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Builder

Purpose

Builder is an interface that build parts of a complex object.

Sometimes, if the builder has a better knowledge of what it builds, this interface could be an abstract class with default methods (aka adapter).

If you have a complex inheritance tree for objects, it is logical to have a complex inheritance tree for builders too.

Note: Builders have often a fluent interface, see the mock builder of PHPUnit for example.

Examples

  • PHPUnit: Mock Builder

UML Diagram

Alt Builder UML Diagram

Code

You can also find this code on GitHub

Director.php

.. literalinclude:: Director.php
   :language: php
   :linenos:

BuilderInterface.php

.. literalinclude:: BuilderInterface.php
   :language: php
   :linenos:

TruckBuilder.php

.. literalinclude:: TruckBuilder.php
   :language: php
   :linenos:

CarBuilder.php

.. literalinclude:: CarBuilder.php
   :language: php
   :linenos:

Parts/Vehicle.php

.. literalinclude:: Parts/Vehicle.php
   :language: php
   :linenos:

Parts/Truck.php

.. literalinclude:: Parts/Truck.php
   :language: php
   :linenos:

Parts/Car.php

.. literalinclude:: Parts/Car.php
   :language: php
   :linenos:

Parts/Engine.php

.. literalinclude:: Parts/Engine.php
   :language: php
   :linenos:

Parts/Wheel.php

.. literalinclude:: Parts/Wheel.php
   :language: php
   :linenos:

Parts/Door.php

.. literalinclude:: Parts/Door.php
   :language: php
   :linenos:

Test

Tests/DirectorTest.php

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