Question

I have an entity A that has a foreign key of entity B:

entity A --> id, entity_a_name, foreign_key_entity_B 

When I call

return session.createCriteria(EntityA.class).list();  

I get the property of entityB inside entity A as well. How do I make it lazy load so it will not load enityB if not needed?

Answer 1

It’s unclear from your description what type of relationship you are talking about, but if it is Many-to-One or One-to-One, things aren’t so straightforward. If A.entityB is nullable (non-optional) then Hibernate is forced to eager-load the relationship in order to see if the property is null. Only by marking the relationship as non-optional (in which case Hibernate assumes that it isn’t null since it is an error otherwise) can you make it load lazily.