CriteriaQueryTest.java

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 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.criteria;

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

import org.hibernate.Criteria;
import org.hibernate.FetchMode;
import org.hibernate.Hibernate;
import org.hibernate.JDBCException;
import org.hibernate.QueryException;
import org.hibernate.ScrollableResults;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Example;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projection;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Property;
import org.hibernate.criterion.Restrictions;
import org.hibernate.criterion.Subqueries;
import org.hibernate.exception.SQLGrammarException;
import org.hibernate.internal.util.SerializationHelper;
import org.hibernate.transform.Transformers;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.Type;

import org.junit.Test;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.hibernate.test.hql.Animal;
import org.hibernate.test.hql.Reptile;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * @author Gavin King
 */
public class CriteriaQueryTest extends BaseCoreFunctionalTestCase {
	@Override
	public String[] getMappings() {
		return new String[] { "criteria/Enrolment.hbm.xml","criteria/Foo.hbm.xml", "hql/Animal.hbm.xml" };
	}

	@Override
	public void configure(Configuration cfg) {
		super.configure( cfg );
		cfg.setProperty( Environment.USE_QUERY_CACHE, "true" );
		cfg.setProperty( Environment.CACHE_REGION_PREFIX, "criteriaquerytest" );
		cfg.setProperty( Environment.USE_SECOND_LEVEL_CACHE, "true" );
		cfg.setProperty( Environment.GENERATE_STATISTICS, "true" );
	}

	@Test
	public void testEscapeCharacter() {
		Session session = openSession();
		Transaction t = session.beginTransaction();
		Course c1 = new Course();
		c1.setCourseCode( "course-1" );
		c1.setDescription( "%1" );
		Course c2 = new Course();
		c2.setCourseCode( "course-2" );
		c2.setDescription( "%2" );
		Course c3 = new Course();
		c3.setCourseCode( "course-3" );
		c3.setDescription( "control" );
		session.persist( c1 );
		session.persist( c2 );
		session.persist( c3 );
		session.flush();
		session.clear();

		// finds all courses which have a description equal to '%1'
		Course example = new Course();
		example.setDescription( "&%1" );
		List result = session.createCriteria( Course.class )
				.add( Example.create( example ).ignoreCase().enableLike().setEscapeCharacter( new Character( '&' ) ) )
				.list();
		assertEquals( 1, result.size() );
		// finds all courses which contain '%' as the first char in the description
		example.setDescription( "&%%" );
		result = session.createCriteria( Course.class )
				.add( Example.create( example ).ignoreCase().enableLike().setEscapeCharacter( new Character( '&' ) ) )
				.list();
		assertEquals( 2, result.size() );

		session.createQuery( "delete Course" ).executeUpdate();
		t.commit();
		session.close();
	}

	@Test
	public void testScrollCriteria() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		session.persist(course);
		session.flush();
		session.clear();
		ScrollableResults sr = session.createCriteria(Course.class).scroll();
		assertTrue( sr.next() );
		course = (Course) sr.get(0);
		assertNotNull(course);
		sr.close();
		session.delete(course);

		t.commit();
		session.close();
	}
	
	@Test
	public void testSubselect() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		session.persist(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);
		session.persist(gavin);

		Enrolment enrolment2 = new Enrolment();
		enrolment2.setCourse(course);
		enrolment2.setCourseCode(course.getCourseCode());
		enrolment2.setSemester((short) 3);
		enrolment2.setYear((short) 1998);
		enrolment2.setStudent(gavin);
		enrolment2.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment2);
		session.persist(enrolment2);

		DetachedCriteria dc = DetachedCriteria.forClass(Student.class)
			.add( Property.forName("studentNumber").eq( new Long(232) ) )
			.setProjection( Property.forName("name") );

		session.createCriteria(Student.class)
			.add( Subqueries.propertyEqAll("name", dc) )
			.list();

		session.createCriteria(Student.class)
			.add( Subqueries.exists(dc) )
			.list();

		session.createCriteria(Student.class)
			.add( Property.forName("name").eqAll(dc) )
			.list();

		session.createCriteria(Student.class)
			.add( Subqueries.in("Gavin King", dc) )
			.list();

		DetachedCriteria dc2 = DetachedCriteria.forClass(Student.class, "st")
			.add( Property.forName("st.studentNumber").eqProperty("e.studentNumber") )
			.setProjection( Property.forName("name") );

		session.createCriteria(Enrolment.class, "e")
			.add( Subqueries.eq("Gavin King", dc2) )
			.list();

		DetachedCriteria dc3 = DetachedCriteria.forClass(Student.class, "st")
			.createCriteria("enrolments")
				.createCriteria("course")
					.add( Property.forName("description").eq("Hibernate Training") )
					.setProjection( Property.forName("st.name") );

		session.createCriteria(Enrolment.class, "e")
			.add( Subqueries.eq("Gavin King", dc3) )
			.list();

		DetachedCriteria dc4 = DetachedCriteria.forClass(Student.class, "st")
			.setProjection( Property.forName("name").as( "stname" ) );

		dc4.getExecutableCriteria( session ).list();

		dc4.getExecutableCriteria( session ).addOrder( Order.asc( "stname" ) ).list();

		session.createCriteria(Enrolment.class, "e")
			.add( Subqueries.eq("Gavin King", dc4) )
			.list();

		session.delete(enrolment2);
		session.delete(gavin);
		session.delete(course);
		t.commit();
		session.close();
	}

	@Test
	public void testSubselectWithComponent() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		session.persist(course);

		CityState odessaWa = new CityState( "Odessa", "WA" );

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);
		gavin.setCityState( odessaWa );
		session.persist(gavin);

