Purpose of JSR-BeanValidation in RequestFactory

I wonder if the JSR 303 bean validation at the client-server-interface is really helpful. I stumbled upon two restrictions why I decided to deactivate the validation:

• Beans created within the client might be populated in the back-end. For instance, I have a @NotNull column which contains the creationDate of an entity. It doesn't make sense to let clients set this value, instead it is set just before persisting the first time.
• Beans object graph needs to be complete for relations with cardinality 1 or 1..n. Again a @NotNull association prevents partially filled beans to be send back to the server.

Opinions?

Regards,

Stefan.

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