<?php
/**
* 外观模式 示例
*
* 为子系统中的一组接口提供一个一致的界面,定义一个高层接口,使得这一子系统更加的容易使用
*/
class SubSytem1
{
public function Method1()
{
echo "subsystem1 method1<br/>";
}
}

class SubSytem2
{
public function Method2()
{
echo "subsystem2 method2<br/>";
}
}

class SubSytem3
{
public function Method3()
{
echo "subsystem3 method3<br/>";
}
}

class Facade
{
private $_object1 = null;
private $_object2 = null;
private $_object3 = null;

public function __construct()
{
$this->_object1 = new SubSytem1();
$this->_object2 = new SubSytem2();
$this->_object3 = new SubSytem3();
}

public function MethodA() {
echo "Facade MethodA<br/>";
$this->_object1->Method1();
$this->_object2->Method2();
}

public function MethodB() {
echo "Facade MethodB<br/>";
$this->_object2->Method2();
$this->_object3->Method3();
}
}

// 实例化
$objFacade = new Facade();

$objFacade->MethodA();
$objFacade->MethodB();