SAP Cloud Application Studio How to retrieve the details based on OVS in Product ID

Hi Experts,

I have small requirements in AdvanceListPanel. I have custom BO as mention below,

businessObject Demo {

               element ID : ID;

               node Sporoduct [0,n] {

                    element P_ID : ProductID;

                    element P_DES :   SHORT_Description;

                    element P_QTY : Quantity;

                    element P_NET :  Amount;   

               }

}

I have attached the OVS on Product ID (P_ID) element.

I want to auto-fill the details under the AdvanceListPanel ( Product Desc , Product Net value ( Price) ) 

1) How to get the details of Product ( Prod Descr, Product Price etc ).

Please anyone have idea about this share your thoughts.

Many Thanks,

Mithun