The problem is that i don`t want to map whole classes, Commons and QuestionType, not only some properties. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100196#4100196 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4100196