JSR 303 - Composition Constraint?

I don't have the info in front of me, but I remember reading something about validators that are composed of other validators. So if you have two validators A and B. You can define a third 'C' which is composed of the other two.

Hunt through the doco, you should find it.

After further research, it appears that there is no known solution to obtain a ConstraintValidator instance for a given constraint, portable or not. A helper class seems to be the only way to do this.

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