Hibernate example source code file (UnionSubclassTest.java)
The Hibernate UnionSubclassTest.java source code/*
* 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
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*/
package org.hibernate.test.unionsubclass;
import java.util.Iterator;
import java.util.List;
import org.hibernate.FetchMode;
import org.hibernate.Hibernate;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Order;
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.assertNotNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
/**
* @author Gavin King
*/
public class UnionSubclassTest extends BaseCoreFunctionalTestCase {
@Override
public String[] getMappings() {
return new String[] { "unionsubclass/Beings.hbm.xml" };
}
@Test
public void testUnionSubclassCollection() {
Session s = openSession();
Transaction t = s.beginTransaction();
Location mel = new Location("Earth");
s.save(mel);
Human gavin = new Human();
gavin.setIdentity("gavin");
gavin.setSex('M');
gavin.setLocation(mel);
mel.addBeing(gavin);
gavin.getInfo().put("foo", "bar");
gavin.getInfo().put("x", "y");
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
gavin = (Human) s.createCriteria(Human.class).uniqueResult();
assertEquals( gavin.getInfo().size(), 2 );
s.delete(gavin);
s.delete( gavin.getLocation() );
t.commit();
s.close();
}
@Test
public void testUnionSubclassFetchMode() {
Session s = openSession();
Transaction t = s.beginTransaction();
Location mel = new Location("Earth");
s.save(mel);
Human gavin = new Human();
gavin.setIdentity("gavin");
gavin.setSex('M');
gavin.setLocation(mel);
mel.addBeing(gavin);
Human max = new Human();
max.setIdentity("max");
max.setSex('M');
max.setLocation(mel);
mel.addBeing(gavin);
s.flush();
s.clear();
List list = s.createCriteria(Human.class)
.setFetchMode("location", FetchMode.JOIN)
.setFetchMode("location.beings", FetchMode.JOIN)
.list();
for (int i=0; i<list.size(); i++ ) {
Human h = (Human) list.get(i);
assertTrue( Hibernate.isInitialized( h.getLocation() ) );
assertTrue( Hibernate.isInitialized( h.getLocation().getBeings() ) );
s.delete(h);
}
s.delete( s.get( Location.class, new Long(mel.getId()) ) );
t.commit();
s.close();
}
@Test
public void testUnionSubclassOneToMany() {
Session s = openSession();
Transaction t = s.beginTransaction();
Location mel = new Location("Melbourne, Australia");
Location mars = new Location("Mars");
s.save(mel);
s.save(mars);
Human gavin = new Human();
gavin.setIdentity("gavin");
gavin.setSex('M');
gavin.setLocation(mel);
mel.addBeing(gavin);
Alien x23y4 = new Alien();
x23y4.setIdentity("x23y4$$hu%3");
x23y4.setLocation(mars);
x23y4.setSpecies("martian");
mars.addBeing(x23y4);
Alien yy3dk = new Alien();
yy3dk.setIdentity("yy3dk&*!!!");
yy3dk.setLocation(mars);
yy3dk.setSpecies("martian");
mars.addBeing(yy3dk);
Hive hive = new Hive();
hive.setLocation(mars);
hive.getMembers().add(x23y4);
x23y4.setHive(hive);
hive.getMembers().add(yy3dk);
yy3dk.setHive(hive);
s.persist(hive);
yy3dk.getHivemates().add(x23y4);
x23y4.getHivemates().add(yy3dk);
s.flush();
s.clear();
hive = (Hive) s.createQuery("from Hive h").uniqueResult();
assertFalse( Hibernate.isInitialized( hive.getMembers() ) );
assertEquals( hive.getMembers().size(), 2 );
s.clear();
hive = (Hive) s.createQuery("from Hive h left join fetch h.location left join fetch h.members").uniqueResult();
assertTrue( Hibernate.isInitialized( hive.getMembers() ) );
assertEquals( hive.getMembers().size(), 2 );
s.clear();
x23y4 = (Alien) s.createQuery("from Alien a left join fetch a.hivemates where a.identity like 'x%'").uniqueResult();
assertTrue( Hibernate.isInitialized( x23y4.getHivemates() ) );
assertEquals( x23y4.getHivemates().size(), 1 );
s.clear();
x23y4 = (Alien) s.createQuery("from Alien a where a.identity like 'x%'").uniqueResult();