		Enrolment enrolment2 = new Enrolment();
		enrolment2.setCourse(course);
		enrolment2.setCourseCode(course.getCourseCode());
		enrolment2.setSemester((short) 3);
		enrolment2.setYear((short) 1998);
		enrolment2.setStudent(gavin);
		enrolment2.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment2);
		session.persist(enrolment2);

		DetachedCriteria dc = DetachedCriteria.forClass(Student.class)
			.add( Property.forName("cityState").eq( odessaWa ) )
			.setProjection( Property.forName("cityState") );

		session.createCriteria(Student.class)
			.add( Subqueries.exists(dc) )
			.list();
		t.commit();
		session.close();

		session = openSession();
		t = session.beginTransaction();
		try {
			session.createCriteria(Student.class)
				.add( Subqueries.propertyEqAll("cityState", dc) )
				.list();
			fail( "should have failed because cannot compare subquery results with multiple columns" );
		}
		catch ( QueryException ex ) {
			// expected
		}
		finally {
			t.rollback();
			session.close();
		}

		session = openSession();
		t = session.beginTransaction();
		try {
			session.createCriteria(Student.class)
				.add( Property.forName("cityState").eqAll(dc) )
				.list();
			fail( "should have failed because cannot compare subquery results with multiple columns" );
		}
		catch ( QueryException ex ) {
			// expected
		}
		finally {
			t.rollback();
			session.close();
		}

		session = openSession();
		t = session.beginTransaction();
		try {
			session.createCriteria(Student.class)
				.add( Subqueries.in( odessaWa, dc) )
				.list();
			fail( "should have failed because cannot compare subquery results with multiple columns" );
		}
		catch ( JDBCException ex ) {
			// expected
		}
		finally {
			t.rollback();
			session.close();
		}

		session = openSession();
		t = session.beginTransaction();
		DetachedCriteria dc2 = DetachedCriteria.forClass(Student.class, "st1")
			.add( Property.forName("st1.cityState").eqProperty("st2.cityState") )
			.setProjection( Property.forName("cityState") );
		try {
			session.createCriteria(Student.class, "st2")
				.add( Subqueries.eq( odessaWa, dc2) )
				.list();
			fail( "should have failed because cannot compare subquery results with multiple columns" );
		}
		catch ( JDBCException ex ) {
			// expected
		}
		finally {
			t.rollback();
			session.close();
		}

		session = openSession();
		t = session.beginTransaction();
		DetachedCriteria dc3 = DetachedCriteria.forClass(Student.class, "st")
			.createCriteria("enrolments")
				.createCriteria("course")
					.add( Property.forName("description").eq("Hibernate Training") )
					.setProjection( Property.forName("st.cityState") );
		try {
			session.createCriteria(Enrolment.class, "e")
				.add( Subqueries.eq( odessaWa, dc3) )
				.list();
			fail( "should have failed because cannot compare subquery results with multiple columns" );
		}
		catch ( JDBCException ex ) {
			// expected
		}
		finally {
			t.rollback();
			session.close();
		}

		session = openSession();
		t = session.beginTransaction();
		session.delete(enrolment2);
		session.delete(gavin);
		session.delete(course);
		t.commit();
		session.close();

	}

	@Test
	public void testDetachedCriteria() {
		DetachedCriteria dc = DetachedCriteria.forClass(Student.class)
			.add( Property.forName("name").eq("Gavin King") )
			.addOrder( Order.asc("studentNumber") )
			.setProjection( Property.forName("studentNumber") );

		byte[] bytes = SerializationHelper.serialize(dc);

		dc = (DetachedCriteria) SerializationHelper.deserialize( bytes );

		Session session = openSession();
		Transaction t = session.beginTransaction();

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);
		Student bizarroGavin = new Student();
		bizarroGavin.setName("Gavin King");
		bizarroGavin.setStudentNumber(666);
		session.persist(bizarroGavin);
		session.persist(gavin);

		List result = dc.getExecutableCriteria(session)
			.setMaxResults(3)
			.list();

		assertEquals( result.size(), 2 );
		assertEquals( result.get(0), new Long(232) );
		assertEquals( result.get(1), new Long(666) );

		session.delete(gavin);
		session.delete(bizarroGavin);
		t.commit();
		session.close();
	}

	@Test
	public void testProjectionCache() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(666);
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		s.save(xam);

		Enrolment enrolment1 = new Enrolment();
		enrolment1.setCourse(course);
		enrolment1.setCourseCode(course.getCourseCode());
		enrolment1.setSemester((short) 1);
		enrolment1.setYear((short) 1999);
		enrolment1.setStudent(xam);
		enrolment1.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment1);
		s.save(enrolment1);

		Enrolment enrolment2 = new Enrolment();
		enrolment2.setCourse(course);
		enrolment2.setCourseCode(course.getCourseCode());
		enrolment2.setSemester((short) 3);
		enrolment2.setYear((short) 1998);
		enrolment2.setStudent(gavin);
		enrolment2.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment2);
		s.save(enrolment2);

		List list = s.createCriteria(Enrolment.class)
			.createAlias( "student", "s" )
			.createAlias( "course", "c" )
			.add( Restrictions.isNotEmpty( "s.enrolments" ) )
			.setProjection(
					Projections.projectionList()
							.add( Projections.property( "s.name" ) )
							.add( Projections.property( "c.description" ) )
			)
			.setCacheable( true )
			.list();

		assertEquals( list.size(), 2 );
		assertEquals( ( (Object[]) list.get(0) ).length, 2 );
		assertEquals( ( (Object[]) list.get(1) ).length, 2 );

