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Copy pathProxyPattern.php
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67 lines (58 loc) · 1.1 KB
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<?php
/**
* This is proxy pattern of design pattern
* 代理模式是一种结构型模式,它可以为其他对象提供一种代理以控制对这个对象的访问
*
* @author hkf <[email protected]>
* @version 0.1.0
*/
/**
* Class Subject
* 抽象主题角色,定义统一的接口
*/
abstract class Subject
{
abstract public function action();
}
/**
* Class RealSubject
* 真实主题角色
*/
class RealSubject extends Subject
{
public function __construct()
{
}
public function action()
{
}
}
/**
* Class ProxySubject
* 代理主题角色
*/
class ProxySubject extends Subject
{
private $_real_subject = NULL;
public function __construct()
{
}
public function action()
{
$this->_beforeAction();
if (is_null($this->_real_subject)) {
$this->_real_subject = new RealSubject();
}
$this->_real_subject->action();
$this->_afterAction();
}
private function _beforeAction()
{
}
private function _afterAction()
{
}
}
// client
$subject = new ProxySubject();
$subject->action();