I have implemented interface PreUpdateEventListener and override following:

public boolean onPreUpdate(PreUpdateEvent preupdateevent) {
// TODO Auto-generated method stub
log.debug("Entering method 'onPreUpdate'");

if (preupdateevent.getEntity() instanceof PlantGroup) {
log.debug("handle 'PlantGroup' update");

}

return false;
}


Everything is working after registering event listener with spring.

Question:

How do i modify object properties before performing update?
How do i get old object properties?

Any help would be appreciated.

Thanks,
Anil G