js for oo javascript again

gistfile1.js

(function (){
	/*mummy*/
	var mum = {
		types:new Array(),
		interface:function(interface_def){
			var interface_name = (new interface_def).constructor.name;
			mum.types[interface_name]= new interface_def;
		},
		/*class def*/		
		class:function(p_class){
			var constructor_name = (new p_class.$def).constructor.name;
			//static members
			if(p_class.$sta!=undefined){
				for(var member in p_class.$sta){p_class.$def[member]=p_class.$sta[member];}
			}			
			//inheritance
			if(p_class.$ext!=undefined){
				p_class.$def.prototype = new p_class.$ext;
				p_class.$def.prototype.parent = new p_class.$ext;
				p_class.$def.parent = new p_class.$ext;
			}
			//save constructor name for get instance of
			p_class.$def.prototype.getTypeName = function(){return constructor_name};
			p_class.$def.getTypeName = function(){return constructor_name};
			//interface
			if(p_class.$imp!=undefined){
				var inst = new p_class.$def;
				
				p_class.$def.prototype.interfaces = p_class.$imp;
				p_class.$def.interfaces = p_class.$imp;
				
				for(var i=0; i < p_class.$imp.length; i++){
					for(var member in p_class.$imp[i]){
						if(inst[member]!=undefined){
							if(typeof(inst[member]) != typeof(p_class.$imp[i][member]) ){
								/*implemented but bad type*/
								throw 	'Class '+constructor_name+', Interface '+p_class.$imp[i].constructor.name+
										' : bad type : '+member+
										' implemented, but '+
										typeof(inst[member])+' instead of '+
										typeof(p_class.$imp[i][member]);
							}
						}else{
							/*not implemented*/
							throw	member+' not implemented in Class '+constructor_name+
									', Interface '+p_class.$imp[i].constructor.name;
						}
					}
				}
			}//end interface
			//record new type in types list
			mum.types[constructor_name]= p_class.$def;
		},
		/*get instance of class with params*/
		select:function(class_def){
			var instance = new class_def;
			return new function(){
				this.new=function(){
					instance[instance.getTypeName()].apply(instance,arguments);/*mettre un trycatch ou faire un test*/
					//instance['getTypeName'] = function(){return this.className;}
					return	instance;
				}
			}
		}
	}/*END var mum*/
	if(!window.$class){window.$class=mum.class;}
	if(!window.$interface){window.$interface=mum.interface;}
	if(!window.$get){window.$get=mum.select;}
	if(!window.$){window.$=mum.types;}
})();