ClassCastException in TypeResolver (ResolvedRecursiveType cannot be cast to ResolvedObjectType)

[deki]

I'm using hibernate validator for bean validation. During the ddl generation a ClassCastException is thrown:

java.lang.ClassCastException: com.fasterxml.classmate.types.ResolvedRecursiveType cannot be cast to com.fasterxml.classmate.types.ResolvedObjectType
at com.fasterxml.classmate.TypeResolver._resolveSuperClass(TypeResolver.java:422)
at com.fasterxml.classmate.TypeResolver._constructType(TypeResolver.java:395)
at com.fasterxml.classmate.TypeResolver._fromClass(TypeResolver.java:351)
at com.fasterxml.classmate.TypeResolver._fromAny(TypeResolver.java:299)
at com.fasterxml.classmate.TypeResolver._fromParamType(TypeResolver.java:437)
at com.fasterxml.classmate.TypeResolver._fromAny(TypeResolver.java:305)
at com.fasterxml.classmate.TypeResolver._resolveSuperInterfaces(TypeResolver.java:409)
at com.fasterxml.classmate.TypeResolver._constructType(TypeResolver.java:395)
at com.fasterxml.classmate.TypeResolver._fromClass(TypeResolver.java:351)
at com.fasterxml.classmate.TypeResolver.resolve(TypeResolver.java:111)
at org.hibernate.validator.internal.util.ReflectionHelper.parametersResolveToSameTypes(ReflectionHelper.java:755)

[cowtowncoder]

Ok this seems possible theoretically (and given that you hit it, now in practice...). But while fix may be simple to do (cast may not be necessary) I would need a test case to verify that the problem would be completely resolved.

Would it be possible to get a code snippet or test to reproduce this problem?

[deki]

I'm not using the classmate library directly, so it's difficult for me to create a testcase. I tried to create a simple Maven project with hibernate-maven-plugin that reproduces the issue but didn't succeed yet.

[cowtowncoder]

Ok. I hope we can eventually reproduce it, so that it will be possible to come up with fix & verification.

[cheister]

We're also seeing this error when trying to update from Hibernate Validator 4.3.1 to 5.1.2. The following test will reproduce the error:

public static void main(String[] args) {
    TypeResolver resolver = new TypeResolver();
    resolver.resolve(Bar.class);
}

private static class Foo extends Bar { }

private static class Bar extends Zen<Bar, Foo> { }

private static class Zen<A, B extends A>  { }

[cowtowncoder]

@cheister thank you. That certainly is simple enough to reproduce.

[cowtowncoder]

Fixed, will be in 1.1.0 release which is being released at this point.

[cheister]

Thanks for the quick turnaround on the fix!

[cowtowncoder]

No problem, thank you for providing the test. For a while I worried it might be complicated thing to fix, but in the end things worked out reasonably well I think.

1.1.0 should be available from Maven Central now.