TernaryTest.java

/*
 * 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.test.ternary;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.AvailableSettings;
import org.hibernate.cfg.Configuration;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;

/**
 * @author Gavin King
 */
public class TernaryTest extends BaseCoreFunctionalTestCase {
	@Override
	public String[] getMappings() {
		return new String[] { "ternary/Ternary.hbm.xml" };
	}

	@Override
	protected void configure(Configuration configuration) {
		super.configure( configuration );
		configuration.setProperty( AvailableSettings.USE_SECOND_LEVEL_CACHE, "false" );
	}

	@Test
	public void testTernary() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		Employee bob = new Employee("Bob");
		Employee tom = new Employee("Tom");
		Employee jim = new Employee("Jim");
		Employee tim = new Employee("Tim");
		Site melb = new Site("Melbourne");
		Site geel = new Site("Geelong");
		s.persist(bob);
		s.persist(tom);
		s.persist(jim);
		s.persist(tim);
		s.persist(melb);
		s.persist(geel);
		bob.getManagerBySite().put(melb, tom);
		bob.getManagerBySite().put(geel, jim);
		tim.getManagerBySite().put(melb, tom);
		t.commit();
		s.close();
		
		s = openSession();
		t = s.beginTransaction();
		tom = (Employee) s.get(Employee.class, "Tom");
		assertFalse( Hibernate.isInitialized(tom.getUnderlings()) );
		assertEquals( tom.getUnderlings().size(), 2 );
		bob = (Employee) s.get(Employee.class, "Bob");
		assertFalse( Hibernate.isInitialized(bob.getManagerBySite()) );
		assertTrue( tom.getUnderlings().contains(bob) );
		melb = (Site) s.get(Site.class, "Melbourne");
		assertSame( bob.getManagerBySite().get(melb), tom );
		assertTrue( melb.getEmployees().contains(bob) );
		assertTrue( melb.getManagers().contains(tom) );
		t.commit();
		s.close();		

		s = openSession();
		t = s.beginTransaction();
		List l = s.createQuery("from Employee e join e.managerBySite m where m.name='Bob'").list();
		assertEquals( l.size(), 0 );
		l = s.createQuery("from Employee e join e.managerBySite m where m.name='Tom'").list();
		assertEquals( l.size(), 2 );
		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();
		l = s.createQuery("from Employee e left join fetch e.managerBySite").list();
		assertEquals( l.size(), 5 );
		Set set = new HashSet(l);
		assertEquals( set.size(), 4 );
		Iterator iter = set.iterator();
		int total=0;
		while ( iter.hasNext() ) {
			Map map = ( (Employee) iter.next() ).getManagerBySite();
			assertTrue( Hibernate.isInitialized(map) );
			total += map.size();
		}
		assertTrue(total==3);

		l = s.createQuery("from Employee e left join e.managerBySite m left join m.managerBySite m2").list();

		// clean up...
		l = s.createQuery("from Employee e left join fetch e.managerBySite").list();
		Iterator itr = l.iterator();
		while ( itr.hasNext() ) {
			Employee emp = ( Employee ) itr.next();
			emp.setManagerBySite( new HashMap() );
			s.delete( emp );
		}
		for ( Object entity : s.createQuery( "from Site" ).list() ) {
			s.delete( entity );
		}
		t.commit();
		s.close();
	}

	@Test
	public void testIndexRelatedFunctions() {
		Session session = openSession();
		session.beginTransaction();
		session.createQuery( "from Employee e join e.managerBySite as m where index(m) is not null" )
				.list();
		session.createQuery( "from Employee e join e.managerBySite as m where minIndex(m) is not null" )
				.list();
		session.createQuery( "from Employee e join e.managerBySite as m where maxIndex(m) is not null" )
				.list();
		session.getTransaction().commit();
		session.close();
	}
}