		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();

		s.createCriteria(Enrolment.class)
			.createAlias( "student", "s" )
			.createAlias( "course", "c" )
			.add( Restrictions.isNotEmpty( "s.enrolments" ) )
			.setProjection(
					Projections.projectionList()
							.add( Projections.property( "s.name" ) )
							.add( Projections.property( "c.description" ) )
			)
			.setCacheable( true )
			.list();

		assertEquals( list.size(), 2 );
		assertEquals( ( (Object[]) list.get(0) ).length, 2 );
		assertEquals( ( (Object[]) list.get(1) ).length, 2 );

		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();

		s.createCriteria(Enrolment.class)
			.createAlias( "student", "s" )
			.createAlias( "course", "c" )
			.add( Restrictions.isNotEmpty( "s.enrolments" ) )
			.setProjection(
					Projections.projectionList()
							.add( Projections.property( "s.name" ) )
							.add( Projections.property( "c.description" ) )
			)
			.setCacheable( true )
			.list();

		assertEquals( list.size(), 2 );
		assertEquals( ( (Object[]) list.get(0) ).length, 2 );
		assertEquals( ( (Object[]) list.get(1) ).length, 2 );

		s.delete(enrolment1);
		s.delete(enrolment2);
		s.delete(course);
		s.delete(gavin);
		s.delete(xam);

		t.commit();
		s.close();
	}

	@Test
	public void testProjections() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);

		//s.flush();

		Long count = (Long) s.createCriteria(Enrolment.class)
			.setProjection( Projections.count("studentNumber").setDistinct() )
			.uniqueResult();
		assertEquals(count, new Long(2));

		count = (Long) s.createCriteria(Enrolment.class)
			.setProjection( Projections.countDistinct("studentNumber") )
			.uniqueResult();
		assertEquals(count, new Long(2));

		count = (Long) s.createCriteria(Enrolment.class)
			.setProjection( Projections.countDistinct("courseCode").as( "cnt" ) )
			.uniqueResult();
		assertEquals(count, new Long(1));

		Object object = s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList()
					.add( Projections.count("studentNumber") )
					.add( Projections.max("studentNumber") )
					.add( Projections.min("studentNumber") )
					.add( Projections.avg("studentNumber") )
			)
			.uniqueResult();
		Object[] result = (Object[])object;

		assertEquals(new Long(2),result[0]);
		assertEquals(new Long(667),result[1]);
		assertEquals(new Long(101),result[2]);
		assertEquals( 384.0, ( (Double) result[3] ).doubleValue(), 0.01 );


		List resultWithMaps = s.createCriteria(Enrolment.class)
			.setProjection( Projections.distinct( Projections.projectionList()
					.add( Projections.property("studentNumber"), "stNumber" )
					.add( Projections.property("courseCode"), "cCode" ) )
			)
		    .add( Restrictions.gt( "studentNumber", new Long(665) ) )
		    .add( Restrictions.lt( "studentNumber", new Long(668) ) )
		    .addOrder( Order.asc("stNumber") )
			.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP)
			.list();

		assertEquals(1, resultWithMaps.size());
		Map m1 = (Map) resultWithMaps.get(0);

		assertEquals(new Long(667), m1.get("stNumber"));
		assertEquals(course.getCourseCode(), m1.get("cCode"));

		resultWithMaps = s.createCriteria(Enrolment.class)
			.setProjection( Projections.property("studentNumber").as("stNumber") )
		    .addOrder( Order.desc("stNumber") )
			.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP)
			.list();

		assertEquals(2, resultWithMaps.size());
		Map m0 = (Map) resultWithMaps.get(0);
		m1 = (Map) resultWithMaps.get(1);

		assertEquals(new Long(101), m1.get("stNumber"));
		assertEquals(new Long(667), m0.get("stNumber"));


		List resultWithAliasedBean = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Projections.property("st.name"), "studentName" )
					.add( Projections.property("co.description"), "courseDescription" )
			)
			.addOrder( Order.desc("studentName") )
			.setResultTransformer( Transformers.aliasToBean(StudentDTO.class) )
			.list();

		assertEquals(2, resultWithAliasedBean.size());

		StudentDTO dto = (StudentDTO) resultWithAliasedBean.get(0);
		assertNotNull(dto.getDescription());
		assertNotNull(dto.getName());

		s.createCriteria(Student.class)
			.add( Restrictions.like("name", "Gavin", MatchMode.START) )
			.addOrder( Order.asc("name") )
			.createCriteria("enrolments", "e")
				.addOrder( Order.desc("year") )
				.addOrder( Order.desc("semester") )
			.createCriteria("course","c")
				.addOrder( Order.asc("description") )
				.setProjection( Projections.projectionList()
					.add( Projections.property("this.name") )
					.add( Projections.property("e.year") )
					.add( Projections.property("e.semester") )
					.add( Projections.property("c.courseCode") )
					.add( Projections.property("c.description") )
				)
			.uniqueResult();

		Projection p1 = Projections.projectionList()
			.add( Projections.count("studentNumber") )
			.add( Projections.max("studentNumber") )
			.add( Projections.rowCount() );

		Projection p2 = Projections.projectionList()
			.add( Projections.min("studentNumber") )
			.add( Projections.avg("studentNumber") )
			.add( Projections.sqlProjection(
					"1 as constOne, count(*) as countStar",
					new String[] { "constOne", "countStar" },
					new Type[] { StandardBasicTypes.INTEGER, StandardBasicTypes.INTEGER }
			) );

		Object[] array = (Object[]) s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList().add(p1).add(p2) )
			.uniqueResult();

		assertEquals( array.length, 7 );

