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Posted to dev@cayenne.apache.org by "Andrus Adamchik (JIRA)" <ca...@incubator.apache.org> on 2006/09/25 04:16:48 UTC

[JIRA] Created: (CAY-669) Support superclass entity callbacks

Support superclass entity callbacks
-----------------------------------

         Key: CAY-669
         URL: http://issues.apache.org/cayenne/browse/CAY-669
     Project: Cayenne
        Type: Task

  Components: Cayenne Core Library  
    Versions: 3.0    
    Reporter: Andrus Adamchik
 Assigned to: Andrus Adamchik 
     Fix For: 3.0


We need an ability to define a callback method in a common superclass of some entities and register it just once:

LifecycleEventCallbackMap prePersist = ...
prePersist.addListener(MySuper.class, "prePersist");

Then individual entities may choose to override this method if they want to customize the behavior of callback. Or they may implicitly rely on the superclass. JPA supports that as "listeners on mapped superclass". Cayenne doesn't have a formal notion of a mapped superclass (abstract entity would be the closest), and we can simply support it on any superclass that is registered explicitly.

(also note that JPA supports "excludes superclass" flag ... not sure if it is applicable here, as the registration is explicit.

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