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

.. image:: uml/uml.png :alt: Alt Repository UML Diagram :align: center

Code

You can also find this code on GitHub_

Post.php

.. literalinclude:: Domain/Post.php :language: php :linenos:

PostId.php

.. literalinclude:: Domain/PostId.php :language: php :linenos:

PostStatus.php

.. literalinclude:: Domain/PostStatus.php :language: php :linenos:

PostRepository.php

.. literalinclude:: PostRepository.php :language: php :linenos:

Persistence.php

.. literalinclude:: Persistence.php :language: php :linenos:

InMemoryPersistence.php

.. literalinclude:: InMemoryPersistence.php :language: php :linenos:

Test

Tests/PostRepositoryTest.php

.. literalinclude:: Tests/PostRepositoryTest.php :language: php :linenos:

.. _GitHub: https://github.com/DesignPatternsPHP/DesignPatternsPHP/tree/main/More/Repository