//定义一个静态方法来实现接口与实现类的直接检验
//静态方法不要写出Interface.prototype ,因为这是写到接口的原型链上的
//我们要把静态的函数直接写到类层次上
//定义一个接口类
var Interface=function (name,methods) {//name：接口名字
  if(arguments.length<2){
    alert("必须是两个参数")
  }
  this.name=name;
  this.methods=[];//定义一个空数组装载函数名
  for(var i=0;i<methods.length;i++){
    if(typeof methods[i]!="string"){
      alert("函数名必须是字符串类型");
    }else {
      this.methods.push( methods[i]);
    }
  }
};
Interface.ensureImplement=function (object) {
  if(arguments.length<2){
    throw new Error("参数必须不少于2个")
    return false;
  }
  for(var i=1;i<arguments.length;i++){
    var inter=arguments[i];
    //如果是接口就必须是Interface类型
    if(inter.constructor!=Interface){
      throw new Error("如果是接口类的话，就必须是Interface类型");
    }
    //判断接口中的方法是否全部实现
    //遍历函数集合
    for(var j=0;j<inter.methods.length;j++){
      var method=inter.methods[j];//接口中所有函数

      //object[method]传入的函数
      //最终是判断传入的函数是否与接口中所用函数匹配
      if(!object[method]||typeof object[method]!="function" ){//实现类中必须有方法名字与接口中所用方法名相同
        throw new Error("实现类中没有完全实现接口中的所有方法")
      }
    }
  }
}

var composite=new Interface("composite",["getChildByName","add"]);//侧重点获取子
var student=new Interface("composite",["goToClass","finishClass"]);//侧重点为每个对象的实现

 var compositeObj=function (name) {
         this.name=name;
         this.type="com";//默认是组合类
         var childs=new Array();
        //得到相关的所有孩子节点
         this.getChildByName=function (name) {
           //涉及到递归
           var toChilds=new Array();
           if(!name){
             for(var i=0;i<childs.length;i++){
                if(childs[i].type=="com"){
                  toChilds=toChilds.concat(childs[i].getChildByName())
                }else {
                  toChilds.push(childs[i]);
                }
             }
           }else {
             for (var i = 0; i < childs.length; i++){
               if(childs[i].name==name){
                 if(childs[i].type=="com"){
                   toChilds=toChilds.concat(childs[i].getChildByName());
                   break;
                 }else {
                   toChilds.push(childs[i]);
                   break;
                 }
               }else {
                 if(childs[i].type == "com"){
                   toChilds =toChilds.concat(childs[i].getChildByName(name));
                 }
               }
             }
               }
               return toChilds;
         };
         //增加子节点
         this.add=function (child) {
           childs.push(child);
           return this;
         };
         //去上课
        this.goToClass=function (name) {
        var toChilds=this.getChildByName(name);
         for(var i=0;i<toChilds.length;i++){
              toChilds[i].goToClass();
         }
      };
          //下课
         this.finishClass=function (name) {
      var toChilds=this.getChildByName(name);
      for(var i=0;i<toChilds.length;i++){
        toChilds[i].finishClass();
      }
    };
    Interface.ensureImplement(this,composite,student);
    };

  var studentObj=function (name) {
    this.name=name;
    this.type="student";//默认是叶子
    //得到所有孩子节点
   this.getChildByName=function (name) {
     if(this.name==name){
       return this;
     }else {
       return null;
     }
   }
   //增加子节点
    this.add=function (child) {
      throw new Error("add 不成被初始化(在叶子了中)")
    }
    //去上课
    this.goToClass = function(name){
      document.write(this.name +" 去上课<br>");
    }
    //下课
    this.finishClass = function(name){
      document.write(this.name +" 下课<br>");
    }
    Interface.ensureImplement(this,composite,student);
  }

 var astudent=new studentObj("我是a同学");
  var bstudent=new studentObj("我是b同学");
  var cstudent=new studentObj("我是c同学");
  var dstudent=new studentObj("我是d同学");
  var estudent=new studentObj("我是e同学");
  var fstudent=new studentObj("我是f同学");
  var gstudent=new studentObj("我是g同学");
  var hstudent=new studentObj("我是h同学");
  var istudent=new studentObj("我是i同学");

  var one = new compositeObj("一班");
  var oneOne = new compositeObj("一班一组");
  oneOne.add(astudent).add(bstudent);
  var oneTwo = new compositeObj("一班二组");
  oneTwo.add(cstudent).add(dstudent);

  one.add(oneOne).add(oneTwo);
  var two = new compositeObj("二班");
  var twoOne = new compositeObj("二班一组");
  twoOne.add(estudent).add(fstudent);
  var twoTwo = new compositeObj("二班二组");
  twoTwo.add(gstudent).add(hstudent).add(istudent)
  two.add(twoOne).add(twoTwo);
  var usPcat = new compositeObj("组合设计模式培训学校");
  usPcat.add(one).add(two);

usPcat.goToClass();
document.write("-------------------------<br>");
usPcat.goToClass("一班");
document.write("-------------------------<br>");
usPcat.goToClass("二班一组");