From Jesper:
Currently we are using

org.jboss.jca.deployers.common.validator.ValidateObject

as the holder class for the object that needs to be validated.
Probably a better option would be to create a

org.jboss.jca.deployers.common.validator.ValidateClass

This is especially useful for the standalone configuration as we don't have to create the object instances, but just pass the class definition.