assertFalse( Hibernate.isInitialized( x23y4.getHivemates() ) );
assertEquals( x23y4.getHivemates().size(), 1 );
s.clear();
x23y4 = (Alien) s.createCriteria(Alien.class).addOrder( Order.asc("identity") ).list().get(0);
s.delete( x23y4.getHive() );
s.delete( s.get(Location.class, new Long( mel.getId() ) ) );
s.delete( s.get(Location.class, new Long( mars.getId() ) ) );
assertTrue( s.createQuery("from Being").list().isEmpty() );
t.commit();
s.close();
}
@Test
public void testUnionSubclassManyToOne() {
Session s = openSession();
Transaction t = s.beginTransaction();
Location mel = new Location("Melbourne, Australia");
Location mars = new Location("Mars");
s.save(mel);
s.save(mars);
Human gavin = new Human();
gavin.setIdentity("gavin");
gavin.setSex('M');
gavin.setLocation(mel);
mel.addBeing(gavin);
Alien x23y4 = new Alien();
x23y4.setIdentity("x23y4$$hu%3");
x23y4.setLocation(mars);
x23y4.setSpecies("martian");
mars.addBeing(x23y4);
Hive hive = new Hive();
hive.setLocation(mars);
hive.getMembers().add(x23y4);
x23y4.setHive(hive);
s.persist(hive);
Thing thing = new Thing();
thing.setDescription("some thing");
thing.setOwner(gavin);
gavin.getThings().add(thing);
s.save(thing);
s.flush();
s.clear();
thing = (Thing) s.createQuery("from Thing t left join fetch t.owner").uniqueResult();
assertTrue( Hibernate.isInitialized( thing.getOwner() ) );
assertEquals( thing.getOwner().getIdentity(), "gavin" );
s.clear();
thing = (Thing) s.createQuery("select t from Thing t left join t.owner where t.owner.identity='gavin'").uniqueResult();
assertFalse( Hibernate.isInitialized( thing.getOwner() ) );
assertEquals( thing.getOwner().getIdentity(), "gavin" );
s.clear();
gavin = (Human) s.createQuery("from Human h left join fetch h.things").uniqueResult();
assertTrue( Hibernate.isInitialized( gavin.getThings() ) );
assertEquals( ( (Thing) gavin.getThings().get(0) ).getDescription(), "some thing" );
s.clear();
assertTrue( s.createQuery("from Being b left join fetch b.things").list().size()==2 );
s.clear();
gavin = (Human) s.createQuery("from Being b join fetch b.things").uniqueResult();
assertTrue( Hibernate.isInitialized( gavin.getThings() ) );
assertEquals( ( (Thing) gavin.getThings().get(0) ).getDescription(), "some thing" );
s.clear();
gavin = (Human) s.createQuery("select h from Human h join h.things t where t.description='some thing'").uniqueResult();
assertFalse( Hibernate.isInitialized( gavin.getThings() ) );
assertEquals( ( (Thing) gavin.getThings().get(0) ).getDescription(), "some thing" );
s.clear();
gavin = (Human) s.createQuery("select b from Being b join b.things t where t.description='some thing'").uniqueResult();
assertFalse( Hibernate.isInitialized( gavin.getThings() ) );
assertEquals( ( (Thing) gavin.getThings().get(0) ).getDescription(), "some thing" );
s.clear();
thing = (Thing) s.get( Thing.class, new Long( thing.getId() ) );
assertFalse( Hibernate.isInitialized( thing.getOwner() ) );
assertEquals( thing.getOwner().getIdentity(), "gavin" );
thing.getOwner().getThings().remove(thing);
thing.setOwner(x23y4);
x23y4.getThings().add(thing);
s.flush();
s.clear();
thing = (Thing) s.get( Thing.class, new Long( thing.getId() ) );
assertFalse( Hibernate.isInitialized( thing.getOwner() ) );
assertEquals( thing.getOwner().getIdentity(), "x23y4$$hu%3" );
s.delete(thing);
x23y4 = (Alien) s.createCriteria(Alien.class).uniqueResult();
s.delete( x23y4.getHive() );
s.delete( s.get(Location.class, new Long( mel.getId() ) ) );
s.delete( s.get(Location.class, new Long( mars.getId() ) ) );
assertTrue( s.createQuery("from Being").list().isEmpty() );
t.commit();
s.close();
}
@Test
public void testUnionSubclass() {
Session s = openSession();
Transaction t = s.beginTransaction();
