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Repository

Purpose

Mediates between the domain and data mapping layers using a collection-like interface for accessing domain objects. Repository encapsulates the set of objects persisted in a data store and the operations performed over them, providing a more object-oriented view of the persistence layer. Repository also supports the objective of achieving a clean separation and one-way dependency between the domain and data mapping layers.

Examples

  • Doctrine 2 ORM: there is Repository that mediates between Entity and DBAL and contains methods to retrieve objects
  • Laravel Framework

UML Diagram

Alt Repository UML Diagram

Code

You can also find this code on GitHub

Post.php

Domain/Post.php

PostId.php

Domain/PostId.php

PostStatus.php

Domain/PostStatus.php

PostRepository.php

PostRepository.php

Persistence.php

Persistence.php

InMemoryPersistence.php

InMemoryPersistence.php

Test

Tests/PostRepositoryTest.php

Tests/PostRepositoryTest.php