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Behavioral/TemplateMethod/index.rst

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+Template Method
+===============
+
+Purpose
+-------
+
+Template Method is a behavioral design pattern.
+
+Perhaps you have encountered it many times already. The idea is to let
+subclasses of this abstract template "finish" the behavior of an
+algorithm.
+
+A.k.a the "Hollywood principle": "Don't call us, we call you." This
+class is not called by subclasses but the inverse. How? With abstraction
+of course.
+
+In other words, this is a skeleton of algorithm, well-suited for
+framework libraries. The user has just to implement one method and the
+superclass do the job.
+
+It is an easy way to decouple concrete classes and reduce copy-paste,
+that's why you'll find it everywhere.
+
+UML Diagram
+-----------
+
+.. image:: uml/uml.png
+   :alt: Alt TemplateMethod UML Diagram
+   :align: center
+
+Code
+----
+
+You can also find these code on `GitHub`_
+
+CityJourney.php
+
+.. literalinclude:: CityJourney.php
+   :language: php
+   :linenos:
+
+Journey.php
+
+.. literalinclude:: Journey.php
+   :language: php
+   :linenos:
+
+BeachJourney.php
+
+.. literalinclude:: BeachJourney.php
+   :language: php
+   :linenos:
+
+Test
+----
+
+Tests/JourneyTest.php
+
+.. literalinclude:: Tests/JourneyTest.php
+   :language: php
+   :linenos:
+
+.. _`GitHub`: https://github.com/domnikl/DesignPatternsPHP/tree/master/Behavioral/TemplateMethod