In Hibernate Validator we have created an extension to validate
the parameter of a method called.
The extension looks like this:
public class ValidationExtension implements Extension {
...
public <T> void processAnnotatedType(@Observes @WithAnnotations({ Constraint.class, Valid.class, ValidateOnExecution.class }) ProcessAnnotatedType<T> processAnnotatedTypeEvent) {
...
}
}
You can see the whole file on GitHub: https://github.com/hibernate/hibernate-validator/blob/master/cdi/src/main/java/org/hibernate/validator/internal/cdi/ValidationExtension.java#L219
Our current use case is the deployment of a WAR with a JSF ManagedBean that calls a StatelessBean, this are the classes in short:
Managed Bean:
@javax.faces.bean.ManagedBean(name = "greeter", eager = true)
public class Greeter {
@Inject
private StatelessBeanInterface bean;
public String getMessage() {
return bean.lookup( null );
}
}
Stateless bean interface:
public interface StatelessBeanInterface {
String lookup(@NotNull String text);
}
Stateless bean implementation:
@Stateless
public class StatelessBean implements StatelessBeanInterface {
@Override
public String lookup(String text) {
...
}
}
This commit add a test case to hibernate validator and show all the classes: https://github.com/DavideD/hibernate-validator/commit/9e86edcb87c6b1698ce64620680a1171cb713bff
The problem we are having is that the stateless bean is not validated because ValidationExtension#processAnnotatedType does not get called as expected.
Everything works fine if I apply one of the following changes:
- add @NotNull to the signature of the implementation and not the interface;
- remove the @WithAnnotations
It seems the problem is that the annotation is defined on the interface instead of the class implementing it.
Is this expected? Am I doing something wrong?
Thanks,
Davide
