3420},"доменна-модель-клас-author","Доменна модель: клас Author",[2964,3423,3424,3425,3427],{},"Перед написанням DAO-коду визначимо доменну модель. Відповідно до таблиці ",[2989,3426,2991],{}," у нашій схемі:",[3004,3429,3433],{"className":3430,"code":3431,"language":3432,"meta":3008,"style":3008},"language-sql shiki shiki-themes light-plus dark-plus dark-plus","CREATE TABLE authors (\n    id         UUID          PRIMARY KEY,\n    first_name VARCHAR(64)   NOT NULL,\n    last_name  VARCHAR(64)   NOT NULL,\n    bio        TEXT,\n    image_path VARCHAR(2048)\n);\n","sql",[2989,3434,3435,3451,3462,3485,3502,3512,3527],{"__ignoreMap":3008},[3012,3436,3437,3441,3444,3448],{"class":3014,"line":3015},[3012,3438,3440],{"class":3439},"su1O8","CREATE",[3012,3442,3443],{"class":3439}," TABLE",[3012,3445,3447],{"class":3446},"s8Opu"," authors",[3012,3449,3450],{"class":3231}," (\n",[3012,3452,3453,3456,3459],{"class":3014,"line":3021},[3012,3454,3455],{"class":3231},"    id         UUID          ",[3012,3457,3458],{"class":3439},"PRIMARY KEY",[3012,3460,3461],{"class":3231},",\n",[3012,3463,3464,3467,3470,3473,3477,3480,3483],{"class":3014,"line":3027},[3012,3465,3466],{"class":3231},"    first_name ",[3012,3468,3469],{"class":3439},"VARCHAR",[3012,3471,3472],{"class":3231},"(",[3012,3474,3476],{"class":3475},"sJj4R","64",[3012,3478,3479],{"class":3231},")   ",[3012,3481,3482],{"class":3439},"NOT NULL",[3012,3484,3461],{"class":3231},[3012,3486,3487,3490,3492,3494,3496,3498,3500],{"class":3014,"line":3033},[3012,3488,3489],{"class":3231},"    last_name  ",[3012,3491,3469],{"class":3439},[3012,3493,3472],{"class":3231},[3012,3495,3476],{"class":3475},[3012,3497,3479],{"class":3231},[3012,3499,3482],{"class":3439},[3012,3501,3461],{"class":3231},[3012,3503,3504,3507,3510],{"class":3014,"line":3039},[3012,3505,3506],{"class":3231},"    bio        ",[3012,3508,3509],{"class":3439},"TEXT",[3012,3511,3461],{"class":3231},[3012,3513,3514,3517,3519,3521,3524],{"class":3014,"line":3045},[3012,3515,3516],{"class":3231},"    image_path ",[3012,3518,3469],{"class":3439},[3012,3520,3472],{"class":3231},[3012,3522,3523],{"class":3475},"2048",[3012,3525,3526],{"class":3231},")\n",[3012,3528,3529],{"class":3014,"line":3051},[3012,3530,3531],{"class":3231},");\n",[2964,3533,3534,3535,3538],{},"Java-клас ",[2989,3536,3537],{},"Author"," — чиста доменна модель без жодних залежностей від JDBC:",[3004,3540,3545],{"className":3541,"code":3542,"language":3543,"meta":3544,"style":3008},"language-java shiki shiki-themes light-plus dark-plus dark-plus","package com.example.audiobook.domain;\n\nimport java.util.Objects;\nimport java.util.UUID;\n\n/**\n * Доменна модель автора аудіокниги.\n * Клас не містить жодної залежності від JDBC, SQL або будь-якої\n * бібліотеки персистентності — це принципова вимога архітектури.\n */\npublic class Author {\n\n    private final UUID id;\n    private String firstName;\n    private String lastName;\n    private String bio;\n    private String imagePath;\n\n    /**\n     * Конструктор для створення нового автора.\n     * ID генерується автоматично — клієнтський код не повинен\n     * піклуватися про генерацію ідентифікаторів.\n     */\n    public Author(String firstName, String lastName) {\n        this.id = UUID.randomUUID();\n        this.firstName = firstName;\n        this.lastName = lastName;\n    }\n\n    /**\n     * Конструктор для відновлення автора із сховища.\n     * Використовується виключно DAO/Repository при читанні з БД.\n     * ID передається явно — він вже існує у базі даних.\n     */\n    public Author(UUID id, String firstName, String lastName,\n                  String bio, String imagePath) {\n        this.id = id;\n        this.firstName = firstName;\n        this.lastName = lastName;\n        this.bio = bio;\n        this.imagePath = imagePath;\n    }\n\n    // --- Бізнес-методи ---\n\n    /** Повертає повне ім'я автора у форматі \"Прізвище Ім'я\". */\n    public String fullName() {\n        return lastName + \" \" + firstName;\n    }\n\n    /** Перевіряє, чи заповнена біографія автора. */\n    public boolean hasBio() {\n        return bio != null && !bio.isBlank();\n    }\n\n    // --- Геттери та сеттери ---\n    public UUID getId()          { return id; }\n    public String getFirstName() { return firstName; }\n    public String getLastName()  { return lastName; }\n    public String getBio()       { return bio; }\n    public String getImagePath() { return imagePath; }\n\n    public void setFirstName(String firstName) { this.firstName = firstName; }\n    public void setLastName(String lastName)   { this.lastName = lastName; }\n    public void setBio(String bio)             { this.bio = bio; }\n    public void setImagePath(String imagePath) { this.imagePath = imagePath; }\n\n    /**\n     * Рівність визначається виключно за первинним ключем —\n     * узгодження з реляційною моделлю (стаття 09, Розбіжність 3).\n     */\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (!(o instanceof Author other)) return false;\n        return id != null && id.equals(other.id);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hashCode(id);\n    }\n\n    @Override\n    public String toString() {\n        return \"Author{id=\" + id + \", name='\" + fullName() + \"'}\";\n    }\n}\n","java","showLineNumbers",[2989,3546,3547,3555,3559,3567,3574,3578,3583,3588,3593,3598,3603,3618,3622,3640,3652,3663,3675,3687,3692,3698,3704,3710,3716,3722,3746,3771,3784,3797,3803,3808,3813,3819,3825,3831,3836,3863,3879,3891,3902,3913,3926,3939,3944,3949,3955,3960,3966,3979,3996,4001,4006,4012,4025,4048,4053,4058,4064,4083,4101,4119,4137,4154,4159,4189,4217,4245,4272,4277,4282,4288,4294,4299,4308,4328,4349,4372,4403,4408,4413,4420,4433,4449,4454,4459,4466,4478,4506,4511],{"__ignoreMap":3008},[3012,3548,3549,3552],{"class":3014,"line":3015},[3012,3550,3551],{"class":3439},"package",[3012,3553,3554],{"class":3231}," com.example.audiobook.domain;\n",[3012,3556,3557],{"class":3014,"line":3021},[3012,3558,3055],{"emptyLinePlaceholder":3054},[3012,3560,3561,3564],{"class":3014,"line":3027},[3012,3562,3563],{"class":3439},"import",[3012,3565,3566],{"class":3231}," java.util.Objects;\n",[3012,3568,3569,3571],{"class":3014,"line":3033},[3012,3570,3563],{"class":3439},[3012,3572,3573],{"class":3231}," java.util.UUID;\n",[3012,3575,3576],{"class":3014,"line":3039},[3012,3577,3055],{"emptyLinePlaceholder":3054},[3012,3579,3580],{"class":3014,"line":3045},[3012,3581,3582],{"class":3206},"/**\n",[3012,3584,3585],{"class":3014,"line":3051},[3012,3586,3587],{"class":3206}," * Доменна модель автора аудіокниги.\n",[3012,3589,3590],{"class":3014,"line":3058},[3012,3591,3592],{"class":3206}," * Клас не містить жодної залежності від JDBC, SQL або будь-якої\n",[3012,3594,3595],{"class":3014,"line":3064},[3012,3596,3597],{"class":3206}," * бібліотеки персистентності — це принципова вимога архітектури.\n",[3012,3599,3600],{"class":3014,"line":3070},[3012,3601,3602],{"class":3206}," */\n",[3012,3604,3605,3608,3611,3615],{"class":3014,"line":3076},[3012,3606,3607],{"class":3439},"public",[3012,3609,3610],{"class":3439}," class",[3012,3612,3614],{"class":3613},"sN1BT"," Author",[3012,3616,3617],{"class":3231}," {\n",[3012,3619,3620],{"class":3014,"line":3320},[3012,3621,3055],{"emptyLinePlaceholder":3054},[3012,3623,3624,3627,3630,3633,3637],{"class":3014,"line":3338},[3012,3625,3626],{"class":3439},"    private",[3012,3628,3629],{"class":3439}," final",[3012,3631,3632],{"class":3613}," UUID",[3012,3634,3636],{"class":3635},"siwwj"," id",[3012,3638,3639],{"class":3231},";\n",[3012,3641,3642,3644,3647,3650],{"class":3014,"line":3356},[3012,3643,3626],{"class":3439},[3012,3645,3646],{"class":3613}," String",[3012,3648,3649],{"class":3635}," firstName",[3012,3651,3639],{"class":3231},[3012,3653,3654,3656,3658,3661],{"class":3014,"line":3365},[3012,3655,3626],{"class":3439},[3012,3657,3646],{"class":3613},[3012,3659,3660],{"class":3635}," lastName",[3012,3662,3639],{"class":3231},[3012,3664,3666,3668,3670,3673],{"class":3014,"line":3665},16,[3012,3667,3626],{"class":3439},[3012,3669,3646],{"class":3613},[3012,3671,3672],{"class":3635}," bio",[3012,3674,3639],{"class":3231},[3012,3676,3678,3680,3682,3685],{"class":3014,"line":3677},17,[3012,3679,3626],{"class":3439},[3012,3681,3646],{"class":3613},[3012,3683,3684],{"class":3635}," imagePath",[3012,3686,3639],{"class":3231},[3012,3688,3690],{"class":3014,"line":3689},18,[3012,3691,3055],{"emptyLinePlaceholder":3054},[3012,3693,3695],{"class":3014,"line":3694},19,[3012,3696,3697],{"class":3206},"    /**\n",[3012,3699,3701],{"class":3014,"line":3700},20,[3012,3702,3703],{"class":3206},"     * Конструктор для створення нового автора.\n",[3012,3705,3707],{"class":3014,"line":3706},21,[3012,3708,3709],{"class":3206},"     * ID генерується автоматично — клієнтський код не повинен\n",[3012,3711,3713],{"class":3014,"line":3712},22,[3012,3714,3715],{"class":3206},"     * піклуватися про генерацію ідентифікаторів.\n",[3012,3717,3719],{"class":3014,"line":3718},23,[3012,3720,3721],{"class":3206},"     */\n",[3012,3723,3725,3728,3730,3732,3735,3737,3739,3741,3743],{"class":3014,"line":3724},24,[3012,3726,3727],{"class":3439},"    public",[3012,3729,3614],{"class":3446},[3012,3731,3472],{"class":3231},[3012,3733,3734],{"class":3613},"String",[3012,3736,3649],{"class":3635},[3012,3738,3098],{"class":3231},[3012,3740,3734],{"class":3613},[3012,3742,3660],{"class":3635},[3012,3744,3745],{"class":3231},") {\n",[3012,3747,3749,3752,3754,3757,3760,3763,3765,3768],{"class":3014,"line":3748},25,[3012,3750,3751],{"class":3439},"        this",[3012,3753,3173],{"class":3231},[3012,3755,3756],{"class":3635},"id",[3012,3758,3759],{"class":3231}," = ",[3012,3761,3762],{"class":3635},"UUID",[3012,3764,3173],{"class":3231},[3012,3766,3767],{"class":3446},"randomUUID",[3012,3769,3770],{"class":3231},"();\n",[3012,3772,3774,3776,3778,3781],{"class":3014,"line":3773},26,[3012,3775,3751],{"class":3439},[3012,3777,3173],{"class":3231},[3012,3779,3780],{"class":3635},"firstName",[3012,3782,3783],{"class":3231}," = firstName;\n",[3012,3785,3787,3789,3791,3794],{"class":3014,"line":3786},27,[3012,3788,3751],{"class":3439},[3012,3790,3173],{"class":3231},[3012,3792,3793],{"class":3635},"lastName",[3012,3795,3796],{"class":3231}," = lastName;\n",[3012,3798,3800],{"class":3014,"line":3799},28,[3012,3801,3802],{"class":3231},"    }\n",[3012,3804,3806],{"class":3014,"line":3805},29,[3012,3807,3055],{"emptyLinePlaceholder":3054},[3012,3809,3811],{"class":3014,"line":3810},30,[3012,3812,3697],{"class":3206},[3012,3814,3816],{"class":3014,"line":3815},31,[3012,3817,3818],{"class":3206},"     * Конструктор для відновлення автора із сховища.\n",[3012,3820,3822],{"class":3014,"line":3821},32,[3012,3823,3824],{"class":3206},"     * Використовується виключно DAO/Repository при читанні з БД.\n",[3012,3826,3828],{"class":3014,"line":3827},33,[3012,3829,3830],{"class":3206},"     * ID передається явно — він вже існує у базі даних.\n",[3012,3832,3834],{"class":3014,"line":3833},34,[3012,3835,3721],{"class":3206},[3012,3837,3839,3841,3843,3845,3847,3849,3851,3853,3855,3857,3859,3861],{"class":3014,"line":3838},35,[3012,3840,3727],{"class":3439},[3012,3842,3614],{"class":3446},[3012,3844,3472],{"class":3231},[3012,3846,3762],{"class":3613},[3012,3848,3636],{"class":3635},[3012,3850,3098],{"class":3231},[3012,3852,3734],{"class":3613},[3012,3854,3649],{"class":3635},[3012,3856,3098],{"class":3231},[3012,3858,3734],{"class":3613},[3012,3860,3660],{"class":3635},[3012,3862,3461],{"class":3231},[3012,3864,3866,3869,3871,3873,3875,3877],{"class":3014,"line":3865},36,[3012,3867,3868],{"class":3613},"                  String",[3012,3870,3672],{"class":3635},[3012,3872,3098],{"class":3231},[3012,3874,3734],{"class":3613},[3012,3876,3684],{"class":3635},[3012,3878,3745],{"class":3231},[3012,3880,3882,3884,3886,3888],{"class":3014,"line":3881},37,[3012,3883,3751],{"class":3439},[3012,3885,3173],{"class":3231},[3012,3887,3756],{"class":3635},[3012,3889,3890],{"class":3231}," = id;\n",[3012,3892,3894,3896,3898,3900],{"class":3014,"line":3893},38,[3012,3895,3751],{"class":3439},[3012,3897,3173],{"class":3231},[3012,3899,3780],{"class":3635},[3012,3901,3783],{"class":3231},[3012,3903,3905,3907,3909,3911],{"class":3014,"line":3904},39,[3012,3906,3751],{"class":3439},[3012,3908,3173],{"class":3231},[3012,3910,3793],{"class":3635},[3012,3912,3796],{"class":3231},[3012,3914,3916,3918,3920,3923],{"class":3014,"line":3915},40,[3012,3917,3751],{"class":3439},[3012,3919,3173],{"class":3231},[3012,3921,3922],{"class":3635},"bio",[3012,3924,3925],{"class":3231}," = bio;\n",[3012,3927,3929,3931,3933,3936],{"class":3014,"line":3928},41,[3012,3930,3751],{"class":3439},[3012,3932,3173],{"class":3231},[3012,3934,3935],{"class":3635},"imagePath",[3012,3937,3938],{"class":3231}," = imagePath;\n",[3012,3940,3942],{"class":3014,"line":3941},42,[3012,3943,3802],{"class":3231},[3012,3945,3947],{"class":3014,"line":3946},43,[3012,3948,3055],{"emptyLinePlaceholder":3054},[3012,3950,3952],{"class":3014,"line":3951},44,[3012,3953,3954],{"class":3206},"    // --- Бізнес-методи ---\n",[3012,3956,3958],{"class":3014,"line":3957},45,[3012,3959,3055],{"emptyLinePlaceholder":3054},[3012,3961,3963],{"class":3014,"line":3962},46,[3012,3964,3965],{"class":3206},"    /** Повертає повне ім'я автора у форматі \"Прізвище Ім'я\". */\n",[3012,3967,3969,3971,3973,3976],{"class":3014,"line":3968},47,[3012,3970,3727],{"class":3439},[3012,3972,3646],{"class":3613},[3012,3974,3975],{"class":3446}," fullName",[3012,3977,3978],{"class":3231},"() {\n",[3012,3980,3982,3986,3989,3993],{"class":3014,"line":3981},48,[3012,3983,3985],{"class":3984},"sCDza","        return",[3012,3987,3988],{"class":3231}," lastName + ",[3012,3990,3992],{"class":3991},"sbdoH","\" \"",[3012,3994,3995],{"class":3231}," + firstName;\n",[3012,3997,3999],{"class":3014,"line":3998},49,[3012,4000,3802],{"class":3231},[3012,4002,4004],{"class":3014,"line":4003},50,[3012,4005,3055],{"emptyLinePlaceholder":3054},[3012,4007,4009],{"class":3014,"line":4008},51,[3012,4010,4011],{"class":3206},"    /** Перевіряє, чи заповнена біографія автора. */\n",[3012,4013,4015,4017,4020,4023],{"class":3014,"line":4014},52,[3012,4016,3727],{"class":3439},[3012,4018,4019],{"class":3613}," boolean",[3012,4021,4022],{"class":3446}," hasBio",[3012,4024,3978],{"class":3231},[3012,4026,4028,4030,4033,4036,4039,4041,4043,4046],{"class":3014,"line":4027},53,[3012,4029,3985],{"class":3984},[3012,4031,4032],{"class":3231}," bio != ",[3012,4034,4035],{"class":3439},"null",[3012,4037,4038],{"class":3231}," && !",[3012,4040,3922],{"class":3635},[3012,4042,3173],{"class":3231},[3012,4044,4045],{"class":3446},"isBlank",[3012,4047,3770],{"class":3231},[3012,4049,4051],{"class":3014,"line":4050},54,[3012,4052,3802],{"class":3231},[3012,4054,4056],{"class":3014,"line":4055},55,[3012,4057,3055],{"emptyLinePlaceholder":3054},[3012,4059,4061],{"class":3014,"line":4060},56,[3012,4062,4063],{"class":3206},"    // --- Геттери та сеттери ---\n",[3012,4065,4067,4069,4071,4074,4077,4080],{"class":3014,"line":4066},57,[3012,4068,3727],{"class":3439},[3012,4070,3632],{"class":3613},[3012,4072,4073],{"class":3446}," getId",[3012,4075,4076],{"class":3231},"()          { ",[3012,4078,4079],{"class":3984},"return",[3012,4081,4082],{"class":3231}," id; }\n",[3012,4084,4086,4088,4090,4093,4096,4098],{"class":3014,"line":4085},58,[3012,4087,3727],{"class":3439},[3012,4089,3646],{"class":3613},[3012,4091,4092],{"class":3446}," getFirstName",[3012,4094,4095],{"class":3231},"() { ",[3012,4097,4079],{"class":3984},[3012,4099,4100],{"class":3231}," firstName; }\n",[3012,4102,4104,4106,4108,4111,4114,4116],{"class":3014,"line":4103},59,[3012,4105,3727],{"class":3439},[3012,4107,3646],{"class":3613},[3012,4109,4110],{"class":3446}," getLastName",[3012,4112,4113],{"class":3231},"()  { ",[3012,4115,4079],{"class":3984},[3012,4117,4118],{"class":3231}," lastName; }\n",[3012,4120,4122,4124,4126,4129,4132,4134],{"class":3014,"line":4121},60,[3012,4123,3727],{"class":3439},[3012,4125,3646],{"class":3613},[3012,4127,4128],{"class":3446}," getBio",[3012,4130,4131],{"class":3231},"()       { ",[3012,4133,4079],{"class":3984},[3012,4135,4136],{"class":3231}," bio; }\n",[3012,4138,4140,4142,4144,4147,4149,4151],{"class":3014,"line":4139},61,[3012,4141,3727],{"class":3439},[3012,4143,3646],{"class":3613},[3012,4145,4146],{"class":3446}," getImagePath",[3012,4148,4095],{"class":3231},[3012,4150,4079],{"class":3984},[3012,4152,4153],{"class":3231}," imagePath; }\n",[3012,4155,4157],{"class":3014,"line":4156},62,[3012,4158,3055],{"emptyLinePlaceholder":3054},[3012,4160,4162,4164,4167,4170,4172,4174,4176,4179,4182,4184,4186],{"class":3014,"line":4161},63,[3012,4163,3727],{"class":3439},[3012,4165,4166],{"class":3613}," void",[3012,4168,4169],{"class":3446}," setFirstName",[3012,4171,3472],{"class":3231},[3012,4173,3734],{"class":3613},[3012,4175,3649],{"class":3635},[3012,4177,4178],{"class":3231},") { ",[3012,4180,4181],{"class":3439},"this",[3012,4183,3173],{"class":3231},[3012,4185,3780],{"class":3635},[3012,4187,4188],{"class":3231}," = firstName; }\n",[3012,4190,4192,4194,4196,4199,4201,4203,4205,4208,4210,4212,4214],{"class":3014,"line":4191},64,[3012,4193,3727],{"class":3439},[3012,4195,4166],{"class":3613},[3012,4197,4198],{"class":3446}," setLastName",[3012,4200,3472],{"class":3231},[3012,4202,3734],{"class":3613},[3012,4204,3660],{"class":3635},[3012,4206,4207],{"class":3231},")   { ",[3012,4209,4181],{"class":3439},[3012,4211,3173],{"class":3231},[3012,4213,3793],{"class":3635},[3012,4215,4216],{"class":3231}," = lastName; }\n",[3012,4218,4220,4222,4224,4227,4229,4231,4233,4236,4238,4240,4242],{"class":3014,"line":4219},65,[3012,4221,3727],{"class":3439},[3012,4223,4166],{"class":3613},[3012,4225,4226],{"class":3446}," setBio",[3012,4228,3472],{"class":3231},[3012,4230,3734],{"class":3613},[3012,4232,3672],{"class":3635},[3012,4234,4235],{"class":3231},")             { ",[3012,4237,4181],{"class":3439},[3012,4239,3173],{"class":3231},[3012,4241,3922],{"class":3635},[3012,4243,4244],{"class":3231}," = bio; }\n",[3012,4246,4248,4250,4252,4255,4257,4259,4261,4263,4265,4267,4269],{"class":3014,"line":4247},66,[3012,4249,3727],{"class":3439},[3012,4251,4166],{"class":3613},[3012,4253,4254],{"class":3446}," setImagePath",[3012,4256,3472],{"class":3231},[3012,4258,3734],{"class":3613},[3012,4260,3684],{"class":3635},[3012,4262,4178],{"class":3231},[3012,4264,4181],{"class":3439},[3012,4266,3173],{"class":3231},[3012,4268,3935],{"class":3635},[3012,4270,4271],{"class":3231}," = imagePath; }\n",[3012,4273,4275],{"class":3014,"line":4274},67,[3012,4276,3055],{"emptyLinePlaceholder":3054},[3012,4278,4280],{"class":3014,"line":4279},68,[3012,4281,3697],{"class":3206},[3012,4283,4285],{"class":3014,"line":4284},69,[3012,4286,4287],{"class":3206},"     * Рівність визначається виключно за первинним ключем —\n",[3012,4289,4291],{"class":3014,"line":4290},70,[3012,4292,4293],{"class":3206},"     * узгодження з реляційною моделлю (стаття 09, Розбіжність 3).\n",[3012,4295,4297],{"class":3014,"line":4296},71,[3012,4298,3721],{"class":3206},[3012,4300,4302,4305],{"class":3014,"line":4301},72,[3012,4303,4304],{"class":3231},"    @",[3012,4306,4307],{"class":3613},"Override\n",[3012,4309,4311,4313,4315,4318,4320,4323,4326],{"class":3014,"line":4310},73,[3012,4312,3727],{"class":3439},[3012,4314,4019],{"class":3613},[3012,4316,4317],{"class":3446}," equals",[3012,4319,3472],{"class":3231},[3012,4321,4322],{"class":3613},"Object",[3012,4324,4325],{"class":3635}," o",[3012,4327,3745],{"class":3231},[3012,4329,4331,4334,4337,4339,4342,4344,4347],{"class":3014,"line":4330},74,[3012,4332,4333],{"class":3984},"        if",[3012,4335,4336],{"class":3231}," (",[3012,4338,4181],{"class":3439},[3012,4340,4341],{"class":3231}," == o) ",[3012,4343,4079],{"class":3984},[3012,4345,4346],{"class":3439}," true",[3012,4348,3639],{"class":3231},[3012,4350,4352,4354,4357,4360,4362,4365,4367,4370],{"class":3014,"line":4351},75,[3012,4353,4333],{"class":3984},[3012,4355,4356],{"class":3231}," (!