The Bean Validation API allows the set of validators for a given constraint to be specified/overridden using XML constraint mapping files (http://docs.jboss.org/hibernate/stable/validator/reference/en/html_single/#d0e1957).
Right now the annotation processor does not process any XML configuration files at all (neither validation.xml nor mapping files).
While it seems ok for now that the AP does not check constraint declarations given in XML (after all it's an annotation processor), I think it should evaluate the constraint definitions and the validators configured in XML. Otherwise the AP would raise false errors (as validators added in XML are ignored) or would give false positives (as validators given in @Constraint#validatedBy could be removed by "include-existing-validator='false'").
Do you have any plans for implementing this?
No, not really at this point. Do you think, we should do it for 4.2? Another issue in this context is HV-418, at least this one should ship with 4.2
It would be nice if we could get it into 4.2, but not essential imo. seems more important and hopefully not so hard to fix.
I move it into the 4.2.0 final release. If we don't have time for it we move it out later.
Ok, let's start with HV-418. Another story is checking method level constraints with the AP, I'll create another JIRA issue for this, but this definitely can be done in 4.3