Hi,

While trying to invoke the method validator using an interceptor, am getting the ValidationException during unwrap method call.
The project setup includes GWT, Guice, Hibernate Validator 4.2, validation API 1.0. The validation is being invoked at GWT server layer.

Same error occured while trying to get an ExecutableValidator instance using hibernate Validator 5.1 and validation API 1.1.

javax.validation.ValidationException: Type interface org.hibernate.validator.method.MethodValidator not supported
at org.hibernate.validator.engine.ValidatorImpl.unwrap(ValidatorImpl.java:157
at com.validation.demo.ValidationInterceptor.invoke(ValidationInterceptor.java:32)

Any idea why the bean validation provider implementaion is not being recognised?

Thanks.

In HV 5 there is no need for unwrapping the validator, as method validation is part of the BV API. Just invoke validator#forExecutables().

--Gunnar

Hi Gunnar,

Thanks for the quick reply.

Using validator#forExecutables() was my first choice, but somehow the validator#forExecutables() method was not visible on the validator. So had to go for unwrap.

What could be wrong if I am not able to see forExecutables() on the validator instance. I tried using

Validation.buildDefaultValidatorFactory().getValidator().forExecutables()
even tried, Validation.byProvider(HibernateValidator.class).configure().buildValidatorFactory().getValidator().forExecutables()
but no success.

Thanks,
Gautam

Hi Gunnar,

I think The Validator interface is referring to the validation API 1.0 jar version packaged with the GWT SDK and hence not finding the new methods.

How can we make it work with GWT which has older validation API?

Thanks

The validation feature of GWT 2.5 is based on Hibernate Validator 4.1.0 (as per https://developers.google.com/web-toolkit/doc/latest/DevGuideValidation) which doesn't support method validation and thus the unwrap() method always throws an exception (see https://github.com/hibernate/hibernate-validator/blob/4.1.0.Final/hibernate-validator/src/main/java/org/hibernate/validator/engine/ValidatorImpl.java).

So I think as it stands there is no way to make use of method validation on the client side. Of course you could use a newer HV version to perform method validation on the server side.

--Gunnar

Thanks Gunnar...