每日一模式之php的适配器模式

/*** 适配器模式 :将某一个对象的接口适配为另外一个 */interface seller{	public function sell();} //场景：中草药，直接买，特别处理后卖掉class herbalmedicine {	private $_medicine,$_pick_date,$_keep_time;	public function __construct($medicine){		$this->_medicine = $medicine;	}	public function getmedicne(){		return $this->_medicine;	}	//and so on}//直接出售class redictmedicineseller implements seller{	private $_medicine;	public function __construct($medicine_obj){		$this->_medicine = $medicine_obj;	}	public function sell(){		echo $this->_medicine->getmedicne()." redict sell \n";	}}$herbarl_obj = new herbalmedicine("中草药");$redict_obj = new redictmedicineseller($herbarl_obj);$redict_obj->sell();//提取这个动作可能不仅仅是extractmedicineseller 用到//不能用extractmedicineseller 的方法代替提取class herbalmedicineadapter extends herbalmedicine{	public function __construct($medicine){		parent::__construct($medicine);		$this->extract($medicine);	}	public function extract(){		echo "extract medicine \n";	}}//比如提取出青蒿素处理后出售class  extractmedicineseller  implements seller{	private $_medicine;	public function __construct($medicine_obj){		$this->_medicine = $medicine_obj;	}	public function sell(){		echo $this->_medicine->getmedicne()." extract sell \n";	}}$herbarl_adapter_obj = new herbalmedicineadapter("中草药");$extract_obj = new extractmedicineseller($herbarl_adapter_obj);$extract_obj->sell();//适配器模式说的是同源，处理后适用不同的对象//如果不做适配处理可能会影响以前的功能，或者会任意添加方法，类的功能不再单一，不方便以后的扩张