		List list = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Projections.groupProperty("co.courseCode") )
					.add( Projections.count("st.studentNumber").setDistinct() )
					.add( Projections.groupProperty("year") )
			)
			.list();

		assertEquals( list.size(), 2 );

		Object g = s.createCriteria(Student.class)
			.add( Restrictions.idEq( new Long(667) ) )
			.setFetchMode("enrolments", FetchMode.JOIN)
			//.setFetchMode("enrolments.course", FetchMode.JOIN) //TODO: would love to make that work...
			.uniqueResult();
		assertSame(g, gavin);

		s.delete(gavin);
		s.delete(xam);
		s.delete(course);

		t.commit();
		s.close();
	}

	@Test
	public void testProjectionsUsingProperty() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		course.getCourseMeetings().add( new CourseMeeting( course, "Monday", 1, "1313 Mockingbird Lane" ) );
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		CityState odessaWa = new CityState( "Odessa", "WA" );
		gavin.setCityState( odessaWa );
		gavin.setPreferredCourse( course );
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);

		s.flush();

		List  resultList = s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList()
					.add( Property.forName( "student" ), "student" )
					.add( Property.forName( "course" ), "course" )
					.add( Property.forName( "semester" ), "semester" )
					.add( Property.forName("year"), "year" )
			)
			.list();
		assertEquals( 2, resultList.size() );
		for ( Iterator it = resultList.iterator(); it.hasNext(); ) {
			Object[] objects = ( Object[] ) it.next();
			assertEquals( 4, objects.length );
			assertTrue( objects[ 0 ] instanceof Student );
			assertTrue( objects[ 1 ] instanceof Course );
			assertTrue( objects[ 2 ] instanceof Short );
			assertTrue( objects[ 3 ] instanceof Short );
		}

		resultList = s.createCriteria(Student.class)
			.setProjection( Projections.projectionList()
					.add( Projections.id().as( "studentNumber" ))
					.add( Property.forName( "name" ), "name" )
					.add( Property.forName( "cityState" ), "cityState" )
					.add( Property.forName("preferredCourse"), "preferredCourse" )
			)
			.list();
		assertEquals( 2, resultList.size() );
		for ( Iterator it = resultList.iterator(); it.hasNext(); ) {
			Object[] objects = ( Object[] ) it.next();
			assertEquals( 4, objects.length );
			assertTrue( objects[ 0 ] instanceof Long );
			assertTrue( objects[ 1 ] instanceof String );
			if ( "Gavin King".equals( objects[ 1 ] ) ) {
				assertTrue( objects[ 2 ] instanceof CityState );
				assertTrue( objects[ 3 ] instanceof Course );
			}
			else {
				assertNull( objects[ 2 ] );
				assertNull( objects[ 3 ] );
			}
		}

		resultList = s.createCriteria(Student.class)
			.add(Restrictions.eq("name", "Gavin King"))
			.setProjection( Projections.projectionList()
					.add( Projections.id().as( "studentNumber" ))
					.add( Property.forName( "name" ), "name" )
					.add( Property.forName( "cityState" ), "cityState" )
					.add( Property.forName("preferredCourse"), "preferredCourse" )
			)
			.list();
		assertEquals( 1, resultList.size() );

		Object[] aResult = ( Object[] ) s.createCriteria(Student.class)
			.add( Restrictions.idEq( new Long( 667 ) ) )
			.setProjection( Projections.projectionList()
					.add( Projections.id().as( "studentNumber" ))
					.add( Property.forName( "name" ), "name" )
					.add( Property.forName( "cityState" ), "cityState" )
					.add( Property.forName("preferredCourse"), "preferredCourse" )
			)
			.uniqueResult();
		assertNotNull( aResult );
		assertEquals( 4, aResult.length );
		assertTrue( aResult[ 0 ] instanceof Long );
		assertTrue( aResult[ 1 ] instanceof String );
		assertTrue( aResult[ 2 ] instanceof CityState );
		assertTrue( aResult[ 3 ] instanceof Course );

		Long count = (Long) s.createCriteria(Enrolment.class)
			.setProjection( Property.forName("studentNumber").count().setDistinct() )
			.uniqueResult();
		assertEquals(count, new Long(2));

		Object object = s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList()
					.add( Property.forName("studentNumber").count() )
					.add( Property.forName("studentNumber").max() )
					.add( Property.forName("studentNumber").min() )
					.add( Property.forName("studentNumber").avg() )
			)
			.uniqueResult();
		Object[] result = (Object[])object;

		assertEquals(new Long(2),result[0]);
		assertEquals(new Long(667),result[1]);
		assertEquals(new Long(101),result[2]);
		assertEquals(384.0, ( (Double) result[3] ).doubleValue(), 0.01);


		s.createCriteria(Enrolment.class)
		    .add( Property.forName("studentNumber").gt( new Long(665) ) )
		    .add( Property.forName("studentNumber").lt( new Long(668) ) )
		    .add( Property.forName("courseCode").like("HIB", MatchMode.START) )
		    .add( Property.forName("year").eq( new Short( (short) 1999 ) ) )
		    .addOrder( Property.forName("studentNumber").asc() )
			.uniqueResult();

