How can I handle validation exception?

[Νίκος Παράσχου]

Hello,

I implemented validateForSave(ValidationResult validationResult) in one
of my ObjEntities. When a specific condition is not met, a
ValidationException is thrown.

How can I handle this ValidationException?

The following doesn't work (I get: ValidationException is not thrown
anywhere inside block try{}):

try {
        mycontext.commit();
}
catch(ValidationException vex) {
        ...
}

Thank you,
Nikos