Unable to Cast a Object into Typed Class

Hi, I am not able to cast a simple object in typed class.
I have a class ItemVO.as
package
    public class ItemVO
        public var idData:String;
        public var valData:String;
In application on some action
            var obj:Object = new Object;
            obj['idData']="001";
            obj['valData']="abhinav";
            try{
                var itemVO:ItemVO=ItemVO(obj);
            }catch(e:Error)
                Alert.show(e.message);
I am getting below error at var itemVO:ItemVO=ItemVO(obj)
Error #1034: Type Coercion failed: cannot convert Object@b5c3ad9 to ItemVO.
Where I am doing wrong??
Please help.
Thanks.
Abhinav

You need to do it by hand.
Or make ItemVO able to take an object as constructor argument. Which is again doing it by hand.
public function ItemVO(obj:Object)
idData = obj.idData;
valData = obj.valData;
C

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