		List resultWithMaps = s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList()
					.add( Property.forName("studentNumber").as("stNumber") )
					.add( Property.forName("courseCode").as("cCode") )
			)
		    .add( Property.forName("studentNumber").gt( new Long(665) ) )
		    .add( Property.forName("studentNumber").lt( new Long(668) ) )
		    .addOrder( Property.forName("studentNumber").asc() )
			.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP)
			.list();

		assertEquals(1, resultWithMaps.size());
		Map m1 = (Map) resultWithMaps.get(0);

		assertEquals(new Long(667), m1.get("stNumber"));
		assertEquals(course.getCourseCode(), m1.get("cCode"));

		resultWithMaps = s.createCriteria(Enrolment.class)
			.setProjection( Property.forName("studentNumber").as("stNumber") )
		    .addOrder( Order.desc("stNumber") )
			.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP)
			.list();

		assertEquals(2, resultWithMaps.size());
		Map m0 = (Map) resultWithMaps.get(0);
		m1 = (Map) resultWithMaps.get(1);

		assertEquals(new Long(101), m1.get("stNumber"));
		assertEquals(new Long(667), m0.get("stNumber"));


		List resultWithAliasedBean = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Property.forName("st.name").as("studentName") )
					.add( Property.forName("co.description").as("courseDescription") )
			)
			.addOrder( Order.desc("studentName") )
			.setResultTransformer( Transformers.aliasToBean(StudentDTO.class) )
			.list();

		assertEquals(2, resultWithAliasedBean.size());

		StudentDTO dto = (StudentDTO) resultWithAliasedBean.get(0);
		assertNotNull(dto.getDescription());
		assertNotNull(dto.getName());

		CourseMeeting courseMeetingDto = ( CourseMeeting ) s.createCriteria(CourseMeeting.class)
			.setProjection( Projections.projectionList()
					.add( Property.forName("id").as("id") )
					.add( Property.forName("course").as("course") )
			)
			.addOrder( Order.desc("id") )
			.setResultTransformer( Transformers.aliasToBean(CourseMeeting.class) )
			.uniqueResult();

		assertNotNull( courseMeetingDto.getId() );
		assertEquals( course.getCourseCode(), courseMeetingDto.getId().getCourseCode() );
		assertEquals( "Monday", courseMeetingDto.getId().getDay() );
		assertEquals( "1313 Mockingbird Lane", courseMeetingDto.getId().getLocation() );
		assertEquals( 1, courseMeetingDto.getId().getPeriod() );
		assertEquals( course.getDescription(), courseMeetingDto.getCourse().getDescription() );

		s.createCriteria(Student.class)
			.add( Restrictions.like("name", "Gavin", MatchMode.START) )
			.addOrder( Order.asc("name") )
			.createCriteria("enrolments", "e")
				.addOrder( Order.desc("year") )
				.addOrder( Order.desc("semester") )
			.createCriteria("course","c")
				.addOrder( Order.asc("description") )
				.setProjection( Projections.projectionList()
					.add( Property.forName("this.name") )
					.add( Property.forName("e.year") )
					.add( Property.forName("e.semester") )
					.add( Property.forName("c.courseCode") )
					.add( Property.forName("c.description") )
				)
			.uniqueResult();

		Projection p1 = Projections.projectionList()
			.add( Property.forName("studentNumber").count() )
			.add( Property.forName("studentNumber").max() )
			.add( Projections.rowCount() );

		Projection p2 = Projections.projectionList()
			.add( Property.forName("studentNumber").min() )
			.add( Property.forName("studentNumber").avg() )
			.add( Projections.sqlProjection(
					"1 as constOne, count(*) as countStar",
					new String[] { "constOne", "countStar" },
					new Type[] { StandardBasicTypes.INTEGER, StandardBasicTypes.INTEGER }
			) );

		Object[] array = (Object[]) s.createCriteria(Enrolment.class)
			.setProjection( Projections.projectionList().add(p1).add(p2) )
			.uniqueResult();

		assertEquals( array.length, 7 );

		List list = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Property.forName("co.courseCode").group() )
					.add( Property.forName("st.studentNumber").count().setDistinct() )
					.add( Property.forName("year").group() )
			)
			.list();

		assertEquals( list.size(), 2 );

		list = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Property.forName("co.courseCode").group().as( "courseCode" ))
					.add( Property.forName("st.studentNumber").count().setDistinct().as( "studentNumber" ))
					.add( Property.forName("year").group())
			)
			.addOrder( Order.asc( "courseCode" ) )
			.addOrder( Order.asc( "studentNumber" ) )
			.list();

		assertEquals( list.size(), 2 );

		list = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Property.forName("co.courseCode").group().as( "cCode" ))
					.add( Property.forName("st.studentNumber").count().setDistinct().as( "stNumber" ))
					.add( Property.forName("year").group())
			)
			.addOrder( Order.asc( "cCode" ) )
			.addOrder( Order.asc( "stNumber" ) )
			.list();

		assertEquals( list.size(), 2 );

		s.delete(gavin);
		s.delete(xam);
		s.delete(course);

		t.commit();
		s.close();
	}

	@Test
	public void testDistinctProjectionsOfComponents() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		gavin.setCityState( new CityState( "Odessa", "WA" ) );
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		xam.setPreferredCourse( course );
		xam.setCityState( new CityState( "Odessa", "WA" ) );
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);

		s.flush();

