@Test
public void testMergeMultipleEntityCopiesAllowed() {
Item item1 = new Item();
item1.setName("item1");
Hoarder hoarder = new Hoarder();
hoarder.setName("joe");
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist(item1);
em.persist(hoarder);
em.getTransaction().commit();
em.close();
// Get another representation of the same Item from a different EntityManager.
em = getOrCreateEntityManager();
Item item1_1 = em.find(Item.class, item1.getId());
em.close();
// item1_1 and item1_2 are unmodified representations of the same persistent entity.
assertFalse(item1 == item1_1);
assertTrue(item1.equals(item1_1));
// Update hoarder (detached) to references both representations.
hoarder.getItems().add(item1);
hoarder.setFavoriteItem(item1_1);
em = getOrCreateEntityManager();
em.getTransaction().begin();
// the merge should succeed because it does not have Category copies.
// (CustomEntityCopyObserver does not allow Category copies; it does allow Item copies)
hoarder = em.merge(hoarder);
assertEquals(1, hoarder.getItems().size());
assertSame(hoarder.getFavoriteItem(), hoarder.getItems().iterator().next());
assertEquals(item1.getId(), hoarder.getFavoriteItem().getId());
assertEquals(item1.getCategory(), hoarder.getFavoriteItem().getCategory());
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
hoarder = em.find(Hoarder.class, hoarder.getId());
assertEquals(1, hoarder.getItems().size());
assertSame(hoarder.getFavoriteItem(), hoarder.getItems().iterator().next());
assertEquals(item1.getId(), hoarder.getFavoriteItem().getId());
assertEquals(item1.getCategory(), hoarder.getFavoriteItem().getCategory());
em.getTransaction().commit();
em.close();
cleanup();
}
@Test
public void testCascadeFromDetachedToNonDirtyRepresentations() {
Item item1 = new Item();
item1.setName("item1");
Hoarder hoarder = new Hoarder();
hoarder.setName("joe");
Session s = openSession();
Transaction tx = session.beginTransaction();
s.persist(item1);
s.persist(hoarder);
tx.commit();
s.close();
// Get another representation of the same Item from a different session.
s = openSession();
Item item1_1 = (Item) s.get(Item.class, item1.getId());
s.close();
// item1_1 and item1_2 are unmodified representations of the same persistent entity.
assertFalse(item1 == item1_1);
assertTrue(item1.equals(item1_1));
// Update hoarder (detached) to references both representations.
hoarder.getItems().add(item1);
hoarder.setFavoriteItem(item1_1);
s = openSession();
tx = s.beginTransaction();
hoarder = (Hoarder) s.merge(hoarder);
assertEquals(1, hoarder.getItems().size());
assertSame(hoarder.getFavoriteItem(), hoarder.getItems().iterator().next());
assertEquals(item1.getId(), hoarder.getFavoriteItem().getId());
assertEquals(item1.getCategory(), hoarder.getFavoriteItem().getCategory());
tx.commit();
s.close();
s = openSession();
tx = s.beginTransaction();
hoarder = (Hoarder) s.merge(hoarder);
assertEquals(1, hoarder.getItems().size());
assertSame(hoarder.getFavoriteItem(), hoarder.getItems().iterator().next());
assertEquals(item1.getId(), hoarder.getFavoriteItem().getId());
assertEquals(item1.getCategory(), hoarder.getFavoriteItem().getCategory());
tx.commit();
s.close();
cleanup();
}