(o ",[3012,4358,4359],{"class":3439},"instanceof",[3012,4361,3614],{"class":3613},[3012,4363,4364],{"class":3231}," other)) ",[3012,4366,4079],{"class":3984},[3012,4368,4369],{"class":3439}," false",[3012,4371,3639],{"class":3231},[3012,4373,4375,4377,4380,4382,4385,4387,4389,4392,4394,4397,4399,4401],{"class":3014,"line":4374},76,[3012,4376,3985],{"class":3984},[3012,4378,4379],{"class":3231}," id != ",[3012,4381,4035],{"class":3439},[3012,4383,4384],{"class":3231}," && ",[3012,4386,3756],{"class":3635},[3012,4388,3173],{"class":3231},[3012,4390,4391],{"class":3446},"equals",[3012,4393,3472],{"class":3231},[3012,4395,4396],{"class":3635},"other",[3012,4398,3173],{"class":3231},[3012,4400,3756],{"class":3635},[3012,4402,3531],{"class":3231},[3012,4404,4406],{"class":3014,"line":4405},77,[3012,4407,3802],{"class":3231},[3012,4409,4411],{"class":3014,"line":4410},78,[3012,4412,3055],{"emptyLinePlaceholder":3054},[3012,4414,4416,4418],{"class":3014,"line":4415},79,[3012,4417,4304],{"class":3231},[3012,4419,4307],{"class":3613},[3012,4421,4423,4425,4428,4431],{"class":3014,"line":4422},80,[3012,4424,3727],{"class":3439},[3012,4426,4427],{"class":3613}," int",[3012,4429,4430],{"class":3446}," hashCode",[3012,4432,3978],{"class":3231},[3012,4434,4436,4438,4441,4443,4446],{"class":3014,"line":4435},81,[3012,4437,3985],{"class":3984},[3012,4439,4440],{"class":3635}," Objects",[3012,4442,3173],{"class":3231},[3012,4444,4445],{"class":3446},"hashCode",[3012,4447,4448],{"class":3231},"(id);\n",[3012,4450,4452],{"class":3014,"line":4451},82,[3012,4453,3802],{"class":3231},[3012,4455,4457],{"class":3014,"line":4456},83,[3012,4458,3055],{"emptyLinePlaceholder":3054},[3012,4460,4462,4464],{"class":3014,"line":4461},84,[3012,4463,4304],{"class":3231},[3012,4465,4307],{"class":3613},[3012,4467,4469,4471,4473,4476],{"class":3014,"line":4468},85,[3012,4470,3727],{"class":3439},[3012,4472,3646],{"class":3613},[3012,4474,4475],{"class":3446}," toString",[3012,4477,3978],{"class":3231},[3012,4479,4481,4483,4486,4489,4492,4495,4498,4501,4504],{"class":3014,"line":4480},86,[3012,4482,3985],{"class":3984},[3012,4484,4485],{"class":3991}," \"Author{id=\"",[3012,4487,4488],{"class":3231}," + id + ",[3012,4490,4491],{"class":3991},"\", name='\"",[3012,4493,4494],{"class":3231}," + ",[3012,4496,4497],{"class":3446},"fullName",[3012,4499,4500],{"class":3231},"() + ",[3012,4502,4503],{"class":3991},"\"'}\"",[3012,4505,3639],{"class":3231},[3012,4507,4509],{"class":3014,"line":4508},87,[3012,4510,3802],{"class":3231},[3012,4512,4514],{"class":3014,"line":4513},88,[3012,4515,4516],{"class":3231},"}\n",[2964,4518,4519],{},[2971,4520,4521],{},"Ключові архітектурні рішення:",[4523,4524,4525,4539,4549,4561,4575],"ul",{},[4526,4527,4528,4531,4532,4534,4535,4538],"li",{},[2971,4529,4530],{},"Рядок 24",": ",[2989,4533,3756],{}," оголошений як ",[2989,4536,4537],{},"final"," — ідентифікатор незмінний після створення об'єкта",[4526,4540,4541,4544,4545,4548],{},[2971,4542,4543],{},"Рядки 23–27",": Конструктор для ",[2971,4546,4547],{},"нових"," об'єктів генерує UUID автоматично; клієнт надає лише бізнес-дані",[4526,4550,4551,4544,4554,4557,4558,4560],{},[2971,4552,4553],{},"Рядки 34–41",[2971,4555,4556],{},"відновлення"," з БД приймає всі поля, включаючи ",[2989,4559,3756],{}," — цей конструктор використовуватиме виключно DAO-шар",[4526,4562,4563,4566,4567,4570,4571,4574],{},[2971,4564,4565],{},"Рядки 45–52",": Бізнес-методи ",[2989,4568,4569],{},"fullName()"," та ",[2989,4572,4573],{},"hasBio()"," — поведінка, що належить домену, а не DAO",[4526,4576,4577,4531,4580,4583],{},[2971,4578,4579],{},"Рядки 72–76",[2989,4581,4582],{},"equals()"," за PK — правильний підхід для сутностей з БД",[3416,4585],{},[2959,4587,4589],{"id":4588},"перша-реалізація-authornaivedao","Перша реалізація: AuthorNaiveDao",[2964,4591,4592],{},"Тепер напишемо найпростіший можливий DAO. Ми свідомо реалізуємо його «в лоб», без жодних абстракцій — щоб потім чітко побачити кожну з проблем.",[3004,4594,4596],{"className":3541,"code":4595,"language":3543,"meta":3544,"style":3008},"package com.example.audiobook.dao;\n\nimport com.example.audiobook.domain.Author;\n\nimport java.sql.*;\nimport java.util.ArrayList;\nimport java.util.List;\nimport java.util.Optional;\nimport java.util.UUID;\n\n/**\n * Найпростіша реалізація DAO для роботи з таблицею authors.\n * УВАГА: цей клас навмисно написаний \"наївно\" і містить\n * кілька критичних проблем, які будуть виявлені та виправлені далі.\n */\npublic class AuthorNaiveDao {\n\n    // URL підключення до H2 у файловому режимі з PostgreSQL-сумісністю\n    private static final String DB_URL =\n        \"jdbc:h2:./data/audiobook_db;MODE=PostgreSQL;DB_CLOSE_DELAY=-1\";\n    private static final String DB_USER = \"sa\";\n    private static final String DB_PASS = \"\";\n\n    /**\n     * Зберігає нового автора у базі даних.\n     * ПРОБЛЕМА: створює нове з'єднання при кожному виклику.\n     */\n    public void save(Author author) {\n        // Проблема 1: рядок SQL конкатенується — небезпечно!\n        String sql = \"INSERT INTO authors (id, first_name, last_name, bio, image_path) \" +\n                     \"VALUES ('\" + author.getId() + \"', '\" +\n                     author.getFirstName() + \"', '\" +\n                     author.getLastName() + \"', '\" +\n                     author.getBio() + \"', '\" +\n                     author.getImagePath() + \"')\";\n        try {\n            // Проблема 2: Connection створюється і НЕ закривається\n            Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);\n            Statement stmt = conn.createStatement();\n            stmt.executeUpdate(sql);\n            // Проблема 3: stmt і conn не закриваються → витік ресурсів\n        } catch (SQLException e) {\n            // Проблема 4: помилка \"проковтується\" — silent failure\n            System.err.println(\"Помилка збереження: \" + e.getMessage());\n        }\n    }\n\n    /**\n     * Знаходить автора за ідентифікатором.\n     */\n    public Optional\u003CAuthor> findById(UUID id) {\n        String sql = \"SELECT id, first_name, last_name, bio, image_path \" +\n                     \"FROM authors WHERE id = '\" + id + \"'\"; // Проблема 1 знову\n        try {\n            Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);\n            Statement stmt = conn.createStatement();\n            ResultSet rs = stmt.executeQuery(sql);\n\n            if (rs.next()) {\n                Author author = mapRow(rs);\n                // Проблема 3: rs, stmt, conn не закриваються\n                return Optional.of(author);\n            }\n        } catch (SQLException e) {\n            System.err.println(\"Помилка пошуку: \" + e.getMessage());\n        }\n        return Optional.empty();\n    }\n\n    /**\n     * Повертає всіх авторів.\n     */\n    public List\u003CAuthor> findAll() {\n        String sql = \"SELECT id, first_name, last_name, bio, image_path FROM authors\";\n        List\u003CAuthor> authors = new ArrayList\u003C>();\n        try {\n            Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);\n            Statement stmt = conn.createStatement();\n            ResultSet rs = stmt.executeQuery(sql);\n            while (rs.next()) {\n                authors.add(mapRow(rs));\n            }\n        } catch (SQLException e) {\n            System.err.println(\"Помилка отримання списку: \" + e.getMessage());\n        }\n        return authors;\n    }\n\n    /**\n     * Перетворює поточний рядок ResultSet на об'єкт Author.\n     * Маппінг зібраний в одному місці — це єдине правильне рішення тут.\n     */\n    private Author mapRow(ResultSet rs) throws SQLException {\n        return new Author(\n            rs.getObject(\"id\", UUID.class),     // UUID напряму з H2\n            rs.getString(\"first_name\"),\n            rs.getString(\"last_name\"),\n            rs.getString(\"bio\"),                 // може бути null — OK\n            rs.getString(\"image_path\")           // може бути null — OK\n        );\n    }\n}\n",[2989,4597,4598,4605,4609,4616,4620,4627,4634,4641,4648,4654,4658,4662,4667,4672,4677,4681,4692,4696,4701,4718,4725,4745,4765,4769,4773,4778,4783,4787,4805,4810,4826,4848,4864,4879,4894,4910,4917,4922,4942,4962,4975,4980,4998,5003,5036,5041,5045,5049,5053,5058,5062,5087,5100,5116,5122,5138,5154,5174,5178,5196,5211,5216,5231,5236,5250,5277,5281,5294,5298,5302,5306,5311,5315,5333,5346,5370,5376,5392,5408,5424,5439,5456,5460,5474,5501,5505,5512,5516,5520,5525,5531,5537,5542,5569,5582,5613,5631,5647,5667,5686,5692,5697],{"__ignoreMap":3008},[3012,4599,4600,4602],{"class":3014,"line":3015},[3012,4601,3551],{"class":3439},[3012,4603,4604],{"class":3231}," com.example.audiobook.dao;\n",[3012,4606,4607],{"class":3014,"line":3021},[3012,4608,3055],{"emptyLinePlaceholder":3054},[3012,4610,4611,4613],{"class":3014,"line":3027},[3012,4612,3563],{"class":3439},[3012,4614,4615],{"class":3231}," com.example.audiobook.domain.Author;\n",[3012,4617,4618],{"class":3014,"line":3033},[3012,4619,3055],{"emptyLinePlaceholder":3054},[3012,4621,4622,4624],{"class":3014,"line":3039},[3012,4623,3563],{"class":3439},[3012,4625,4626],{"class":3231}," java.sql.*;\n",[3012,4628,4629,4631],{"class":3014,"line":3045},[3012,4630,3563],{"class":3439},[3012,4632,4633],{"class":3231}," java.util.ArrayList;\n",[3012,4635,4636,4638],{"class":3014,"line":3051},[3012,4637,3563],{"class":3439},[3012,4639,4640],{"class":3231}," java.util.List;\n",[3012,4642,4643,4645],{"class":3014,"line":3058},[3012,4644,3563],{"class":3439},[3012,4646,4647],{"class":3231}," java.util.Optional;\n",[3012,4649,4650,4652],{"class":3014,"line":3064},[3012,4651,3563],{"class":3439},[3012,4653,3573],{"class":3231},[3012,4655,4656],{"class":3014,"line":3070},[3012,4657,3055],{"emptyLinePlaceholder":3054},[3012,4659,4660],{"class":3014,"line":3076},[3012,4661,3582],{"class":3206},[3012,4663,4664],{"class":3014,"line":3320},[3012,4665,4666],{"class":3206}," * Найпростіша реалізація DAO для роботи з таблицею authors.\n",[3012,4668,4669],{"class":3014,"line":3338},[3012,4670,4671],{"class":3206}," * УВАГА: цей клас навмисно написаний \"наївно\" і містить\n",[3012,4673,4674],{"class":3014,"line":3356},[3012,4675,4676],{"class":3206}," * кілька критичних проблем, які будуть виявлені та виправлені далі.\n",[3012,4678,4679],{"class":3014,"line":3365},[3012,4680,3602],{"class":3206},[3012,4682,4683,4685,4687,4690],{"class":3014,"line":3665},[3012,4684,3607],{"class":3439},[3012,4686,3610],{"class":3439},[3012,4688,4689],{"class":3613}," AuthorNaiveDao",[3012,4691,3617],{"class":3231},[3012,4693,4694],{"class":3014,"line":3677},[3012,4695,3055],{"emptyLinePlaceholder":3054},[3012,4697,4698],{"class":3014,"line":3689},[3012,4699,4700],{"class":3206},"    // URL підключення до H2 у файловому режимі з PostgreSQL-сумісністю\n",[3012,4702,4703,4705,4708,4710,4712,4715],{"class":3014,"line":3694},[3012,4704,3626],{"class":3439},[3012,4706,4707],{"class":3439}," static",[3012,4709,3629],{"class":3439},[3012,4711,3646],{"class":3613},[3012,4713,4714],{"class":3635}," DB_URL",[3012,4716,4717],{"class":3231}," =\n",[3012,4719,4720,4723],{"class":3014,"line":3700},[3012,4721,4722],{"class":3991},"        \"jdbc:h2:./data/audiobook_db;MODE=PostgreSQL;DB_CLOSE_DELAY=-1\"",[3012,4724,3639],{"class":3231},[3012,4726,4727,4729,4731,4733,4735,4738,4740,4743],{"class":3014,"line":3706},[3012,4728,3626],{"class":3439},[3012,4730,4707],{"class":3439},[3012,4732,3629],{"class":3439},[3012,4734,3646],{"class":3613},[3012,4736,4737],{"class":3635}," DB_USER",[3012,4739,3759],{"class":3231},[3012,4741,4742],{"class":3991},"\"sa\"",[3012,4744,3639],{"class":3231},[3012,4746,4747,4749,4751,4753,4755,4758,4760,4763],{"class":3014,"line":3712},[3012,4748,3626],{"class":3439},[3012,4750,4707],{"class":3439},[3012,4752,3629],{"class":3439},[3012,4754,3646],{"class":3613},[3012,4756,4757],{"class":3635}," DB_PASS",[3012,4759,3759],{"class":3231},[3012,4761,4762],{"class":3991},"\"\"",[3012,4764,3639],{"class":3231},[3012,4766,4767],{"class":3014,"line":3718},[3012,4768,3055],{"emptyLinePlaceholder":3054},[3012,4770,4771],{"class":3014,"line":3724},[3012,4772,3697],{"class":3206},[3012,4774,4775],{"class":3014,"line":3748},[3012,4776,4777],{"class":3206},"     * Зберігає нового автора у базі даних.\n",[3012,4779,4780],{"class":3014,"line":3773},[3012,4781,4782],{"class":3206},"     * ПРОБЛЕМА: створює нове з'єднання при кожному виклику.\n",[3012,4784,4785],{"class":3014,"line":3786},[3012,4786,3721],{"class":3206},[3012,4788,4789,4791,4793,4796,4798,4800,4803],{"class":3014,"line":3799},[3012,4790,3727],{"class":3439},[3012,4792,4166],{"class":3613},[3012,4794,4795],{"class":3446}," save",[3012,4797,3472],{"class":3231},[3012,4799,3537],{"class":3613},[3012,4801,4802],{"class":3635}," author",[3012,4804,3745],{"class":3231},[3012,4806,4807],{"class":3014,"line":3805},[3012,4808,4809],{"class":3206},"        // Проблема 1: рядок SQL конкатенується — небезпечно!\n",[3012,4811,4812,4815,4818,4820,4823],{"class":3014,"line":3810},[3012,4813,4814],{"class":3613},"        String",[3012,4816,4817],{"class":3635}," sql",[3012,4819,3759],{"class":3231},[3012,4821,4822],{"class":3991},"\"INSERT INTO authors (id, first_name, last_name, bio, image_path) \"",[3012,4824,4825],{"class":3231}," +\n",[3012,4827,4828,4831,4833,4836,4838,4841,4843,4846],{"class":3014,"line":3815},[3012,4829,4830],{"class":3991},"                     \"VALUES ('\"",[3012,4832,4494],{"class":3231},[3012,4834,4835],{"class":3635},"author",[3012,4837,3173],{"class":3231},[3012,4839,4840],{"class":3446},"getId",[3012,4842,4500],{"class":3231},[3012,4844,4845],{"class":3991},"\"', '\"",[3012,4847,4825],{"class":3231},[3012,4849,4850,4853,4855,4858,4860,4862],{"class":3014,"line":3821},[3012,4851,4852],{"class":3635},"                     author",[3012,4854,3173],{"class":3231},[3012,4856,4857],{"class":3446},"getFirstName",[3012,4859,4500],{"class":3231},[3012,4861,4845],{"class":3991},[3012,4863,4825],{"class":3231},[3012,4865,4866,4868,4870,4873,4875,4877],{"class":3014,"line":3827},[3012,4867,4852],{"class":3635},[3012,4869,3173],{"class":3231},[3012,4871,4872],{"class":3446},"getLastName",[3012,4874,4500],{"class":3231},[3012,4876,4845],{"class":3991},[3012,4878,4825],{"class":3231},[3012,4880,4881,4883,4885,4888,4890,4892],{"class":3014,"line":3833},[3012,4882,4852],{"class":3635},[3012,4884,3173],{"class":3231},[3012,4886,4887],{"class":3446},"getBio",[3012,4889,4500],{"class":3231},[3012,4891,4845],{"class":3991},[3012,4893,4825],{"class":3231},[3012,4895,4896,4898,4900,4903,4905,4908],{"class":3014,"line":3838},[3012,4897,4852],{"class":3635},[3012,4899,3173],{"class":3231},[3012,4901,4902],{"class":3446},"getImagePath",[3012,4904,4500],{"class":3231},[3012,4906,4907],{"class":3991},"\"')\"",[3012,4909,3639],{"class":3231},[3012,4911,4912,4915],{"class":3014,"line":3865},[3012,4913,4914],{"class":3984},"        try",[3012,4916,3617],{"class":3231},[3012,4918,4919],{"class":3014,"line":3881},[3012,4920,4921],{"class":3206},"            // Проблема 2: Connection створюється і НЕ закривається\n",[3012,4923,4924,4927,4930,4932,4934,4936,4939],{"class":3014,"line":3893},[3012,4925,4926],{"class":3613},"            Connection",[3012,4928,4929],{"class":3635}," conn",[3012,4931,3759],{"class":3231},[3012,4933,3089],{"class":3635},[3012,4935,3173],{"class":3231},[3012,4937,4938],{"class":3446},"getConnection",[3012,4940,4941],{"class":3231},"(DB_URL, DB_USER, DB_PASS);\n",[3012,4943,4944,4947,4950,4952,4955,4957,4960],{"class":3014,"line":3904},[3012,4945,4946],{"class":3613},"            Statement",[3012,4948,4949],{"class":3635}," stmt",[3012,4951,3759],{"class":3231},[3012,4953,4954],{"class":3635},"conn",[3012,4956,3173],{"class":3231},[3012,4958,4959],{"class":3446},"createStatement",[3012,4961,3770],{"class":3231},[3012,4963,4964,4967,4969,4972],{"class":3014,"line":3915},[3012,4965,4966],{"class":3635},"            stmt",[3012,4968,3173],{"class":3231},[3012,4970,4971],{"class":3446},"executeUpdate",[3012,4973,4974],{"class":3231},"(sql);\n",[3012,4976,4977],{"class":3014,"line":3928},[3012,4978,4979],{"class":3206},"            // Проблема 3: stmt і conn не закриваються → витік ресурсів\n",[3012,4981,4982,4985,4988,4990,4993,4996],{"class":3014,"line":3941},[3012,4983,4984],{"class":3231},"        } ",[3012,4986,4987],{"class":3984},"catch",[3012,4989,4336],{"class":3231},[3012,4991,4992],{"class":3613},"SQLException",[3012,4994,4995],{"class":3635}," e",[3012,4997,3745],{"class":3231},[3012,4999,5000],{"class":3014,"line":3946},[3012,5001,5002],{"class":3206},"            // Проблема 4: помилка \"проковтується\" — silent failure\n",[3012,5004,5005,5008,5010,5013,5015,5018,5020,5023,5025,5028,5030,5033],{"class":3014,"line":3951},[3012,5006,5007],{"class":3635},"            System",[3012,5009,3173],{"class":3231},[3012,5011,5012],{"class":3635},"err",[3012,5014,3173],{"class":3231},[3012,5016,5017],{"class":3446},"println",[3012,5019,3472],{"class":3231},[3012,5021,5022],{"class":3991},"\"Помилка збереження: \"",[3012,5024,4494],{"class":3231},[3012,5026,5027],{"class":3635},"e",[3012,5029,3173],{"class":3231},[3012,5031,5032],{"class":3446},"getMessage",[3012,5034,5035],{"class":3231},"());\n",[3012,5037,5038],{"class":3014,"line":3957},[3012,5039,5040],{"class":3231},"        }\n",[3012,5042,5043],{"class":3014,"line":3962},[3012,5044,3802],{"class":3231},[3012,5046,5047],{"class":3014,"line":3968},[3012,5048,3055],{"emptyLinePlaceholder":3054},[3012,5050,5051],{"class":3014,"line":3981},[3012,5052,3697],{"class":3206},[3012,5054,5055],{"class":3014,"line":3998},[3012,5056,5057],{"class":3206},"     * Знаходить автора за ідентифікатором.\n",[3012,5059,5060],{"class":3014,"line":4003},[3012,5061,3721],{"class":3206},[3012,5063,5064,5066,5069,5071,5073,5076,5079,5081,5083,5085],{"class":3014,"line":4008},[3012,5065,3727],{"class":3439},[3012,5067,5068],{"class":3613}," Optional",[3012,5070,3194],{"class":3231},[3012,5072,3537],{"class":3613},[3012,5074,5075],{"class":3231},"> ",[3012,5077,5078],{"class":3446},"findById",[3012,5080,3472],{"class":3231},[3012,5082,3762],{"class":3613},[3012,5084,3636],{"class":3635},[3012,5086,3745],{"class":3231},[3012,5088,5089,5091,5093,5095,5098],{"class":3014,"line":4014},[3012,5090,4814],{"class":3613},[3012,5092,4817],{"class":3635},[3012,5094,3759],{"class":3231},[3012,5096,5097],{"class":3991},"\"SELECT id, first_name, last_name, bio, image_path \"",[3012,5099,4825],{"class":3231},[3012,5101,5102,5105,5107,5110,5113],{"class":3014,"line":4027},[3012,5103,5104],{"class":3991},"                     \"FROM authors WHERE id = '\"",[3012,5106,4488],{"class":3231},[3012,5108,5109],{"class":3991},"\"'\"",[3012,5111,5112],{"class":3231},"; ",[3012,5114,5115],{"class":3206},"// Проблема 1 знову\n",[3012,5117,5118,5120],{"class":3014,"line":4050},[3012,5119,4914],{"class":3984},[3012,5121,3617],{"class":3231},[3012,5123,5124,5126,5128,5130,5132,5134,5136],{"class":3014,"line":4055},[3012,5125,4926],{"class":3613},[3012,5127,4929],{"class":3635},[3012,5129,3759],{"class":3231},[3012,5131,3089],{"class":3635},[3012,5133,3173],{"class":3231},[3012,5135,4938],{"class":3446},[3012,5137,4941],{"class":3231},[3012,5139,5140,5142,5144,5146,5148,5150,5152],{"class":3014,"line":4060},[3012,5141,4946],{"class":3613},[3012,5143,4949],{"class":3635},[3012,5145,3759],{"class":3231},[3012,5147,4954],{"class":3635},[3012,5149,3173],{"class":3231},[3012,5151,4959],{"class":3446},[3012,5153,3770],{"class":3231},[3012,5155,5156,5159,5162,5164,5167,5169,5172],{"class":3014,"line":4066},[3012,5157,5158],{"class":3613},"            ResultSet",[3012,5160,5161],{"class":3635}," rs",[3012,5163,3759],{"class":3231},[3012,5165,5166],{"class":3635},"stmt",[3012,5168,3173],{"class":3231},[3012,5170,5171],{"class":3446},"executeQuery",[3012,5173,4974],{"class":3231},[3012,5175,5176],{"class":3014,"line":4085},[3012,5177,3055],{"emptyLinePlaceholder":3054},[3012,5179,5180,5183,5185,5188,5190,5193],{"class":3014,"line":4103},[3012,5181,5182],{"class":3984},"            if",[3012,5184,4336],{"class":3231},[3012,5186,5187],{"class":3635},"rs",[3012,5189,3173],{"class":3231},[3012,5191,5192],{"class":3446},"next",[3012,5194,5195],{"class":3231},"()) {\n",[3012,5197,5198,5201,5203,5205,5208],{"class":3014,"line":4121},[3012,5199,5200],{"class":3613},"                Author",[3012,5202,4802],{"class":3635},[3012,5204,3759],{"class":3231},[3012,5206,5207],{"class":3446},"mapRow",[3012,5209,5210],{"class":3231},"(rs);\n",[3012,5212,5213],{"class":3014,"line":4139},[3012,5214,5215],{"class":3206},"                // Проблема 3: rs, stmt, conn не закриваються\n",[3012,5217,5218,5221,5223,5225,5228],{"class":3014,"line":4156},[3012,5219,5220],{"class":3984},"                return",[3012,5222,5068],{"class":3635},[3012,5224,3173],{"class":3231},[3012,5226,5227],{"class":3446},"of",[3012,5229,5230],{"class":3231},"(author);\n",[3012,5232,5233],{"class":3014,"line":4161},[3012,5234,5235],{"class":3231},"            }\n",[3012,5237,5238,5240,5242,5244,5246,5248],{"class":3014,"line":4191},[3012,5239,4984],{"class":3231},[3012,5241,4987],{"class":3984},[3012,5243,4336],{"class":3231},[3012,5245,4992],{"class":3613},[3012,5247,4995],{"class":3635},[3012,5249,3745],{"class":3231},[3012,5251,5252,5254,5256,5258,5260,5262,5264,5267,5269,5271,5273,5275],{"class":3014,"line":4219},[3012,5253,5007],{"class":3635},[3012,5255,3173],{"class":3231},[3012,5257,5012],{"class":3635},[3012,5259,3173],{"class":3231},[3012,5261,5017],{"class":3446},[3012,5263,3472],{"class":3231},[3012,5265,5266],{"class":3991},"\"Помилка пошуку: \"",[3012,5268,4494],{"class":3231},[3012,5270,5027],{"class":3635},[3012,5272,3173],{"class":3231},[3012,5274,5032],{"class":3446},[3012,5276,5035],{"class":3231},[3012,5278,5279],{"class":3014,"line":4247},[3012,5280,5040],{"class":3231},[3012,5282,5283,5285,5287,5289,5292],{"class":3014,"line":4274},[3012,5284,3985],{"class":3984},[3012,5286,5068],{"class":3635},[3012,5288,3173],{"class":3231},[3012,5290,5291],{"class":3446},"empty",[3012,5293,3770],{"class":3231},[3012,5295,5296],{"class":3014,"line":4279},[3012,5297,3802],{"class":3231},[3012,5299,5300],{"class":3014,"line":4284},[3012,5301,3055],{"emptyLinePlaceholder":3054},[3012,5303,5304],{"class":3014,"line":4290},[3012,5305,3697],{"class":3206},[3012,5307,5308],{"class":3014,"line":4296},[3012,5309,5310],{"class":3206},"     * Повертає всіх авторів.