		Object result = s.createCriteria( Student.class )
			.setProjection( Projections.distinct( Property.forName( "cityState" ) ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class )
			.setProjection( Projections.distinct( Property.forName( "cityState" ).as( "cityState" ) ) )
				.addOrder( Order.asc( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class )
			.setProjection( Projections.count( "cityState.city" ) )
			.uniqueResult();
		assertEquals( 2, ( ( Long ) result ).longValue() );

		result = s.createCriteria( Student.class )
			.setProjection( Projections.countDistinct( "cityState.city" ) )
			.uniqueResult();
		assertEquals( 1, ( ( Long ) result ).longValue() );
		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();
		try {
			result = s.createCriteria( Student.class )
				.setProjection( Projections.count( "cityState" ) )
				.uniqueResult();
			if ( ! getDialect().supportsTupleCounts() ) {
				fail( "expected SQLGrammarException" );
			}
			assertEquals( 1, ( ( Long ) result ).longValue() );
		}
		catch ( SQLGrammarException ex ) {
			if ( ! getDialect().supportsTupleCounts() ) {
				// expected
			}
			else {
				throw ex;
			}
		}
		finally {
			t.rollback();
			s.close();
		}

		s = openSession();
		t = s.beginTransaction();
		try {
			result = s.createCriteria( Student.class )
					.setProjection( Projections.countDistinct( "cityState" ) )
					.uniqueResult();
			if ( ! getDialect().supportsTupleDistinctCounts() ) {
				fail( "expected SQLGrammarException" );
			}
			assertEquals( 1, ( ( Long ) result ).longValue() );
		}
		catch ( SQLGrammarException ex ) {
			if ( ! getDialect().supportsTupleDistinctCounts() ) {
				// expected
			}
			else {
				throw ex;
			}
		}
		finally {
			t.rollback();
			s.close();
		}

		s = openSession();
		t = s.beginTransaction();
		s.delete(gavin);
		s.delete(xam);
		s.delete(course);

		t.commit();
		s.close();
	}

	@Test
	public void testGroupByComponent() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		gavin.setCityState( new CityState( "Odessa", "WA" ) );
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		xam.setPreferredCourse( course );
		xam.setCityState( new CityState( "Odessa", "WA" ) );
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);

		s.flush();

		Object result = s.createCriteria( Student.class )
			.setProjection( Projections.groupProperty( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class, "st")
			.setProjection( Projections.groupProperty( "st.cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class, "st")
			.setProjection( Projections.groupProperty( "st.cityState" ) )
				.addOrder( Order.asc( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class, "st")
			.setProjection( Projections.groupProperty( "st.cityState" ).as( "cityState" ) )
				.addOrder( Order.asc( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class, "st")
			.setProjection( Projections.groupProperty( "st.cityState" ).as( "cityState" ) )
				.addOrder( Order.asc( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		result = s.createCriteria( Student.class, "st")
			.setProjection( Projections.groupProperty( "st.cityState" ).as( "cityState" ) )
			.add( Restrictions.eq( "st.cityState", new CityState( "Odessa", "WA" ) ) )
			.addOrder( Order.asc( "cityState" ) )
			.uniqueResult();
		assertTrue( result instanceof CityState );
		assertEquals( ( ( CityState ) result ).getCity(), "Odessa" );
		assertEquals( ( ( CityState ) result ).getState(), "WA" );

		List list = s.createCriteria(Enrolment.class)
			.createAlias("student", "st")
			.createAlias("course", "co")
			.setProjection( Projections.projectionList()
					.add( Property.forName("co.courseCode").group() )
					.add( Property.forName("st.cityState").group() )
					.add( Property.forName("year").group() )
			)
			.list();


		s.delete(gavin);
		s.delete(xam);
		s.delete(course);

		t.commit();
		s.close();
	}

	@Test
	public void testRestrictionOnSubclassCollection() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		s.createCriteria( Reptile.class )
				.add( Restrictions.isEmpty( "offspring" ) )
				.list();

		s.createCriteria( Reptile.class )
				.add( Restrictions.isNotEmpty( "offspring" ) )
				.list();

		t.rollback();
		s.close();
	}

	@Test
	public void testClassProperty() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		// HQL: from Animal a where a.mother.class = Reptile
		Criteria c = s.createCriteria(Animal.class,"a")
			.createAlias("mother","m")
			.add( Property.forName("m.class").eq(Reptile.class) );
		c.list();
		t.rollback();
		s.close();
	}

	@Test
	public void testClassProperty2() {
		Session session = openSession();
		Transaction t = session.beginTransaction();
		GreatFoo foo = new GreatFoo();
		Bar b = new Bar();
		b.setMyFoo(foo);
		foo.setId(1);
		b.setId(1);
		session.persist(b);
		session.flush();
		t.commit();
		session=openSession();
		t=session.beginTransaction();
		// OK, one BAR in DB
		assertEquals(1, session.createCriteria(Bar.class).list().size());
		Criteria crit = session.createCriteria(Bar.class, "b").createAlias(
				"myFoo", "m").add(
				Property.forName("m.class").eq(GreatFoo.class));
		assertEquals(1, crit.list().size());
		crit = session.createCriteria(Bar.class, "b").createAlias("myFoo", "m")
				.add(Restrictions.eq("m.class", GreatFoo.class));
		assertEquals(1, crit.list().size());
		t.commit();
		session.close();
	}

	@Test
	public void testProjectedId() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		s.createCriteria(Course.class).setProjection( Projections.property("courseCode") ).list();
		s.createCriteria(Course.class).setProjection( Projections.id() ).list();
		t.rollback();
		s.close();
	}

	@Test
	public void testProjectedEmbeddedCompositeId() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);

		s.flush();

		List enrolments = ( List ) s.createCriteria( Enrolment.class).setProjection( Projections.id() ).list();
		t.rollback();
		s.close();
	}

