[bv-dev] Distinguishing cross-parameter and generic constraints

[Emmanuel Bernard]

On Mon 2013-01-21 11:52, Matt Benson wrote:
> > ## Thoughts
> >
> > I think I like @CrossParametersConstraints more than @Constraint for
> > both as it makes things explicit and keep the simple use case as is.
> >
> > But I am intrigued by the @Validates option. In many ways, it's similar
> > to how we resolve the right constraint validator based on the type. The
> > only difference is that the @Validates annotation refines how Object[]
> > should be interpreted. It "fits better" in my opinion.
> >
> > My concern around the latest option is that it forces us to be a
> > subclass of ConstraintViolation for the foreseeable future including
> > when we reopen the type-safe options we explored in
> > http://beanvalidation.org/proposals/BVAL-232/
> >
> > Thoughts and comments?
> >
> >
> So you're saying @Validates would eliminate the need for a separate
> CrossParameterConstraintValidator interface?  FWIW, it seems to me that the
> separate interface just feels more straightforward.
> 

It would eliminate the need for a separate @CrossParametersConstraint
annotation. There is no CrossParameterConstraintValidator interface
in the current proposals. We explored that briefly with Gunnar today too
but this approach cannot cover all cases.

Emmanuel