Javascript 面向对象编程使用接口的方法

var Interface = function(interfaceName,interfaceMethods){
	if(arguments.length!=2){
		alert("Interface expected  2 arguments,one is for Interface Name, and the other is the Array for methods ")
	}
	
	this.interfaceName = interfaceName;
	this.interfaceMethods = new Array();
	for(var i = 0;i < interfaceMethods.length;i++){
		if(typeof interfaceMethods[i] !== "string"){
			alert("Interface constructor expects each method name to be passed in as a string");   
			break;
		}
		this.interfaceMethods.push(interfaceMethods[i])
	}
}

Interface.CheckImplements = function(object,interfaces){
	if(arguments.length!=2){
		alert("Interface expected  2 arguments,one is for Interface Name, and the other is the Array for methods ")
	}

	for(var i=0;i,i<interfaces.length;i++){
		//alert(interfaces[i])
		if(interfaces[i].constructor !== Interface){
			alert("the interface expects to be created from Interface")
			break;
		}
		var interface = interfaces[i];
		for(var j=0;j<interface.interfaceMethods.length;j++){
			method = interface.interfaceMethods[j];
			if(!object[method]||(typeof object[method]!="function")){
				alert("object for the method '"+method+ " ' is not found for Interface '"+ interface.interfaceName+ " '")
				break;
			}
		}
	}
}

var PersonInterface = new Interface("PersonInterface",["display","walk","eat","shout"])  //定义一个接口

var Person = function(){
	
	this.display = function(){
		
	}

	this.eat = function(){
		
	}

	this.shout = function(){
		
	}
}
 person = new Person();
 Interface.CheckImplements(person,[PersonInterface]) 
//会弹出对话框object for the method 'walk ' is not found for Interface 'PersonInterface '

//注明，这似乎要在Person对象被创建后才能检测，这相当于后绑定，用一个函数来检测，这似似乎是一个缺陷，如何使用早期绑定，这正是要研究的一个题目。