1 Reply Latest reply on Oct 7, 2005 3:05 PM by Emmanuel Bernard

    Blocking deletion of the referred objects

    Eugene Onischenko Newbie

      I have a bean which is referred by many other beans.

      @Entity
      public class BeanA {
      .....
      }
      
      
      @Entity
      public class BeanB {
       @ManyToOne
       private BeanA beana;
      }
      
      public class BeanC {
       @ManyToOne
       private BeanA beana;
      }
      


      I want to block deletion of the BeanA objects if there is at least one reference to the object. And if there is a reference, the exception with human readable text shold be thrown (e.g. Cannot delete the object beacaure BeanC refers it).

      It's possible to define @PreRemove method in BeanA, obtain EntityManager and execute many search queries. But this solution is too complex.

      Is there any built in ejb3 functionality, which can help to solve this issue?