Thanks for pointing to this issue Thomas!

A follow up question: how do we distinguish between the sub-classes on
the client?

JPA queries are polymorphic, so on the server the sub-classes are
distinguishable.
For single table and joint inheritance strategy JPA internally uses a
discriminator column.  The discriminator column could be used to
distinguish between sub-classes, but the problem is it is not
accessible even on the server side.

Thanks a lot for your help!

On Jan 4, 10:02 am, Thomas Broyer <[email protected]> wrote:
> It's not a "bug", it's the way RF works (for now): there's no polymorphism
> on the client-side, you get objects of the exact type declared in your
> service stub or proxy (EntityProxy/ValueProxy) interfaces.
> See alsohttp://code.google.com/p/google-web-toolkit/issues/detail?id=5367

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