Found a solution to 1): I put the validation annotations in a separate interface that is implemented by both the proxy interface (client) and the domain class (server). Since the validation annotations will automatically be passed down the inheritance hierarchy, validation works now on the client as well as on the server.
For a longer description with example see my reply to How to do client side validation with annotated rules on domain classes (RequestFactory)<http://stackoverflow.com/a/10659828/862411> . - Marco -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/tt85P2AMliIJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.