\n",[3012,5312,5313],{"class":3014,"line":4301},[3012,5314,3721],{"class":3206},[3012,5316,5317,5319,5322,5324,5326,5328,5331],{"class":3014,"line":4310},[3012,5318,3727],{"class":3439},[3012,5320,5321],{"class":3613}," List",[3012,5323,3194],{"class":3231},[3012,5325,3537],{"class":3613},[3012,5327,5075],{"class":3231},[3012,5329,5330],{"class":3446},"findAll",[3012,5332,3978],{"class":3231},[3012,5334,5335,5337,5339,5341,5344],{"class":3014,"line":4330},[3012,5336,4814],{"class":3613},[3012,5338,4817],{"class":3635},[3012,5340,3759],{"class":3231},[3012,5342,5343],{"class":3991},"\"SELECT id, first_name, last_name, bio, image_path FROM authors\"",[3012,5345,3639],{"class":3231},[3012,5347,5348,5351,5353,5355,5357,5359,5361,5364,5367],{"class":3014,"line":4351},[3012,5349,5350],{"class":3613},"        List",[3012,5352,3194],{"class":3231},[3012,5354,3537],{"class":3613},[3012,5356,5075],{"class":3231},[3012,5358,2991],{"class":3635},[3012,5360,3759],{"class":3231},[3012,5362,5363],{"class":3984},"new",[3012,5365,5366],{"class":3613}," ArrayList",[3012,5368,5369],{"class":3231},"\u003C>();\n",[3012,5371,5372,5374],{"class":3014,"line":4374},[3012,5373,4914],{"class":3984},[3012,5375,3617],{"class":3231},[3012,5377,5378,5380,5382,5384,5386,5388,5390],{"class":3014,"line":4405},[3012,5379,4926],{"class":3613},[3012,5381,4929],{"class":3635},[3012,5383,3759],{"class":3231},[3012,5385,3089],{"class":3635},[3012,5387,3173],{"class":3231},[3012,5389,4938],{"class":3446},[3012,5391,4941],{"class":3231},[3012,5393,5394,5396,5398,5400,5402,5404,5406],{"class":3014,"line":4410},[3012,5395,4946],{"class":3613},[3012,5397,4949],{"class":3635},[3012,5399,3759],{"class":3231},[3012,5401,4954],{"class":3635},[3012,5403,3173],{"class":3231},[3012,5405,4959],{"class":3446},[3012,5407,3770],{"class":3231},[3012,5409,5410,5412,5414,5416,5418,5420,5422],{"class":3014,"line":4415},[3012,5411,5158],{"class":3613},[3012,5413,5161],{"class":3635},[3012,5415,3759],{"class":3231},[3012,5417,5166],{"class":3635},[3012,5419,3173],{"class":3231},[3012,5421,5171],{"class":3446},[3012,5423,4974],{"class":3231},[3012,5425,5426,5429,5431,5433,5435,5437],{"class":3014,"line":4422},[3012,5427,5428],{"class":3984},"            while",[3012,5430,4336],{"class":3231},[3012,5432,5187],{"class":3635},[3012,5434,3173],{"class":3231},[3012,5436,5192],{"class":3446},[3012,5438,5195],{"class":3231},[3012,5440,5441,5444,5446,5449,5451,5453],{"class":3014,"line":4435},[3012,5442,5443],{"class":3635},"                authors",[3012,5445,3173],{"class":3231},[3012,5447,5448],{"class":3446},"add",[3012,5450,3472],{"class":3231},[3012,5452,5207],{"class":3446},[3012,5454,5455],{"class":3231},"(rs));\n",[3012,5457,5458],{"class":3014,"line":4451},[3012,5459,5235],{"class":3231},[3012,5461,5462,5464,5466,5468,5470,5472],{"class":3014,"line":4456},[3012,5463,4984],{"class":3231},[3012,5465,4987],{"class":3984},[3012,5467,4336],{"class":3231},[3012,5469,4992],{"class":3613},[3012,5471,4995],{"class":3635},[3012,5473,3745],{"class":3231},[3012,5475,5476,5478,5480,5482,5484,5486,5488,5491,5493,5495,5497,5499],{"class":3014,"line":4461},[3012,5477,5007],{"class":3635},[3012,5479,3173],{"class":3231},[3012,5481,5012],{"class":3635},[3012,5483,3173],{"class":3231},[3012,5485,5017],{"class":3446},[3012,5487,3472],{"class":3231},[3012,5489,5490],{"class":3991},"\"Помилка отримання списку: \"",[3012,5492,4494],{"class":3231},[3012,5494,5027],{"class":3635},[3012,5496,3173],{"class":3231},[3012,5498,5032],{"class":3446},[3012,5500,5035],{"class":3231},[3012,5502,5503],{"class":3014,"line":4468},[3012,5504,5040],{"class":3231},[3012,5506,5507,5509],{"class":3014,"line":4480},[3012,5508,3985],{"class":3984},[3012,5510,5511],{"class":3231}," authors;\n",[3012,5513,5514],{"class":3014,"line":4508},[3012,5515,3802],{"class":3231},[3012,5517,5518],{"class":3014,"line":4513},[3012,5519,3055],{"emptyLinePlaceholder":3054},[3012,5521,5523],{"class":3014,"line":5522},89,[3012,5524,3697],{"class":3206},[3012,5526,5528],{"class":3014,"line":5527},90,[3012,5529,5530],{"class":3206},"     * Перетворює поточний рядок ResultSet на об'єкт Author.\n",[3012,5532,5534],{"class":3014,"line":5533},91,[3012,5535,5536],{"class":3206},"     * Маппінг зібраний в одному місці — це єдине правильне рішення тут.\n",[3012,5538,5540],{"class":3014,"line":5539},92,[3012,5541,3721],{"class":3206},[3012,5543,5545,5547,5549,5552,5554,5556,5558,5561,5564,5567],{"class":3014,"line":5544},93,[3012,5546,3626],{"class":3439},[3012,5548,3614],{"class":3613},[3012,5550,5551],{"class":3446}," mapRow",[3012,5553,3472],{"class":3231},[3012,5555,3150],{"class":3613},[3012,5557,5161],{"class":3635},[3012,5559,5560],{"class":3231},") ",[3012,5562,5563],{"class":3439},"throws",[3012,5565,5566],{"class":3613}," SQLException",[3012,5568,3617],{"class":3231},[3012,5570,5572,5574,5577,5579],{"class":3014,"line":5571},94,[3012,5573,3985],{"class":3984},[3012,5575,5576],{"class":3984}," new",[3012,5578,3614],{"class":3446},[3012,5580,5581],{"class":3231},"(\n",[3012,5583,5585,5588,5590,5593,5595,5598,5600,5602,5604,5607,5610],{"class":3014,"line":5584},95,[3012,5586,5587],{"class":3635},"            rs",[3012,5589,3173],{"class":3231},[3012,5591,5592],{"class":3446},"getObject",[3012,5594,3472],{"class":3231},[3012,5596,5597],{"class":3991},"\"id\"",[3012,5599,3098],{"class":3231},[3012,5601,3762],{"class":3635},[3012,5603,3173],{"class":3231},[3012,5605,5606],{"class":3635},"class",[3012,5608,5609],{"class":3231},"),     ",[3012,5611,5612],{"class":3206},"// UUID напряму з H2\n",[3012,5614,5616,5618,5620,5623,5625,5628],{"class":3014,"line":5615},96,[3012,5617,5587],{"class":3635},[3012,5619,3173],{"class":3231},[3012,5621,5622],{"class":3446},"getString",[3012,5624,3472],{"class":3231},[3012,5626,5627],{"class":3991},"\"first_name\"",[3012,5629,5630],{"class":3231},"),\n",[3012,5632,5634,5636,5638,5640,5642,5645],{"class":3014,"line":5633},97,[3012,5635,5587],{"class":3635},[3012,5637,3173],{"class":3231},[3012,5639,5622],{"class":3446},[3012,5641,3472],{"class":3231},[3012,5643,5644],{"class":3991},"\"last_name\"",[3012,5646,5630],{"class":3231},[3012,5648,5650,5652,5654,5656,5658,5661,5664],{"class":3014,"line":5649},98,[3012,5651,5587],{"class":3635},[3012,5653,3173],{"class":3231},[3012,5655,5622],{"class":3446},[3012,5657,3472],{"class":3231},[3012,5659,5660],{"class":3991},"\"bio\"",[3012,5662,5663],{"class":3231},"),                 ",[3012,5665,5666],{"class":3206},"// може бути null — OK\n",[3012,5668,5670,5672,5674,5676,5678,5681,5684],{"class":3014,"line":5669},99,[3012,5671,5587],{"class":3635},[3012,5673,3173],{"class":3231},[3012,5675,5622],{"class":3446},[3012,5677,3472],{"class":3231},[3012,5679,5680],{"class":3991},"\"image_path\"",[3012,5682,5683],{"class":3231},")           ",[3012,5685,5666],{"class":3206},[3012,5687,5689],{"class":3014,"line":5688},100,[3012,5690,5691],{"class":3231},"        );\n",[3012,5693,5695],{"class":3014,"line":5694},101,[3012,5696,3802],{"class":3231},[3012,5698,5700],{"class":3014,"line":5699},102,[3012,5701,4516],{"class":3231},[2964,5703,5704,5707,5708,5711],{},[2971,5705,5706],{},"Зверніть увагу:"," метод ",[2989,5709,5710],{},"mapRow()"," вже реалізований правильно — маппінг зібраний в одному місці, а не дублюється у кожному методі. Але решта коду містить чотири серйозних проблеми, що у production-системі призведуть до збоїв.",[3416,5713],{},[2959,5715,5717],{"id":5716},"чотири-критичні-проблеми-наївного-підходу","Чотири критичні проблеми наївного підходу",[3175,5719,5721],{"id":5720},"проблема-1-sql-інєкція-через-конкатенацію-рядків","Проблема 1: SQL-ін'єкція через конкатенацію рядків",[2964,5723,5724,5725,5728],{},"Подивимося на рядок побудови запиту у методі ",[2989,5726,5727],{},"save()",":",[3004,5730,5732],{"className":3541,"code":5731,"language":3543,"meta":3008,"style":3008},"String sql = \"INSERT INTO authors ... VALUES ('\" + author.getFirstName() + \"', '\" + ...\n",[2989,5733,5734],{"__ignoreMap":3008},[3012,5735,5736,5738,5740,5742,5745,5747,5749,5751,5753,5755,5757],{"class":3014,"line":3015},[3012,5737,3734],{"class":3613},[3012,5739,4817],{"class":3635},[3012,5741,3759],{"class":3231},[3012,5743,5744],{"class":3991},"\"INSERT INTO authors ... VALUES ('\"",[3012,5746,4494],{"class":3231},[3012,5748,4835],{"class":3635},[3012,5750,3173],{"class":3231},[3012,5752,4857],{"class":3446},[3012,5754,4500],{"class":3231},[3012,5756,4845],{"class":3991},[3012,5758,5759],{"class":3231}," + ...\n",[2964,5761,5762,5763,5766,5767,5770],{},"Що станеться, якщо ",[2989,5764,5765],{},"author.getFirstName()"," містить значення ",[2989,5768,5769],{},"O'Brien","? У SQL-запиті з'явиться некоректна лапка:",[3004,5772,5774],{"className":3430,"code":5773,"language":3432,"meta":3008,"style":3008},"INSERT INTO authors ... VALUES ('O'Brien', ...)\n--                                 ^ Синтаксична помилка!\n",[2989,5775,5776,5798],{"__ignoreMap":3008},[3012,5777,5778,5781,5784,5787,5789,5792,5795],{"class":3014,"line":3015},[3012,5779,5780],{"class":3439},"INSERT INTO",[3012,5782,5783],{"class":3231}," authors ... ",[3012,5785,5786],{"class":3439},"VALUES",[3012,5788,4336],{"class":3231},[3012,5790,5791],{"class":3991},"'O'",[3012,5793,5794],{"class":3231},"Brien",[3012,5796,5797],{"class":3991},"', ...)\n",[3012,5799,5800],{"class":3014,"line":3021},[3012,5801,5802],{"class":3991},"--                                 ^ Синтаксична помилка!\n",[2964,5804,5805,5806,5809],{},"Але набагато гірше — зловмисний користувач може передати ім'я ",[2989,5807,5808],{},"'); DROP TABLE authors; --"," і отримати:",[3004,5811,5813],{"className":3430,"code":5812,"language":3432,"meta":3008,"style":3008},"INSERT INTO authors ... VALUES (''); DROP TABLE authors; --', ...)\n-- Перший запит — порожній INSERT\n-- Другий запит — видалення таблиці authors!\n",[2989,5814,5815,5843,5848],{"__ignoreMap":3008},[3012,5816,5817,5819,5821,5823,5825,5828,5831,5834,5836,5838,5840],{"class":3014,"line":3015},[3012,5818,5780],{"class":3439},[3012,5820,5783],{"class":3231},[3012,5822,5786],{"class":3439},[3012,5824,4336],{"class":3231},[3012,5826,5827],{"class":3991},"''",[3012,5829,5830],{"class":3231},"); ",[3012,5832,5833],{"class":3439},"DROP",[3012,5835,3443],{"class":3439},[3012,5837,3447],{"class":3446},[3012,5839,5112],{"class":3231},[3012,5841,5842],{"class":3206},"--', ...)\n",[3012,5844,5845],{"class":3014,"line":3021},[3012,5846,5847],{"class":3206},"-- Перший запит — порожній INSERT\n",[3012,5849,5850],{"class":3014,"line":3027},[3012,5851,5852],{"class":3206},"-- Другий запит — видалення таблиці authors!\n",[2964,5854,5855,5856,5859],{},"Це класична ",[2971,5857,5858],{},"SQL-ін'єкція"," (SQL Injection) — одна з найнебезпечніших вразливостей у веб-застосунках, що входить до OWASP Top 10 вже понад 20 років поспіль.",[5861,5862,5863],"caution",{},"SQL-ін'єкція через конкатенацію рядків — це не теоретична загроза. Це реальна вразливість, що дозволяє отримати несанкціонований доступ до даних, модифікувати або знищити базу даних. Ніколи не будуйте SQL-запити через конкатенацію з даними, що надходять ззовні.",[2964,5865,5866,5869,5870,5872,5873,5875],{},[2971,5867,5868],{},"Рішення:"," ",[2989,5871,3134],{}," з параметрами-заглушками (",[2989,5874,3138],{},"):",[3004,5877,5879],{"className":3541,"code":5878,"language":3543,"meta":3544,"style":3008},"// Безпечно: SQL компілюється окремо від даних\nString sql = \"INSERT INTO authors (id, first_name, last_name, bio, image_path) \" +\n             \"VALUES (?, ?, ?, ?, ?)\";\nPreparedStatement stmt = conn.prepareStatement(sql);\nstmt.setObject(1, author.getId());       // UUID передається як Object\nstmt.setString(2, author.getFirstName()); // рядок — безпечно\nstmt.setString(3, author.getLastName());\nstmt.setString(4, author.getBio());      // може бути null — setString обробляє це\nstmt.setString(5, author.getImagePath());\nstmt.executeUpdate();\n",[2989,5880,5881,5886,5898,5905,5922,5950,5978,6001,6028,6051],{"__ignoreMap":3008},[3012,5882,5883],{"class":3014,"line":3015},[3012,5884,5885],{"class":3206},"// Безпечно: SQL компілюється окремо від даних\n",[3012,5887,5888,5890,5892,5894,5896],{"class":3014,"line":3021},[3012,5889,3734],{"class":3613},[3012,5891,4817],{"class":3635},[3012,5893,3759],{"class":3231},[3012,5895,4822],{"class":3991},[3012,5897,4825],{"class":3231},[3012,5899,5900,5903],{"class":3014,"line":3027},[3012,5901,5902],{"class":3991},"             \"VALUES (?, ?, ?, ?, ?)\"",[3012,5904,3639],{"class":3231},[3012,5906,5907,5909,5911,5913,5915,5917,5920],{"class":3014,"line":3033},[3012,5908,3134],{"class":3613},[3012,5910,4949],{"class":3635},[3012,5912,3759],{"class":3231},[3012,5914,4954],{"class":3635},[3012,5916,3173],{"class":3231},[3012,5918,5919],{"class":3446},"prepareStatement",[3012,5921,4974],{"class":3231},[3012,5923,5924,5926,5928,5931,5933,5936,5938,5940,5942,5944,5947],{"class":3014,"line":3039},[3012,5925,5166],{"class":3635},[3012,5927,3173],{"class":3231},[3012,5929,5930],{"class":3446},"setObject",[3012,5932,3472],{"class":3231},[3012,5934,5935],{"class":3475},"1",[3012,5937,3098],{"class":3231},[3012,5939,4835],{"class":3635},[3012,5941,3173],{"class":3231},[3012,5943,4840],{"class":3446},[3012,5945,5946],{"class":3231},"());       ",[3012,5948,5949],{"class":3206},"// UUID передається як Object\n",[3012,5951,5952,5954,5956,5959,5961,5964,5966,5968,5970,5972,5975],{"class":3014,"line":3045},[3012,5953,5166],{"class":3635},[3012,5955,3173],{"class":3231},[3012,5957,5958],{"class":3446},"setString",[3012,5960,3472],{"class":3231},[3012,5962,5963],{"class":3475},"2",[3012,5965,3098],{"class":3231},[3012,5967,4835],{"class":3635},[3012,5969,3173],{"class":3231},[3012,5971,4857],{"class":3446},[3012,5973,5974],{"class":3231},"()); ",[3012,5976,5977],{"class":3206},"// рядок — безпечно\n",[3012,5979,5980,5982,5984,5986,5988,5991,5993,5995,5997,5999],{"class":3014,"line":3051},[3012,5981,5166],{"class":3635},[3012,5983,3173],{"class":3231},[3012,5985,5958],{"class":3446},[3012,5987,3472],{"class":3231},[3012,5989,5990],{"class":3475},"3",[3012,5992,3098],{"class":3231},[3012,5994,4835],{"class":3635},[3012,5996,3173],{"class":3231},[3012,5998,4872],{"class":3446},[3012,6000,5035],{"class":3231},[3012,6002,6003,6005,6007,6009,6011,6014,6016,6018,6020,6022,6025],{"class":3014,"line":3058},[3012,6004,5166],{"class":3635},[3012,6006,3173],{"class":3231},[3012,6008,5958],{"class":3446},[3012,6010,3472],{"class":3231},[3012,6012,6013],{"class":3475},"4",[3012,6015,3098],{"class":3231},[3012,6017,4835],{"class":3635},[3012,6019,3173],{"class":3231},[3012,6021,4887],{"class":3446},[3012,6023,6024],{"class":3231},"());      ",[3012,6026,6027],{"class":3206},"// може бути null — setString обробляє це\n",[3012,6029,6030,6032,6034,6036,6038,6041,6043,6045,6047,6049],{"class":3014,"line":3064},[3012,6031,5166],{"class":3635},[3012,6033,3173],{"class":3231},[3012,6035,5958],{"class":3446},[3012,6037,3472],{"class":3231},[3012,6039,6040],{"class":3475},"5",[3012,6042,3098],{"class":3231},[3012,6044,4835],{"class":3635},[3012,6046,3173],{"class":3231},[3012,6048,4902],{"class":3446},[3012,6050,5035],{"class":3231},[3012,6052,6053,6055,6057,6059],{"class":3014,"line":3070},[3012,6054,5166],{"class":3635},[3012,6056,3173],{"class":3231},[3012,6058,4971],{"class":3446},[3012,6060,3770],{"class":3231},[2964,6062,6063,6064,6066,6067,6070],{},"У ",[2989,6065,3134],{}," SQL-запит і дані ",[2971,6068,6069],{},"ніколи не поєднуються в одному рядку",". База даних компілює шаблон запиту один раз, а потім підставляє параметри безпечним чином на рівні протоколу. Ніякої конкатенації — ніякої ін'єкції.",[3416,6072],{},[3175,6074,6076],{"id":6075},"проблема-2-витік-ресурсів","Проблема 2: Витік ресурсів",[2964,6078,6079,3098,6081,4570,6083,3116,6085,6087,6088,6091],{},[2989,6080,3112],{},[2989,6082,3142],{},[2989,6084,3150],{},[2989,6086,3119],{}," — це ресурси, що утримують системні дескриптори: TCP-з'єднання, пам'ять сервера, файлові блокування. Якщо їх не закривати явно, відбувається ",[2971,6089,6090],{},"витік ресурсів"," (resource leak).",[2964,6093,6094,6095,6098],{},"У наївній реалізації при виникненні виключення між ",[2989,6096,6097],{},"getConnection()"," та закриттям ресурси залишаються відкритими. Навіть без виключень ресурси закриваються лише тоді, коли збирач сміття знищить об'єкти — а це може статися значно пізніше або взагалі не статися до завершення програми.",[2964,6100,6101,6104],{},[2971,6102,6103],{},"Наслідки:"," вичерпання ліміту підключень до БД, витоки пам'яті, «зависання» таблиць через незакриті транзакції.",[2964,6106,6107,6109,6110,6113],{},[2971,6108,5868],{}," конструкція ",[2989,6111,6112],{},"try-with-resources"," (Java 7+), що гарантує закриття ресурсів незалежно від того, чи виникло виключення:",[3004,6115,6117],{"className":3541,"code":6116,"language":3543,"meta":3544,"style":3008},"// try-with-resources: ресурси закриваються у зворотному порядку\n// після виходу з блоку try — навіть при виключенні\ntry (Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);\n     PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n    stmt.setObject(1, author.getId());\n    stmt.setString(2, author.getFirstName());\n    // ...\n    stmt.executeUpdate();\n\n} // conn.close() та stmt.close() викликаються автоматично тут\n",[2989,6118,6119,6124,6129,6150,6168,6172,6195,6217,6222,6232,6236],{"__ignoreMap":3008},[3012,6120,6121],{"class":3014,"line":3015},[3012,6122,6123],{"class":3206},"// try-with-resources: ресурси закриваються у зворотному порядку\n",[3012,6125,6126],{"class":3014,"line":3021},[3012,6127,6128],{"class":3206},"// після виходу з блоку try — навіть при виключенні\n",[3012,6130,6131,6134,6136,6138,6140,6142,6144,6146,6148],{"class":3014,"line":3027},[3012,6132,6133],{"class":3984},"try",[3012,6135,4336],{"class":3231},[3012,6137,3112],{"class":3613},[3012,6139,4929],{"class":3635},[3012,6141,3759],{"class":3231},[3012,6143,3089],{"class":3635},[3012,6145,3173],{"class":3231},[3012,6147,4938],{"class":3446},[3012,6149,4941],{"class":3231},[3012,6151,6152,6155,6157,6159,6161,6163,6165],{"class":3014,"line":3033},[3012,6153,6154],{"class":3613},"     PreparedStatement",[3012,6156,4949],{"class":3635},[3012,6158,3759],{"class":3231},[3012,6160,4954],{"class":3635},[3012,6162,3173],{"class":3231},[3012,6164,5919],{"class":3446},[3012,6166,6167],{"class":3231},"(sql)) {\n",[3012,6169,6170],{"class":3014,"line":3039},[3012,6171,3055],{"emptyLinePlaceholder":3054},[3012,6173,6174,6177,6179,6181,6183,6185,6187,6189,6191,6193],{"class":3014,"line":3045},[3012,6175,6176],{"class":3635},"    stmt",[3012,6178,3173],{"class":3231},[3012,6180,5930],{"class":3446},[3012,6182,3472],{"class":3231},[3012,6184,5935],{"class":3475},[3012,6186,3098],{"class":3231},[3012,6188,4835],{"class":3635},[3012,6190,3173],{"class":3231},[3012,6192,4840],{"class":3446},[3012,6194,5035],{"class":3231},[3012,6196,6197,6199,6201,6203,6205,6207,6209,6211,6213,6215],{"class":3014,"line":3051},[3012,6198,6176],{"class":3635},[3012,6200,3173],{"class":3231},[3012,6202,5958],{"class":3446},[3012,6204,3472],{"class":3231},[3012,6206,5963],{"class":3475},[3012,6208,3098],{"class":3231},[3012,6210,4835],{"class":3635},[3012,6212,3173],{"class":3231},[3012,6214,4857],{"class":3446},[3012,6216,5035],{"class":3231},[3012,6218,6219],{"class":3014,"line":3058},[3012,6220,6221],{"class":3206},"    // ...\n",[3012,6223,6224,6226,6228,6230],{"class":3014,"line":3064},[3012,6225,6176],{"class":3635},[3012,6227,3173],{"class":3231},[3012,6229,4971],{"class":3446},[3012,6231,3770],{"class":3231},[3012,6233,6234],{"class":3014,"line":3070},[3012,6235,3055],{"emptyLinePlaceholder":3054},[3012,6237,6238,6241],{"class":3014,"line":3076},[3012,6239,6240],{"class":3231},"} ",[3012,6242,6243],{"class":3206},"// conn.close() та stmt.close() викликаються автоматично тут\n",[2964,6245,6246,6247,6249,6250,6253,6254,6256,6257,6259],{},"Зверніть увагу: у ",[2989,6248,6112],{}," можна оголосити кілька ресурсів через крапку з комою. Вони закриваються у ",[2971,6251,6252],{},"зворотному"," порядку оголошення: спочатку ",[2989,6255,5166],{},", потім ",[2989,6258,4954],{},". Це правильний порядок — Statement має бути закритий до Connection.",[3416,6261],{},[3175,6263,6265],{"id":6264},"проблема-3-дублювання-рядка-підключення","Проблема 3: Дублювання рядка підключення",[2964,6267,6268,6269,3098,6272,3098,6275,6278,6279,6282,6283,6286],{},"У наївній реалізації рядок підключення ",[2989,6270,6271],{},"DB_URL",[2989,6273,6274],{},"DB_USER",[2989,6276,6277],{},"DB_PASS"," та виклик ",[2989,6280,6281],{},"DriverManager.getConnection()"," повторюються у ",[2971,6284,6285],{},"кожному"," методі. Якщо завтра потрібно змінити параметри підключення, доведеться виправляти кожен DAO окремо.",[2964,6288,6289,6291,6292,6295],{},[2971,6290,5868],{}," клас ",[2989,6293,6294],{},"ConnectionManager",", що централізує управління підключеннями:",[3004,6297,6299],{"className":3541,"code":6298,"language":3543,"meta":3544,"style":3008},"package com.example.audiobook.db;\n\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\n/**\n * Централізований менеджер з'єднань з базою даних.\n * Єдине місце у проєкті, де знають URL та облікові дані БД.\n * У наступних статтях цей клас еволюціонує до повноцінного Connection Pool.\n */\npublic class ConnectionManager {\n\n    private final String url;\n    private final String user;\n    private final String password;\n\n    public ConnectionManager(String url, String user, String password) {\n        this.url = url;\n        this.user = user;\n        this.password = password;\n    }\n\n    /**\n     * Повертає нове з'єднання з базою даних.\n     * Викликач зобов'язаний закрити з'єднання після використання\n     * (найкраще — через try-with-resources).\n     */\n    public Connection getConnection() {\n        try {\n            return DriverManager.getConnection(url, user, password);\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Неможливо встановити з'єднання з БД: \" + url, e);\n        }\n    }\n\n    /** Стандартний URL для H2 з PostgreSQL-сумісністю */\n    public static ConnectionManager forH2(String dbPath) {\n        String url = \"jdbc:h2:\" + dbPath + \";MODE=PostgreSQL;DB_CLOSE_DELAY=-1\";\n        return new ConnectionManager(url, \"sa\", \"\");\n    }\n}\n",[2989,6300,6301,6308,6312,6319,6326,6333,6337,6341,6346,6351,6356,6360,6371,6375,6388,6401,6414,6418,6444,6456,6468,6480,6484,6488,6492,6497,6502,6507,6511,6523,6529,6544,6558,6576,6580,6584,6588,6593,6613,6632,6651,6655],{"__ignoreMap":3008},[3012,6302,6303,6305],{"class":3014,"line":3015},[3012,6304,3551],{"class":3439},[3012,6306,6307],{"class":3231}," com.example.audiobook.db;\n",[3012,6309,6310],{"class":3014,"line":3021},[3012,6311,3055],{"emptyLinePlaceholder":3054},[3012,6313,6314,6316],{"class":3014,"line":3027},[3012,6315,3563],{"class":3439},[3012,6317,6318],{"class":3231}," java.sql.Connection;\n",[3012,6320,6321,6323],{"class":3014,"line":3033},[3012,6322,3563],{"class":3439},[3012,6324,6325],{"class":3231}," java.sql.DriverManager;\n",[3012,6327,6328,6330],{"class":3014,"line":3039},[3012,6329,3563],{"class":3439},[3012,6331,6332],{"class":3231}," java.sql.SQLException;\n",[3012,6334,6335],{"class":3014,"line":3045},[3012,6336,3055],{"emptyLinePlaceholder":3054},[3012,6338,6339],{"class":3014,"line":3051},[3012,6340,3582],{"class":3206},[3012,6342,6343],{"class":3014,"line":3058},[3012,6344,6345],{"class":3206}," * Централізований менеджер з'єднань з базою даних.