How to handle LOV Event in OAF

if(pageContext.isLovEvent()) 

      { 

      String lovInputSourceId = pageContext.getLovInputSourceId(); 

    

     //IdLov is the id of LOV item

         if("IdLov".equals(lovInputSourceId)) { 

           System.out.println("Inside isLovEvent of IdLov"); 

       } 

      }