	@Test
	public void testProjectedCompositeId() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		course.getCourseMeetings().add( new CourseMeeting( course, "Monday", 1, "1313 Mockingbird Lane" ) );
		s.save(course);
		s.flush();
		s.clear();
		List data = ( List ) s.createCriteria( CourseMeeting.class).setProjection( Projections.id() ).list();
		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();
		try {
			s.createCriteria( CourseMeeting.class).setProjection( Projections.count( "id" ) ).list();
			fail( "should have thrown SQLGrammarException" );
		}
		catch ( SQLGrammarException ex ) {
			// expected
		}
		finally {
			t.rollback();
			s.close();
		}

		s = openSession();
		t = s.beginTransaction();
		try {
			s.createCriteria( CourseMeeting.class).setProjection( Projections.countDistinct( "id" ) ).list();
			if ( ! getDialect().supportsTupleDistinctCounts() ) {
				fail( "expected SQLGrammarException" );
			}
		}
		catch ( SQLGrammarException ex ) {
			if ( ! getDialect().supportsTupleDistinctCounts() ) {
				// expected
			}
			else {
				throw ex;
			}
		}
		finally {
			t.rollback();
			s.close();
		}

		s = openSession();
		t = s.beginTransaction();
		s.delete( course );
		t.commit();
		s.close();
	}

	@Test
	public void testProjectedCompositeIdWithAlias() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		course.getCourseMeetings().add( new CourseMeeting( course, "Monday", 1, "1313 Mockingbird Lane" ) );
		s.save(course);
		s.flush();

		List data = ( List ) s.createCriteria( CourseMeeting.class).setProjection( Projections.id().as( "id" ) ).list();
		t.rollback();
		s.close();
	}

	@Test
	public void testProjectedComponent() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Student gaith = new Student();
		gaith.setName("Gaith Bell");
		gaith.setStudentNumber(123);
		gaith.setCityState( new CityState( "Chicago", "Illinois" ) );
		s.save( gaith );
		s.flush();

		List cityStates = ( List ) s.createCriteria( Student.class).setProjection( Projections.property( "cityState" )).list();
		t.rollback();
		s.close();
	}

	@Test
	public void testProjectedListIncludesComponent() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Student gaith = new Student();
		gaith.setName("Gaith Bell");
		gaith.setStudentNumber(123);
		gaith.setCityState( new CityState( "Chicago", "Illinois" ) );
		s.save(gaith);
		s.flush();
		List data = ( List ) s.createCriteria( Student.class)
				.setProjection( Projections.projectionList()
					.add( Projections.property( "cityState" ) )
					.add( Projections.property("name") ) )
				.list();
		t.rollback();
		s.close();
	}

	@Test
	public void testProjectedListIncludesEmbeddedCompositeId() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		s.save(course);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(667);
		s.save(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);
		s.save(xam);

		Enrolment enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 1);
		enrolment.setYear((short) 1999);
		enrolment.setStudent(xam);
		enrolment.setStudentNumber(xam.getStudentNumber());
		xam.getEnrolments().add(enrolment);
		s.save(enrolment);

		enrolment = new Enrolment();
		enrolment.setCourse(course);
		enrolment.setCourseCode(course.getCourseCode());
		enrolment.setSemester((short) 3);
		enrolment.setYear((short) 1998);
		enrolment.setStudent(gavin);
		enrolment.setStudentNumber(gavin.getStudentNumber());
		gavin.getEnrolments().add(enrolment);
		s.save(enrolment);
		s.flush();
		List data = ( List ) s.createCriteria( Enrolment.class)
				.setProjection( Projections.projectionList()
					.add( Projections.property( "semester" ) )
					.add( Projections.property("year") )
					.add( Projections.id() ) )
				.list();
		t.rollback();
		s.close();
	}

	@Test
	public void testSubcriteriaJoinTypes() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course courseA = new Course();
		courseA.setCourseCode("HIB-A");
		courseA.setDescription("Hibernate Training A");
		session.persist(courseA);

		Course courseB = new Course();
		courseB.setCourseCode("HIB-B");
		courseB.setDescription("Hibernate Training B");
		session.persist(courseB);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);
		gavin.setPreferredCourse(courseA);
		session.persist(gavin);

		Student leonardo = new Student();
		leonardo.setName("Leonardo Quijano");
		leonardo.setStudentNumber(233);
		leonardo.setPreferredCourse(courseB);
		session.persist(leonardo);

		Student johnDoe = new Student();
		johnDoe.setName("John Doe");
		johnDoe.setStudentNumber(235);
		johnDoe.setPreferredCourse(null);
		session.persist(johnDoe);

		List result = session.createCriteria( Student.class )
				.setProjection( Property.forName("preferredCourse.courseCode") )
				.createCriteria( "preferredCourse", Criteria.LEFT_JOIN )
						.addOrder( Order.asc( "courseCode" ) )
						.list();
		assertEquals( 3, result.size() );
		// can't be sure of NULL comparison ordering aside from they should
		// either come first or last
		if ( result.get( 0 ) == null ) {
			assertEquals( "HIB-A", result.get(1) );
			assertEquals( "HIB-B", result.get(2) );
		}
		else {
			assertNull( result.get(2) );
			assertEquals( "HIB-A", result.get(0) );
			assertEquals( "HIB-B", result.get(1) );
		}

		result = session.createCriteria( Student.class )
				.setFetchMode( "preferredCourse", FetchMode.JOIN )
				.createCriteria( "preferredCourse", Criteria.LEFT_JOIN )
						.addOrder( Order.asc( "courseCode" ) )
						.list();
		assertEquals( 3, result.size() );
		assertNotNull( result.get(0) );
		assertNotNull( result.get(1) );
		assertNotNull( result.get(2) );

		result = session.createCriteria( Student.class )
				.setFetchMode( "preferredCourse", FetchMode.JOIN )
				.createAlias( "preferredCourse", "pc", Criteria.LEFT_JOIN )
				.addOrder( Order.asc( "pc.courseCode" ) )
				.list();
		assertEquals( 3, result.size() );
		assertNotNull( result.get(0) );
		assertNotNull( result.get(1) );
		assertNotNull( result.get(2) );

		session.delete(gavin);
		session.delete(leonardo);
		session.delete(johnDoe);
		session.delete(courseA);
		session.delete(courseB);
		t.commit();
		session.close();
	}
	