\n",[3012,6347,6348],{"class":3014,"line":3064},[3012,6349,6350],{"class":3206}," * Єдине місце у проєкті, де знають URL та облікові дані БД.\n",[3012,6352,6353],{"class":3014,"line":3070},[3012,6354,6355],{"class":3206}," * У наступних статтях цей клас еволюціонує до повноцінного Connection Pool.\n",[3012,6357,6358],{"class":3014,"line":3076},[3012,6359,3602],{"class":3206},[3012,6361,6362,6364,6366,6369],{"class":3014,"line":3320},[3012,6363,3607],{"class":3439},[3012,6365,3610],{"class":3439},[3012,6367,6368],{"class":3613}," ConnectionManager",[3012,6370,3617],{"class":3231},[3012,6372,6373],{"class":3014,"line":3338},[3012,6374,3055],{"emptyLinePlaceholder":3054},[3012,6376,6377,6379,6381,6383,6386],{"class":3014,"line":3356},[3012,6378,3626],{"class":3439},[3012,6380,3629],{"class":3439},[3012,6382,3646],{"class":3613},[3012,6384,6385],{"class":3635}," url",[3012,6387,3639],{"class":3231},[3012,6389,6390,6392,6394,6396,6399],{"class":3014,"line":3365},[3012,6391,3626],{"class":3439},[3012,6393,3629],{"class":3439},[3012,6395,3646],{"class":3613},[3012,6397,6398],{"class":3635}," user",[3012,6400,3639],{"class":3231},[3012,6402,6403,6405,6407,6409,6412],{"class":3014,"line":3665},[3012,6404,3626],{"class":3439},[3012,6406,3629],{"class":3439},[3012,6408,3646],{"class":3613},[3012,6410,6411],{"class":3635}," password",[3012,6413,3639],{"class":3231},[3012,6415,6416],{"class":3014,"line":3677},[3012,6417,3055],{"emptyLinePlaceholder":3054},[3012,6419,6420,6422,6424,6426,6428,6430,6432,6434,6436,6438,6440,6442],{"class":3014,"line":3689},[3012,6421,3727],{"class":3439},[3012,6423,6368],{"class":3446},[3012,6425,3472],{"class":3231},[3012,6427,3734],{"class":3613},[3012,6429,6385],{"class":3635},[3012,6431,3098],{"class":3231},[3012,6433,3734],{"class":3613},[3012,6435,6398],{"class":3635},[3012,6437,3098],{"class":3231},[3012,6439,3734],{"class":3613},[3012,6441,6411],{"class":3635},[3012,6443,3745],{"class":3231},[3012,6445,6446,6448,6450,6453],{"class":3014,"line":3694},[3012,6447,3751],{"class":3439},[3012,6449,3173],{"class":3231},[3012,6451,6452],{"class":3635},"url",[3012,6454,6455],{"class":3231}," = url;\n",[3012,6457,6458,6460,6462,6465],{"class":3014,"line":3700},[3012,6459,3751],{"class":3439},[3012,6461,3173],{"class":3231},[3012,6463,6464],{"class":3635},"user",[3012,6466,6467],{"class":3231}," = user;\n",[3012,6469,6470,6472,6474,6477],{"class":3014,"line":3706},[3012,6471,3751],{"class":3439},[3012,6473,3173],{"class":3231},[3012,6475,6476],{"class":3635},"password",[3012,6478,6479],{"class":3231}," = password;\n",[3012,6481,6482],{"class":3014,"line":3712},[3012,6483,3802],{"class":3231},[3012,6485,6486],{"class":3014,"line":3718},[3012,6487,3055],{"emptyLinePlaceholder":3054},[3012,6489,6490],{"class":3014,"line":3724},[3012,6491,3697],{"class":3206},[3012,6493,6494],{"class":3014,"line":3748},[3012,6495,6496],{"class":3206},"     * Повертає нове з'єднання з базою даних.\n",[3012,6498,6499],{"class":3014,"line":3773},[3012,6500,6501],{"class":3206},"     * Викликач зобов'язаний закрити з'єднання після використання\n",[3012,6503,6504],{"class":3014,"line":3786},[3012,6505,6506],{"class":3206},"     * (найкраще — через try-with-resources).\n",[3012,6508,6509],{"class":3014,"line":3799},[3012,6510,3721],{"class":3206},[3012,6512,6513,6515,6518,6521],{"class":3014,"line":3805},[3012,6514,3727],{"class":3439},[3012,6516,6517],{"class":3613}," Connection",[3012,6519,6520],{"class":3446}," getConnection",[3012,6522,3978],{"class":3231},[3012,6524,6525,6527],{"class":3014,"line":3810},[3012,6526,4914],{"class":3984},[3012,6528,3617],{"class":3231},[3012,6530,6531,6534,6537,6539,6541],{"class":3014,"line":3815},[3012,6532,6533],{"class":3984},"            return",[3012,6535,6536],{"class":3635}," DriverManager",[3012,6538,3173],{"class":3231},[3012,6540,4938],{"class":3446},[3012,6542,6543],{"class":3231},"(url, user, password);\n",[3012,6545,6546,6548,6550,6552,6554,6556],{"class":3014,"line":3821},[3012,6547,4984],{"class":3231},[3012,6549,4987],{"class":3984},[3012,6551,4336],{"class":3231},[3012,6553,4992],{"class":3613},[3012,6555,4995],{"class":3635},[3012,6557,3745],{"class":3231},[3012,6559,6560,6563,6565,6568,6570,6573],{"class":3014,"line":3827},[3012,6561,6562],{"class":3984},"            throw",[3012,6564,5576],{"class":3984},[3012,6566,6567],{"class":3446}," DatabaseException",[3012,6569,3472],{"class":3231},[3012,6571,6572],{"class":3991},"\"Неможливо встановити з'єднання з БД: \"",[3012,6574,6575],{"class":3231}," + url, e);\n",[3012,6577,6578],{"class":3014,"line":3833},[3012,6579,5040],{"class":3231},[3012,6581,6582],{"class":3014,"line":3838},[3012,6583,3802],{"class":3231},[3012,6585,6586],{"class":3014,"line":3865},[3012,6587,3055],{"emptyLinePlaceholder":3054},[3012,6589,6590],{"class":3014,"line":3881},[3012,6591,6592],{"class":3206},"    /** Стандартний URL для H2 з PostgreSQL-сумісністю */\n",[3012,6594,6595,6597,6599,6601,6604,6606,6608,6611],{"class":3014,"line":3893},[3012,6596,3727],{"class":3439},[3012,6598,4707],{"class":3439},[3012,6600,6368],{"class":3613},[3012,6602,6603],{"class":3446}," forH2",[3012,6605,3472],{"class":3231},[3012,6607,3734],{"class":3613},[3012,6609,6610],{"class":3635}," dbPath",[3012,6612,3745],{"class":3231},[3012,6614,6615,6617,6619,6621,6624,6627,6630],{"class":3014,"line":3904},[3012,6616,4814],{"class":3613},[3012,6618,6385],{"class":3635},[3012,6620,3759],{"class":3231},[3012,6622,6623],{"class":3991},"\"jdbc:h2:\"",[3012,6625,6626],{"class":3231}," + dbPath + ",[3012,6628,6629],{"class":3991},"\";MODE=PostgreSQL;DB_CLOSE_DELAY=-1\"",[3012,6631,3639],{"class":3231},[3012,6633,6634,6636,6638,6640,6643,6645,6647,6649],{"class":3014,"line":3915},[3012,6635,3985],{"class":3984},[3012,6637,5576],{"class":3984},[3012,6639,6368],{"class":3446},[3012,6641,6642],{"class":3231},"(url, ",[3012,6644,4742],{"class":3991},[3012,6646,3098],{"class":3231},[3012,6648,4762],{"class":3991},[3012,6650,3531],{"class":3231},[3012,6652,6653],{"class":3014,"line":3928},[3012,6654,3802],{"class":3231},[3012,6656,6657],{"class":3014,"line":3941},[3012,6658,4516],{"class":3231},[3004,6660,6662],{"className":3541,"code":6661,"language":3543,"meta":3544,"style":3008},"package com.example.audiobook.db;\n\n/**\n * Unchecked виняток для помилок рівня бази даних.\n * Обгортає checked SQLException, звільняючи клієнтський код\n * від обов'язкових try-catch блоків.\n */\npublic class DatabaseException extends RuntimeException {\n\n    public DatabaseException(String message, Throwable cause) {\n        super(message, cause);\n    }\n}\n",[2989,6663,6664,6670,6674,6678,6683,6688,6693,6697,6713,6717,6740,6748,6752],{"__ignoreMap":3008},[3012,6665,6666,6668],{"class":3014,"line":3015},[3012,6667,3551],{"class":3439},[3012,6669,6307],{"class":3231},[3012,6671,6672],{"class":3014,"line":3021},[3012,6673,3055],{"emptyLinePlaceholder":3054},[3012,6675,6676],{"class":3014,"line":3027},[3012,6677,3582],{"class":3206},[3012,6679,6680],{"class":3014,"line":3033},[3012,6681,6682],{"class":3206}," * Unchecked виняток для помилок рівня бази даних.\n",[3012,6684,6685],{"class":3014,"line":3039},[3012,6686,6687],{"class":3206}," * Обгортає checked SQLException, звільняючи клієнтський код\n",[3012,6689,6690],{"class":3014,"line":3045},[3012,6691,6692],{"class":3206}," * від обов'язкових try-catch блоків.\n",[3012,6694,6695],{"class":3014,"line":3051},[3012,6696,3602],{"class":3206},[3012,6698,6699,6701,6703,6705,6708,6711],{"class":3014,"line":3058},[3012,6700,3607],{"class":3439},[3012,6702,3610],{"class":3439},[3012,6704,6567],{"class":3613},[3012,6706,6707],{"class":3439}," extends",[3012,6709,6710],{"class":3613}," RuntimeException",[3012,6712,3617],{"class":3231},[3012,6714,6715],{"class":3014,"line":3064},[3012,6716,3055],{"emptyLinePlaceholder":3054},[3012,6718,6719,6721,6723,6725,6727,6730,6732,6735,6738],{"class":3014,"line":3070},[3012,6720,3727],{"class":3439},[3012,6722,6567],{"class":3446},[3012,6724,3472],{"class":3231},[3012,6726,3734],{"class":3613},[3012,6728,6729],{"class":3635}," message",[3012,6731,3098],{"class":3231},[3012,6733,6734],{"class":3613},"Throwable",[3012,6736,6737],{"class":3635}," cause",[3012,6739,3745],{"class":3231},[3012,6741,6742,6745],{"class":3014,"line":3076},[3012,6743,6744],{"class":3439},"        super",[3012,6746,6747],{"class":3231},"(message, cause);\n",[3012,6749,6750],{"class":3014,"line":3320},[3012,6751,3802],{"class":3231},[3012,6753,6754],{"class":3014,"line":3338},[3012,6755,4516],{"class":3231},[2964,6757,6758,6759,6762,6763,6765,6766,6769,6770,6772,6773,3173],{},"Використання ",[2989,6760,6761],{},"RuntimeException"," замість перевірки кожного ",[2989,6764,4992],{}," є свідомим архітектурним рішенням: помилки бази даних у більшості випадків є фатальними для поточної операції, і примусова обробка ",[2989,6767,6768],{},"checked"," виключень лише засмічує код. DAO-шар перехоплює ",[2989,6771,4992],{}," і перетворює її на ",[2989,6774,6775],{},"DatabaseException",[3416,6777],{},[3175,6779,6781],{"id":6780},"проблема-4-мовчазний-збій","Проблема 4: «Мовчазний» збій",[2964,6783,6784,6785,6787,6788,6791],{},"У наївній реалізації блок ",[2989,6786,4987],{}," лише друкує повідомлення в ",[2989,6789,6790],{},"stderr"," і продовжує виконання:",[3004,6793,6795],{"className":3541,"code":6794,"language":3543,"meta":3008,"style":3008},"} catch (SQLException e) {\n    System.err.println(\"Помилка збереження: \" + e.getMessage());\n    // Метод повертає normally — але збереження не відбулося!\n}\n",[2989,6796,6797,6811,6838,6843],{"__ignoreMap":3008},[3012,6798,6799,6801,6803,6805,6807,6809],{"class":3014,"line":3015},[3012,6800,6240],{"class":3231},[3012,6802,4987],{"class":3984},[3012,6804,4336],{"class":3231},[3012,6806,4992],{"class":3613},[3012,6808,4995],{"class":3635},[3012,6810,3745],{"class":3231},[3012,6812,6813,6816,6818,6820,6822,6824,6826,6828,6830,6832,6834,6836],{"class":3014,"line":3021},[3012,6814,6815],{"class":3635},"    System",[3012,6817,3173],{"class":3231},[3012,6819,5012],{"class":3635},[3012,6821,3173],{"class":3231},[3012,6823,5017],{"class":3446},[3012,6825,3472],{"class":3231},[3012,6827,5022],{"class":3991},[3012,6829,4494],{"class":3231},[3012,6831,5027],{"class":3635},[3012,6833,3173],{"class":3231},[3012,6835,5032],{"class":3446},[3012,6837,5035],{"class":3231},[3012,6839,6840],{"class":3014,"line":3027},[3012,6841,6842],{"class":3206},"    // Метод повертає normally — але збереження не відбулося!\n",[3012,6844,6845],{"class":3014,"line":3033},[3012,6846,4516],{"class":3231},[2964,6848,6849,6850,6852,6853,6856],{},"Клієнтський код при цьому вважає, що ",[2989,6851,5727],{}," завершився успішно. Це ",[2971,6854,6855],{},"silent failure"," — одна з найнебезпечніших ситуацій у програмуванні, оскільки помилка непомітно поширюється і виявляється значно пізніше, у неочікуваному місці.",[2964,6858,6859,6861,6862,6864,6865,6867],{},[2971,6860,5868],{}," перетворення ",[2989,6863,4992],{}," на ",[2989,6866,6761],{}," і дозвіл їй поширюватися вверх по стеку:",[3004,6869,6871],{"className":3541,"code":6870,"language":3543,"meta":3544,"style":3008},"public void save(Author author) {\n    String sql = \"INSERT INTO authors (id, first_name, last_name, bio, image_path) \" +\n                 \"VALUES (?, ?, ?, ?, ?)\";\n    try (Connection conn = connectionManager.getConnection();\n         PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n        stmt.setObject(1, author.getId());\n        stmt.setString(2, author.getFirstName());\n        stmt.setString(3, author.getLastName());\n        stmt.setString(4, author.getBio());\n        stmt.setString(5, author.getImagePath());\n        stmt.executeUpdate();\n\n    } catch (SQLException e) {\n        // Перетворюємо checked на unchecked — збій не замовчується\n        throw new DatabaseException(\"Помилка збереження автора: \" + author, e);\n    }\n}\n",[2989,6872,6873,6888,6901,6908,6930,6947,6951,6974,6996,7018,7040,7062,7072,7076,7091,7096,7113,7117],{"__ignoreMap":3008},[3012,6874,6875,6877,6879,6881,6883,6885],{"class":3014,"line":3015},[3012,6876,3607],{"class":3439},[3012,6878,4166],{"class":3613},[3012,6880,4795],{"class":3446},[3012,6882,3472],{"class":3231},[3012,6884,3537],{"class":3613},[3012,6886,6887],{"class":3231}," author) {\n",[3012,6889,6890,6893,6895,6897,6899],{"class":3014,"line":3021},[3012,6891,6892],{"class":3613},"    String",[3012,6894,4817],{"class":3635},[3012,6896,3759],{"class":3231},[3012,6898,4822],{"class":3991},[3012,6900,4825],{"class":3231},[3012,6902,6903,6906],{"class":3014,"line":3027},[3012,6904,6905],{"class":3991},"                 \"VALUES (?, ?, ?, ?, ?)\"",[3012,6907,3639],{"class":3231},[3012,6909,6910,6913,6915,6917,6919,6921,6924,6926,6928],{"class":3014,"line":3033},[3012,6911,6912],{"class":3984},"    try",[3012,6914,4336],{"class":3231},[3012,6916,3112],{"class":3613},[3012,6918,4929],{"class":3635},[3012,6920,3759],{"class":3231},[3012,6922,6923],{"class":3635},"connectionManager",[3012,6925,3173],{"class":3231},[3012,6927,4938],{"class":3446},[3012,6929,3770],{"class":3231},[3012,6931,6932,6935,6937,6939,6941,6943,6945],{"class":3014,"line":3039},[3012,6933,6934],{"class":3613},"         PreparedStatement",[3012,6936,4949],{"class":3635},[3012,6938,3759],{"class":3231},[3012,6940,4954],{"class":3635},[3012,6942,3173],{"class":3231},[3012,6944,5919],{"class":3446},[3012,6946,6167],{"class":3231},[3012,6948,6949],{"class":3014,"line":3045},[3012,6950,3055],{"emptyLinePlaceholder":3054},[3012,6952,6953,6956,6958,6960,6962,6964,6966,6968,6970,6972],{"class":3014,"line":3051},[3012,6954,6955],{"class":3635},"        stmt",[3012,6957,3173],{"class":3231},[3012,6959,5930],{"class":3446},[3012,6961,3472],{"class":3231},[3012,6963,5935],{"class":3475},[3012,6965,3098],{"class":3231},[3012,6967,4835],{"class":3635},[3012,6969,3173],{"class":3231},[3012,6971,4840],{"class":3446},[3012,6973,5035],{"class":3231},[3012,6975,6976,6978,6980,6982,6984,6986,6988,6990,6992,6994],{"class":3014,"line":3058},[3012,6977,6955],{"class":3635},[3012,6979,3173],{"class":3231},[3012,6981,5958],{"class":3446},[3012,6983,3472],{"class":3231},[3012,6985,5963],{"class":3475},[3012,6987,3098],{"class":3231},[3012,6989,4835],{"class":3635},[3012,6991,3173],{"class":3231},[3012,6993,4857],{"class":3446},[3012,6995,5035],{"class":3231},[3012,6997,6998,7000,7002,7004,7006,7008,7010,7012,7014,7016],{"class":3014,"line":3064},[3012,6999,6955],{"class":3635},[3012,7001,3173],{"class":3231},[3012,7003,5958],{"class":3446},[3012,7005,3472],{"class":3231},[3012,7007,5990],{"class":3475},[3012,7009,3098],{"class":3231},[3012,7011,4835],{"class":3635},[3012,7013,3173],{"class":3231},[3012,7015,4872],{"class":3446},[3012,7017,5035],{"class":3231},[3012,7019,7020,7022,7024,7026,7028,7030,7032,7034,7036,7038],{"class":3014,"line":3070},[3012,7021,6955],{"class":3635},[3012,7023,3173],{"class":3231},[3012,7025,5958],{"class":3446},[3012,7027,3472],{"class":3231},[3012,7029,6013],{"class":3475},[3012,7031,3098],{"class":3231},[3012,7033,4835],{"class":3635},[3012,7035,3173],{"class":3231},[3012,7037,4887],{"class":3446},[3012,7039,5035],{"class":3231},[3012,7041,7042,7044,7046,7048,7050,7052,7054,7056,7058,7060],{"class":3014,"line":3076},[3012,7043,6955],{"class":3635},[3012,7045,3173],{"class":3231},[3012,7047,5958],{"class":3446},[3012,7049,3472],{"class":3231},[3012,7051,6040],{"class":3475},[3012,7053,3098],{"class":3231},[3012,7055,4835],{"class":3635},[3012,7057,3173],{"class":3231},[3012,7059,4902],{"class":3446},[3012,7061,5035],{"class":3231},[3012,7063,7064,7066,7068,7070],{"class":3014,"line":3320},[3012,7065,6955],{"class":3635},[3012,7067,3173],{"class":3231},[3012,7069,4971],{"class":3446},[3012,7071,3770],{"class":3231},[3012,7073,7074],{"class":3014,"line":3338},[3012,7075,3055],{"emptyLinePlaceholder":3054},[3012,7077,7078,7081,7083,7085,7087,7089],{"class":3014,"line":3356},[3012,7079,7080],{"class":3231},"    } ",[3012,7082,4987],{"class":3984},[3012,7084,4336],{"class":3231},[3012,7086,4992],{"class":3613},[3012,7088,4995],{"class":3635},[3012,7090,3745],{"class":3231},[3012,7092,7093],{"class":3014,"line":3365},[3012,7094,7095],{"class":3206},"        // Перетворюємо checked на unchecked — збій не замовчується\n",[3012,7097,7098,7101,7103,7105,7107,7110],{"class":3014,"line":3665},[3012,7099,7100],{"class":3984},"        throw",[3012,7102,5576],{"class":3984},[3012,7104,6567],{"class":3446},[3012,7106,3472],{"class":3231},[3012,7108,7109],{"class":3991},"\"Помилка збереження автора: \"",[3012,7111,7112],{"class":3231}," + author, e);\n",[3012,7114,7115],{"class":3014,"line":3677},[3012,7116,3802],{"class":3231},[3012,7118,7119],{"class":3014,"line":3689},[3012,7120,4516],{"class":3231},[3416,7122],{},[2959,7124,7126],{"id":7125},"виправлена-реалізація-authordao","Виправлена реалізація: AuthorDao",[2964,7128,7129,7130,3098,7132,3098,7134,4570,7136,5728],{},"Тепер, розуміючи всі чотири проблеми, напишемо виправлену версію DAO. Вона використовує ",[2989,7131,3134],{},[2989,7133,6112],{},[2989,7135,6294],{},[2989,7137,6775],{},[3004,7139,7141],{"className":3541,"code":7140,"language":3543,"meta":3544,"style":3008},"package com.example.audiobook.dao;\n\nimport com.example.audiobook.db.ConnectionManager;\nimport com.example.audiobook.db.DatabaseException;\nimport com.example.audiobook.domain.Author;\n\nimport java.sql.*;\nimport java.util.ArrayList;\nimport java.util.List;\nimport java.util.Optional;\nimport java.util.UUID;\n\n/**\n * DAO для роботи з таблицею authors.\n * Виправлена версія: PreparedStatement, try-with-resources,\n * централізоване підключення, правильна обробка помилок.\n */\npublic class AuthorDao {\n\n    private final ConnectionManager connectionManager;\n\n    public AuthorDao(ConnectionManager connectionManager) {\n        this.connectionManager = connectionManager;\n    }\n\n    /**\n     * Зберігає нового автора у таблиці authors.\n     * Якщо автор з таким id вже існує — викидає виключення (порушення PK).\n     */\n    public void save(Author author) {\n        String sql = \"\"\"\n            INSERT INTO authors (id, first_name, last_name, bio, image_path)\n            VALUES (?, ?, ?, ?, ?)\n            \"\"\";\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            stmt.setObject(1, author.getId());        // UUID → java.util.UUID\n            stmt.setString(2, author.getFirstName());\n            stmt.setString(3, author.getLastName());\n            stmt.setString(4, author.getBio());       // null-safe: setString(i, null) → SQL NULL\n            stmt.setString(5, author.getImagePath()); // null-safe\n\n            int rowsAffected = stmt.executeUpdate();\n            if (rowsAffected != 1) {\n                throw new DatabaseException(\"Очікувався 1 рядок, вставлено: \" + rowsAffected, null);\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка збереження автора: \" + author.getId(), e);\n        }\n    }\n\n    /**\n     * Знаходить автора за UUID-ідентифікатором.\n     * Повертає Optional.empty() якщо автора не знайдено.\n     */\n    public Optional\u003CAuthor> findById(UUID id) {\n        String sql = \"\"\"\n            SELECT id, first_name, last_name, bio, image_path\n            FROM authors\n            WHERE id = ?\n            \"\"\";\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            stmt.setObject(1, id);\n\n            try (ResultSet rs = stmt.executeQuery()) {\n                // ResultSet відкривається всередині try-with-resources stmt,\n                // тому його закриваємо окремим вкладеним блоком\n                if (rs.next()) {\n                    return Optional.of(mapRow(rs));\n                }\n                return Optional.empty();\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка пошуку автора за id=\" + id, e);\n        }\n    }\n\n    /**\n     * Повертає всіх авторів, відсортованих за прізвищем та ім'ям.\n     */\n    public List\u003CAuthor> findAll() {\n        String sql = \"\"\"\n            SELECT id, first_name, last_name, bio, image_path\n            FROM authors\n            ORDER BY last_name, first_name\n            \"\"\";\n        List\u003CAuthor> authors = new ArrayList\u003C>();\n\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql);\n             ResultSet rs = stmt.executeQuery()) {\n            // ResultSet без параметрів можна відкрити одразу у try-with-resources\n\n            while (rs.next()) {\n                authors.add(mapRow(rs));\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка отримання списку авторів\", e);\n        }\n        return authors;\n    }\n\n    /**\n     * Знаходить авторів за частиною прізвища (регістр-незалежний пошук).\n     */\n    public List\u003CAuthor> findByLastName(String lastNamePart) {\n        String sql = \"\"\"\n            SELECT id, first_name, last_name, bio, image_path\n            FROM authors\n            WHERE LOWER(last_name) LIKE LOWER(?)