Message Title

Jones commented on

Given the following snippet:

                              List<MyEntity> entities = query.list();

for(MyEntity entity : entities) {
  // some business logic
  for (OtherEntity relatedEntity : entity.getRelationshipEntities() /* polymorphic */) {
    if (relatedEntity instanceof ConcreteEntityOne) { // this instanceof doesn't work because sometimes it could be a proxy
       // do something
    }
  }
}

                              

That will need to be changed to something like:

                              List<MyEntity> entities = query.list();

for(MyEntity entity : entities) {
  // some business logic
  for (OtherEntity relatedEntity : entity.getRelationshipEntities() /* polymorphic */) {
    OtherEntity unproxiedRelatedEntity = Hibernate.unproxy(relatedEntity);
    if (unproxiedRelatedEntity instanceof ConcreteEntityOne) { // this instanceof doesn't work because sometimes it could be a proxy
       // do something
    }
  }
}
                              

To avoid such thing being spread all over the place, then the only other way would be to have a hibernate listener that will unproxy the loaded entity and it will be in a single place… So, if I’m initializing a collection of a polymorphic entity, I’ll need to unproxy its elements.

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