Hibernate example source code file (SubselectTest.java)

This example Hibernate source code file (SubselectTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

alien, alien_inches, alien_inches, being, being, double, ga, human, human, human_inches, human_inches, mars, melbourne, session, util

The Hibernate SubselectTest.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
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.test.subselect;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;

import org.junit.Test;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

/**
 * @author Gavin King
 */
public class SubselectTest extends BaseCoreFunctionalTestCase {
	public String[] getMappings() {
		return new String[] { "subselect/Beings.hbm.xml" };
	}

	@Test
	@SuppressWarnings( {"unchecked"})
	public void testEntitySubselect() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		Human gavin = new Human();
		gavin.setName( "gavin" );
		gavin.setSex( 'M' );
		gavin.setAddress( "Melbourne, Australia" );
		Alien x23y4 = new Alien();
		x23y4.setIdentity( "x23y4$$hu%3" );
		x23y4.setPlanet( "Mars" );
		x23y4.setSpecies( "martian" );
		s.save(gavin);
		s.save(x23y4);
		s.flush();
		List<Being> beings = ( List) s.createQuery("from Being").list();
		for ( Being being : beings ) {
			assertNotNull( being.getLocation() );
			assertNotNull( being.getIdentity() );
			assertNotNull( being.getSpecies() );
		}
		s.clear();
		sessionFactory().getCache().evictEntityRegion( Being.class );
		Being gav = (Being) s.get(Being.class, gavin.getId());
		assertEquals( gav.getLocation(), gavin.getAddress() );
		assertEquals( gav.getSpecies(), "human" );
		assertEquals( gav.getIdentity(), gavin.getName() );
		s.clear();
		//test the <synchronized> tag:
		gavin = (Human) s.get(Human.class, gavin.getId());
		gavin.setAddress( "Atlanta, GA" );
		gav = (Being) s.createQuery("from Being b where b.location like '%GA%'").uniqueResult();
		assertEquals( gav.getLocation(), gavin.getAddress() );
		s.delete(gavin);
		s.delete(x23y4);
		assertTrue( s.createQuery("from Being").list().isEmpty() );
		t.commit();
		s.close();
	}

	@Test
	public void testCustomColumnReadAndWrite() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		final double HUMAN_INCHES = 73;
		final double ALIEN_INCHES = 931;
		final double HUMAN_CENTIMETERS = HUMAN_INCHES * 2.54d;		
		final double ALIEN_CENTIMETERS = ALIEN_INCHES * 2.54d;		
		Human gavin = new Human();
		gavin.setName( "gavin" );
		gavin.setSex( 'M' );
		gavin.setAddress( "Melbourne, Australia" );
		gavin.setHeightInches( HUMAN_INCHES );
		Alien x23y4 = new Alien();
		x23y4.setIdentity( "x23y4$$hu%3" );
		x23y4.setPlanet( "Mars" );
		x23y4.setSpecies( "martian" );
		x23y4.setHeightInches( ALIEN_INCHES );
		s.save(gavin);
		s.save(x23y4);
		s.flush();
		
		// Test value conversion during insert
		Double humanHeightViaSql = (Double)s.createSQLQuery("select height_centimeters from humans").uniqueResult();
		assertEquals(HUMAN_CENTIMETERS, humanHeightViaSql, 0.01d);
		Double alienHeightViaSql = (Double)s.createSQLQuery("select height_centimeters from aliens").uniqueResult();
		assertEquals(ALIEN_CENTIMETERS, alienHeightViaSql, 0.01d);
		s.clear();
		
		// Test projection
		Double heightViaHql = (Double)s.createQuery("select heightInches from Being b where b.identity = 'gavin'").uniqueResult();
		assertEquals(HUMAN_INCHES, heightViaHql, 0.01d);
		
		// Test restriction and entity load via criteria
		Being b = (Being)s.createCriteria(Being.class)
			.add(Restrictions.between("heightInches", HUMAN_INCHES - 0.01d, HUMAN_INCHES + 0.01d))
			.uniqueResult();
		assertEquals(HUMAN_INCHES, b.getHeightInches(), 0.01d);
		
		// Test predicate and entity load via HQL
		b = (Being)s.createQuery("from Being b where b.heightInches between ? and ?")
			.setDouble(0, ALIEN_INCHES - 0.01d)
			.setDouble(1, ALIEN_INCHES + 0.01d)
			.uniqueResult();
		assertEquals(ALIEN_INCHES, b.getHeightInches(), 0.01d);
                s.delete(gavin);
                s.delete(x23y4);		
		t.commit();
		s.close();
		
	}

}