\n            ORDER BY last_name, first_name\n            \"\"\";\n        List\u003CAuthor> authors = new ArrayList\u003C>();\n\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            // % — SQL-шаблон \"будь-яка кількість символів\"\n            stmt.setString(1, \"%\" + lastNamePart + \"%\");\n\n            try (ResultSet rs = stmt.executeQuery()) {\n                while (rs.next()) {\n                    authors.add(mapRow(rs));\n                }\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка пошуку авторів за прізвищем: \" + lastNamePart, e);\n        }\n        return authors;\n    }\n\n    /**\n     * Оновлює дані існуючого автора.\n     * Оновлює всі поля, крім незмінного id.\n     */\n    public void update(Author author) {\n        String sql = \"\"\"\n            UPDATE authors\n            SET first_name = ?,\n                last_name  = ?,\n                bio        = ?,\n                image_path = ?\n            WHERE id = ?\n            \"\"\";\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            stmt.setString(1, author.getFirstName());\n            stmt.setString(2, author.getLastName());\n            stmt.setString(3, author.getBio());\n            stmt.setString(4, author.getImagePath());\n            stmt.setObject(5, author.getId()); // id — в умові WHERE, останній параметр\n\n            int rowsAffected = stmt.executeUpdate();\n            if (rowsAffected == 0) {\n                // Автор з таким id не існує — це логічна помилка клієнтського коду\n                throw new DatabaseException(\n                    \"Автора з id=\" + author.getId() + \" не знайдено для оновлення\", null\n                );\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка оновлення автора: \" + author.getId(), e);\n        }\n    }\n\n    /**\n     * Видаляє автора за ідентифікатором.\n     * Завдяки ON DELETE CASCADE у схемі, всі пов'язані audiobooks\n     * також будуть видалені автоматично.\n     *\n     * @return true — якщо автора було знайдено та видалено\n     */\n    public boolean deleteById(UUID id) {\n        String sql = \"DELETE FROM authors WHERE id = ?\";\n\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            stmt.setObject(1, id);\n            int rowsAffected = stmt.executeUpdate();\n            return rowsAffected > 0; // false якщо автора з таким id не існувало\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка видалення автора з id=\" + id, e);\n        }\n    }\n\n    /**\n     * Перевіряє існування автора за id без завантаження всіх даних.\n     * Ефективніше за findById() + isPresent() — не передає дані по мережі.\n     */\n    public boolean existsById(UUID id) {\n        String sql = \"SELECT 1 FROM authors WHERE id = ? LIMIT 1\";\n\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql)) {\n\n            stmt.setObject(1, id);\n            try (ResultSet rs = stmt.executeQuery()) {\n                return rs.next(); // true — якщо хоча б один рядок є\n            }\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка перевірки існування автора: \" + id, e);\n        }\n    }\n\n    /**\n     * Повертає кількість авторів у таблиці.\n     * Використовує COUNT(*) — найефективніший спосіб підрахунку рядків.\n     */\n    public long count() {\n        String sql = \"SELECT COUNT(*) FROM authors\";\n\n        try (Connection conn = connectionManager.getConnection();\n             PreparedStatement stmt = conn.prepareStatement(sql);\n             ResultSet rs = stmt.executeQuery()) {\n\n            rs.next();\n            return rs.getLong(1); // Перший (і єдиний) стовпець результату\n\n        } catch (SQLException e) {\n            throw new DatabaseException(\"Помилка підрахунку авторів\", e);\n        }\n    }\n\n    /**\n     * Приватний метод маппінгу ResultSet → Author.\n     * Централізований у одному місці — зміна структури таблиці\n     * вимагає зміни лише тут.\n     */\n    private Author mapRow(ResultSet rs) throws SQLException {\n        return new Author(\n            rs.getObject(\"id\", UUID.class),  // Типізований getObject для UUID\n            rs.getString(\"first_name\"),\n            rs.getString(\"last_name\"),\n            rs.getString(\"bio\"),             // Повертає null якщо стовпець NULL\n            rs.getString(\"image_path\")       // Повертає null якщо стовпець NULL\n        );\n    }\n}\n",[2989,7142,7143,7149,7153,7160,7167,7173,7177,7183,7189,7195,7201,7207,7211,7215,7220,7225,7230,7234,7245,7249,7262,7266,7280,7291,7295,7299,7303,7308,7313,7317,7333,7344,7349,7354,7361,7381,7398,7402,7428,7450,7472,7497,7522,7526,7544,7555,7576,7580,7584,7598,7621,7625,7629,7633,7637,7642,7647,7651,7673,7683,7688,7693,7698,7704,7724,7740,7744,7759,7763,7784,7789,7794,7809,7826,7831,7843,7847,7851,7865,7881,7885,7889,7893,7897,7902,7906,7922,7932,7936,7940,7945,7951,7971,7975,7995,8011,8028,8033,8037,8051,8065,8069,8073,8088,8105,8110,8117,8122,8127,8132,8138,8143,8168,8179,8184,8189,8195,8200,8207,8228,8233,8254,8271,8276,8282,8307,8312,8333,8349,8365,8370,8375,8380,8395,8412,8417,8424,8429,8434,8439,8445,8451,8456,8474,8485,8491,8497,8503,8509,8515,8520,8527,8548,8565,8570,8593,8616,8639,8662,8688,8693,8710,8723,8729,8740,8764,8770,8775,8780,8795,8819,8824,8829,8834,8839,8845,8851,8857,8863,8875,8880,8898,8912,8917,8938,8955,8960,8975,8992,9007,9012,9027,9043,9048,9053,9058,9063,9069,9075,9080,9098,9112,9117,9138,9155,9160,9175,9196,9213,9218,9223,9238,9254,9259,9264,9269,9274,9280,9286,9291,9304,9318,9323,9344,9361,9378,9383,9394,9415,9420,9435,9451,9456,9461,9466,9471,9477,9483,9489,9494,9517,9528,9555,9570,9585,9604,9622,9627,9632],{"__ignoreMap":3008},[3012,7144,7145,7147],{"class":3014,"line":3015},[3012,7146,3551],{"class":3439},[3012,7148,4604],{"class":3231},[3012,7150,7151],{"class":3014,"line":3021},[3012,7152,3055],{"emptyLinePlaceholder":3054},[3012,7154,7155,7157],{"class":3014,"line":3027},[3012,7156,3563],{"class":3439},[3012,7158,7159],{"class":3231}," com.example.audiobook.db.ConnectionManager;\n",[3012,7161,7162,7164],{"class":3014,"line":3033},[3012,7163,3563],{"class":3439},[3012,7165,7166],{"class":3231}," com.example.audiobook.db.DatabaseException;\n",[3012,7168,7169,7171],{"class":3014,"line":3039},[3012,7170,3563],{"class":3439},[3012,7172,4615],{"class":3231},[3012,7174,7175],{"class":3014,"line":3045},[3012,7176,3055],{"emptyLinePlaceholder":3054},[3012,7178,7179,7181],{"class":3014,"line":3051},[3012,7180,3563],{"class":3439},[3012,7182,4626],{"class":3231},[3012,7184,7185,7187],{"class":3014,"line":3058},[3012,7186,3563],{"class":3439},[3012,7188,4633],{"class":3231},[3012,7190,7191,7193],{"class":3014,"line":3064},[3012,7192,3563],{"class":3439},[3012,7194,4640],{"class":3231},[3012,7196,7197,7199],{"class":3014,"line":3070},[3012,7198,3563],{"class":3439},[3012,7200,4647],{"class":3231},[3012,7202,7203,7205],{"class":3014,"line":3076},[3012,7204,3563],{"class":3439},[3012,7206,3573],{"class":3231},[3012,7208,7209],{"class":3014,"line":3320},[3012,7210,3055],{"emptyLinePlaceholder":3054},[3012,7212,7213],{"class":3014,"line":3338},[3012,7214,3582],{"class":3206},[3012,7216,7217],{"class":3014,"line":3356},[3012,7218,7219],{"class":3206}," * DAO для роботи з таблицею authors.\n",[3012,7221,7222],{"class":3014,"line":3365},[3012,7223,7224],{"class":3206}," * Виправлена версія: PreparedStatement, try-with-resources,\n",[3012,7226,7227],{"class":3014,"line":3665},[3012,7228,7229],{"class":3206}," * централізоване підключення, правильна обробка помилок.\n",[3012,7231,7232],{"class":3014,"line":3677},[3012,7233,3602],{"class":3206},[3012,7235,7236,7238,7240,7243],{"class":3014,"line":3689},[3012,7237,3607],{"class":3439},[3012,7239,3610],{"class":3439},[3012,7241,7242],{"class":3613}," AuthorDao",[3012,7244,3617],{"class":3231},[3012,7246,7247],{"class":3014,"line":3694},[3012,7248,3055],{"emptyLinePlaceholder":3054},[3012,7250,7251,7253,7255,7257,7260],{"class":3014,"line":3700},[3012,7252,3626],{"class":3439},[3012,7254,3629],{"class":3439},[3012,7256,6368],{"class":3613},[3012,7258,7259],{"class":3635}," connectionManager",[3012,7261,3639],{"class":3231},[3012,7263,7264],{"class":3014,"line":3706},[3012,7265,3055],{"emptyLinePlaceholder":3054},[3012,7267,7268,7270,7272,7274,7276,7278],{"class":3014,"line":3712},[3012,7269,3727],{"class":3439},[3012,7271,7242],{"class":3446},[3012,7273,3472],{"class":3231},[3012,7275,6294],{"class":3613},[3012,7277,7259],{"class":3635},[3012,7279,3745],{"class":3231},[3012,7281,7282,7284,7286,7288],{"class":3014,"line":3718},[3012,7283,3751],{"class":3439},[3012,7285,3173],{"class":3231},[3012,7287,6923],{"class":3635},[3012,7289,7290],{"class":3231}," = connectionManager;\n",[3012,7292,7293],{"class":3014,"line":3724},[3012,7294,3802],{"class":3231},[3012,7296,7297],{"class":3014,"line":3748},[3012,7298,3055],{"emptyLinePlaceholder":3054},[3012,7300,7301],{"class":3014,"line":3773},[3012,7302,3697],{"class":3206},[3012,7304,7305],{"class":3014,"line":3786},[3012,7306,7307],{"class":3206},"     * Зберігає нового автора у таблиці authors.\n",[3012,7309,7310],{"class":3014,"line":3799},[3012,7311,7312],{"class":3206},"     * Якщо автор з таким id вже існує — викидає виключення (порушення PK).\n",[3012,7314,7315],{"class":3014,"line":3805},[3012,7316,3721],{"class":3206},[3012,7318,7319,7321,7323,7325,7327,7329,7331],{"class":3014,"line":3810},[3012,7320,3727],{"class":3439},[3012,7322,4166],{"class":3613},[3012,7324,4795],{"class":3446},[3012,7326,3472],{"class":3231},[3012,7328,3537],{"class":3613},[3012,7330,4802],{"class":3635},[3012,7332,3745],{"class":3231},[3012,7334,7335,7337,7339,7341],{"class":3014,"line":3815},[3012,7336,4814],{"class":3613},[3012,7338,4817],{"class":3635},[3012,7340,3759],{"class":3231},[3012,7342,7343],{"class":3991},"\"\"\"\n",[3012,7345,7346],{"class":3014,"line":3821},[3012,7347,7348],{"class":3991},"            INSERT INTO authors (id, first_name, last_name, bio, image_path)\n",[3012,7350,7351],{"class":3014,"line":3827},[3012,7352,7353],{"class":3991},"            VALUES (?, ?, ?, ?, ?)\n",[3012,7355,7356,7359],{"class":3014,"line":3833},[3012,7357,7358],{"class":3991},"            \"\"\"",[3012,7360,3639],{"class":3231},[3012,7362,7363,7365,7367,7369,7371,7373,7375,7377,7379],{"class":3014,"line":3838},[3012,7364,4914],{"class":3984},[3012,7366,4336],{"class":3231},[3012,7368,3112],{"class":3613},[3012,7370,4929],{"class":3635},[3012,7372,3759],{"class":3231},[3012,7374,6923],{"class":3635},[3012,7376,3173],{"class":3231},[3012,7378,4938],{"class":3446},[3012,7380,3770],{"class":3231},[3012,7382,7383,7386,7388,7390,7392,7394,7396],{"class":3014,"line":3865},[3012,7384,7385],{"class":3613},"             PreparedStatement",[3012,7387,4949],{"class":3635},[3012,7389,3759],{"class":3231},[3012,7391,4954],{"class":3635},[3012,7393,3173],{"class":3231},[3012,7395,5919],{"class":3446},[3012,7397,6167],{"class":3231},[3012,7399,7400],{"class":3014,"line":3881},[3012,7401,3055],{"emptyLinePlaceholder":3054},[3012,7403,7404,7406,7408,7410,7412,7414,7416,7418,7420,7422,7425],{"class":3014,"line":3893},[3012,7405,4966],{"class":3635},[3012,7407,3173],{"class":3231},[3012,7409,5930],{"class":3446},[3012,7411,3472],{"class":3231},[3012,7413,5935],{"class":3475},[3012,7415,3098],{"class":3231},[3012,7417,4835],{"class":3635},[3012,7419,3173],{"class":3231},[3012,7421,4840],{"class":3446},[3012,7423,7424],{"class":3231},"());        ",[3012,7426,7427],{"class":3206},"// UUID → java.util.UUID\n",[3012,7429,7430,7432,7434,7436,7438,7440,7442,7444,7446,7448],{"class":3014,"line":3904},[3012,7431,4966],{"class":3635},[3012,7433,3173],{"class":3231},[3012,7435,5958],{"class":3446},[3012,7437,3472],{"class":3231},[3012,7439,5963],{"class":3475},[3012,7441,3098],{"class":3231},[3012,7443,4835],{"class":3635},[3012,7445,3173],{"class":3231},[3012,7447,4857],{"class":3446},[3012,7449,5035],{"class":3231},[3012,7451,7452,7454,7456,7458,7460,7462,7464,7466,7468,7470],{"class":3014,"line":3915},[3012,7453,4966],{"class":3635},[3012,7455,3173],{"class":3231},[3012,7457,5958],{"class":3446},[3012,7459,3472],{"class":3231},[3012,7461,5990],{"class":3475},[3012,7463,3098],{"class":3231},[3012,7465,4835],{"class":3635},[3012,7467,3173],{"class":3231},[3012,7469,4872],{"class":3446},[3012,7471,5035],{"class":3231},[3012,7473,7474,7476,7478,7480,7482,7484,7486,7488,7490,7492,7494],{"class":3014,"line":3928},[3012,7475,4966],{"class":3635},[3012,7477,3173],{"class":3231},[3012,7479,5958],{"class":3446},[3012,7481,3472],{"class":3231},[3012,7483,6013],{"class":3475},[3012,7485,3098],{"class":3231},[3012,7487,4835],{"class":3635},[3012,7489,3173],{"class":3231},[3012,7491,4887],{"class":3446},[3012,7493,5946],{"class":3231},[3012,7495,7496],{"class":3206},"// null-safe: setString(i, null) → SQL NULL\n",[3012,7498,7499,7501,7503,7505,7507,7509,7511,7513,7515,7517,7519],{"class":3014,"line":3941},[3012,7500,4966],{"class":3635},[3012,7502,3173],{"class":3231},[3012,7504,5958],{"class":3446},[3012,7506,3472],{"class":3231},[3012,7508,6040],{"class":3475},[3012,7510,3098],{"class":3231},[3012,7512,4835],{"class":3635},[3012,7514,3173],{"class":3231},[3012,7516,4902],{"class":3446},[3012,7518,5974],{"class":3231},[3012,7520,7521],{"class":3206},"// null-safe\n",[3012,7523,7524],{"class":3014,"line":3946},[3012,7525,3055],{"emptyLinePlaceholder":3054},[3012,7527,7528,7531,7534,7536,7538,7540,7542],{"class":3014,"line":3951},[3012,7529,7530],{"class":3613},"            int",[3012,7532,7533],{"class":3635}," rowsAffected",[3012,7535,3759],{"class":3231},[3012,7537,5166],{"class":3635},[3012,7539,3173],{"class":3231},[3012,7541,4971],{"class":3446},[3012,7543,3770],{"class":3231},[3012,7545,7546,7548,7551,7553],{"class":3014,"line":3957},[3012,7547,5182],{"class":3984},[3012,7549,7550],{"class":3231}," (rowsAffected != ",[3012,7552,5935],{"class":3475},[3012,7554,3745],{"class":3231},[3012,7556,7557,7560,7562,7564,7566,7569,7572,7574],{"class":3014,"line":3962},[3012,7558,7559],{"class":3984},"                throw",[3012,7561,5576],{"class":3984},[3012,7563,6567],{"class":3446},[3012,7565,3472],{"class":3231},[3012,7567,7568],{"class":3991},"\"Очікувався 1 рядок, вставлено: \"",[3012,7570,7571],{"class":3231}," + rowsAffected, ",[3012,7573,4035],{"class":3439},[3012,7575,3531],{"class":3231},[3012,7577,7578],{"class":3014,"line":3968},[3012,7579,5235],{"class":3231},[3012,7581,7582],{"class":3014,"line":3981},[3012,7583,3055],{"emptyLinePlaceholder":3054},[3012,7585,7586,7588,7590,7592,7594,7596],{"class":3014,"line":3998},[3012,7587,4984],{"class":3231},[3012,7589,4987],{"class":3984},[3012,7591,4336],{"class":3231},[3012,7593,4992],{"class":3613},[3012,7595,4995],{"class":3635},[3012,7597,3745],{"class":3231},[3012,7599,7600,7602,7604,7606,7608,7610,7612,7614,7616,7618],{"class":3014,"line":4003},[3012,7601,6562],{"class":3984},[3012,7603,5576],{"class":3984},[3012,7605,6567],{"class":3446},[3012,7607,3472],{"class":3231},[3012,7609,7109],{"class":3991},[3012,7611,4494],{"class":3231},[3012,7613,4835],{"class":3635},[3012,7615,3173],{"class":3231},[3012,7617,4840],{"class":3446},[3012,7619,7620],{"class":3231},"(), e);\n",[3012,7622,7623],{"class":3014,"line":4008},[3012,7624,5040],{"class":3231},[3012,7626,7627],{"class":3014,"line":4014},[3012,7628,3802],{"class":3231},[3012,7630,7631],{"class":3014,"line":4027},[3012,7632,3055],{"emptyLinePlaceholder":3054},[3012,7634,7635],{"class":3014,"line":4050},[3012,7636,3697],{"class":3206},[3012,7638,7639],{"class":3014,"line":4055},[3012,7640,7641],{"class":3206},"     * Знаходить автора за UUID-ідентифікатором.\n",[3012,7643,7644],{"class":3014,"line":4060},[3012,7645,7646],{"class":3206},"     * Повертає Optional.empty() якщо автора не знайдено.\n",[3012,7648,7649],{"class":3014,"line":4066},[3012,7650,3721],{"class":3206},[3012,7652,7653,7655,7657,7659,7661,7663,7665,7667,7669,7671],{"class":3014,"line":4085},[3012,7654,3727],{"class":3439},[3012,7656,5068],{"class":3613},[3012,7658,3194],{"class":3231},[3012,7660,3537],{"class":3613},[3012,7662,5075],{"class":3231},[3012,7664,5078],{"class":3446},[3012,7666,3472],{"class":3231},[3012,7668,3762],{"class":3613},[3012,7670,3636],{"class":3635},[3012,7672,3745],{"class":3231},[3012,7674,7675,7677,7679,7681],{"class":3014,"line":4103},[3012,7676,4814],{"class":3613},[3012,7678,4817],{"class":3635},[3012,7680,3759],{"class":3231},[3012,7682,7343],{"class":3991},[3012,7684,7685],{"class":3014,"line":4121},[3012,7686,7687],{"class":3991},"            SELECT id, first_name, last_name, bio, image_path\n",[3012,7689,7690],{"class":3014,"line":4139},[3012,7691,7692],{"class":3991},"            FROM authors\n",[3012,7694,7695],{"class":3014,"line":4156},[3012,7696,7697],{"class":3991},"            WHERE id = ?\n",[3012,7699,7700,7702],{"class":3014,"line":4161},[3012,7701,7358],{"class":3991},[3012,7703,3639],{"class":3231},[3012,7705,7706,7708,7710,7712,7714,7716,7718,7720,7722],{"class":3014,"line":4191},[3012,7707,4914],{"class":3984},[3012,7709,4336],{"class":3231},[3012,7711,3112],{"class":3613},[3012,7713,4929],{"class":3635},[3012,7715,3759],{"class":3231},[3012,7717,6923],{"class":3635},[3012,7719,3173],{"class":3231},[3012,7721,4938],{"class":3446},[3012,7723,3770],{"class":3231},[3012,7725,7726,7728,7730,7732,7734,7736,7738],{"class":3014,"line":4219},[3012,7727,7385],{"class":3613},[3012,7729,4949],{"class":3635},[3012,7731,3759],{"class":3231},[3012,7733,4954],{"class":3635},[3012,7735,3173],{"class":3231},[3012,7737,5919],{"class":3446},[3012,7739,6167],{"class":3231},[3012,7741,7742],{"class":3014,"line":4247},[3012,7743,3055],{"emptyLinePlaceholder":3054},[3012,7745,7746,7748,7750,7752,7754,7756],{"class":3014,"line":4274},[3012,7747,4966],{"class":3635},[3012,7749,3173],{"class":3231},[3012,7751,5930],{"class":3446},[3012,7753,3472],{"class":3231},[3012,7755,5935],{"class":3475},[3012,7757,7758],{"class":3231},", id);\n",[3012,7760,7761],{"class":3014,"line":4279},[3012,7762,3055],{"emptyLinePlaceholder":3054},[3012,7764,7765,7768,7770,7772,7774,7776,7778,7780,7782],{"class":3014,"line":4284},[3012,7766,7767],{"class":3984},"            try",[3012,7769,4336],{"class":3231},[3012,7771,3150],{"class":3613},[3012,7773,5161],{"class":3635},[3012,7775,3759],{"class":3231},[3012,7777,5166],{"class":3635},[3012,7779,3173],{"class":3231},[3012,7781,5171],{"class":3446},[3012,7783,5195],{"class":3231},[3012,7785,7786],{"class":3014,"line":4290},[3012,7787,7788],{"class":3206},"                // ResultSet відкривається всередині try-with-resources stmt,\n",[3012,7790,7791],{"class":3014,"line":4296},[3012,7792,7793],{"class":3206},"                // тому його закриваємо окремим вкладеним блоком\n",[3012,7795,7796,7799,7801,7803,7805,7807],{"class":3014,"line":4301},[3012,7797,7798],{"class":3984},"                if",[3012,7800,4336],{"class":3231},[3012,7802,5187],{"class":3635},[3012,7804,3173],{"class":3231},[3012,7806,5192],{"class":3446},[3012,7808,5195],{"class":3231},[3012,7810,7811,7814,7816,7818,7820,7822,7824],{"class":3014,"line":4310},[3012,7812,7813],{"class":3984},"                    return",[3012,7815,5068],{"class":3635},[3012,7817,3173],{"class":3231},[3012,7819,5227],{"class":3446},[3012,7821,3472],{"class":3231},[3012,7823,5207],{"class":3446},[3012,7825,5455],{"class":3231},[3012,7827,7828],{"class":3014,"line":4330},[3012,7829,7830],{"class":3231},"                }\n",[3012,7832,7833,7835,7837,7839,7841],{"class":3014,"line":4351},[3012,7834,5220],{"class":3984},[3012,7836,5068],{"class":3635},[3012,7838,3173],{"class":3231},[3012,7840,5291],{"class":3446},[3012,7842,3770],{"class":3231},[3012,7844,7845],{"class":3014,"line":4374},[3012,7846,5235],{"class":3231},[3012,7848,7849],{"class":3014,"line":4405},[3012,7850,3055],{"emptyLinePlaceholder":3054},[3012,7852,7853,7855,7857,7859,7861,7863],{"class":3014,"line":4410},[3012,7854,4984],{"class":3231},[3012,7856,4987],{"class":3984},[3012,7858,4336],{"class":3231},[3012,7860,4992],{"class":3613},[3012,7862,4995],{"class":3635},[3012,7864,3745],{"class":3231},[3012,7866,7867,7869,7871,7873,7875,7878],{"class":3014,"line":4415},[3012,7868,6562],{"class":3984},[3012,7870,5576],{"class":3984},[3012,7872,6567],{"class":3446},[3012,7874,3472],{"class":3231},[3012,7876,7877],{"class":3991},"\"Помилка пошуку автора за id=\"",[3012,7879,7880],{"class":3231}," + id, e);\n",[3012,7882,7883],{"class":3014,"line":4422},[3012,7884,5040],{"class":3231},[3012,7886,7887],{"class":3014,"line":4435},[3012,7888,3802],{"class":3231},[3012,7890,7891],{"class":3014,"line":4451},[3012,7892,3055],{"emptyLinePlaceholder":3054},[3012,7894,7895],{"class":3014,"line":4456},[3012,7896,3697],{"class":3206},[3012,7898,7899],{"class":3014,"line":4461},[3012,7900,7901],{"class":3206},"     * Повертає всіх авторів, відсортованих за прізвищем та ім'ям.