[rules-users] Please help

Hi All, I am using drool to validate my business objects. I have a Business object like this LineItem String ID String parentId I get 5 LineItems in a row and each line item has ID and a Parent ID, I will have to check if(parented of Any LineItem ! = ID of any LineITem) I have to show an exception, Please help me to solve this Cheers Su This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.