State

Purpose

Encapsulate varying behavior for the same routine based on an object's state. This can be a cleaner way for an object to change its behavior at runtime without resorting to large monolithic conditional statements.

UML Diagram

Code

You can also find this code on GitHub

OrderContext.php

.. literalinclude:: OrderContext.php
   :language: php
   :linenos:

State.php

.. literalinclude:: State.php
   :language: php
   :linenos:

StateCreated.php

.. literalinclude:: StateCreated.php
   :language: php
   :linenos:

StateShipped.php

.. literalinclude:: StateShipped.php
   :language: php
   :linenos:

StateDone.php

.. literalinclude:: StateDone.php
   :language: php
   :linenos:

Test

Tests/StateTest.php

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