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Hibernate example source code file (MultiPathCircleCascadeTest.java)

This example Hibernate source code file (MultiPathCircleCascadeTest.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

exception, iterator, node, node, route, route, session, session, sessionimplementor, string, test, tour, transport, transport, util

The Hibernate MultiPathCircleCascadeTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, 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.cascade.circle;

import java.util.Iterator;

import org.hibernate.JDBCException;
import org.hibernate.PropertyValueException;
import org.hibernate.Session;
import org.hibernate.TransientObjectException;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.engine.spi.SessionImplementor;

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.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * The test case uses the following model:
 *
 *                          <-    ->
 *                      -- (N : 0,1) -- Tour
 *                      |    <-   ->
 *                      | -- (1 : N) -- (pickup) ----
 *               ->     | |                          |
 * Route -- (1 : N) -- Node                      Transport
 *                      |  <-   ->                |
 *                      -- (1 : N) -- (delivery) --
 *
 *  Arrows indicate the direction of cascade-merge.
 *
 * It reproduced the following issues:
 * http://opensource.atlassian.com/projects/hibernate/browse/HHH-3046
 * http://opensource.atlassian.com/projects/hibernate/browse/HHH-3810
 * <p/>
 * This tests that merge is cascaded properly from each entity.
 *
 * @author Pavol Zibrita, Gail Badner
 */
public class MultiPathCircleCascadeTest extends BaseCoreFunctionalTestCase {
	@Override
	public void configure(Configuration cfg) {
		cfg.setProperty( Environment.GENERATE_STATISTICS, "true" );
		cfg.setProperty( Environment.STATEMENT_BATCH_SIZE, "0" );
	}

	@Override
	public String[] getMappings() {
		return new String[] {
				"cascade/circle/MultiPathCircleCascade.hbm.xml"
		};
	}

	protected void cleanupTest() {
		Session s = openSession();
		s.beginTransaction();
		s.createQuery( "delete from Transport" );
		s.createQuery( "delete from Tour" );
		s.createQuery( "delete from Node" );
		s.createQuery( "delete from Route" );
	}

	@Test
	public void testMergeEntityWithNonNullableTransientEntity() {
		Route route = getUpdatedDetachedEntity();

		Node node = (Node) route.getNodes().iterator().next();
		route.getNodes().remove( node );

		Route routeNew = new Route();
		routeNew.setName( "new route" );
		routeNew.getNodes().add( node );
		node.setRoute( routeNew );

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

		try {
			s.merge( node );
			s.getTransaction().commit();
			fail( "should have thrown an exception" );
		}
		catch (Exception ex) {
			checkExceptionFromNullValueForNonNullable(
					ex,
					((SessionImplementor) s).getFactory().getSettings().isCheckNullability(),
					false
			);
		}
		finally {
			s.getTransaction().rollback();
			s.close();
		}
	}

	@Test
	public void testMergeEntityWithNonNullableEntityNull() {
		Route route = getUpdatedDetachedEntity();

		Node node = (Node) route.getNodes().iterator().next();
		route.getNodes().remove( node );
		node.setRoute( null );

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

		try {
			s.merge( node );
			s.getTransaction().commit();
			fail( "should have thrown an exception" );
		}
		catch (Exception ex) {
			checkExceptionFromNullValueForNonNullable(
					ex,
					((SessionImplementor) s).getFactory().getSettings().isCheckNullability(),
					true
			);
		}
		finally {
			s.getTransaction().rollback();
			s.close();
		}
	}

	@Test
	public void testMergeEntityWithNonNullablePropSetToNull() {
		Route route = getUpdatedDetachedEntity();
		Node node = (Node) route.getNodes().iterator().next();
		node.setName( null );

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

		try {
			s.merge( route );
			s.getTransaction().commit();
			fail( "should have thrown an exception" );
		}
		catch (Exception ex) {
			checkExceptionFromNullValueForNonNullable(
					ex,
					((SessionImplementor) s).getFactory().getSettings().isCheckNullability(),
					true
			);
		}
		finally {
			s.getTransaction().rollback();
			s.close();
		}
	}

	@Test
	public void testMergeRoute() {

		Route route = getUpdatedDetachedEntity();

		clearCounts();

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

		s.merge( route );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 4 );
		assertUpdateCount( 1 );

		s = openSession();
		s.beginTransaction();
		route = (Route) s.get( Route.class, route.getRouteID() );
		checkResults( route, true );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testMergePickupNode() {

		Route route = getUpdatedDetachedEntity();

		clearCounts();

