/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2006-2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.test.joinfetch;
import java.util.List;
import org.hibernate.FetchMode;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.junit.Test;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author Gavin King
*/
public class JoinFetchTest extends BaseCoreFunctionalTestCase {
@Override
public String[] getMappings() {
return new String[] { "joinfetch/ItemBid.hbm.xml", "joinfetch/UserGroup.hbm.xml" };
}
@Override
public void configure(Configuration cfg) {
cfg.setProperty(Environment.MAX_FETCH_DEPTH, "10");
cfg.setProperty(Environment.USE_SECOND_LEVEL_CACHE, "false");
}
@Test
public void testProjection() {
Session s = openSession();
Transaction t = s.beginTransaction();
s.createCriteria(Item.class).setProjection( Projections.rowCount() ).uniqueResult();
s.createCriteria(Item.class).uniqueResult();
t.commit();
s.close();
}
@Test
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();
sessionFactory().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();
sessionFactory().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();
sessionFactory().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();
}
@Test
public void testCollectionFilter() {
Session s = openSession();
Transaction t = s.beginTransaction();
Group hb = new Group("hibernate");
User gavin = new User("gavin");
User max = new User("max");
hb.getUsers().put("gavin", gavin);
hb.getUsers().put("max", max);
gavin.getGroups().put("hibernate", hb);
max.getGroups().put("hibernate", hb);
s.persist(hb);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
hb = (Group) s.createCriteria(Group.class)
.setFetchMode("users", FetchMode.SELECT)
.add( Restrictions.idEq("hibernate") )
.uniqueResult();
assertFalse( Hibernate.isInitialized( hb.getUsers() ) );
//gavin = (User) s.createFilter( hb.getUsers(), "where index(this) = 'gavin'" ).uniqueResult();
Long size = (Long) s.createFilter( hb.getUsers(), "select count(*)" ).uniqueResult();
assertEquals( new Long(2), size );
assertFalse( Hibernate.isInitialized( hb.getUsers() ) );
s.delete(hb);
t.commit();
s.close();
}
@Test
public void testJoinFetchManyToMany() {
Session s = openSession();
Transaction t = s.beginTransaction();
Group hb = new Group("hibernate");
User gavin = new User("gavin");
User max = new User("max");
hb.getUsers().put("gavin", gavin);
hb.getUsers().put("max", max);
gavin.getGroups().put("hibernate", hb);
max.getGroups().put("hibernate", hb);
s.persist(hb);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
hb = (Group) s.get(Group.class, "hibernate");
assertTrue( Hibernate.isInitialized( hb.getUsers() ) );
gavin = (User) hb.getUsers().get("gavin");
assertFalse( Hibernate.isInitialized( gavin.getGroups() ) );
max = (User) s.get(User.class, "max");
assertFalse( Hibernate.isInitialized( max.getGroups() ) );
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
hb = (Group) s.createCriteria(Group.class)
.setFetchMode("users", FetchMode.JOIN)
.setFetchMode("users.groups", FetchMode.JOIN)
.uniqueResult();
assertTrue( Hibernate.isInitialized( hb.getUsers() ) );
gavin = (User) hb.getUsers().get("gavin");
assertTrue( Hibernate.isInitialized( gavin.getGroups() ) );
max = (User) s.get(User.class, "max");
assertTrue( Hibernate.isInitialized( max.getGroups() ) );
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
s.delete(hb);
t.commit();
s.close();
}
}