\n",[3012,7903,7904],{"class":3014,"line":4468},[3012,7905,3721],{"class":3206},[3012,7907,7908,7910,7912,7914,7916,7918,7920],{"class":3014,"line":4480},[3012,7909,3727],{"class":3439},[3012,7911,5321],{"class":3613},[3012,7913,3194],{"class":3231},[3012,7915,3537],{"class":3613},[3012,7917,5075],{"class":3231},[3012,7919,5330],{"class":3446},[3012,7921,3978],{"class":3231},[3012,7923,7924,7926,7928,7930],{"class":3014,"line":4508},[3012,7925,4814],{"class":3613},[3012,7927,4817],{"class":3635},[3012,7929,3759],{"class":3231},[3012,7931,7343],{"class":3991},[3012,7933,7934],{"class":3014,"line":4513},[3012,7935,7687],{"class":3991},[3012,7937,7938],{"class":3014,"line":5522},[3012,7939,7692],{"class":3991},[3012,7941,7942],{"class":3014,"line":5527},[3012,7943,7944],{"class":3991},"            ORDER BY last_name, first_name\n",[3012,7946,7947,7949],{"class":3014,"line":5533},[3012,7948,7358],{"class":3991},[3012,7950,3639],{"class":3231},[3012,7952,7953,7955,7957,7959,7961,7963,7965,7967,7969],{"class":3014,"line":5539},[3012,7954,5350],{"class":3613},[3012,7956,3194],{"class":3231},[3012,7958,3537],{"class":3613},[3012,7960,5075],{"class":3231},[3012,7962,2991],{"class":3635},[3012,7964,3759],{"class":3231},[3012,7966,5363],{"class":3984},[3012,7968,5366],{"class":3613},[3012,7970,5369],{"class":3231},[3012,7972,7973],{"class":3014,"line":5544},[3012,7974,3055],{"emptyLinePlaceholder":3054},[3012,7976,7977,7979,7981,7983,7985,7987,7989,7991,7993],{"class":3014,"line":5571},[3012,7978,4914],{"class":3984},[3012,7980,4336],{"class":3231},[3012,7982,3112],{"class":3613},[3012,7984,4929],{"class":3635},[3012,7986,3759],{"class":3231},[3012,7988,6923],{"class":3635},[3012,7990,3173],{"class":3231},[3012,7992,4938],{"class":3446},[3012,7994,3770],{"class":3231},[3012,7996,7997,7999,8001,8003,8005,8007,8009],{"class":3014,"line":5584},[3012,7998,7385],{"class":3613},[3012,8000,4949],{"class":3635},[3012,8002,3759],{"class":3231},[3012,8004,4954],{"class":3635},[3012,8006,3173],{"class":3231},[3012,8008,5919],{"class":3446},[3012,8010,4974],{"class":3231},[3012,8012,8013,8016,8018,8020,8022,8024,8026],{"class":3014,"line":5615},[3012,8014,8015],{"class":3613},"             ResultSet",[3012,8017,5161],{"class":3635},[3012,8019,3759],{"class":3231},[3012,8021,5166],{"class":3635},[3012,8023,3173],{"class":3231},[3012,8025,5171],{"class":3446},[3012,8027,5195],{"class":3231},[3012,8029,8030],{"class":3014,"line":5633},[3012,8031,8032],{"class":3206},"            // ResultSet без параметрів можна відкрити одразу у try-with-resources\n",[3012,8034,8035],{"class":3014,"line":5649},[3012,8036,3055],{"emptyLinePlaceholder":3054},[3012,8038,8039,8041,8043,8045,8047,8049],{"class":3014,"line":5669},[3012,8040,5428],{"class":3984},[3012,8042,4336],{"class":3231},[3012,8044,5187],{"class":3635},[3012,8046,3173],{"class":3231},[3012,8048,5192],{"class":3446},[3012,8050,5195],{"class":3231},[3012,8052,8053,8055,8057,8059,8061,8063],{"class":3014,"line":5688},[3012,8054,5443],{"class":3635},[3012,8056,3173],{"class":3231},[3012,8058,5448],{"class":3446},[3012,8060,3472],{"class":3231},[3012,8062,5207],{"class":3446},[3012,8064,5455],{"class":3231},[3012,8066,8067],{"class":3014,"line":5694},[3012,8068,5235],{"class":3231},[3012,8070,8071],{"class":3014,"line":5699},[3012,8072,3055],{"emptyLinePlaceholder":3054},[3012,8074,8076,8078,8080,8082,8084,8086],{"class":3014,"line":8075},103,[3012,8077,4984],{"class":3231},[3012,8079,4987],{"class":3984},[3012,8081,4336],{"class":3231},[3012,8083,4992],{"class":3613},[3012,8085,4995],{"class":3635},[3012,8087,3745],{"class":3231},[3012,8089,8091,8093,8095,8097,8099,8102],{"class":3014,"line":8090},104,[3012,8092,6562],{"class":3984},[3012,8094,5576],{"class":3984},[3012,8096,6567],{"class":3446},[3012,8098,3472],{"class":3231},[3012,8100,8101],{"class":3991},"\"Помилка отримання списку авторів\"",[3012,8103,8104],{"class":3231},", e);\n",[3012,8106,8108],{"class":3014,"line":8107},105,[3012,8109,5040],{"class":3231},[3012,8111,8113,8115],{"class":3014,"line":8112},106,[3012,8114,3985],{"class":3984},[3012,8116,5511],{"class":3231},[3012,8118,8120],{"class":3014,"line":8119},107,[3012,8121,3802],{"class":3231},[3012,8123,8125],{"class":3014,"line":8124},108,[3012,8126,3055],{"emptyLinePlaceholder":3054},[3012,8128,8130],{"class":3014,"line":8129},109,[3012,8131,3697],{"class":3206},[3012,8133,8135],{"class":3014,"line":8134},110,[3012,8136,8137],{"class":3206},"     * Знаходить авторів за частиною прізвища (регістр-незалежний пошук).\n",[3012,8139,8141],{"class":3014,"line":8140},111,[3012,8142,3721],{"class":3206},[3012,8144,8146,8148,8150,8152,8154,8156,8159,8161,8163,8166],{"class":3014,"line":8145},112,[3012,8147,3727],{"class":3439},[3012,8149,5321],{"class":3613},[3012,8151,3194],{"class":3231},[3012,8153,3537],{"class":3613},[3012,8155,5075],{"class":3231},[3012,8157,8158],{"class":3446},"findByLastName",[3012,8160,3472],{"class":3231},[3012,8162,3734],{"class":3613},[3012,8164,8165],{"class":3635}," lastNamePart",[3012,8167,3745],{"class":3231},[3012,8169,8171,8173,8175,8177],{"class":3014,"line":8170},113,[3012,8172,4814],{"class":3613},[3012,8174,4817],{"class":3635},[3012,8176,3759],{"class":3231},[3012,8178,7343],{"class":3991},[3012,8180,8182],{"class":3014,"line":8181},114,[3012,8183,7687],{"class":3991},[3012,8185,8187],{"class":3014,"line":8186},115,[3012,8188,7692],{"class":3991},[3012,8190,8192],{"class":3014,"line":8191},116,[3012,8193,8194],{"class":3991},"            WHERE LOWER(last_name) LIKE LOWER(?)\n",[3012,8196,8198],{"class":3014,"line":8197},117,[3012,8199,7944],{"class":3991},[3012,8201,8203,8205],{"class":3014,"line":8202},118,[3012,8204,7358],{"class":3991},[3012,8206,3639],{"class":3231},[3012,8208,8210,8212,8214,8216,8218,8220,8222,8224,8226],{"class":3014,"line":8209},119,[3012,8211,5350],{"class":3613},[3012,8213,3194],{"class":3231},[3012,8215,3537],{"class":3613},[3012,8217,5075],{"class":3231},[3012,8219,2991],{"class":3635},[3012,8221,3759],{"class":3231},[3012,8223,5363],{"class":3984},[3012,8225,5366],{"class":3613},[3012,8227,5369],{"class":3231},[3012,8229,8231],{"class":3014,"line":8230},120,[3012,8232,3055],{"emptyLinePlaceholder":3054},[3012,8234,8236,8238,8240,8242,8244,8246,8248,8250,8252],{"class":3014,"line":8235},121,[3012,8237,4914],{"class":3984},[3012,8239,4336],{"class":3231},[3012,8241,3112],{"class":3613},[3012,8243,4929],{"class":3635},[3012,8245,3759],{"class":3231},[3012,8247,6923],{"class":3635},[3012,8249,3173],{"class":3231},[3012,8251,4938],{"class":3446},[3012,8253,3770],{"class":3231},[3012,8255,8257,8259,8261,8263,8265,8267,8269],{"class":3014,"line":8256},122,[3012,8258,7385],{"class":3613},[3012,8260,4949],{"class":3635},[3012,8262,3759],{"class":3231},[3012,8264,4954],{"class":3635},[3012,8266,3173],{"class":3231},[3012,8268,5919],{"class":3446},[3012,8270,6167],{"class":3231},[3012,8272,8274],{"class":3014,"line":8273},123,[3012,8275,3055],{"emptyLinePlaceholder":3054},[3012,8277,8279],{"class":3014,"line":8278},124,[3012,8280,8281],{"class":3206},"            // % — SQL-шаблон \"будь-яка кількість символів\"\n",[3012,8283,8285,8287,8289,8291,8293,8295,8297,8300,8303,8305],{"class":3014,"line":8284},125,[3012,8286,4966],{"class":3635},[3012,8288,3173],{"class":3231},[3012,8290,5958],{"class":3446},[3012,8292,3472],{"class":3231},[3012,8294,5935],{"class":3475},[3012,8296,3098],{"class":3231},[3012,8298,8299],{"class":3991},"\"%\"",[3012,8301,8302],{"class":3231}," + lastNamePart + ",[3012,8304,8299],{"class":3991},[3012,8306,3531],{"class":3231},[3012,8308,8310],{"class":3014,"line":8309},126,[3012,8311,3055],{"emptyLinePlaceholder":3054},[3012,8313,8315,8317,8319,8321,8323,8325,8327,8329,8331],{"class":3014,"line":8314},127,[3012,8316,7767],{"class":3984},[3012,8318,4336],{"class":3231},[3012,8320,3150],{"class":3613},[3012,8322,5161],{"class":3635},[3012,8324,3759],{"class":3231},[3012,8326,5166],{"class":3635},[3012,8328,3173],{"class":3231},[3012,8330,5171],{"class":3446},[3012,8332,5195],{"class":3231},[3012,8334,8336,8339,8341,8343,8345,8347],{"class":3014,"line":8335},128,[3012,8337,8338],{"class":3984},"                while",[3012,8340,4336],{"class":3231},[3012,8342,5187],{"class":3635},[3012,8344,3173],{"class":3231},[3012,8346,5192],{"class":3446},[3012,8348,5195],{"class":3231},[3012,8350,8352,8355,8357,8359,8361,8363],{"class":3014,"line":8351},129,[3012,8353,8354],{"class":3635},"                    authors",[3012,8356,3173],{"class":3231},[3012,8358,5448],{"class":3446},[3012,8360,3472],{"class":3231},[3012,8362,5207],{"class":3446},[3012,8364,5455],{"class":3231},[3012,8366,8368],{"class":3014,"line":8367},130,[3012,8369,7830],{"class":3231},[3012,8371,8373],{"class":3014,"line":8372},131,[3012,8374,5235],{"class":3231},[3012,8376,8378],{"class":3014,"line":8377},132,[3012,8379,3055],{"emptyLinePlaceholder":3054},[3012,8381,8383,8385,8387,8389,8391,8393],{"class":3014,"line":8382},133,[3012,8384,4984],{"class":3231},[3012,8386,4987],{"class":3984},[3012,8388,4336],{"class":3231},[3012,8390,4992],{"class":3613},[3012,8392,4995],{"class":3635},[3012,8394,3745],{"class":3231},[3012,8396,8398,8400,8402,8404,8406,8409],{"class":3014,"line":8397},134,[3012,8399,6562],{"class":3984},[3012,8401,5576],{"class":3984},[3012,8403,6567],{"class":3446},[3012,8405,3472],{"class":3231},[3012,8407,8408],{"class":3991},"\"Помилка пошуку авторів за прізвищем: \"",[3012,8410,8411],{"class":3231}," + lastNamePart, e);\n",[3012,8413,8415],{"class":3014,"line":8414},135,[3012,8416,5040],{"class":3231},[3012,8418,8420,8422],{"class":3014,"line":8419},136,[3012,8421,3985],{"class":3984},[3012,8423,5511],{"class":3231},[3012,8425,8427],{"class":3014,"line":8426},137,[3012,8428,3802],{"class":3231},[3012,8430,8432],{"class":3014,"line":8431},138,[3012,8433,3055],{"emptyLinePlaceholder":3054},[3012,8435,8437],{"class":3014,"line":8436},139,[3012,8438,3697],{"class":3206},[3012,8440,8442],{"class":3014,"line":8441},140,[3012,8443,8444],{"class":3206},"     * Оновлює дані існуючого автора.\n",[3012,8446,8448],{"class":3014,"line":8447},141,[3012,8449,8450],{"class":3206},"     * Оновлює всі поля, крім незмінного id.\n",[3012,8452,8454],{"class":3014,"line":8453},142,[3012,8455,3721],{"class":3206},[3012,8457,8459,8461,8463,8466,8468,8470,8472],{"class":3014,"line":8458},143,[3012,8460,3727],{"class":3439},[3012,8462,4166],{"class":3613},[3012,8464,8465],{"class":3446}," update",[3012,8467,3472],{"class":3231},[3012,8469,3537],{"class":3613},[3012,8471,4802],{"class":3635},[3012,8473,3745],{"class":3231},[3012,8475,8477,8479,8481,8483],{"class":3014,"line":8476},144,[3012,8478,4814],{"class":3613},[3012,8480,4817],{"class":3635},[3012,8482,3759],{"class":3231},[3012,8484,7343],{"class":3991},[3012,8486,8488],{"class":3014,"line":8487},145,[3012,8489,8490],{"class":3991},"            UPDATE authors\n",[3012,8492,8494],{"class":3014,"line":8493},146,[3012,8495,8496],{"class":3991},"            SET first_name = ?,\n",[3012,8498,8500],{"class":3014,"line":8499},147,[3012,8501,8502],{"class":3991},"                last_name  = ?,\n",[3012,8504,8506],{"class":3014,"line":8505},148,[3012,8507,8508],{"class":3991},"                bio        = ?,\n",[3012,8510,8512],{"class":3014,"line":8511},149,[3012,8513,8514],{"class":3991},"                image_path = ?\n",[3012,8516,8518],{"class":3014,"line":8517},150,[3012,8519,7697],{"class":3991},[3012,8521,8523,8525],{"class":3014,"line":8522},151,[3012,8524,7358],{"class":3991},[3012,8526,3639],{"class":3231},[3012,8528,8530,8532,8534,8536,8538,8540,8542,8544,8546],{"class":3014,"line":8529},152,[3012,8531,4914],{"class":3984},[3012,8533,4336],{"class":3231},[3012,8535,3112],{"class":3613},[3012,8537,4929],{"class":3635},[3012,8539,3759],{"class":3231},[3012,8541,6923],{"class":3635},[3012,8543,3173],{"class":3231},[3012,8545,4938],{"class":3446},[3012,8547,3770],{"class":3231},[3012,8549,8551,8553,8555,8557,8559,8561,8563],{"class":3014,"line":8550},153,[3012,8552,7385],{"class":3613},[3012,8554,4949],{"class":3635},[3012,8556,3759],{"class":3231},[3012,8558,4954],{"class":3635},[3012,8560,3173],{"class":3231},[3012,8562,5919],{"class":3446},[3012,8564,6167],{"class":3231},[3012,8566,8568],{"class":3014,"line":8567},154,[3012,8569,3055],{"emptyLinePlaceholder":3054},[3012,8571,8573,8575,8577,8579,8581,8583,8585,8587,8589,8591],{"class":3014,"line":8572},155,[3012,8574,4966],{"class":3635},[3012,8576,3173],{"class":3231},[3012,8578,5958],{"class":3446},[3012,8580,3472],{"class":3231},[3012,8582,5935],{"class":3475},[3012,8584,3098],{"class":3231},[3012,8586,4835],{"class":3635},[3012,8588,3173],{"class":3231},[3012,8590,4857],{"class":3446},[3012,8592,5035],{"class":3231},[3012,8594,8596,8598,8600,8602,8604,8606,8608,8610,8612,8614],{"class":3014,"line":8595},156,[3012,8597,4966],{"class":3635},[3012,8599,3173],{"class":3231},[3012,8601,5958],{"class":3446},[3012,8603,3472],{"class":3231},[3012,8605,5963],{"class":3475},[3012,8607,3098],{"class":3231},[3012,8609,4835],{"class":3635},[3012,8611,3173],{"class":3231},[3012,8613,4872],{"class":3446},[3012,8615,5035],{"class":3231},[3012,8617,8619,8621,8623,8625,8627,8629,8631,8633,8635,8637],{"class":3014,"line":8618},157,[3012,8620,4966],{"class":3635},[3012,8622,3173],{"class":3231},[3012,8624,5958],{"class":3446},[3012,8626,3472],{"class":3231},[3012,8628,5990],{"class":3475},[3012,8630,3098],{"class":3231},[3012,8632,4835],{"class":3635},[3012,8634,3173],{"class":3231},[3012,8636,4887],{"class":3446},[3012,8638,5035],{"class":3231},[3012,8640,8642,8644,8646,8648,8650,8652,8654,8656,8658,8660],{"class":3014,"line":8641},158,[3012,8643,4966],{"class":3635},[3012,8645,3173],{"class":3231},[3012,8647,5958],{"class":3446},[3012,8649,3472],{"class":3231},[3012,8651,6013],{"class":3475},[3012,8653,3098],{"class":3231},[3012,8655,4835],{"class":3635},[3012,8657,3173],{"class":3231},[3012,8659,4902],{"class":3446},[3012,8661,5035],{"class":3231},[3012,8663,8665,8667,8669,8671,8673,8675,8677,8679,8681,8683,8685],{"class":3014,"line":8664},159,[3012,8666,4966],{"class":3635},[3012,8668,3173],{"class":3231},[3012,8670,5930],{"class":3446},[3012,8672,3472],{"class":3231},[3012,8674,6040],{"class":3475},[3012,8676,3098],{"class":3231},[3012,8678,4835],{"class":3635},[3012,8680,3173],{"class":3231},[3012,8682,4840],{"class":3446},[3012,8684,5974],{"class":3231},[3012,8686,8687],{"class":3206},"// id — в умові WHERE, останній параметр\n",[3012,8689,8691],{"class":3014,"line":8690},160,[3012,8692,3055],{"emptyLinePlaceholder":3054},[3012,8694,8696,8698,8700,8702,8704,8706,8708],{"class":3014,"line":8695},161,[3012,8697,7530],{"class":3613},[3012,8699,7533],{"class":3635},[3012,8701,3759],{"class":3231},[3012,8703,5166],{"class":3635},[3012,8705,3173],{"class":3231},[3012,8707,4971],{"class":3446},[3012,8709,3770],{"class":3231},[3012,8711,8713,8715,8718,8721],{"class":3014,"line":8712},162,[3012,8714,5182],{"class":3984},[3012,8716,8717],{"class":3231}," (rowsAffected == ",[3012,8719,8720],{"class":3475},"0",[3012,8722,3745],{"class":3231},[3012,8724,8726],{"class":3014,"line":8725},163,[3012,8727,8728],{"class":3206},"                // Автор з таким id не існує — це логічна помилка клієнтського коду\n",[3012,8730,8732,8734,8736,8738],{"class":3014,"line":8731},164,[3012,8733,7559],{"class":3984},[3012,8735,5576],{"class":3984},[3012,8737,6567],{"class":3446},[3012,8739,5581],{"class":3231},[3012,8741,8743,8746,8748,8750,8752,8754,8756,8759,8761],{"class":3014,"line":8742},165,[3012,8744,8745],{"class":3991},"                    \"Автора з id=\"",[3012,8747,4494],{"class":3231},[3012,8749,4835],{"class":3635},[3012,8751,3173],{"class":3231},[3012,8753,4840],{"class":3446},[3012,8755,4500],{"class":3231},[3012,8757,8758],{"class":3991},"\" не знайдено для оновлення\"",[3012,8760,3098],{"class":3231},[3012,8762,8763],{"class":3439},"null\n",[3012,8765,8767],{"class":3014,"line":8766},166,[3012,8768,8769],{"class":3231},"                );\n",[3012,8771,8773],{"class":3014,"line":8772},167,[3012,8774,5235],{"class":3231},[3012,8776,8778],{"class":3014,"line":8777},168,[3012,8779,3055],{"emptyLinePlaceholder":3054},[3012,8781,8783,8785,8787,8789,8791,8793],{"class":3014,"line":8782},169,[3012,8784,4984],{"class":3231},[3012,8786,4987],{"class":3984},[3012,8788,4336],{"class":3231},[3012,8790,4992],{"class":3613},[3012,8792,4995],{"class":3635},[3012,8794,3745],{"class":3231},[3012,8796,8798,8800,8802,8804,8806,8809,8811,8813,8815,8817],{"class":3014,"line":8797},170,[3012,8799,6562],{"class":3984},[3012,8801,5576],{"class":3984},[3012,8803,6567],{"class":3446},[3012,8805,3472],{"class":3231},[3012,8807,8808],{"class":3991},"\"Помилка оновлення автора: \"",[3012,8810,4494],{"class":3231},[3012,8812,4835],{"class":3635},[3012,8814,3173],{"class":3231},[3012,8816,4840],{"class":3446},[3012,8818,7620],{"class":3231},[3012,8820,8822],{"class":3014,"line":8821},171,[3012,8823,5040],{"class":3231},[3012,8825,8827],{"class":3014,"line":8826},172,[3012,8828,3802],{"class":3231},[3012,8830,8832],{"class":3014,"line":8831},173,[3012,8833,3055],{"emptyLinePlaceholder":3054},[3012,8835,8837],{"class":3014,"line":8836},174,[3012,8838,3697],{"class":3206},[3012,8840,8842],{"class":3014,"line":8841},175,[3012,8843,8844],{"class":3206},"     * Видаляє автора за ідентифікатором.\n",[3012,8846,8848],{"class":3014,"line":8847},176,[3012,8849,8850],{"class":3206},"     * Завдяки ON DELETE CASCADE у схемі, всі пов'язані audiobooks\n",[3012,8852,8854],{"class":3014,"line":8853},177,[3012,8855,8856],{"class":3206},"     * також будуть видалені автоматично.\n",[3012,8858,8860],{"class":3014,"line":8859},178,[3012,8861,8862],{"class":3206},"     *\n",[3012,8864,8866,8869,8872],{"class":3014,"line":8865},179,[3012,8867,8868],{"class":3206},"     * ",[3012,8870,8871],{"class":3439},"@return",[3012,8873,8874],{"class":3206}," true — якщо автора було знайдено та видалено\n",[3012,8876,8878],{"class":3014,"line":8877},180,[3012,8879,3721],{"class":3206},[3012,8881,8883,8885,8887,8890,8892,8894,8896],{"class":3014,"line":8882},181,[3012,8884,3727],{"class":3439},[3012,8886,4019],{"class":3613},[3012,8888,8889],{"class":3446}," deleteById",[3012,8891,3472],{"class":3231},[3012,8893,3762],{"class":3613},[3012,8895,3636],{"class":3635},[3012,8897,3745],{"class":3231},[3012,8899,8901,8903,8905,8907,8910],{"class":3014,"line":8900},182,[3012,8902,4814],{"class":3613},[3012,8904,4817],{"class":3635},[3012,8906,3759],{"class":3231},[3012,8908,8909],{"class":3991},"\"DELETE FROM authors WHERE id = ?\"",[3012,8911,3639],{"class":3231},[3012,8913,8915],{"class":3014,"line":8914},183,[3012,8916,3055],{"emptyLinePlaceholder":3054},[3012,8918,8920,8922,8924,8926,8928,8930,8932,8934,8936],{"class":3014,"line":8919},184,[3012,8921,4914],{"class":3984},[3012,8923,4336],{"class":3231},[3012,8925,3112],{"class":3613},[3012,8927,4929],{"class":3635},[3012,8929,3759],{"class":3231},[3012,8931,6923],{"class":3635},[3012,8933,3173],{"class":3231},[3012,8935,4938],{"class":3446},[3012,8937,3770],{"class":3231},[3012,8939,8941,8943,8945,8947,8949,8951,8953],{"class":3014,"line":8940},185,[3012,8942,7385],{"class":3613},[3012,8944,4949],{"class":3635},[3012,8946,3759],{"class":3231},[3012,8948,4954],{"class":3635},[3012,8950,3173],{"class":3231},[3012,8952,5919],{"class":3446},[3012,8954,6167],{"class":3231},[3012,8956,8958],{"class":3014,"line":8957},186,[3012,8959,3055],{"emptyLinePlaceholder":3054},[3012,8961,8963,8965,8967,8969,8971,8973],{"class":3014,"line":8962},187,[3012,8964,4966],{"class":3635},[3012,8966,3173],{"class":3231},[3012,8968,5930],{"class":3446},[3012,8970,3472],{"class":3231},[3012,8972,5935],{"class":3475},[3012,8974,7758],{"class":3231},[3012,8976,8978,8980,8982,8984,8986,8988,8990],{"class":3014,"line":8977},188,[3012,8979,7530],{"class":3613},[3012,8981,7533],{"class":3635},[3012,8983,3759],{"class":3231},[3012,8985,5166],{"class":3635},[3012,8987,3173],{"class":3231},[3012,8989,4971],{"class":3446},[3012,8991,3770],{"class":3231},[3012,8993,8995,8997,9000,9002,9004],{"class":3014,"line":8994},189,[3012,8996,6533],{"class":3984},[3012,8998,8999],{"class":3231}," rowsAffected > ",[3012,9001,8720],{"class":3475},[3012,9003,5112],{"class":3231},[3012,9005,9006],{"class":3206},"// false якщо автора з таким id не існувало\n",[3012,9008,9010],{"class":3014,"line":9009},190,[3012,9011,3055],{"emptyLinePlaceholder":3054},[3012,9013,9015,9017,9019,9021,9023,9025],{"class":3014,"line":9014},191,[3012,9016,4984],{"class":3231},[3012,9018,4987],{"class":3984},[3012,9020,4336],{"class":3231},[3012,9022,4992],{"class":3613},[3012,9024,4995],{"class":3635},[3012,9026,3745],{"class":3231},[3012,9028,9030,9032,9034,9036,9038,9041],{"class":3014,"line":9029},192,[3012,9031,6562],{"class":3984},[3012,9033,5576],{"class":3984},[3012,9035,6567],{"class":3446},[3012,9037,3472],{"class":3231},[3012,9039,9040],{"class":3991},"\"Помилка видалення автора з id=\"",[3012,9042,7880],{"class":3231},[3012,9044,9046],{"class":3014,"line":9045},193,[3012,9047,5040],{"class":3231},[3012,9049,9051],{"class":3014,"line":9050},194,[3012,9052,3802],{"class":3231},[3012,9054,9056],{"class":3014,"line":9055},195,[3012,9057,3055],{"emptyLinePlaceholder":3054},[3012,9059,9061],{"class":3014,"line":9060},196,[3012,9062,3697],{"class":3206},[3012,9064,9066],{"class":3014,"line":9065},197,[3012,9067,9068],{"class":3206},"     * Перевіряє існування автора за id без завантаження всіх даних.\n",[3012,9070,9072],{"class":3014,"line":9071},198,[3012,9073,9074],{"class":3206},"     * Ефективніше за findById() + isPresent() — не передає дані по мережі.