CloneFactory.as

package components {
	import flash.utils.describeType;
	import flash.utils.getDefinitionByName;
	
	import mx.core.IFactory;
	import mx.core.UIComponent;
	import mx.events.FlexEvent;
	import mx.utils.ObjectUtil;

	public class CloneFactory implements IFactory{
		private var base:*;
		private var init:Function
		public function CloneFactory(base:UIComponent, init:Function = null) {
			this.base = base;
			this.init = init
		}

		public function newInstance(){
			var r:* = clone(this.base);
			if (init != null){
				var bind:Function = function(site:Object, property:String, src:String = null):void{
					r.addEventListener(FlexEvent.DATA_CHANGE, function(e:FlexEvent):void{
						if(e.target.toString().split(/\./).pop() == "hiddenItem") return;
						var value:* = (src) ? r.data[src] : r.data.toString();
						site[property] = value;
					})		
				}
				init({"target":r, "bind":bind})
			} 
			return r;
		}
		
		public function clone(obj:*):*{
			var className:String = describeType(obj).attribute("name").toString()
			var klass:Class = Class(getDefinitionByName(className))
			var r:*  = new klass()
					
			if(obj.hasOwnProperty("getChildren")){
				obj.getChildren().forEach(function(x:*, i:int, a:Array):void{
					r.addChild( clone(x) )
				})
			}else{
				for(var p:String in ObjectUtil.copy(obj)){
					var old:* = r[p]
					if(obj[p] == null) continue
					if(old != obj[p]) r[p] = obj[p]					
				}
			}
			
			return r
		}		
		
	}
}