<?php

/**
 * Description of StateDemo
 * 状态模式
 * @author jm
 */
class StateDemo
{
    //put your code here
    public static function main()
    {
        $state = new State();
        $context = new Context($state);
        $state->setValue("state1");
        $context->method();
        $state->setValue("state2");
        $context->method();

    }
}

class State {  
      
    private $_value;  
      
    public function getValue() {  
        return $this->_value;  
    }  
  
    public function setValue($value) {  
        $this->_value = $value;  
    }  
  
    public function method1(){  
        print_r("状态：".$this->_value."，执行方法".__METHOD__."\n");  
    }  
      
    public function method2(){  
        print_r("状态：".$this->_value."，执行方法".__METHOD__."\n");  
    }  
}  

  
/** 
 * 状态模式的切换类   2012-12-1 
 * @author erqing 
 *  
 */  
class Context {  
  
    /**
     *
     * @var \State
     */
    private $_state;  
  
    public function __construct($state) {  
        $this->_state = $state;  
    }  
  
    public function getState() {  
        return $this->_state;  
    }  
  
    public function setState($state) {  
        $this->_state = $state;  
    }  
  
    public function method() {  
        if ($this->_state->getValue() === "state1") {  
            $this->_state->method1();  
        } else if ($this->_state->getValue() === "state2") {  
            $this->_state->method2();  
        }  
    }  
}  

StateDemo::main();