Catching SQLException in CMP Entity Bean

Question

I wana catch an SQLException which is raised while updating a record in DB through a CMP Entity bean method (violating a Foriegn key constraint). It throws to the client a RemoteException which contains a RollbackException which further contains an EJBException and finally it contains the required SQLException. The containment of exceptions is like RemoteException contains RollbackException contains EJBException contains SQLException.
I know I can parse out the SQLException, but what if I wana know that which foriegn key constraint raised this excepton while updation.
I'm naive in EJB's and I hope the forum will not turn down my trivial question.
Regards
Rana

Answer 1

For example I have a table "Emplyee" having a field key "DeptID", "DeptID" is a foriegn key from table Department.
I have a user interface which can update "Employee" table and another user interface for updating "Departments" table. I can try to update employee A's "DeptID" to 3 whereas somebody else has deleted "DeptID" 3 from the "Department" table, this results in a foriegn key constraint violation at DB level. Now I wana catch this exception and report it to the client that the updation was not successful. How I can catch this exception.
The current situation is that the container throws a RemoteException. This RemoteException contains the following nested hierarchy of exceptions
RollbackException>> EJBException>> SQLException.
At client side I'm not sure which exception caused the RemoteException until and unless I can find the Deepest exception (SQLException in this case) in the nested hierarchy.
How I can write the code for handling exception as RemoteException from the container can be in the result of many other Exceptions as well.
Regards
Rana