mass Framework class模块 v7

dom Framework的类工厂模块，方便人们设计健壮的类与层次清晰的继承体系，这对UI库的构建作用非常明显。

本版本的改进，摒弃ruby风格的include API，更名为implement，走近javaer。同时修复implement方法的一个BUG，让用户可以重写toString与valueOf这两个特殊的原型方法。

//=========================================
// 类工厂模块
//==========================================
(function(global,DOC){
    var dom = global[DOC.URL.replace(/(#.+|\W)/g,'')];
    dom.define("class", "lang",function(){
       // dom.log("已加载class模块")
        var
        P = "prototype",  C = "constructor", I = "@init",S = "_super",
        unextend = dom.oneObject([S,P, 'extend', 'implement','_class']),
        exclusive = new RegExp([S,I,C].join("|")),ron = /on([A-Z][A-Za-z]+)/,
        classOne = dom.oneObject('Object,Array,Function');
        function expand(klass,props){
            'extend,implement'.replace(dom.rword, function(name){
                var modules = props[name];
                if(classOne[dom.type(modules)]){
                    klass[name].apply(klass,[].concat(modules));
                    delete props[name];
                }
            });
            return klass
        }
        function setOptions(){
            var options = this.options = dom.Object.merge.apply(this.options || {}, arguments),key,match
            if (typeof this.bind == "function") {
                for (key in options) {
                    if ((match = key.match(ron))) {
                        this.bind(match[1].toLowerCase(), options[key]);
                        delete(options[key]);
                    }
                }
            }
            return this;
        }
        function _super(){
            var caller = arguments.callee.caller;  // 取得当前方法
            var name = caller._name;  // 取得当前方法名
            var superclass = caller._class[S];//取得当前实例的父类
            if(superclass && superclass[P][name] ){
                return superclass[P][name].apply(this, arguments.length ? arguments : caller.arguments);
            }else{
                throw name + " no super method!"
            }
        }
        dom["@class"] =  {
            inherit : function(parent,init) {
                var bridge = function() { }
                if(typeof parent == "function"){
                    for(var i in parent){//继承类成员
                        this[i] = parent[i]
                    }
                    bridge[P] = parent[P];
                    this[P] = new bridge;
                    ;//继承原型成员
                    this[S]  = parent;//指定父类
                }
                this[I] = (this[I] || []).concat();
                if(init){
                    this[I].push(init);
                }
                this.toString = function(){
                    return (init || bridge) + ""
                }
                var KP = this[P];
                KP.setOptions = setOptions;
                KP[S] = _super;//绑定方法链
                return  KP[C] = this;
            },
            implement:function(){
                var target = this[P], bridge = {},reg = exclusive;
                for(var i = 0, module; module = arguments[i++]; ){
                    if(dom.type(module,"Object")){
                        dom.mix(bridge, module);
                    }else if(typeof module === "function"){
                        dom.mix(bridge, new module);
                    }
                }
                Object.keys(bridge).forEach(function(name){
                    if(!reg.test(name)){
                        var prop = target[name] = bridge[name];
                        if(typeof prop == "function"){
                            prop._name  = name;
                            prop._class = this;
                        }
                    }
                },this);
                return this;
            },
            extend: function(){//扩展类成员
                var bridge = {}
                for(var i = 0, module; module = arguments[i++]; ){
                    dom.mix(bridge, module);
                }
                for(var key in bridge){
                    if(!unextend[key]){
                        this[key] =  bridge[key]
                    }
                }
                return this;
            }
        };
        dom.factory = function(obj){
            obj = obj || {};
            var parent  = obj.inherit //父类
            var init = obj.init ; //构造器
            delete obj.inherit;
            delete obj.init;
            var klass = function () {
                for(var i = 0 , init ; init =  klass[I][i++];){
                    init.apply(this, arguments);
                }
            };
            dom.mix(klass,dom["@class"]).inherit(parent, init);//添加更多类方法
            return expand(klass,obj).implement(obj);
        }
    });

})(this,this.document);
//2011.7.11
//dom["class"]改为dom["@class"]
//2011.7.25
//继承链与方法链被重新实现。
//在方法中调用父类的同名实例方法，由$super改为supermethod，保留父类的原型属性parent改为superclass
//2011.8.6
//在方法中调用父类的同名实例方法，由supermethod改为_super，保留父类的原型属性superclass改为_super
//重新实现方法链
//fix 子类实例不是父类的实例的bug
//2011.8.14 更改隐藏namespace,增强setOptions
//2011.10.7 include更名为implement 修复implement的BUG（能让人重写toString valueOf方法）

一些测试：




      dom.require("ready,class",function(){

        var Ancestor = dom.factory({

          init:function(name){

            this.name = name;

          },

          ancestor_prop:"3333333",

          instance_fn:function(){

            return "ancestor_instance"

          },

          instance_fn2:function(){

            return "ancestor_instance2"

          },

          extend:{

            class_fn:function(){

              return "ancestor_class";

            }

          }

        });

        var Parent = dom.factory({

          inherit:Ancestor,

          instance_fn:function(){

            return this._super()+"-->Parent";

          },

          extend:{

            class_fn:function(){

              return "parent_class";

            }

          }

        });

        var Son = dom.factory({

          inherit:Parent,

          init:function(name,age){

            this.age = age;

          },

          instance_fn2:function(){

            return this._super()+"-->Son";

          },

          instance_fn3:function(){

            return "instance_fn3"

          },

          extend:{

            class_fn:function(){

              return "son_class";

            }

          }

        });





        var p = new Parent("john");

        dom.log(p.instance_fn())

        dom.log(Parent.class_fn())

        var s = new Son("nasami", 14);

        dom.log(s.instance_fn())

        dom.log(s.instance_fn2())

        dom.log(Son.class_fn())

        dom.log(s.age)

        dom.log(s.name)

        var a = new Ancestor("时光之轮",30);

        dom.log(a.age)

        dom.log(a.name)

        dom.log(s instanceof Parent)

      });

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mass Framework class模块 v7