Hi, In Hibernate Validator, we have a TraversableResolver which avoids to validate the uninitialized properties of an entity. This is done in https://github.com/hibernate/hibernate-validator/blob/master/engine/src/m... and, as you can see, we execute Persistence.getPersistenceUtil().isLoaded( traversableObject, traversableProperty.getName() ) even if the traversableObject has nothing to do with Hibernate ORM. I'm looking for an API that could tell me if an object is a class potentially managed by ORM (be it an entity, an embeddable or whatever: any class potentially containing a lazy field). I was thinking that maybe injecting an EntityManagerFactory (it would require CDI though) and using the Metamodel could somehow work... but the PersistenceUtil API we currently use is capable of dealing with several persistence providers and I don't think the injected EntityManagerFactory approach will fly in this case. Is there something I could use to do that, that would be portable and cover the cases currently (somehow) taken care of? Any ideas welcome. Thanks! -- Guillaume