Dear Vlad,
I saw the PR to solve this, but IMO it is not sufficient. That's just a workaround to a small part of the real problem, that's metamodel classes uniqueness.

I added another test case to check for both uniqueness (by identity) and equivalence of ManagedTypes.

Actually, on 5.2.12:

• managedTypesSelfConsistenceByEquivalenceTest: pass
• managedTypesFromAttributesConsistenceByEquivalenceTest: fail
• managedTypesFromAttributesConsistenceByIdentityTest: fail
• entityTypesFromAttributesConsistenceByEquivalenceTest: pass
• entityTypesFromAttributesConsistenceByIdentityTest: pass
• embeddableTypesFromAttributesConsistenceByEquivalenceTest: fail
• embeddableTypesFromAttributesConsistenceByIdentityTest: fail

I think that for each Persistence Class (annotated with @Entity, @Embeddable, ...) there should be one (and only one) ManagedType to be retrieved from Metamodel (itself, or retrived by Attribute types).

This is true only for Entity types.

Thanks