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71 lines
1.2 KiB
ReStructuredText
71 lines
1.2 KiB
ReStructuredText
`Strategy`__
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============
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Terminology:
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------------
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- Context
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- Strategy
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- Concrete Strategy
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Purpose
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-------
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To separate strategies and to enable fast switching between them. Also
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this pattern is a good alternative to inheritance (instead of having an
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abstract class that is extended).
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Examples
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--------
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- sorting a list of objects, one strategy by date, the other by id
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- simplify unit testing: e.g. switching between file and in-memory
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storage
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UML Diagram
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-----------
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.. image:: uml/uml.png
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:alt: Alt Strategy UML Diagram
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:align: center
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Code
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----
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You can also find this code on `GitHub`_
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Context.php
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.. literalinclude:: Context.php
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:language: php
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:linenos:
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Comparator.php
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.. literalinclude:: Comparator.php
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:language: php
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:linenos:
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DateComparator.php
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.. literalinclude:: DateComparator.php
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:language: php
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:linenos:
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IdComparator.php
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.. literalinclude:: IdComparator.php
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:language: php
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:linenos:
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Test
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----
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Tests/StrategyTest.php
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.. literalinclude:: Tests/StrategyTest.php
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:language: php
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:linenos:
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.. _`GitHub`: https://github.com/DesignPatternsPHP/DesignPatternsPHP/tree/main/Behavioral/Strategy
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.. __: http://en.wikipedia.org/wiki/Strategy_pattern |