/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.jpa.test.emops;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import org.junit.Test;
import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
/**
* @author Emmanuel Bernard
*/
public class MergeTest extends BaseEntityManagerFunctionalTestCase {
@Test
public void testMergeWithIndexColumn() {
Race race = new Race();
race.competitors.add( new Competitor( "Name" ) );
race.competitors.add( new Competitor() );
race.competitors.add( new Competitor() );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( race );
em.flush();
em.clear();
race.competitors.add( new Competitor() );
race.competitors.remove( 2 );
race.competitors.remove( 1 );
race.competitors.get( 0 ).setName( "Name2" );
race = em.merge( race );
em.flush();
em.clear();
race = em.find( Race.class, race.id );
assertEquals( 2, race.competitors.size() );
assertEquals( "Name2", race.competitors.get( 0 ).getName() );
em.getTransaction().rollback();
em.close();
}
@Test
public void testMergeManyToMany() {
Competition competition = new Competition();
competition.getCompetitors().add( new Competitor( "Name" ) );
competition.getCompetitors().add( new Competitor() );
competition.getCompetitors().add( new Competitor() );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( competition );
em.flush();
em.clear();
competition.getCompetitors().add( new Competitor() );
competition.getCompetitors().remove( 2 );
competition.getCompetitors().remove( 1 );
competition.getCompetitors().get( 0 ).setName( "Name2" );
competition = em.merge( competition );
em.flush();
em.clear();
competition = em.find( Competition.class, competition.getId() );
assertEquals( 2, competition.getCompetitors().size() );
// we cannot assume that the order in the list is maintained - HHH-4516
String changedCompetitorName;
if ( competition.getCompetitors().get( 0 ).getName() != null ) {
changedCompetitorName = competition.getCompetitors().get( 0 ).getName();
}
else {
changedCompetitorName = competition.getCompetitors().get( 1 ).getName();
}
assertEquals( "Name2", changedCompetitorName );
em.getTransaction().rollback();
em.close();
}
@Test
public void testMergeManyToManyWithDeference() {
Competition competition = new Competition();
competition.getCompetitors().add( new Competitor( "Name" ) );
competition.getCompetitors().add( new Competitor() );
competition.getCompetitors().add( new Competitor() );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( competition );
em.flush();
em.clear();
List<Competitor> newComp = new ArrayList<Competitor>();
newComp.add( competition.getCompetitors().get( 0 ) );
newComp.add( new Competitor() );
newComp.get( 0 ).setName( "Name2" );
competition.setCompetitors( newComp );
competition = em.merge( competition );
em.flush();
em.clear();
competition = em.find( Competition.class, competition.getId() );
assertEquals( 2, competition.getCompetitors().size() );
// we cannot assume that the order in the list is maintained - HHH-4516
String changedCompetitorName;
if ( competition.getCompetitors().get( 0 ).getName() != null ) {
changedCompetitorName = competition.getCompetitors().get( 0 ).getName();
}
else {
changedCompetitorName = competition.getCompetitors().get( 1 ).getName();
}
assertEquals( "Name2", changedCompetitorName );
em.getTransaction().rollback();
em.close();
}
@Test
public void testRemoveAndMerge() {
Race race = new Race();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( race );
em.flush();
em.clear();
race = em.find( Race.class, race.id );
em.remove( race );
try {
race = em.merge( race );
em.flush();
fail( "Should raise an IllegalArgumentException" );
}
catch ( IllegalArgumentException e ) {
//all good
}
catch ( Exception e ) {
fail( "Should raise an IllegalArgumentException" );
}
em.getTransaction().rollback();
em.close();
}
@Test
public void testConcurrentMerge() {
Race race = new Race();
race.name = "Derby";
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( race );
em.flush();
em.getTransaction().commit();
em.close();
race.name = "Magnicourt";
em = getOrCreateEntityManager();
em.getTransaction().begin();
Race race2 = em.find( Race.class, race.id );
race2.name = "Mans";
race = em.merge( race );
em.flush();
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
race2 = em.find( Race.class, race.id );
assertEquals( "Last commit win in merge", "Magnicourt", race2.name );
em.remove( race2 );
em.getTransaction().commit();
em.close();
}
@Test
public void testMergeUnidirectionalOneToMany() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Empire roman = new Empire();
em.persist( roman );
em.flush();
em.clear();
roman = em.find( Empire.class, roman.getId() );
Colony gaule = new Colony();
roman.getColonies().add( gaule );
em.merge( roman );
em.flush();
em.clear();
roman = em.find( Empire.class, roman.getId() );
assertEquals( 1, roman.getColonies().size() );
em.getTransaction().rollback();
em.close();
}
@Override
public Class[] getAnnotatedClasses() {
return new Class[] {
Race.class,
Competitor.class,
Competition.class,
Empire.class,
Colony.class
};
}
}