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

		Iterator it = route.getNodes().iterator();
		Node node = (Node) it.next();
		Node pickupNode;
		if ( node.getName().equals( "pickupNodeB" ) ) {
			pickupNode = node;
		}
		else {
			node = (Node) it.next();
			assertEquals( "pickupNodeB", node.getName() );
			pickupNode = node;
		}

		pickupNode = (Node) s.merge( pickupNode );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 4 );
		assertUpdateCount( 0 );

		s = openSession();
		s.beginTransaction();
		route = (Route) s.get( Route.class, route.getRouteID() );
		checkResults( route, false );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testMergeDeliveryNode() {

		Route route = getUpdatedDetachedEntity();

		clearCounts();

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

		Iterator it = route.getNodes().iterator();
		Node node = (Node) it.next();
		Node deliveryNode;
		if ( node.getName().equals( "deliveryNodeB" ) ) {
			deliveryNode = node;
		}
		else {
			node = (Node) it.next();
			assertEquals( "deliveryNodeB", node.getName() );
			deliveryNode = node;
		}

		deliveryNode = (Node) s.merge( deliveryNode );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 4 );
		assertUpdateCount( 0 );

		s = openSession();
		s.beginTransaction();
		route = (Route) s.get( Route.class, route.getRouteID() );
		checkResults( route, false );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testMergeTour() {

		Route route = getUpdatedDetachedEntity();

		clearCounts();

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

		Tour tour = (Tour) s.merge( ((Node) route.getNodes().toArray()[0]).getTour() );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 4 );
		assertUpdateCount( 0 );

		s = openSession();
		s.beginTransaction();
		route = (Route) s.get( Route.class, route.getRouteID() );
		checkResults( route, false );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testMergeTransport() {

		Route route = getUpdatedDetachedEntity();

		clearCounts();

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

		Node node = ((Node) route.getNodes().toArray()[0]);
		Transport transport;
		if ( node.getPickupTransports().size() == 1 ) {
			transport = (Transport) node.getPickupTransports().toArray()[0];
		}
		else {
			transport = (Transport) node.getDeliveryTransports().toArray()[0];
		}

		transport = (Transport) s.merge( transport );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 4 );
		assertUpdateCount( 0 );

		s = openSession();
		s.beginTransaction();
		route = (Route) s.get( Route.class, route.getRouteID() );
		checkResults( route, false );
		s.getTransaction().commit();
		s.close();
	}

	private Route getUpdatedDetachedEntity() {

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

		Route route = new Route();
		route.setName( "routeA" );

		s.save( route );
		s.getTransaction().commit();
		s.close();

		route.setName( "new routeA" );
		route.setTransientField( new String( "sfnaouisrbn" ) );

		Tour tour = new Tour();
		tour.setName( "tourB" );

		Transport transport = new Transport();
		transport.setName( "transportB" );

		Node pickupNode = new Node();
		pickupNode.setName( "pickupNodeB" );

		Node deliveryNode = new Node();
		deliveryNode.setName( "deliveryNodeB" );

		pickupNode.setRoute( route );
		pickupNode.setTour( tour );
		pickupNode.getPickupTransports().add( transport );
		pickupNode.setTransientField( "pickup node aaaaaaaaaaa" );

		deliveryNode.setRoute( route );
		deliveryNode.setTour( tour );
		deliveryNode.getDeliveryTransports().add( transport );
		deliveryNode.setTransientField( "delivery node aaaaaaaaa" );

		tour.getNodes().add( pickupNode );
		tour.getNodes().add( deliveryNode );

		route.getNodes().add( pickupNode );
		route.getNodes().add( deliveryNode );

		transport.setPickupNode( pickupNode );
		transport.setDeliveryNode( deliveryNode );
		transport.setTransientField( "aaaaaaaaaaaaaa" );

		return route;
	}

	private void checkResults(Route route, boolean isRouteUpdated) {
		// since merge is not cascaded to route, this method needs to
		// know whether route is expected to be updated
		if ( isRouteUpdated ) {
			assertEquals( "new routeA", route.getName() );
		}
		assertEquals( 2, route.getNodes().size() );
		Node deliveryNode = null;
		Node pickupNode = null;
		for ( Iterator it = route.getNodes().iterator(); it.hasNext(); ) {
			Node node = (Node) it.next();
			if ( "deliveryNodeB".equals( node.getName() ) ) {
				deliveryNode = node;
			}
			else if ( "pickupNodeB".equals( node.getName() ) ) {
				pickupNode = node;
			}
			else {
				fail( "unknown node" );
			}
		}
		assertNotNull( deliveryNode );
		assertSame( route, deliveryNode.getRoute() );
		assertEquals( 1, deliveryNode.getDeliveryTransports().size() );
		assertEquals( 0, deliveryNode.getPickupTransports().size() );
		assertNotNull( deliveryNode.getTour() );
		assertEquals( "node original value", deliveryNode.getTransientField() );

