public void testJoinFetch() {
Session s = openSession();
Transaction t = s.beginTransaction();
s.createQuery("delete from Bid").executeUpdate();
s.createQuery("delete from Comment").executeUpdate();
s.createQuery("delete from Item").executeUpdate();
t.commit();
s.close();
Category cat = new Category("Photography");
Item i = new Item(cat, "Camera");
Bid b = new Bid(i, 100.0f);
new Bid(i, 105.0f);
new Comment(i, "This looks like a really good deal");
new Comment(i, "Is it the latest version?");
new Comment(i, "<comment deleted>");
System.out.println(b.getTimestamp());
s = openSession();
t = s.beginTransaction();
s.persist(cat);
s.persist(i);
t.commit();
s.close();
getSessions().evict(Item.class);
s = openSession();
t = s.beginTransaction();
i = (Item) s.get(Item.class, i.getId());
assertTrue(Hibernate.isInitialized(i.getBids()));
assertEquals(i.getBids().size(), 2);
assertTrue(Hibernate.isInitialized(i.getComments()));
assertEquals(i.getComments().size(), 3);
t.commit();
s.close();
getSessions().evict(Bid.class);
s = openSession();
t = s.beginTransaction();
b = (Bid) s.get(Bid.class, b.getId());
assertTrue(Hibernate.isInitialized(b.getItem()));
assertTrue(Hibernate.isInitialized(b.getItem().getComments()));
assertEquals(b.getItem().getComments().size(), 3);
System.out.println(b.getTimestamp());
t.commit();
s.close();
getSessions().evictCollection(Item.class.getName() + ".bids");
s = openSession();
t = s.beginTransaction();
i =
(Item)
s.createCriteria(Item.class)
.setFetchMode("bids", FetchMode.SELECT)
.setFetchMode("comments", FetchMode.SELECT)
.uniqueResult();
assertFalse(Hibernate.isInitialized(i.getBids()));
assertFalse(Hibernate.isInitialized(i.getComments()));
b = (Bid) i.getBids().iterator().next();
assertTrue(Hibernate.isInitialized(b.getItem()));
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
i =
(Item)
s.createQuery("from Item i left join fetch i.bids left join fetch i.comments")
.uniqueResult();
assertTrue(Hibernate.isInitialized(i.getBids()));
assertTrue(Hibernate.isInitialized(i.getComments()));
assertEquals(i.getComments().size(), 3);
assertEquals(i.getBids().size(), 2);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
Object[] row = (Object[]) s.getNamedQuery(Item.class.getName() + ".all").list().get(0);
i = (Item) row[0];
assertTrue(Hibernate.isInitialized(i.getBids()));
assertTrue(Hibernate.isInitialized(i.getComments()));
assertEquals(i.getComments().size(), 3);
assertEquals(i.getBids().size(), 2);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
i = (Item) s.createCriteria(Item.class).uniqueResult();
assertTrue(Hibernate.isInitialized(i.getBids()));
assertTrue(Hibernate.isInitialized(i.getComments()));
assertEquals(i.getComments().size(), 3);
assertEquals(i.getBids().size(), 2);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
List bids =
s.createQuery("from Bid b left join fetch b.item i left join fetch i.category").list();
Bid bid = (Bid) bids.get(0);
assertTrue(Hibernate.isInitialized(bid.getItem()));
assertTrue(Hibernate.isInitialized(bid.getItem().getCategory()));
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
List pairs = s.createQuery("from Item i left join i.bids b left join fetch i.category").list();
Item item = (Item) ((Object[]) pairs.get(0))[0];
assertFalse(Hibernate.isInitialized(item.getBids()));
assertTrue(Hibernate.isInitialized(item.getCategory()));
s.clear();
pairs = s.createQuery("from Item i left join i.bids b left join i.category").list();
item = (Item) ((Object[]) pairs.get(0))[0];
assertFalse(Hibernate.isInitialized(item.getBids()));
assertTrue(Hibernate.isInitialized(item.getCategory()));
s.clear();
pairs = s.createQuery("from Bid b left join b.item i left join fetch i.category").list();
bid = (Bid) ((Object[]) pairs.get(0))[0];
assertTrue(Hibernate.isInitialized(bid.getItem()));
assertTrue(Hibernate.isInitialized(bid.getItem().getCategory()));
s.clear();
pairs = s.createQuery("from Bid b left join b.item i left join i.category").list();
bid = (Bid) ((Object[]) pairs.get(0))[0];
assertTrue(Hibernate.isInitialized(bid.getItem()));
assertTrue(Hibernate.isInitialized(bid.getItem().getCategory()));
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
s.createQuery("delete from Bid").executeUpdate();
s.createQuery("delete from Comment").executeUpdate();
s.createQuery("delete from Item").executeUpdate();
s.createQuery("delete from Category").executeUpdate();
t.commit();
s.close();
}
