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Many facilities from RESTEasy 2 appear in a different form in RESTEasy 3. For example, much of the client framework in RESTEasy 2 is formalized, in modified form, in JAX-RS 2.0. RESTEasy versions 3.0.x implement both the older deprecated form and the newer conformant form. The deprecated form is moved to legacy module in RESTEasy 3.1 and finally removed in RESTEasy 4. For more information on upgrading from various deprecated facilities in RESTEasy 2, see http://docs.jboss.org/resteasy/docs/resteasy-upgrade-guide-en-US.pdf
javax.validation.ConstraintDefinitionException,javax.validation.ConstraintDeclarationException, orjavax.validation.GroupDefinitionException,
they were wrapped in a
org.jboss.resteasy.api.validation.Resteasy.ResteasyViolationException,
which org.jboss.resteasy.api.validation.ResteasyViolationExceptionMapper,
the built-in implementation of
javax.ws.rs.ext.ExceptionMapper<javax.validation.ValidationException>,
then turned into descriptive text.
As of release 4.0.0, instances of ConstraintDefinitionException, etc., are thrown as is.
They are still caught by ResteasyViolationExceptionMapper, so, in general, there is
no detectable change. It should be noted, however, that an implementation of
ExceptionMapper<ResteasyViolationException>, which, prior to release
4.0.0, would have caught wrapped instances of ConstraintDefinitionException,
will not catch unwrapped instances.