Hibernate example source code file (PredicateTest.java)

This example Hibernate source code file (PredicateTest.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

abstractmetamodelspecifictest, criteriabuilder, criteriaquery, criteriaquery, entitymanager, entitymanager, list, order, path, predicate, predicate, root, test, test, util

The Hibernate PredicateTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.ejb.criteria.basic;

import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.List;

import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.ejb.metamodel.Customer_;
import org.hibernate.ejb.metamodel.Order;
import org.hibernate.ejb.metamodel.Order_;

import org.junit.Before;
import org.junit.Test;

import org.hibernate.testing.TestForIssue;

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

/**
 * Test the various predicates.
 *
 * @author Steve Ebersole
 * @author Hardy Ferentschik
 */
public class PredicateTest extends AbstractMetamodelSpecificTest {
	private CriteriaBuilder builder;

	@Before
	public void prepareTestData() {
		builder = entityManagerFactory().getCriteriaBuilder();

		EntityManager em = entityManagerFactory().createEntityManager();
		em.getTransaction().begin();
		em.persist( new Order( "order-1", 1.0d ) );
		em.persist( new Order( "order-2", 10.0d ) );
		em.persist( new Order( "order-3", new char[]{'r','u'} ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testEmptyConjunction() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		// yes this is a retarded case, but explicitly allowed in the JPA spec
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );
		orderCriteria.select( orderRoot );
		orderCriteria.where( builder.isTrue( builder.conjunction() ) );
		em.createQuery( orderCriteria ).getResultList();

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 3 );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testEmptyDisjunction() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		// yes this is a retarded case, but explicitly allowed in the JPA spec
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );
		orderCriteria.select( orderRoot );
		orderCriteria.where( builder.isFalse( builder.disjunction() ) );
		em.createQuery( orderCriteria ).getResultList();

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 3 );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check simple not.
	 */
	@Test
	public void testSimpleNot() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );

		orderCriteria.select( orderRoot );
		orderCriteria.where( builder.not( builder.equal( orderRoot.get( "id" ), "order-1" ) ) );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 2 );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check complicated not.
	 */
	@Test
	public void testComplicatedNotOr() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );

		orderCriteria.select( orderRoot );
		Predicate p1 = builder.equal( orderRoot.get( "id" ), "order-1" );
		Predicate p2 = builder.equal( orderRoot.get( "id" ), "order-2" );
		orderCriteria.where( builder.not( builder.or( p1, p2 ) ) );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 1 );
		Order order = orders.get( 0 );
		assertEquals( "order-3", order.getId() );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check complicated not.
	 */
	@Test
	public void testNotMultipleOr() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );

		orderCriteria.select( orderRoot );
		Predicate p1 = builder.equal( orderRoot.get( "id" ), "order-1" );
		Predicate p2 = builder.equal( orderRoot.get( "id" ), "order-2" );
		Predicate p3 = builder.equal( orderRoot.get( "id" ), "order-3" );
		orderCriteria.where( builder.not( builder.or( p1, p2, p3 ) ) );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 0 );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check complicated not.
	 */
	@Test
	public void testComplicatedNotAnd() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );

		orderCriteria.select( orderRoot );
		Predicate p1 = builder.equal( orderRoot.get( "id" ), "order-1" );
		Predicate p2 = builder.equal( orderRoot.get( "id" ), "order-2" );
		orderCriteria.where( builder.not( builder.and( p1, p2 ) ) );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 3 );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check predicate for field which has simple char array type (char[]).
	 */
	@Test
	public void testCharArray() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );
		
		orderCriteria.select( orderRoot );
		Predicate p = builder.equal( orderRoot.get( "domen" ), new char[]{'r','u'} );
		orderCriteria.where( p );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 1 );
		em.getTransaction().commit();
		em.close();
	}

	/**
	 * Check predicate for field which has simple char array type (byte[]).
	 */
	@Test
	public void testByteArray() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );
		
		orderCriteria.select( orderRoot );
		Predicate p = builder.equal( orderRoot.get( "number" ), new byte[]{'1','2'} );
		orderCriteria.where( p );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 0 );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	@TestForIssue( jiraKey = "HHH-5803" )
	public void testQuotientConversion() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		CriteriaQuery<Order> orderCriteria = builder.createQuery( Order.class );
		Root<Order> orderRoot = orderCriteria.from( Order.class );

		Long longValue = 999999999L;
		Path<Double> doublePath = orderRoot.get( Order_.totalPrice );
		Path<Integer> integerPath = orderRoot.get( Order_.customer ).get( Customer_.age );

		orderCriteria.select( orderRoot );
		Predicate p = builder.ge(
				builder.quot( integerPath, doublePath ),
				longValue
		);
		orderCriteria.where( p );

		List<Order> orders = em.createQuery( orderCriteria ).getResultList();
		assertTrue( orders.size() == 0 );
		em.getTransaction().commit();
		em.close();
	}

}