A problem occurs when there is constraint with date/time type fields. If there is a field called "startDate" and the setter checks if it is later than today. It will be fine for user input but when I want to display an old record, data loading will fail. A work around is that to store a timestamp field, let me call it "initDate", then the setter can always check if the "startDate" is later than the "initDate". View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073730#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...