with this class hierarchy Person <- Customer <- Employee Employee / Customer and Person are marked as @Entity. I need to know the hierarchy relation between them. Should I load the classes and build the class hierarchy, or should this be a service. I guess it does not matter a lot s I need to load the classes in this case. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171517#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...