\n",[3012,9076,9078],{"class":3014,"line":9077},199,[3012,9079,3721],{"class":3206},[3012,9081,9083,9085,9087,9090,9092,9094,9096],{"class":3014,"line":9082},200,[3012,9084,3727],{"class":3439},[3012,9086,4019],{"class":3613},[3012,9088,9089],{"class":3446}," existsById",[3012,9091,3472],{"class":3231},[3012,9093,3762],{"class":3613},[3012,9095,3636],{"class":3635},[3012,9097,3745],{"class":3231},[3012,9099,9101,9103,9105,9107,9110],{"class":3014,"line":9100},201,[3012,9102,4814],{"class":3613},[3012,9104,4817],{"class":3635},[3012,9106,3759],{"class":3231},[3012,9108,9109],{"class":3991},"\"SELECT 1 FROM authors WHERE id = ? LIMIT 1\"",[3012,9111,3639],{"class":3231},[3012,9113,9115],{"class":3014,"line":9114},202,[3012,9116,3055],{"emptyLinePlaceholder":3054},[3012,9118,9120,9122,9124,9126,9128,9130,9132,9134,9136],{"class":3014,"line":9119},203,[3012,9121,4914],{"class":3984},[3012,9123,4336],{"class":3231},[3012,9125,3112],{"class":3613},[3012,9127,4929],{"class":3635},[3012,9129,3759],{"class":3231},[3012,9131,6923],{"class":3635},[3012,9133,3173],{"class":3231},[3012,9135,4938],{"class":3446},[3012,9137,3770],{"class":3231},[3012,9139,9141,9143,9145,9147,9149,9151,9153],{"class":3014,"line":9140},204,[3012,9142,7385],{"class":3613},[3012,9144,4949],{"class":3635},[3012,9146,3759],{"class":3231},[3012,9148,4954],{"class":3635},[3012,9150,3173],{"class":3231},[3012,9152,5919],{"class":3446},[3012,9154,6167],{"class":3231},[3012,9156,9158],{"class":3014,"line":9157},205,[3012,9159,3055],{"emptyLinePlaceholder":3054},[3012,9161,9163,9165,9167,9169,9171,9173],{"class":3014,"line":9162},206,[3012,9164,4966],{"class":3635},[3012,9166,3173],{"class":3231},[3012,9168,5930],{"class":3446},[3012,9170,3472],{"class":3231},[3012,9172,5935],{"class":3475},[3012,9174,7758],{"class":3231},[3012,9176,9178,9180,9182,9184,9186,9188,9190,9192,9194],{"class":3014,"line":9177},207,[3012,9179,7767],{"class":3984},[3012,9181,4336],{"class":3231},[3012,9183,3150],{"class":3613},[3012,9185,5161],{"class":3635},[3012,9187,3759],{"class":3231},[3012,9189,5166],{"class":3635},[3012,9191,3173],{"class":3231},[3012,9193,5171],{"class":3446},[3012,9195,5195],{"class":3231},[3012,9197,9199,9201,9203,9205,9207,9210],{"class":3014,"line":9198},208,[3012,9200,5220],{"class":3984},[3012,9202,5161],{"class":3635},[3012,9204,3173],{"class":3231},[3012,9206,5192],{"class":3446},[3012,9208,9209],{"class":3231},"(); ",[3012,9211,9212],{"class":3206},"// true — якщо хоча б один рядок є\n",[3012,9214,9216],{"class":3014,"line":9215},209,[3012,9217,5235],{"class":3231},[3012,9219,9221],{"class":3014,"line":9220},210,[3012,9222,3055],{"emptyLinePlaceholder":3054},[3012,9224,9226,9228,9230,9232,9234,9236],{"class":3014,"line":9225},211,[3012,9227,4984],{"class":3231},[3012,9229,4987],{"class":3984},[3012,9231,4336],{"class":3231},[3012,9233,4992],{"class":3613},[3012,9235,4995],{"class":3635},[3012,9237,3745],{"class":3231},[3012,9239,9241,9243,9245,9247,9249,9252],{"class":3014,"line":9240},212,[3012,9242,6562],{"class":3984},[3012,9244,5576],{"class":3984},[3012,9246,6567],{"class":3446},[3012,9248,3472],{"class":3231},[3012,9250,9251],{"class":3991},"\"Помилка перевірки існування автора: \"",[3012,9253,7880],{"class":3231},[3012,9255,9257],{"class":3014,"line":9256},213,[3012,9258,5040],{"class":3231},[3012,9260,9262],{"class":3014,"line":9261},214,[3012,9263,3802],{"class":3231},[3012,9265,9267],{"class":3014,"line":9266},215,[3012,9268,3055],{"emptyLinePlaceholder":3054},[3012,9270,9272],{"class":3014,"line":9271},216,[3012,9273,3697],{"class":3206},[3012,9275,9277],{"class":3014,"line":9276},217,[3012,9278,9279],{"class":3206},"     * Повертає кількість авторів у таблиці.\n",[3012,9281,9283],{"class":3014,"line":9282},218,[3012,9284,9285],{"class":3206},"     * Використовує COUNT(*) — найефективніший спосіб підрахунку рядків.\n",[3012,9287,9289],{"class":3014,"line":9288},219,[3012,9290,3721],{"class":3206},[3012,9292,9294,9296,9299,9302],{"class":3014,"line":9293},220,[3012,9295,3727],{"class":3439},[3012,9297,9298],{"class":3613}," long",[3012,9300,9301],{"class":3446}," count",[3012,9303,3978],{"class":3231},[3012,9305,9307,9309,9311,9313,9316],{"class":3014,"line":9306},221,[3012,9308,4814],{"class":3613},[3012,9310,4817],{"class":3635},[3012,9312,3759],{"class":3231},[3012,9314,9315],{"class":3991},"\"SELECT COUNT(*) FROM authors\"",[3012,9317,3639],{"class":3231},[3012,9319,9321],{"class":3014,"line":9320},222,[3012,9322,3055],{"emptyLinePlaceholder":3054},[3012,9324,9326,9328,9330,9332,9334,9336,9338,9340,9342],{"class":3014,"line":9325},223,[3012,9327,4914],{"class":3984},[3012,9329,4336],{"class":3231},[3012,9331,3112],{"class":3613},[3012,9333,4929],{"class":3635},[3012,9335,3759],{"class":3231},[3012,9337,6923],{"class":3635},[3012,9339,3173],{"class":3231},[3012,9341,4938],{"class":3446},[3012,9343,3770],{"class":3231},[3012,9345,9347,9349,9351,9353,9355,9357,9359],{"class":3014,"line":9346},224,[3012,9348,7385],{"class":3613},[3012,9350,4949],{"class":3635},[3012,9352,3759],{"class":3231},[3012,9354,4954],{"class":3635},[3012,9356,3173],{"class":3231},[3012,9358,5919],{"class":3446},[3012,9360,4974],{"class":3231},[3012,9362,9364,9366,9368,9370,9372,9374,9376],{"class":3014,"line":9363},225,[3012,9365,8015],{"class":3613},[3012,9367,5161],{"class":3635},[3012,9369,3759],{"class":3231},[3012,9371,5166],{"class":3635},[3012,9373,3173],{"class":3231},[3012,9375,5171],{"class":3446},[3012,9377,5195],{"class":3231},[3012,9379,9381],{"class":3014,"line":9380},226,[3012,9382,3055],{"emptyLinePlaceholder":3054},[3012,9384,9386,9388,9390,9392],{"class":3014,"line":9385},227,[3012,9387,5587],{"class":3635},[3012,9389,3173],{"class":3231},[3012,9391,5192],{"class":3446},[3012,9393,3770],{"class":3231},[3012,9395,9397,9399,9401,9403,9406,9408,9410,9412],{"class":3014,"line":9396},228,[3012,9398,6533],{"class":3984},[3012,9400,5161],{"class":3635},[3012,9402,3173],{"class":3231},[3012,9404,9405],{"class":3446},"getLong",[3012,9407,3472],{"class":3231},[3012,9409,5935],{"class":3475},[3012,9411,5830],{"class":3231},[3012,9413,9414],{"class":3206},"// Перший (і єдиний) стовпець результату\n",[3012,9416,9418],{"class":3014,"line":9417},229,[3012,9419,3055],{"emptyLinePlaceholder":3054},[3012,9421,9423,9425,9427,9429,9431,9433],{"class":3014,"line":9422},230,[3012,9424,4984],{"class":3231},[3012,9426,4987],{"class":3984},[3012,9428,4336],{"class":3231},[3012,9430,4992],{"class":3613},[3012,9432,4995],{"class":3635},[3012,9434,3745],{"class":3231},[3012,9436,9438,9440,9442,9444,9446,9449],{"class":3014,"line":9437},231,[3012,9439,6562],{"class":3984},[3012,9441,5576],{"class":3984},[3012,9443,6567],{"class":3446},[3012,9445,3472],{"class":3231},[3012,9447,9448],{"class":3991},"\"Помилка підрахунку авторів\"",[3012,9450,8104],{"class":3231},[3012,9452,9454],{"class":3014,"line":9453},232,[3012,9455,5040],{"class":3231},[3012,9457,9459],{"class":3014,"line":9458},233,[3012,9460,3802],{"class":3231},[3012,9462,9464],{"class":3014,"line":9463},234,[3012,9465,3055],{"emptyLinePlaceholder":3054},[3012,9467,9469],{"class":3014,"line":9468},235,[3012,9470,3697],{"class":3206},[3012,9472,9474],{"class":3014,"line":9473},236,[3012,9475,9476],{"class":3206},"     * Приватний метод маппінгу ResultSet → Author.\n",[3012,9478,9480],{"class":3014,"line":9479},237,[3012,9481,9482],{"class":3206},"     * Централізований у одному місці — зміна структури таблиці\n",[3012,9484,9486],{"class":3014,"line":9485},238,[3012,9487,9488],{"class":3206},"     * вимагає зміни лише тут.\n",[3012,9490,9492],{"class":3014,"line":9491},239,[3012,9493,3721],{"class":3206},[3012,9495,9497,9499,9501,9503,9505,9507,9509,9511,9513,9515],{"class":3014,"line":9496},240,[3012,9498,3626],{"class":3439},[3012,9500,3614],{"class":3613},[3012,9502,5551],{"class":3446},[3012,9504,3472],{"class":3231},[3012,9506,3150],{"class":3613},[3012,9508,5161],{"class":3635},[3012,9510,5560],{"class":3231},[3012,9512,5563],{"class":3439},[3012,9514,5566],{"class":3613},[3012,9516,3617],{"class":3231},[3012,9518,9520,9522,9524,9526],{"class":3014,"line":9519},241,[3012,9521,3985],{"class":3984},[3012,9523,5576],{"class":3984},[3012,9525,3614],{"class":3446},[3012,9527,5581],{"class":3231},[3012,9529,9531,9533,9535,9537,9539,9541,9543,9545,9547,9549,9552],{"class":3014,"line":9530},242,[3012,9532,5587],{"class":3635},[3012,9534,3173],{"class":3231},[3012,9536,5592],{"class":3446},[3012,9538,3472],{"class":3231},[3012,9540,5597],{"class":3991},[3012,9542,3098],{"class":3231},[3012,9544,3762],{"class":3635},[3012,9546,3173],{"class":3231},[3012,9548,5606],{"class":3635},[3012,9550,9551],{"class":3231},"),  ",[3012,9553,9554],{"class":3206},"// Типізований getObject для UUID\n",[3012,9556,9558,9560,9562,9564,9566,9568],{"class":3014,"line":9557},243,[3012,9559,5587],{"class":3635},[3012,9561,3173],{"class":3231},[3012,9563,5622],{"class":3446},[3012,9565,3472],{"class":3231},[3012,9567,5627],{"class":3991},[3012,9569,5630],{"class":3231},[3012,9571,9573,9575,9577,9579,9581,9583],{"class":3014,"line":9572},244,[3012,9574,5587],{"class":3635},[3012,9576,3173],{"class":3231},[3012,9578,5622],{"class":3446},[3012,9580,3472],{"class":3231},[3012,9582,5644],{"class":3991},[3012,9584,5630],{"class":3231},[3012,9586,9588,9590,9592,9594,9596,9598,9601],{"class":3014,"line":9587},245,[3012,9589,5587],{"class":3635},[3012,9591,3173],{"class":3231},[3012,9593,5622],{"class":3446},[3012,9595,3472],{"class":3231},[3012,9597,5660],{"class":3991},[3012,9599,9600],{"class":3231},"),             ",[3012,9602,9603],{"class":3206},"// Повертає null якщо стовпець NULL\n",[3012,9605,9607,9609,9611,9613,9615,9617,9620],{"class":3014,"line":9606},246,[3012,9608,5587],{"class":3635},[3012,9610,3173],{"class":3231},[3012,9612,5622],{"class":3446},[3012,9614,3472],{"class":3231},[3012,9616,5680],{"class":3991},[3012,9618,9619],{"class":3231},")       ",[3012,9621,9603],{"class":3206},[3012,9623,9625],{"class":3014,"line":9624},247,[3012,9626,5691],{"class":3231},[3012,9628,9630],{"class":3014,"line":9629},248,[3012,9631,3802],{"class":3231},[3012,9633,9635],{"class":3014,"line":9634},249,[3012,9636,4516],{"class":3231},[2964,9638,9639],{},[2971,9640,9641],{},"Декомпозиція ключових рішень:",[4523,9643,9644,9660,9666,9676,9690,9705,9714],{},[4526,9645,9646,4531,9649,9651,9652,9655,9656,9659],{},[2971,9647,9648],{},"Рядок 18",[2989,9650,6294],{}," передається через ",[2971,9653,9654],{},"конструктор"," (Dependency Injection) — ",[2989,9657,9658],{},"AuthorDao"," не знає, як саме отримати з'єднання; це визначає зовнішній код",[4526,9661,9662,9665],{},[2971,9663,9664],{},"Рядки 31–32",": Text Block (Java 15+) для SQL — читабельний, без конкатенацій",[4526,9667,9668,9671,9672,9675],{},[2971,9669,9670],{},"Рядок 43",": Перевірка ",[2989,9673,9674],{},"rowsAffected != 1"," — захист від тихих збоїв при INSERT",[4526,9677,9678,9681,9682,9684,9685,9687,9688],{},[2971,9679,9680],{},"Рядок 67",": Вкладений ",[2989,9683,6112],{}," для ",[2989,9686,3150],{}," — він має бути закритий до ",[2989,9689,3134],{},[4526,9691,9692,4531,9695,9698,9699,9701,9702,9704],{},[2971,9693,9694],{},"Рядок 91",[2989,9696,9697],{},"findAll()"," відкриває ",[2989,9700,3150],{}," одразу в ",[2989,9703,6112],{},", оскільки запит без параметрів",[4526,9706,9707,4531,9710,9713],{},[2971,9708,9709],{},"Рядок 140",[2989,9711,9712],{},"\"SELECT 1 FROM authors WHERE id = ?\""," — найефективніша перевірка існування: не передає дані, лише факт наявності рядка",[4526,9715,9716,4531,9719,9722,9723,9726],{},[2971,9717,9718],{},"Рядок 154",[2989,9720,9721],{},"rs.getLong(1)"," — звернення за номером стовпця (1-базований), а не за іменем; для ",[2989,9724,9725],{},"COUNT(*)"," це прийнятно",[3416,9728],{},[2959,9730,9732],{"id":9731},"демонстрація-зведення-всього-разом","Демонстрація: зведення всього разом",[2964,9734,9735,9736,9739,9740,5728],{},"Напишемо ",[2989,9737,9738],{},"Main",", що демонструє повний цикл CRUD через наш ",[2989,9741,9658],{},[3004,9743,9745],{"className":3541,"code":9744,"language":3543,"meta":3544,"style":3008},"package com.example.audiobook;\n\nimport com.example.audiobook.dao.AuthorDao;\nimport com.example.audiobook.db.ConnectionManager;\nimport com.example.audiobook.domain.Author;\n\nimport java.util.List;\nimport java.util.Optional;\nimport java.util.UUID;\n\npublic class Main {\n\n    public static void main(String[] args) {\n        // 1. Ініціалізація ConnectionManager — єдиний екземпляр на весь додаток\n        ConnectionManager connectionManager =\n            ConnectionManager.forH2(\"./data/audiobook_db\");\n\n        // 2. DAO отримує ConnectionManager через конструктор\n        AuthorDao authorDao = new AuthorDao(connectionManager);\n\n        // === CREATE ===\n        Author hesse = new Author(\"Герман\", \"Гессе\");\n        hesse.setBio(\"Нобелівський лауреат, автор «Степового вовка» та «Гри в бісер»\");\n\n        Author kafka = new Author(\"Франц\", \"Кафка\");\n        kafka.setBio(\"Майстер абсурду та екзистенційної прози\");\n\n        authorDao.save(hesse);\n        authorDao.save(kafka);\n        System.out.println(\"✓ Збережено: \" + hesse.fullName() + \", \" + kafka.fullName());\n\n        // === READ ===\n        Optional\u003CAuthor> found = authorDao.findById(hesse.getId());\n        found.ifPresent(a ->\n            System.out.println(\"✓ Знайдено: \" + a.fullName() + \" | Bio: \" + a.getBio())\n        );\n\n        List\u003CAuthor> all = authorDao.findAll();\n        System.out.println(\"✓ Всього авторів у БД: \" + all.size());\n\n        List\u003CAuthor> byName = authorDao.findByLastName(\"ка\");\n        byName.forEach(a -> System.out.println(\"  → Пошук 'ка': \" + a.fullName()));\n\n        // === UPDATE ===\n        hesse.setBio(\"Нобелівська премія з літератури 1946 року. Роман «Сіддхартха».\");\n        authorDao.update(hesse);\n        System.out.println(\"✓ Оновлено біографію: \" + hesse.fullName());\n\n        // === EXISTS / COUNT ===\n        System.out.println(\"✓ Гессе існує: \" + authorDao.existsById(hesse.getId()));\n        System.out.println(\"✓ Загальна кількість: \" + authorDao.count());\n\n        // === DELETE ===\n        boolean deleted = authorDao.deleteById(kafka.getId());\n        System.out.println(\"✓ Кафку видалено: \" + deleted);\n        System.out.println(\"✓ Кількість після видалення: \" + authorDao.count());\n    }\n}\n",[2989,9746,9747,9754,9758,9765,9771,9777,9781,9787,9793,9799,9803,9814,9818,9841,9846,9855,9872,9876,9881,9898,9902,9907,9933,9950,9954,9979,9995,9999,10012,10023,10067,10071,10076,10109,10125,10167,10171,10175,10198,10226,10230,10258,10300,10304,10309,10324,10335,10362,10366,10371,10407,10435,10439,10444,10471,10491,10518,10522],{"__ignoreMap":3008},[3012,9748,9749,9751],{"class":3014,"line":3015},[3012,9750,3551],{"class":3439},[3012,9752,9753],{"class":3231}," com.example.audiobook;\n",[3012,9755,9756],{"class":3014,"line":3021},[3012,9757,3055],{"emptyLinePlaceholder":3054},[3012,9759,9760,9762],{"class":3014,"line":3027},[3012,9761,3563],{"class":3439},[3012,9763,9764],{"class":3231}," com.example.audiobook.dao.AuthorDao;\n",[3012,9766,9767,9769],{"class":3014,"line":3033},[3012,9768,3563],{"class":3439},[3012,9770,7159],{"class":3231},[3012,9772,9773,9775],{"class":3014,"line":3039},[3012,9774,3563],{"class":3439},[3012,9776,4615],{"class":3231},[3012,9778,9779],{"class":3014,"line":3045},[3012,9780,3055],{"emptyLinePlaceholder":3054},[3012,9782,9783,9785],{"class":3014,"line":3051},[3012,9784,3563],{"class":3439},[3012,9786,4640],{"class":3231},[3012,9788,9789,9791],{"class":3014,"line":3058},[3012,9790,3563],{"class":3439},[3012,9792,4647],{"class":3231},[3012,9794,9795,9797],{"class":3014,"line":3064},[3012,9796,3563],{"class":3439},[3012,9798,3573],{"class":3231},[3012,9800,9801],{"class":3014,"line":3070},[3012,9802,3055],{"emptyLinePlaceholder":3054},[3012,9804,9805,9807,9809,9812],{"class":3014,"line":3076},[3012,9806,3607],{"class":3439},[3012,9808,3610],{"class":3439},[3012,9810,9811],{"class":3613}," Main",[3012,9813,3617],{"class":3231},[3012,9815,9816],{"class":3014,"line":3320},[3012,9817,3055],{"emptyLinePlaceholder":3054},[3012,9819,9820,9822,9824,9826,9829,9831,9833,9836,9839],{"class":3014,"line":3338},[3012,9821,3727],{"class":3439},[3012,9823,4707],{"class":3439},[3012,9825,4166],{"class":3613},[3012,9827,9828],{"class":3446}," main",[3012,9830,3472],{"class":3231},[3012,9832,3734],{"class":3613},[3012,9834,9835],{"class":3231},"[] ",[3012,9837,9838],{"class":3635},"args",[3012,9840,3745],{"class":3231},[3012,9842,9843],{"class":3014,"line":3356},[3012,9844,9845],{"class":3206},"        // 1. Ініціалізація ConnectionManager — єдиний екземпляр на весь додаток\n",[3012,9847,9848,9851,9853],{"class":3014,"line":3365},[3012,9849,9850],{"class":3613},"        ConnectionManager",[3012,9852,7259],{"class":3635},[3012,9854,4717],{"class":3231},[3012,9856,9857,9860,9862,9865,9867,9870],{"class":3014,"line":3665},[3012,9858,9859],{"class":3635},"            ConnectionManager",[3012,9861,3173],{"class":3231},[3012,9863,9864],{"class":3446},"forH2",[3012,9866,3472],{"class":3231},[3012,9868,9869],{"class":3991},"\"./data/audiobook_db\"",[3012,9871,3531],{"class":3231},[3012,9873,9874],{"class":3014,"line":3677},[3012,9875,3055],{"emptyLinePlaceholder":3054},[3012,9877,9878],{"class":3014,"line":3689},[3012,9879,9880],{"class":3206},"        // 2. DAO отримує ConnectionManager через конструктор\n",[3012,9882,9883,9886,9889,9891,9893,9895],{"class":3014,"line":3694},[3012,9884,9885],{"class":3613},"        AuthorDao",[3012,9887,9888],{"class":3635}," authorDao",[3012,9890,3759],{"class":3231},[3012,9892,5363],{"class":3984},[3012,9894,7242],{"class":3446},[3012,9896,9897],{"class":3231},"(connectionManager);\n",[3012,9899,9900],{"class":3014,"line":3700},[3012,9901,3055],{"emptyLinePlaceholder":3054},[3012,9903,9904],{"class":3014,"line":3706},[3012,9905,9906],{"class":3206},"        // === CREATE ===\n",[3012,9908,9909,9912,9915,9917,9919,9921,9923,9926,9928,9931],{"class":3014,"line":3712},[3012,9910,9911],{"class":3613},"        Author",[3012,9913,9914],{"class":3635}," hesse",[3012,9916,3759],{"class":3231},[3012,9918,5363],{"class":3984},[3012,9920,3614],{"class":3446},[3012,9922,3472],{"class":3231},[3012,9924,9925],{"class":3991},"\"Герман\"",[3012,9927,3098],{"class":3231},[3012,9929,9930],{"class":3991},"\"Гессе\"",[3012,9932,3531],{"class":3231},[3012,9934,9935,9938,9940,9943,9945,9948],{"class":3014,"line":3718},[3012,9936,9937],{"class":3635},"        hesse",[3012,9939,3173],{"class":3231},[3012,9941,9942],{"class":3446},"setBio",[3012,9944,3472],{"class":3231},[3012,9946,9947],{"class":3991},"\"Нобелівський лауреат, автор «Степового вовка» та «Гри в бісер»\"",[3012,9949,3531],{"class":3231},[3012,9951,9952],{"class":3014,"line":3724},[3012,9953,3055],{"emptyLinePlaceholder":3054},[3012,9955,9956,9958,9961,9963,9965,9967,9969,9972,9974,9977],{"class":3014,"line":3748},[3012,9957,9911],{"class":3613},[3012,9959,9960],{"class":3635}," kafka",[3012,9962,3759],{"class":3231},[3012,9964,5363],{"class":3984},[3012,9966,3614],{"class":3446},[3012,9968,3472],{"class":3231},[3012,9970,9971],{"class":3991},"\"Франц\"",[3012,9973,3098],{"class":3231},[3012,9975,9976],{"class":3991},"\"Кафка\"",[3012,9978,3531],{"class":3231},[3012,9980,9981,9984,9986,9988,9990,9993],{"class":3014,"line":3773},[3012,9982,9983],{"class":3635},"        kafka",[3012,9985,3173],{"class":3231},[3012,9987,9942],{"class":3446},[3012,9989,3472],{"class":3231},[3012,9991,9992],{"class":3991},"\"Майстер абсурду та екзистенційної прози\"",[3012,9994,3531],{"class":3231},[3012,9996,9997],{"class":3014,"line":3786},[3012,9998,3055],{"emptyLinePlaceholder":3054},[3012,10000,10001,10004,10006,10009],{"class":3014,"line":3799},[3012,10002,10003],{"class":3635},"        authorDao",[3012,10005,3173],{"class":3231},[3012,10007,10008],{"class":3446},"save",[3012,10010,10011],{"class":3231},"(hesse);\n",[3012,10013,10014,10016,10018,10020],{"class":3014,"line":3805},[3012,10015,10003],{"class":3635},[3012,10017,3173],{"class":3231},[3012,10019,10008],{"class":3446},[3012,10021,10022],{"class":3231},"(kafka);\n",[3012,10024,10025,10028,10030,10033,10035,10037,10039,10042,10044,10047,10049,10051,10053,10056,10058,10061,10063,10065],{"class":3014,"line":3810},[3012,10026,10027],{"class":3635},"        System",[3012,10029,3173],{"class":3231},[3012,10031,10032],{"class":3635},"out",[3012,10034,3173],{"class":3231},[3012,10036,5017],{"class":3446},[3012,10038,3472],{"class":3231},[3012,10040,10041],{"class":3991},"\"✓ Збережено: \"",[3012,10043,4494],{"class":3231},[3012,10045,10046],{"class":3635},"hesse",[3012,10048,3173],{"class":3231},[3012,10050,4497],{"class":3446},[3012,10052,4500],{"class":3231},[3012,10054,10055],{"class":3991},"\", \"",[3012,10057,4494],{"class":3231},[3012,10059,10060],{"class":3635},"kafka",[3012,10062,3173],{"class":3231},[3012,10064,4497],{"class":3446},[3012,10066,5035],{"class":3231},[3012,10068,10069],{"class":3014,"line":3815},[3012,10070,3055],{"emptyLinePlaceholder":3054},[3012,10072,10073],{"class":3014,"line":3821},[3012,10074,10075],{"class":3206},"        // === READ ===\n",[3012,10077,10078,10081,10083,10085,10087,10090,10092,10095,10097,10099,10101,10103,10105,10107],{"class":3014,"line":3827},[3012,10079,10080],{"class":3613},"        Optional",[3012,10082,3194],{"class":3231},[3012,10084,3537],{"class":3613},[3012,10086,5075],{"class":3231},[3012,10088,10089],{"class":3635},"found",[3012,10091,3759],{"class":3231},[3012,10093,10094],{"class":3635},"authorDao",[3012,10096,3173],{"class":3231},[3012,10098,5078],{"class":3446},[3012,10100,3472],{"class":3231},[3012,10102,10046],{"class":3635},[3012,10104,3173],{"class":3231},[3012,10106,4840],{"class":3446},[3012,10108,5035],{"class":3231},[3012,10110,10111,10114,10116,10119,10122],{"class":3014,"line":3833},[3012,10112,10113],{"class":3635},"        found",[3012,10115,3173],{"class":3231},[3012,10117,10118],{"class":3446},"ifPresent",[3012,10120,10121],{"class":3231},"(a ",[3012,10123,10124],{"class":3439},"->\n",[3012,10126,10127,10129,10131,10133,10135,10137,10139,10142,10144,10147,10149,10151,10153,10156,10158,10160,10162,10164],{"class":3014,"line":3838},[3012,10128,5007],{"class":3635},[3012,10130,3173],{"class":3231},[3012,10132,10032],{"class":3635},[3012,10134,3173],{"class":3231},[3012,10136,5017],{"class":3446},[3012,10138,3472],{"class":3231},[3012,10140,10141],{"class":3991},"\"✓ Знайдено: \"",[3012,10143,4494],{"class":3231},[3012,10145,10146],{"class":3635},"a",[3012,10148,3173],{"class":3231},[3012,10150,4497],{"class":3446},[3012,10152,4500],{"class":3231},[3012,10154,10155],{"class":3991},"\" | Bio: \"",[3012,10157,4494],{"class":3231},[3012,10159,10146],{"class":3635},[3012,10161,3173],{"class":3231},[3012,10163,4887],{"class":3446},[3012,10165,10166],{"class":3231},"())\n",[3012,10168,10169],{"class":3014,"line":3865},[3012,10170,5691],{"class":3231},[3012,10172,10173],{"class":3014,"line":3881},[3012,10174,3055],{"emptyLinePlaceholder":3054},[3012,10176,10177,10179,10181,10183,10185,10188,10190,10192,10194,10196],{"class":3014,"line":3893},[3012,10178,5350],{"class":3613},[3012,10180,3194],{"class":3231},[3012,10182,3537],{"class":3613},[3012,10184,5075],{"class":3231},[3012,10186,10187],{"class":3635},"all",[3012,10189,3759],{"class":3231},[3012,10191,10094],{"class":3635},[3012,10193,3173],{"class":3231},[3012,10195,5330],{"class":3446},[3012,10197,3770],{"class":3231},[3012,10199,10200,10202,10204,10206,10208,10210,10212,10215,10217,10219,10221,10224],{"class":3014,"line":3904},[3012,10201,10027],{"class":3635},[3012,10203,3173],{"class":3231},[3012,10205,10032],{"class":3635},[3012,10207,3173],{"class":3231},[3012,10209,5017],{"class":3446},[3012,10211,3472],{"class":3231},[3012,10213,10214],{"class":3991},"\"✓ Всього авторів у БД: \"",[3012,10216,4494],{"class":3231},[3012,10218,10187],{"class":3635},[3012,10220,3173],{"class":3231},[3012,10222,10223],{"class":3446},"size",[3012,10225,5035],{"class":3231},[3012,10227,10228],{"class":3014,"line":3915},[3012,10229,3055],{"emptyLinePlaceholder":3054},[3012,10231,10232,10234,10236,10238,10240,10243,10245,10247,10249,10251,10253,10256],{"class":3014,"line":3928},[3012,10233,5350],{"class":3613},[3012,10235,3194],{"class":3231},[3012,10237,3537],{"class":3613},[3012,10239,5075],{"class":3231},[3012,10241,10242],{"class":3635},"byName",[3012,10244,3759],{"class":3231},[3012,10246,10094],{"class":3635},[3012,10248,3173],{"class":3231},[3012,10250,8158],{"class":3446},[3012,10252,3472],{"class":3231},[3012,10254,10255],{"class":3991},"\"ка\"",[3012,10257,3531],{"class":3231},[3012,10259,10260,10263,10265,10268,10270,10273,10276,10278,10280,10282,10284,10286,10289,10291,10293,10295,10297],{"class":3014,"line":3941},[3012,10261,10262],{"class":3635},"        byName",[3012,10264,3173],{"class":3231},[3012,10266,10267],{"class":3446},"forEach",[3012,10269,10121],{"class":3231},[3012,10271,10272],{"class":3439},"->",[3012,10274,10275],{"class":3635}," System",[3012,10277,3173],{"class":3231},[3012,10279,10032],{"class":3635},[3012,10281,3173],{"class":3231},[3012,10283,5017],{"class":3446},[3012,10285,3472],{"class":3231},[3012,10287,10288],{"class":3991},"\"  → Пошук 'ка': \"",[3012,10290,4494],{"class":3231},[3012,10292,10146],{"class":3635},[3012,10294,3173],{"class":3231},[3012,10296,4497],{"class":3446},[3012,10298,10299],{"class":3231},"()));\n",[3012,10301,10302],{"class":3014,"line":3946},[3012,10303,3055],{"emptyLinePlaceholder":3054},[3012,10305,10306],{"class":3014,"line":3951},[3012,10307,10308],{"class":3206},"        // === UPDATE ===\n",[3012,10310,10311,10313,10315,10317,10319,10322],{"class":3014,"line":3957},[3012,10312,9937],{"class":3635},[3012,10314,3173],{"class":3231},[3012,10316,9942],{"class":3446},[3012,10318,3472],{"class":3231},[3012,10320,10321],{"class":3991},"\"Нобелівська премія з літератури 1946 року. Роман «Сіддхартха».