linechat中解析dataProvider对象数据

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
	layout="absolute" creationComplete="init()">
	<mx:LinearAxis >
		
	</mx:LinearAxis>
	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.charts.chartClasses.Series;
			import mx.charts.chartClasses.IAxis;
			import lineChat.Line;
			import mx.collections.ArrayCollection;
			[Bindable]
			private var array:ArrayCollection=new ArrayCollection;
			private function init():void{
				for(var i:int=0;i<10;i++){
					var line:Line=new Line;
					line.x=i;
					line.y=i;
					array.addItem(line);
				}
				mx.controls.Alert.show("init");
				
			
			}
			
			
//			private function labelfunction(labelValue:Object, previousValue:Object, axis:IAxis):String 
//			{ 
//				
//				return 
//			 }
			 
			 public function myDataFunction(series:Series, item:Object, fieldName:String):Object {
        	//	mx.controls.Alert.show("asdfas");
        		  if(fieldName == 'yValue')
            		  return(item.x);
         		 else if(fieldName == "xValue")
         		     return(item.y);
        		  else
          		    return null;
   			  }     


		]]>
	</mx:Script>
	<mx:LineChart dataProvider="{array}" id="linechart" showDataTips="true">
		  

		<mx:series>
			<mx:LineSeries>
				<mx:dataFunction>
					myDataFunction
				</mx:dataFunction>
			</mx:LineSeries>
		</mx:series>
	</mx:LineChart>
	
</mx:Application>