Should the object returned from query be the same object with the new created one before being persistent?

[han hongfang]

Hi devs,

I'm looking for if EJB persistence spec has any word on the requirement of
object movie_in and movie_out (see code snippet below). Should they be
movie_in == movie_out or movie_in.equals(movie_out)?

           EntityManager em = getEntityManager();
           Movie movie_in = new Movie("MovieNameA", "DirectorNameA",
"DescriptionA");
           em.persist(movie_in);
           em.flush();
           Movie movie_out = (Movie) em.createQuery("select m from MOVIE m
where m.name = 'MovieNameA' ").getSingleResult();

I'm hunting in the ejb3.1 spec and persistence2.0 specs for a while, but
failed to find the requirement. Can someone give me a hint on this? Thanks
in advance.

-- 
Best regards,

Han Hong Fang (Janet)
hanhongfang AT apache.org