PHPAdapter patternObjectAdaptation code analysis
<?php // 适配器模式-对象适配 /** * 需要被适配的类 * 需求:给 Source 新增一个新的方法但又不修改 Source 的源代码 */ class Source { public function action() { echo 'call action', '<br/>'; } } interface Targetable { /** * Source 类中同名的方法, * 适配器中不需要使用的方法可以不在此接口中定义 */ function action(); /** * 需要给 Source 类新增的方法 */ function action2(); } /** * 适配器类 * 相对于 类适配 更加灵活 */ class Adapter implements Targetable { /** * 不是继承 Source 类, 而是持有 Source 类的实例 */ private $sou = null; public function construct(Source $s) { $this->sou = $s; } public function action() { $this->sou->action(); } public function action2() { echo 'call <b>action2</b>', '<br/>'; } } // test code $s = new Source(); $ad = new Adapter($s); $ad->action(); $ad->action2();
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