I want to change some properties from entity listener from methods anotated as @PrePersist and @PreUpdate.

@PrePersist
public void setCreationTime( Object obj ) {
 ((obj)MyEntity).setCreationTime( System.currentTimeMillis() );
}

The method is called, but property not changed. No error messages.
Is it bug?

I'm using JBoss4.0.2 and EJB3 preview 5