mirror of
https://github.com/DesignPatternsPHP/DesignPatternsPHP.git
synced 2025-02-24 01:32:22 +01:00
71 lines
1.2 KiB
ReStructuredText
71 lines
1.2 KiB
ReStructuredText
`Strategy`__
|
|
============
|
|
|
|
Terminology:
|
|
------------
|
|
|
|
- Context
|
|
- Strategy
|
|
- Concrete Strategy
|
|
|
|
Purpose
|
|
-------
|
|
|
|
To separate strategies and to enable fast switching between them. Also
|
|
this pattern is a good alternative to inheritance (instead of having an
|
|
abstract class that is extended).
|
|
|
|
Examples
|
|
--------
|
|
|
|
- sorting a list of objects, one strategy by date, the other by id
|
|
- simplify unit testing: e.g. switching between file and in-memory
|
|
storage
|
|
|
|
UML Diagram
|
|
-----------
|
|
|
|
.. image:: uml/uml.png
|
|
:alt: Alt Strategy UML Diagram
|
|
:align: center
|
|
|
|
Code
|
|
----
|
|
|
|
You can also find these code on `GitHub`_
|
|
|
|
ObjectCollection.php
|
|
|
|
.. literalinclude:: ObjectCollection.php
|
|
:language: php
|
|
:linenos:
|
|
|
|
ComparatorInterface.php
|
|
|
|
.. literalinclude:: ComparatorInterface.php
|
|
:language: php
|
|
:linenos:
|
|
|
|
DateComparator.php
|
|
|
|
.. literalinclude:: DateComparator.php
|
|
:language: php
|
|
:linenos:
|
|
|
|
IdComparator.php
|
|
|
|
.. literalinclude:: IdComparator.php
|
|
:language: php
|
|
:linenos:
|
|
|
|
Test
|
|
----
|
|
|
|
Tests/StrategyTest.php
|
|
|
|
.. literalinclude:: Tests/StrategyTest.php
|
|
:language: php
|
|
:linenos:
|
|
|
|
.. _`GitHub`: https://github.com/domnikl/DesignPatternsPHP/tree/master/Behavioral/Strategy
|
|
.. __: http://en.wikipedia.org/wiki/Strategy_pattern |