php设计模式 Delegation (委托模式)
25种php设计模式,你全都知道吗?下面用代码介绍委托模式(Delegation模式)
<?php /** * 委托模式 示例 * * @create_date: 2010-01-04 */ class PlayList { var $_songs = array(); var $_object = null; function PlayList($type) { $object = $type."PlayListDelegation"; $this->_object = new $object(); } function addSong($location,$title) { $this->_songs[] = array("location"=>$location,"title"=>$title); } function getPlayList() { return $this->_object->getPlayList($this->_songs); } } class mp3PlayListDelegation { function getPlayList($songs) { $aResult = array(); foreach($songs as $key=>$item) { $path = pathinfo($item['location']); if(strtolower($item['extension']) == "mp3") { $aResult[] = $item; } } return $aResult; } } class rmvbPlayListDelegation { function getPlayList($songs) { $aResult = array(); foreach($songs as $key=>$item) { $path = pathinfo($item['location']); if(strtolower($item['extension']) == "rmvb") { $aResult[] = $item; } } return $aResult; } } $oMP3PlayList = new PlayList("mp3"); $oMP3PlayList->getPlayList(); $oRMVBPlayList = new PlayList("rmvb"); $oRMVBPlayList->getPlayList();
其他相关设计模式:
备忘录模式(Memento模式)
观察者模式(Observer模式)
模板方法模式(Template Method模式)
命令模式(command模式)
组合模式(composite模式)
享元模式(flyweight模式)
策略模式(strategy模式)
状态模式(state模式)
适配器模式(adapter模式)
工厂模式(factory模式)
原型模式(prototype模式)
外观模式(facade模式)
单例模式(singleton模式)
桥梁模式(bridge模式)
装饰模式(decorator模式)
抽象工厂模式(abstract factory模式)
建造者模式(Builder模式)
访问者模式(Visitor模式)
解释器模式(Interpreter模式)
中介者模式(Mediator模式)
职责链模式(Chain Of Responsibility模式)
代理模式(Proxy模式)
迭代器模式(Interator模式)
数据访问对象模式(DAO模式)
委托模式(Delegation模式)
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