JPA and database error handling

Can anyone point me towards any information or discussions on methods of handling database initiated exceptions with JPA? Specifically, I'm trying to handle common data exceptions, like primary/foreign key violations etc., so I don't have to duplicate that level of data integrity checking in my business logic.
It seems I can only get hold of a RollbackException if something goes wrong. Ok, I can get into the underlying cause easily enough, but then I'm straight into implementation specific stuff (in my case, Hibernate exceptions). Are there any good techniques/patterns to reduce this dependency to an absolute minimum?

In this situation I created @Id for one of the columns or created @IdClass from all view fields.

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