From: <glassfish_at_javadesktop.org>
Date: Tue, 06 Nov 2007 15:44:53 PST

Any entity must have an id according to the JPA spec. This covers your case #1.
As the spec doesn't cover mpping two properties to the same column, the case #2 becomes a Hibernate specific approach. Did you ask this question on the Hibernate forum?

thanks,
-marina
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