/*
* 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.batchfetch;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
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 BatchFetchTest extends BaseCoreFunctionalTestCase {
@Override
public String[] getMappings() {
return new String[] { "batchfetch/ProductLine.hbm.xml" };
}
@SuppressWarnings( {"unchecked"})
@Test
public void testBatchFetch() {
Session s = openSession();
Transaction t = s.beginTransaction();
ProductLine cars = new ProductLine();
cars.setDescription( "Cars" );
Model monaro = new Model( cars );
monaro.setName( "monaro" );
monaro.setDescription( "Holden Monaro" );
Model hsv = new Model( cars );
hsv.setName( "hsv" );
hsv.setDescription( "Holden Commodore HSV" );
s.save( cars );
ProductLine oss = new ProductLine();
oss.setDescription( "OSS" );
Model jboss = new Model( oss );
jboss.setName( "JBoss" );
jboss.setDescription( "JBoss Application Server" );
Model hibernate = new Model( oss );
hibernate.setName( "Hibernate" );
hibernate.setDescription( "Hibernate" );
Model cache = new Model( oss );
cache.setName( "JBossCache" );
cache.setDescription( "JBoss TreeCache" );
s.save( oss );
t.commit();
s.close();
s.getSessionFactory().getCache().evictEntityRegion( Model.class );
s.getSessionFactory().getCache().evictEntityRegion( ProductLine.class );
s = openSession();
t = s.beginTransaction();
List list = s.createQuery( "from ProductLine pl order by pl.description" ).list();
cars = ( ProductLine ) list.get( 0 );
oss = ( ProductLine ) list.get( 1 );
assertFalse( Hibernate.isInitialized( cars.getModels() ) );
assertFalse( Hibernate.isInitialized( oss.getModels() ) );
assertEquals( cars.getModels().size(), 2 ); //fetch both collections
assertTrue( Hibernate.isInitialized( cars.getModels() ) );
assertTrue( Hibernate.isInitialized( oss.getModels() ) );
s.clear();
list = s.createQuery( "from Model m" ).list();
hibernate = ( Model ) s.get( Model.class, hibernate.getId() );
hibernate.getProductLine().getId();
for ( Object aList : list ) {
assertFalse( Hibernate.isInitialized( ((Model) aList).getProductLine() ) );
}
assertEquals( hibernate.getProductLine().getDescription(), "OSS" ); //fetch both productlines
s.clear();
Iterator iter = s.createQuery( "from Model" ).iterate();
list = new ArrayList();
while ( iter.hasNext() ) {
list.add( iter.next() );
}
Model m = ( Model ) list.get( 0 );
m.getDescription(); //fetch a batch of 4
s.clear();
list = s.createQuery( "from ProductLine" ).list();
ProductLine pl = ( ProductLine ) list.get( 0 );
ProductLine pl2 = ( ProductLine ) list.get( 1 );
s.evict( pl2 );
pl.getModels().size(); //fetch just one collection! (how can we write an assertion for that??)
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
list = s.createQuery( "from ProductLine pl order by pl.description" ).list();
cars = ( ProductLine ) list.get( 0 );
oss = ( ProductLine ) list.get( 1 );
assertEquals( cars.getModels().size(), 2 );
assertEquals( oss.getModels().size(), 3 );
s.delete( cars );
s.delete( oss );
t.commit();
s.close();
}
}