The ConstraintValidator#initialize() contract is very limited as we only pass the annotation to it.

Passing an annotation descriptor would be better as we would add additional information to the constraint.

Passing a context specific to the initialization would also be nice as we might have to pass global objects to the initialization.

See these PR for the original requirements:

• https://github.com/hibernate/hibernate-validator/pull/861
• https://github.com/hibernate/hibernate-validator/pull/838