		assertNotNull( pickupNode );
		assertSame( route, pickupNode.getRoute() );
		assertEquals( 0, pickupNode.getDeliveryTransports().size() );
		assertEquals( 1, pickupNode.getPickupTransports().size() );
		assertNotNull( pickupNode.getTour() );
		assertEquals( "node original value", pickupNode.getTransientField() );

		assertTrue( !deliveryNode.getNodeID().equals( pickupNode.getNodeID() ) );
		assertSame( deliveryNode.getTour(), pickupNode.getTour() );
		assertSame(
				deliveryNode.getDeliveryTransports().iterator().next(),
				pickupNode.getPickupTransports().iterator().next()
		);

		Tour tour = deliveryNode.getTour();
		Transport transport = (Transport) deliveryNode.getDeliveryTransports().iterator().next();

		assertEquals( "tourB", tour.getName() );
		assertEquals( 2, tour.getNodes().size() );
		assertTrue( tour.getNodes().contains( deliveryNode ) );
		assertTrue( tour.getNodes().contains( pickupNode ) );

		assertEquals( "transportB", transport.getName() );
		assertSame( deliveryNode, transport.getDeliveryNode() );
		assertSame( pickupNode, transport.getPickupNode() );
		assertEquals( "transport original value", transport.getTransientField() );
	}

	@Test
	public void testMergeData3Nodes() {

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

		Route route = new Route();
		route.setName( "routeA" );

		s.save( route );
		s.getTransaction().commit();
		s.close();

		clearCounts();

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

		route = (Route) s.get( Route.class, new Long( 1 ) );
		//System.out.println(route);
		route.setName( "new routA" );

		route.setTransientField( new String( "sfnaouisrbn" ) );

		Tour tour = new Tour();
		tour.setName( "tourB" );

		Transport transport1 = new Transport();
		transport1.setName( "TRANSPORT1" );

		Transport transport2 = new Transport();
		transport2.setName( "TRANSPORT2" );

		Node node1 = new Node();
		node1.setName( "NODE1" );

		Node node2 = new Node();
		node2.setName( "NODE2" );

		Node node3 = new Node();
		node3.setName( "NODE3" );

		node1.setRoute( route );
		node1.setTour( tour );
		node1.getPickupTransports().add( transport1 );
		node1.setTransientField( "node 1" );

		node2.setRoute( route );
		node2.setTour( tour );
		node2.getDeliveryTransports().add( transport1 );
		node2.getPickupTransports().add( transport2 );
		node2.setTransientField( "node 2" );

		node3.setRoute( route );
		node3.setTour( tour );
		node3.getDeliveryTransports().add( transport2 );
		node3.setTransientField( "node 3" );

		tour.getNodes().add( node1 );
		tour.getNodes().add( node2 );
		tour.getNodes().add( node3 );

		route.getNodes().add( node1 );
		route.getNodes().add( node2 );
		route.getNodes().add( node3 );

		transport1.setPickupNode( node1 );
		transport1.setDeliveryNode( node2 );
		transport1.setTransientField( "aaaaaaaaaaaaaa" );

		transport2.setPickupNode( node2 );
		transport2.setDeliveryNode( node3 );
		transport2.setTransientField( "bbbbbbbbbbbbb" );

		Route mergedRoute = (Route) s.merge( route );

		s.getTransaction().commit();
		s.close();

		assertInsertCount( 6 );
		assertUpdateCount( 1 );
	}

	protected void checkExceptionFromNullValueForNonNullable(
			Exception ex, boolean checkNullability, boolean isNullValue
	) {
		if ( checkNullability ) {
			if ( isNullValue ) {
				assertTrue( ex instanceof PropertyValueException );
			}
			else {
				assertTrue( ex instanceof TransientObjectException );
			}
		}
		else {
			assertTrue( ex instanceof JDBCException );
		}
	}

	protected void clearCounts() {
		sessionFactory().getStatistics().clear();
	}

	protected void assertInsertCount(int expected) {
		int inserts = (int) sessionFactory().getStatistics().getEntityInsertCount();
		assertEquals( "unexpected insert count", expected, inserts );
	}

	protected void assertUpdateCount(int expected) {
		int updates = (int) sessionFactory().getStatistics().getEntityUpdateCount();
		assertEquals( "unexpected update counts", expected, updates );
	}

	protected void assertDeleteCount(int expected) {
		int deletes = (int) sessionFactory().getStatistics().getEntityDeleteCount();
		assertEquals( "unexpected delete counts", expected, deletes );
	}
}

Other Hibernate examples (source code examples)

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