Location mel = new Location("Melbourne, Australia");
Location atl = new Location("Atlanta, GA");
Location mars = new Location("Mars");
s.save(mel);
s.save(atl);
s.save(mars);
Human gavin = new Human();
gavin.setIdentity("gavin");
gavin.setSex('M');
gavin.setLocation(mel);
mel.addBeing(gavin);
Alien x23y4 = new Alien();
x23y4.setIdentity("x23y4$$hu%3");
x23y4.setLocation(mars);
x23y4.setSpecies("martian");
mars.addBeing(x23y4);
Hive hive = new Hive();
hive.setLocation(mars);
hive.getMembers().add(x23y4);
x23y4.setHive(hive);
s.persist(hive);
assertEquals( s.createQuery("from Being").list().size(), 2 );
assertEquals( s.createQuery("from Being b where b.class = Alien").list().size(), 1 );
assertEquals( s.createQuery("from Alien").list().size(), 1 );
s.clear();
List beings = s.createQuery("from Being b left join fetch b.location").list();
for ( Iterator iter = beings.iterator(); iter.hasNext(); ) {
Being b = (Being) iter.next();
assertTrue( Hibernate.isInitialized( b.getLocation() ) );
assertNotNull( b.getLocation().getName() );
assertNotNull( b.getIdentity() );
assertNotNull( b.getSpecies() );
}
assertEquals( beings.size(), 2 );
s.clear();
beings = s.createQuery("from Being").list();
for ( Iterator iter = beings.iterator(); iter.hasNext(); ) {
Being b = (Being) iter.next();
assertFalse( Hibernate.isInitialized( b.getLocation() ) );
assertNotNull( b.getLocation().getName() );
assertNotNull( b.getIdentity() );
assertNotNull( b.getSpecies() );
}
assertEquals( beings.size(), 2 );
s.clear();
List locations = s.createQuery("from Location").list();
int count = 0;
for ( Iterator iter = locations.iterator(); iter.hasNext(); ) {
Location l = (Location) iter.next();
assertNotNull( l.getName() );
Iterator iter2 = l.getBeings().iterator();
while ( iter2.hasNext() ) {
count++;
assertSame( ( (Being) iter2.next() ).getLocation(), l );
}
}
assertEquals(count, 2);
assertEquals( locations.size(), 3 );
s.clear();
locations = s.createQuery("from Location loc left join fetch loc.beings").list();
count = 0;
for ( Iterator iter = locations.iterator(); iter.hasNext(); ) {
Location l = (Location) iter.next();
assertNotNull( l.getName() );
Iterator iter2 = l.getBeings().iterator();
while ( iter2.hasNext() ) {
count++;
assertSame( ( (Being) iter2.next() ).getLocation(), l );
}
}
assertEquals(count, 2);
assertEquals( locations.size(), 3 );
s.clear();
gavin = (Human) s.get( Human.class, new Long( gavin.getId() ) );
atl = (Location) s.get( Location.class, new Long( atl.getId() ) );
atl.addBeing(gavin);
assertEquals( s.createQuery("from Human h where h.location.name like '%GA'").list().size(), 1 );
s.delete(gavin);
x23y4 = (Alien) s.createCriteria(Alien.class).uniqueResult();
s.delete( x23y4.getHive() );
assertTrue( s.createQuery("from Being").list().isEmpty() );
s.createQuery("delete from Location").executeUpdate();
t.commit();
s.close();
}
@Test
public void testNestedUnionedSubclasses() throws Exception {
Session s;
Transaction tx;
s = openSession();
tx = s.beginTransaction();
Location mel = new Location("Earth");
Human marcf = new Human();
marcf.setIdentity("marc");
marcf.setSex('M');
mel.addBeing(marcf);
Employee steve = new Employee();
steve.setIdentity("steve");
steve.setSex('M');
steve.setSalary( new Double(0) );
mel.addBeing(steve);
s.persist(mel);
tx.commit();
s.close();
s = openSession();
tx = s.beginTransaction();
Query q = s.createQuery( "from Being h where h.identity = :name1 or h.identity = :name2" );
q.setString("name1", "marc");
q.setString("name2", "steve");
final List result = q.list();
assertEquals( 2, result.size() );
s.delete( result.get(0) );
s.delete( result.get(1) );
s.delete( ( (Human) result.get(0) ).getLocation() );
tx.commit();
s.close();
}
}
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