A TypeSymbol instance represents a type variable<http://docjar.org/docs/api/com/sun/tools/javac/code/Symbol$TypeSymbol.html>. The RequestFactory annotation processor looks at the type parameters of the Request or InstanceRequest to find the return type of the domain method, and it assumes it's a "class"<http://code.google.com/p/google-web-toolkit/source/browse/trunk/user/src/com/google/web/bindery/requestfactory/apt/RequestContextScanner.java#61> .
Here, the problem is your "P" in InstanceRequest<P, Void>. Probably related: http://code.google.com/p/google-web-toolkit/issues/detail?id=6794 -- 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/-/u7BhwN7VgsAJ. 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.