Hibernate Validator - HV000151

mlaccetti · **Posted:** Tue Jun 25, 2013 2:55 pm

I have a CXF web service that is defined as an interface and the implementation as a concrete class. I'm using Hibernate Validator via an aspect to perform validation via an ExecutableValidator. This results in the above mentioned HV000151 error being thrown - "A method overriding another method must not alter the parameter constraint configuration" due to the service interface being seen as defining the method as abstract but the implementation (obviously) not. Is there any way around this, or is this a bug?

Michael

Gunnar · **Joined:** Sat Jan 24, 2009 12:46 pm **Posts:** 388

Can you post the definition if your interface and implementation methods?

The exception is raised if you add parameter constraints to a method which overrides or implements a super-type method. This behavior is mandated by the Bean Validation spec (see http://beanvalidation.org/1.1/spec/#constraintdeclarationvalidationprocess-methodlevelconstraints-inheritance) in order to obey to the Liskov substitution principle:

Quote:

In sub types (be it sub classes/interfaces or interface implementations), no parameter constraints may be declared on overridden or implemented methods, nor may parameters be marked for cascaded validation. This would pose a strengthening of preconditions to be fulfilled by the caller.

To solve the issue, add the constraints to the interface method instead of the implementation method.

--Gunnar

mlaccetti · **Posted:** Fri Jun 28, 2013 12:27 pm

Interesting - I moved the annotations from the implementation to the interface and the problem merrily went away. I feel a wee bit silly for not having tried that myself. Thanks for the information.