includes/excludes should extend to generated stuff

I'm working on a war project where we decided to include some mock classes on the source directory, so the developers can work on the Structs actions without worrying with the backend. As such, these classes should not be included in the 'official' war file (they are only used by the jetty6 plugin).

So, I tried to use the <excludes> configuration to exclude then but failed to do so. After struggling for a while with the -X option, google and jira, I realized such configuration only excludes files from the warSource directory (i.e, the stuff that goes in the web application root, like JSP pages). I've seen some bug entries regarding filtering resources and the includes/excludes not working a while ago, but I believe those are other issues...