\"",[3012,10323,3531],{"class":3231},[3012,10325,10326,10328,10330,10333],{"class":3014,"line":3962},[3012,10327,10003],{"class":3635},[3012,10329,3173],{"class":3231},[3012,10331,10332],{"class":3446},"update",[3012,10334,10011],{"class":3231},[3012,10336,10337,10339,10341,10343,10345,10347,10349,10352,10354,10356,10358,10360],{"class":3014,"line":3968},[3012,10338,10027],{"class":3635},[3012,10340,3173],{"class":3231},[3012,10342,10032],{"class":3635},[3012,10344,3173],{"class":3231},[3012,10346,5017],{"class":3446},[3012,10348,3472],{"class":3231},[3012,10350,10351],{"class":3991},"\"✓ Оновлено біографію: \"",[3012,10353,4494],{"class":3231},[3012,10355,10046],{"class":3635},[3012,10357,3173],{"class":3231},[3012,10359,4497],{"class":3446},[3012,10361,5035],{"class":3231},[3012,10363,10364],{"class":3014,"line":3981},[3012,10365,3055],{"emptyLinePlaceholder":3054},[3012,10367,10368],{"class":3014,"line":3998},[3012,10369,10370],{"class":3206},"        // === EXISTS / COUNT ===\n",[3012,10372,10373,10375,10377,10379,10381,10383,10385,10388,10390,10392,10394,10397,10399,10401,10403,10405],{"class":3014,"line":4003},[3012,10374,10027],{"class":3635},[3012,10376,3173],{"class":3231},[3012,10378,10032],{"class":3635},[3012,10380,3173],{"class":3231},[3012,10382,5017],{"class":3446},[3012,10384,3472],{"class":3231},[3012,10386,10387],{"class":3991},"\"✓ Гессе існує: \"",[3012,10389,4494],{"class":3231},[3012,10391,10094],{"class":3635},[3012,10393,3173],{"class":3231},[3012,10395,10396],{"class":3446},"existsById",[3012,10398,3472],{"class":3231},[3012,10400,10046],{"class":3635},[3012,10402,3173],{"class":3231},[3012,10404,4840],{"class":3446},[3012,10406,10299],{"class":3231},[3012,10408,10409,10411,10413,10415,10417,10419,10421,10424,10426,10428,10430,10433],{"class":3014,"line":4008},[3012,10410,10027],{"class":3635},[3012,10412,3173],{"class":3231},[3012,10414,10032],{"class":3635},[3012,10416,3173],{"class":3231},[3012,10418,5017],{"class":3446},[3012,10420,3472],{"class":3231},[3012,10422,10423],{"class":3991},"\"✓ Загальна кількість: \"",[3012,10425,4494],{"class":3231},[3012,10427,10094],{"class":3635},[3012,10429,3173],{"class":3231},[3012,10431,10432],{"class":3446},"count",[3012,10434,5035],{"class":3231},[3012,10436,10437],{"class":3014,"line":4014},[3012,10438,3055],{"emptyLinePlaceholder":3054},[3012,10440,10441],{"class":3014,"line":4027},[3012,10442,10443],{"class":3206},"        // === DELETE ===\n",[3012,10445,10446,10449,10452,10454,10456,10458,10461,10463,10465,10467,10469],{"class":3014,"line":4050},[3012,10447,10448],{"class":3613},"        boolean",[3012,10450,10451],{"class":3635}," deleted",[3012,10453,3759],{"class":3231},[3012,10455,10094],{"class":3635},[3012,10457,3173],{"class":3231},[3012,10459,10460],{"class":3446},"deleteById",[3012,10462,3472],{"class":3231},[3012,10464,10060],{"class":3635},[3012,10466,3173],{"class":3231},[3012,10468,4840],{"class":3446},[3012,10470,5035],{"class":3231},[3012,10472,10473,10475,10477,10479,10481,10483,10485,10488],{"class":3014,"line":4055},[3012,10474,10027],{"class":3635},[3012,10476,3173],{"class":3231},[3012,10478,10032],{"class":3635},[3012,10480,3173],{"class":3231},[3012,10482,5017],{"class":3446},[3012,10484,3472],{"class":3231},[3012,10486,10487],{"class":3991},"\"✓ Кафку видалено: \"",[3012,10489,10490],{"class":3231}," + deleted);\n",[3012,10492,10493,10495,10497,10499,10501,10503,10505,10508,10510,10512,10514,10516],{"class":3014,"line":4060},[3012,10494,10027],{"class":3635},[3012,10496,3173],{"class":3231},[3012,10498,10032],{"class":3635},[3012,10500,3173],{"class":3231},[3012,10502,5017],{"class":3446},[3012,10504,3472],{"class":3231},[3012,10506,10507],{"class":3991},"\"✓ Кількість після видалення: \"",[3012,10509,4494],{"class":3231},[3012,10511,10094],{"class":3635},[3012,10513,3173],{"class":3231},[3012,10515,10432],{"class":3446},[3012,10517,5035],{"class":3231},[3012,10519,10520],{"class":3014,"line":4066},[3012,10521,3802],{"class":3231},[3012,10523,10524],{"class":3014,"line":4085},[3012,10525,4516],{"class":3231},[2964,10527,10528],{},"При запуску програма виведе:",[3004,10530,10533],{"className":10531,"code":10532,"language":3384},[3381],"✓ Збережено: Гессе Герман, Кафка Франц\n✓ Знайдено: Гессе Герман | Bio: Нобелівський лауреат, автор «Степового вовка» та «Гри в бісер»\n✓ Всього авторів у БД: 2\n  → Пошук 'ка': Кафка Франц\n✓ Оновлено біографію: Гессе Герман\n✓ Гессе існує: true\n✓ Загальна кількість: 2\n✓ Кафку видалено: true\n✓ Кількість після видалення: 1\n",[2989,10534,10532],{"__ignoreMap":3008},[3416,10536],{},[2959,10538,10540],{"id":10539},"підсумок-що-ми-здобули-і-чого-ще-бракує","Підсумок: що ми здобули і чого ще бракує",[2964,10542,10543],{},"Порівняємо наївний та виправлений підходи:",[10545,10546,10547,10564],"table",{},[10548,10549,10550],"thead",{},[10551,10552,10553,10558,10561],"tr",{},[10554,10555,10557],"th",{"align":10556},"left","Аспект",[10554,10559,10560],{"align":10556},"Наївний підхід",[10554,10562,10563],{"align":10556},"Виправлений підхід",[10565,10566,10567,10584,10601,10613,10628],"tbody",{},[10551,10568,10569,10573,10576],{},[10570,10571,10572],"td",{"align":10556},"SQL-безпека",[10570,10574,10575],{"align":10556},"❌ Конкатенація рядків",[10570,10577,10578,10579,10581,10582],{"align":10556},"✅ ",[2989,10580,3134],{}," з ",[2989,10583,3138],{},[10551,10585,10586,10589,10597],{},[10570,10587,10588],{"align":10556},"Ресурси",[10570,10590,10591,10592,10594,10595],{"align":10556},"❌ Витік ",[2989,10593,3112],{},"/",[2989,10596,3142],{},[10570,10598,10578,10599],{"align":10556},[2989,10600,6112],{},[10551,10602,10603,10606,10609],{},[10570,10604,10605],{"align":10556},"Підключення",[10570,10607,10608],{"align":10556},"❌ URL дубльований у кожному методі",[10570,10610,10578,10611],{"align":10556},[2989,10612,6294],{},[10551,10614,10615,10618,10624],{},[10570,10616,10617],{"align":10556},"Помилки",[10570,10619,10620,10621],{"align":10556},"❌ Silent failure через ",[2989,10622,10623],{},"System.err",[10570,10625,10578,10626],{"align":10556},[2989,10627,6775],{},[10551,10629,10630,10633,10638],{},[10570,10631,10632],{"align":10556},"Маппінг",[10570,10634,10578,10635,10637],{"align":10556},[2989,10636,5710],{}," централізований",[10570,10639,10578,10640,10637],{"align":10556},[2989,10641,5710],{},[2964,10643,10644],{},"Проте навіть виправлена реалізація має суттєві недоліки, що стануть очевидними при масштабуванні:",[10646,10647,10648,10661,10690,10698],"card-group",{},[10649,10650,10653,10654,10657,10658,10660],"card",{"icon":10651,"title":10652},"i-heroicons-clock","Дороге створення з'єднань","Кожен метод викликає ",[2989,10655,10656],{},"connectionManager.getConnection()"," — а це означає нове TCP-з'єднання з БД щоразу. При 100 одночасних запитах — 100 нових з'єднань.\n",[2971,10659,5868],{}," Connection Pool (стаття 11).",[10649,10662,10665,3098,10668,3098,10671,10674,10675,3098,10677,3098,10679,3098,10681,10683,10684,10686,10687,10689],{"icon":10663,"title":10664},"i-heroicons-document-duplicate","Дублювання між DAO",[2989,10666,10667],{},"GenreDao",[2989,10669,10670],{},"UserDao",[2989,10672,10673],{},"AudiobookDao"," матимуть ідентичну структуру: ті самі методи ",[2989,10676,5078],{},[2989,10678,5330],{},[2989,10680,10460],{},[2989,10682,10432],{},". Відрізняється лише SQL та ",[2989,10685,5710],{},".\n",[2971,10688,5868],{}," Abstract Repository (стаття 14).",[10649,10691,10694,10695,10697],{"icon":10692,"title":10693},"i-heroicons-arrow-path","Немає транзакцій","Операція \"зберегти аудіокнигу + оновити лічильник жанру\" складається з двох SQL-запитів. Якщо перший успішний, а другий — ні, дані стають інконсистентними.\n",[2971,10696,5868],{}," Unit of Work (стаття 16).",[10649,10699,10702,10703,10705],{"icon":10700,"title":10701},"i-heroicons-signal","Проблема N+1","Завантаження 50 аудіокниг і потім автора кожної — 51 запит замість одного JOIN. Ручний маппінг не має механізму \"ледачого\" завантаження.\n",[2971,10704,5868],{}," Proxy + Lazy Loading (стаття 18).",[3416,10707],{},[2959,10709,10711],{"id":10710},"завдання-для-закріплення","Завдання для закріплення",[10713,10714,10716,10728,10786],"collapsible",{"title":10715},"Рівень 1: GenreDao",[2964,10717,10718,10719,10721,10722,10724,10725,5728],{},"Реалізуйте ",[2989,10720,10667],{}," за аналогією до ",[2989,10723,9658],{}," для таблиці ",[2989,10726,10727],{},"genres",[3004,10729,10731],{"className":3430,"code":10730,"language":3432,"meta":3008,"style":3008},"CREATE TABLE genres (\n    id          UUID        PRIMARY KEY,\n    name        VARCHAR(64) NOT NULL UNIQUE,\n    description TEXT\n);\n",[2989,10732,10733,10744,10753,10774,10782],{"__ignoreMap":3008},[3012,10734,10735,10737,10739,10742],{"class":3014,"line":3015},[3012,10736,3440],{"class":3439},[3012,10738,3443],{"class":3439},[3012,10740,10741],{"class":3446}," genres",[3012,10743,3450],{"class":3231},[3012,10745,10746,10749,10751],{"class":3014,"line":3021},[3012,10747,10748],{"class":3231},"    id          UUID        ",[3012,10750,3458],{"class":3439},[3012,10752,3461],{"class":3231},[3012,10754,10755,10758,10761,10763,10765,10767,10769,10772],{"class":3014,"line":3027},[3012,10756,10757],{"class":3439},"    name",[3012,10759,10760],{"class":3439},"        VARCHAR",[3012,10762,3472],{"class":3231},[3012,10764,3476],{"class":3475},[3012,10766,5560],{"class":3231},[3012,10768,3482],{"class":3439},[3012,10770,10771],{"class":3439}," UNIQUE",[3012,10773,3461],{"class":3231},[3012,10775,10776,10779],{"class":3014,"line":3033},[3012,10777,10778],{"class":3439},"    description",[3012,10780,10781],{"class":3439}," TEXT\n",[3012,10783,10784],{"class":3014,"line":3039},[3012,10785,3531],{"class":3231},[10787,10788,10789,10808,10826],"ol",{},[4526,10790,10791,10792,3098,10794,3098,10797,3098,10799,3098,10802,3098,10805],{},"Реалізуйте методи: ",[2989,10793,5727],{},[2989,10795,10796],{},"findById()",[2989,10798,9697],{},[2989,10800,10801],{},"findByName()",[2989,10803,10804],{},"update()",[2989,10806,10807],{},"deleteById()",[4526,10809,10810,10811,10813,10814,10817,10818,10821,10822,10825],{},"Метод ",[2989,10812,10801],{}," має шукати точний збіг (без ",[2989,10815,10816],{},"LIKE","), оскільки ",[2989,10819,10820],{},"name"," має ",[2989,10823,10824],{},"UNIQUE"," constraint",[4526,10827,10828],{},"Поясніть, що станеться при спробі зберегти жанр з іменем, що вже існує у таблиці",[10713,10830,10832,10847,10948],{"title":10831},"Рівень 2: UserDao з nullable полями",[2964,10833,10718,10834,10724,10836,10839,10840,4570,10843,10846],{},[2989,10835,10670],{},[2989,10837,10838],{},"users",". Зверніть увагу: поля ",[2989,10841,10842],{},"email",[2989,10844,10845],{},"avatar_path"," є nullable:",[3004,10848,10850],{"className":3430,"code":10849,"language":3432,"meta":3008,"style":3008},"CREATE TABLE users (\n    id            UUID         PRIMARY KEY,\n    username      VARCHAR(64)  NOT NULL UNIQUE,\n    password_hash VARCHAR(128) NOT NULL,\n    email         VARCHAR(376),      -- nullable\n    avatar_path   VARCHAR(2048)      -- nullable\n);\n",[2989,10851,10852,10863,10872,10892,10910,10928,10944],{"__ignoreMap":3008},[3012,10853,10854,10856,10858,10861],{"class":3014,"line":3015},[3012,10855,3440],{"class":3439},[3012,10857,3443],{"class":3439},[3012,10859,10860],{"class":3446}," users",[3012,10862,3450],{"class":3231},[3012,10864,10865,10868,10870],{"class":3014,"line":3021},[3012,10866,10867],{"class":3231},"    id            UUID         ",[3012,10869,3458],{"class":3439},[3012,10871,3461],{"class":3231},[3012,10873,10874,10877,10879,10881,10883,10886,10888,10890],{"class":3014,"line":3027},[3012,10875,10876],{"class":3231},"    username      ",[3012,10878,3469],{"class":3439},[3012,10880,3472],{"class":3231},[3012,10882,3476],{"class":3475},[3012,10884,10885],{"class":3231},")  ",[3012,10887,3482],{"class":3439},[3012,10889,10771],{"class":3439},[3012,10891,3461],{"class":3231},[3012,10893,10894,10897,10899,10901,10904,10906,10908],{"class":3014,"line":3033},[3012,10895,10896],{"class":3231},"    password_hash ",[3012,10898,3469],{"class":3439},[3012,10900,3472],{"class":3231},[3012,10902,10903],{"class":3475},"128",[3012,10905,5560],{"class":3231},[3012,10907,3482],{"class":3439},[3012,10909,3461],{"class":3231},[3012,10911,10912,10915,10917,10919,10922,10925],{"class":3014,"line":3039},[3012,10913,10914],{"class":3231},"    email         ",[3012,10916,3469],{"class":3439},[3012,10918,3472],{"class":3231},[3012,10920,10921],{"class":3475},"376",[3012,10923,10924],{"class":3231},"),      ",[3012,10926,10927],{"class":3206},"-- nullable\n",[3012,10929,10930,10933,10935,10937,10939,10942],{"class":3014,"line":3045},[3012,10931,10932],{"class":3231},"    avatar_path   ",[3012,10934,3469],{"class":3439},[3012,10936,3472],{"class":3231},[3012,10938,3523],{"class":3475},[3012,10940,10941],{"class":3231},")      ",[3012,10943,10927],{"class":3206},[3012,10945,10946],{"class":3014,"line":3051},[3012,10947,3531],{"class":3231},[10787,10949,10950,10963,10979,10986],{},[4526,10951,10952,10953,10955,10956,10959,10960],{},"У методі ",[2989,10954,5727],{}," переконайтеся, що ",[2989,10957,10958],{},"setString(i, null)"," коректно передає SQL ",[2989,10961,10962],{},"NULL",[4526,10964,6063,10965,10967,10968,10971,10972,10974,10975,10978],{},[2989,10966,5710],{}," перевірте: ",[2989,10969,10970],{},"rs.getString(\"email\")"," повертає ",[2989,10973,4035],{}," коли значення NULL — переконайтеся, що клас ",[2989,10976,10977],{},"User"," це коректно обробляє",[4526,10980,10981,10982,10985],{},"Додайте метод ",[2989,10983,10984],{},"findByUsername(String username)"," — пошук за унікальним полем",[4526,10987,10981,10988,10991],{},[2989,10989,10990],{},"findByEmail(String email)"," з урахуванням, що email може бути null (запит повинен шукати лише серед не-NULL значень)",[10713,10993,10995,11011,11038,11225],{"title":10994},"Рівень 3: Транзакційне збереження AudiobookDao",[2964,10996,10997,10999,11000,11002,11003,4570,11005,11007,11008,5728],{},[2989,10998,10673],{}," складніший за ",[2989,11001,9658],{}," — аудіокнига містить зовнішні ключі на ",[2989,11004,2991],{},[2989,11006,10727],{},". Крім того, при збереженні аудіокниги часто потрібно зберегти й пов'язані ",[2989,11009,11010],{},"AudiobookFile",[10787,11012,11013,11022,11031],{},[4526,11014,10718,11015,11018,11019],{},[2989,11016,11017],{},"AudiobookDao.save(Audiobook audiobook)"," — INSERT лише в ",[2989,11020,11021],{},"audiobooks",[4526,11023,10718,11024,11027,11028],{},[2989,11025,11026],{},"AudiobookFileDao.save(AudiobookFile file)"," — INSERT в ",[2989,11029,11030],{},"audiobook_files",[4526,11032,11033,11034,11037],{},"Напишіть метод ",[2989,11035,11036],{},"saveWithFiles(Audiobook audiobook, List\u003CAudiobookFile> files)",", що виконує обидва збереження в одній транзакції:",[3004,11039,11041],{"className":3541,"code":11040,"language":3543,"meta":3008,"style":3008},"Connection conn = connectionManager.getConnection();\nconn.setAutoCommit(false); // Починаємо транзакцію вручну\ntry {\n    audiobookDao.save(conn, audiobook);   // Перевантажений метод, що приймає Connection\n    for (AudiobookFile f : files) {\n        fileDao.save(conn, f);\n    }\n    conn.commit();\n} catch (Exception e) {\n    conn.rollback();\n    throw new DatabaseException(\"Збереження аудіокниги провалилось\", e);\n} finally {\n    conn.setAutoCommit(true);\n    conn.close();\n}\n",[2989,11042,11043,11059,11078,11084,11099,11117,11129,11133,11145,11160,11171,11187,11196,11210,11221],{"__ignoreMap":3008},[3012,11044,11045,11047,11049,11051,11053,11055,11057],{"class":3014,"line":3015},[3012,11046,3112],{"class":3613},[3012,11048,4929],{"class":3635},[3012,11050,3759],{"class":3231},[3012,11052,6923],{"class":3635},[3012,11054,3173],{"class":3231},[3012,11056,4938],{"class":3446},[3012,11058,3770],{"class":3231},[3012,11060,11061,11063,11065,11068,11070,11073,11075],{"class":3014,"line":3021},[3012,11062,4954],{"class":3635},[3012,11064,3173],{"class":3231},[3012,11066,11067],{"class":3446},"setAutoCommit",[3012,11069,3472],{"class":3231},[3012,11071,11072],{"class":3439},"false",[3012,11074,5830],{"class":3231},[3012,11076,11077],{"class":3206},"// Починаємо транзакцію вручну\n",[3012,11079,11080,11082],{"class":3014,"line":3027},[3012,11081,6133],{"class":3984},[3012,11083,3617],{"class":3231},[3012,11085,11086,11089,11091,11093,11096],{"class":3014,"line":3033},[3012,11087,11088],{"class":3635},"    audiobookDao",[3012,11090,3173],{"class":3231},[3012,11092,10008],{"class":3446},[3012,11094,11095],{"class":3231},"(conn, audiobook);   ",[3012,11097,11098],{"class":3206},"// Перевантажений метод, що приймає Connection\n",[3012,11100,11101,11104,11106,11108,11111,11114],{"class":3014,"line":3039},[3012,11102,11103],{"class":3984},"    for",[3012,11105,4336],{"class":3231},[3012,11107,11010],{"class":3613},[3012,11109,11110],{"class":3635}," f",[3012,11112,11113],{"class":3984}," :",[3012,11115,11116],{"class":3231}," files) {\n",[3012,11118,11119,11122,11124,11126],{"class":3014,"line":3045},[3012,11120,11121],{"class":3635},"        fileDao",[3012,11123,3173],{"class":3231},[3012,11125,10008],{"class":3446},[3012,11127,11128],{"class":3231},"(conn, f);\n",[3012,11130,11131],{"class":3014,"line":3051},[3012,11132,3802],{"class":3231},[3012,11134,11135,11138,11140,11143],{"class":3014,"line":3058},[3012,11136,11137],{"class":3635},"    conn",[3012,11139,3173],{"class":3231},[3012,11141,11142],{"class":3446},"commit",[3012,11144,3770],{"class":3231},[3012,11146,11147,11149,11151,11153,11156,11158],{"class":3014,"line":3064},[3012,11148,6240],{"class":3231},[3012,11150,4987],{"class":3984},[3012,11152,4336],{"class":3231},[3012,11154,11155],{"class":3613},"Exception",[3012,11157,4995],{"class":3635},[3012,11159,3745],{"class":3231},[3012,11161,11162,11164,11166,11169],{"class":3014,"line":3070},[3012,11163,11137],{"class":3635},[3012,11165,3173],{"class":3231},[3012,11167,11168],{"class":3446},"rollback",[3012,11170,3770],{"class":3231},[3012,11172,11173,11176,11178,11180,11182,11185],{"class":3014,"line":3076},[3012,11174,11175],{"class":3984},"    throw",[3012,11177,5576],{"class":3984},[3012,11179,6567],{"class":3446},[3012,11181,3472],{"class":3231},[3012,11183,11184],{"class":3991},"\"Збереження аудіокниги провалилось\"",[3012,11186,8104],{"class":3231},[3012,11188,11189,11191,11194],{"class":3014,"line":3320},[3012,11190,6240],{"class":3231},[3012,11192,11193],{"class":3984},"finally",[3012,11195,3617],{"class":3231},[3012,11197,11198,11200,11202,11204,11206,11208],{"class":3014,"line":3338},[3012,11199,11137],{"class":3635},[3012,11201,3173],{"class":3231},[3012,11203,11067],{"class":3446},[3012,11205,3472],{"class":3231},[3012,11207,3162],{"class":3439},[3012,11209,3531],{"class":3231},[3012,11211,11212,11214,11216,11219],{"class":3014,"line":3356},[3012,11213,11137],{"class":3635},[3012,11215,3173],{"class":3231},[3012,11217,11218],{"class":3446},"close",[3012,11220,3770],{"class":3231},[3012,11222,11223],{"class":3014,"line":3365},[3012,11224,4516],{"class":3231},[2964,11226,11227,11228,11230],{},"Поясніть, чому передача 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