Suhridk at 21:07, 13 June 2012

2012-06-13T21:07:01Z

Suhridk at 21:06, 13 June 2012

2012-06-13T21:06:09Z

Suhridk: Created page with "* Strategy lets the algorithm vary independently from the clients that use it. * For e.g. let's say we have a base class that has defined a method called sort. * Now many subcla..."

2012-06-13T20:56:13Z

Created page with "* Strategy lets the algorithm vary independently from the clients that use it. * For e.g. let's say we have a base class that has defined a method called sort. * Now many subcla..."

New page

* Strategy lets the algorithm vary independently from the clients that use it.
* For e.g. let's say we have a base class that has defined a method called sort.
* Now many subclasses inherit from it. Probably not all the subclasses are sortable, so it may not make sense to add sort() in the base class.
* Alternatively an interface called sortable can be defined, and only sortable subclasses can implement the interface.
* The disadvantage with this is every time sort algorithm needs to change, all the base classes that are sortable need to change - maintenance headache.
* A solution is to encapsulate the sort algorithm into a separate interface and concrete classes.

<syntaxhighlight lang="java5">

interface SortAlgo {
public void sort();
}

class QuickSort implements SortAlgo {
public void sort() {
//....
}
}

class BubbleSort implements SortAlgo {
public void sort() {
//....
}
}

class Base {
SortAlgo sortAlgo;

public void doSort() {
sortAlgo.sort();
}

}

class Sub extends Base {
public Sub() {
sortAlgo = new QuickSort();
}

}

</syntaxhighlight>

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	* Another example from Wikipedia:		* Another example from Wikipedia:

−	http://en.~~wikipedia~~.org/~~wiki~~/~~File:~~StrategyPattern_IBrakeBehavior.svg	+	http://upload.wikimedia.org/wikipedia/commons/4/4b/StrategyPattern_IBrakeBehavior.svg

← Older revision		Revision as of 21:06, 13 June 2012
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	</syntaxhighlight>		</syntaxhighlight>
		+
		+	* Another example from Wikipedia:
		+
		+	http://en.wikipedia.org/wiki/File:StrategyPattern_IBrakeBehavior.svg

Strategy Pattern - Revision history

Suhridk at 21:07, 13 June 2012

Suhridk at 21:06, 13 June 2012

Suhridk: Created page with "* Strategy lets the algorithm vary independently from the clients that use it. * For e.g. let's say we have a base class that has defined a method called sort. * Now many subcla..."