Extract field name causing ConstraintViolationException

Question

How can I get field name causing org.hibernate.exception.ConstraintViolationException? The only sure way to check unique constraint is transaction commit, so even if I check it before the exception can be thrown. So I need to communicate to user witch field causing save problem.
The detailed message is more or less technical and not acceptable by user. It also depends on database driver :( IMO field name is enough, the problematic value I can get myself from object. Also other information I can prepare... but the field name.

Answer 1

can't you get the exception and the message by it's cause like this:

 try{
        t.commit();
    }catch (ConstraintViolationException e) {
        e.getCause().getMessage();//
    }

that will gave you result like this [SQL0407] Null values not allowed in column or variable GROUP00002. the last word is your column name, and you can translate it to match your field then(using static HashMap maybe).