JavaScript之原生接口类设计

//接口类

var Interface = function(name , methods){

if(arguments.length!=2){

throw new Error('Arguments length is not qualified!');

}

this.name = name;//接口名称

this.methods = []; //空数组存放方法名

for (var i = 0 , length = arguments.length; i < length; i++) {

if(typeof(methods[i]) != 'string'){

throw new Error("Method name\'s type must be 'string'!");

}

this.methods.push(methods[i]);

}

return this;

};

//公有共享方法：检测实例的接口是否均实现了

Interface.ensureImplements = function(object){//类对象实例

if(arguments.length<2){

throw new Error("This instance doesn't implements any one interface!");

}

//获得接口对象实例

for(var i = 1 , length = arguments.length; i < length ; i++){

var instanceInterface = arguments[i];

if(instanceInterface.constructor !== Interface){

throw new Error("This instanceInterface is not interface!");

}

for(var j = 0 ; j < instanceInterface.methods.length; j++){

var methodName = instanceInterface.methods[j];

if(!object[methodName] || typeof(object[methodName]) !== 'function'){

throw new Error("This instanceInterface doesn't exist the instanceInterface's method!");

}

}

}

}

//测试接口对象的实例

var CarInterface = new Interface('CarInterface',['start','run']);