[jboss-user] [EJB 3.0] - Advanced trigger mechanism for Entities

[wark2007]

I am looking for a "trigger" implementation (similar to database trigger) for entity beans. I had  a look on the EventListener and they are quite good in many cases but they have one huge disadvantage - they don't give me access to the old object, since only the current object is passed to the @PreUpdate/@PostUpdate methods.


Is there any way to get also the old value in JPA or in the JBoss implementation, something like:


  | @PreUpdate
  | void preUpdate(EntityClass new, EntityClass old) {
  |   if (new.foo != old.foo) {
  |    
  |   }
  | }
  | 

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