Role-based security and widget visualization

Hello,

we are evaluating GWT as a basis for different kinds of enterprise
applications we have here. Some of those have controls which must only
be displayed for users in a certain role, also, the decision which
controls to display must be made at serverside, to avoid clientside
manipulation.

How can I implement such a requirement securely in GWT?

Should this be solved via deferred binding (that would require that
deferred binding could take the server-state into account)?

Is there a pattern for this in GWT or any extension library?

Thanks very much for your feedback!

Kai

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