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Adapter / Wrapper

Purpose

To translate one interface for a class into a compatible interface. An adapter allows classes to work together that normally could not because of incompatible interfaces by providing its interface to clients while using the original interface.

Examples

  • DB Client libraries adapter
  • using multiple different webservices and adapters normalize data so that the outcome is the same for all

UML Diagram

Alt Adapter UML Diagram

Code

You can also find this code on GitHub

BookInterface.php

.. literalinclude:: BookInterface.php
   :language: php
   :linenos:

Book.php

.. literalinclude:: Book.php
   :language: php
   :linenos:

EBookAdapter.php

.. literalinclude:: EBookAdapter.php
   :language: php
   :linenos:

EBookInterface.php

.. literalinclude:: EBookInterface.php
   :language: php
   :linenos:

Kindle.php

.. literalinclude:: Kindle.php
   :language: php
   :linenos:

Test

Tests/AdapterTest.php

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