JSR-303 custom ConstraintValidator in Spring MVC

Question

Hi! I am trying to implement a @Future validator for joda time objects.

I followed the implementation for the @Past annotation found here. So far, so good.

Now I am failing at telling spring that I have this new constraint. Is there a way to configure the Spring MVC (other than just <mvc:annotation-driven />) to tell him where the validation.xml file is? Or just to directly tell him where my new validator is?

Thanks