[jboss-user] [EJB 3.0] - Re: Merging an extended class from existing superclass
do-not-reply at jboss.com
Tue May 29 10:18:10 EDT 2007
I think there is a conceptual issue here. What you are trying is analogous to casting a Dog object to a SpottedDog object, which is bad--a Dog is not always a SpottedDog.
I suggest you remove the existing Dog object, then save the SpottedDog object.
Dog d = em.find(Dog.class, ID);
| SpottedDog sd = new SpottedDog(d);
| em.persist(sd); //you could also use em.merge(sd) here
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049360#4049360
Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4049360
More information about the jboss-user