	@Test
	public void testAliasJoinCriterion() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course courseA = new Course();
		courseA.setCourseCode("HIB-A");
		courseA.setDescription("Hibernate Training A");
		session.persist(courseA);

		Course courseB = new Course();
		courseB.setCourseCode("HIB-B");
		courseB.setDescription("Hibernate Training B");
		session.persist(courseB);

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);
		gavin.setPreferredCourse(courseA);
		session.persist(gavin);

		Student leonardo = new Student();
		leonardo.setName("Leonardo Quijano");
		leonardo.setStudentNumber(233);
		leonardo.setPreferredCourse(courseB);
		session.persist(leonardo);

		Student johnDoe = new Student();
		johnDoe.setName("John Doe");
		johnDoe.setStudentNumber(235);
		johnDoe.setPreferredCourse(null);
		session.persist(johnDoe);

		// test == on one value exists
		List result = session.createCriteria( Student.class )
			.createAlias( "preferredCourse", "pc", Criteria.LEFT_JOIN, Restrictions.eq("pc.courseCode", "HIB-A") )
			.setProjection( Property.forName("pc.courseCode") )
			.addOrder(Order.asc("pc.courseCode"))
			.list();

		assertEquals( 3, result.size() );

		// can't be sure of NULL comparison ordering aside from they should
		// either come first or last
		if ( result.get( 0 ) == null ) {
			assertNull(result.get(1));
			assertEquals( "HIB-A", result.get(2) );
		}
		else {
			assertNull( result.get(2) );
			assertNull( result.get(1) );
			assertEquals( "HIB-A", result.get(0) );
		}

		// test == on non existent value
		result = session.createCriteria( Student.class )
		.createAlias( "preferredCourse", "pc", Criteria.LEFT_JOIN, Restrictions.eq("pc.courseCode", "HIB-R") )
		.setProjection( Property.forName("pc.courseCode") )
		.addOrder(Order.asc("pc.courseCode"))
		.list();

		assertEquals( 3, result.size() );
		assertNull( result.get(2) );
		assertNull( result.get(1) );
		assertNull(result.get(0) );

		// test != on one existing value
		result = session.createCriteria( Student.class )
		.createAlias( "preferredCourse", "pc", Criteria.LEFT_JOIN, Restrictions.ne("pc.courseCode", "HIB-A") )
		.setProjection( Property.forName("pc.courseCode") )
		.addOrder(Order.asc("pc.courseCode"))
		.list();

		assertEquals( 3, result.size() );
		// can't be sure of NULL comparison ordering aside from they should
		// either come first or last
		if ( result.get( 0 ) == null ) {
			assertNull( result.get(1) );
			assertEquals( "HIB-B", result.get(2) );
		}
		else {
			assertEquals( "HIB-B", result.get(0) );
			assertNull( result.get(1) );
			assertNull( result.get(2) );
		}

		session.delete(gavin);
		session.delete(leonardo);
		session.delete(johnDoe);
		session.delete(courseA);
		session.delete(courseB);
		t.commit();
		session.close();
	}

        @Test
	public void testCriteriaCollectionOfValue() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Course course = new Course();
		course.setCourseCode("HIB");
		course.setDescription("Hibernate Training");
		Set crossListedAs = new HashSet();
		crossListedAs.add("Java Persistence 101");
		crossListedAs.add("CS101");
		course.setCrossListedAs(crossListedAs);
		session.persist(course);
		session.flush();
		session.clear();
		List results = session.createCriteria(Course.class)
		    .createCriteria("crossListedAs")
		    .add(Restrictions.eq("elements", "CS101"))
		    .list();

		assertEquals( 1, results.size() );
		course = (Course)results.get(0);
		assertEquals( 2, course.getCrossListedAs().size() );

		session.delete(course);
		
		t.commit();
		session.close();
		
	}

        @Test
	public void testCriteriaCollectionOfComponent() {
		Session session = openSession();
		Transaction t = session.beginTransaction();

		Student gavin = new Student();
		gavin.setName("Gavin King");
		gavin.setStudentNumber(232);

		Map addresses = new HashMap();
		StudentAddress addr = new StudentAddress();
		addr.setLine1("101 Main St.");
		addr.setCity("Anytown");
		addr.setState("NY");
		addr.setZip("10016");
		addresses.put("HOME", addr);
		
		addr = new StudentAddress();
		addr.setLine1("202 Spring St.");
		addr.setCity("Springfield");
		addr.setState("MA");
		addr.setZip("99999");
		addresses.put("SCHOOL", addr);
	       
		gavin.setAddresses(addresses);
		session.persist(gavin);

		Student xam = new Student();
		xam.setName("Max Rydahl Andersen");
		xam.setStudentNumber(101);

		addresses = new HashMap();
		addr = new StudentAddress();
		addr.setLine1("123 3rd Ave");
		addr.setCity("New York");
		addr.setState("NY");
		addr.setZip("10004");
		addresses.put("HOME", addr);

		xam.setAddresses(addresses);
		session.persist(xam);

		session.flush();
		session.clear();

		// search on a component property
		List results = session.createCriteria(Student.class)
		    .createCriteria("addresses")
		    .add(Restrictions.eq("state", "MA"))
		    .list();

		assertEquals(1, results.size());

		gavin = (Student)results.get(0);
		assertEquals(2, gavin.getAddresses().keySet().size());

		session.delete(gavin);
		session.delete(xam);
		
		t.commit();
		session.close();
		
	}
}