package org.hibernate.test.keymanytoone.bidir.component;
import junit.framework.Test;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.event.LoadEvent;
import org.hibernate.event.LoadEventListener;
import org.hibernate.event.def.DefaultLoadEventListener;
import org.hibernate.junit.functional.FunctionalTestCase;
import org.hibernate.junit.functional.FunctionalTestClassTestSuite;
/**
* @author Steve Ebersole
*/
public class EagerKeyManyToOneTest extends FunctionalTestCase {
public EagerKeyManyToOneTest(String name) {
super( name );
}
public static Test suite() {
return new FunctionalTestClassTestSuite( EagerKeyManyToOneTest.class );
}
public String[] getMappings() {
return new String[] { "keymanytoone/bidir/component/EagerMapping.hbm.xml" };
}
public void configure(Configuration cfg) {
super.configure( cfg );
cfg.setProperty( Environment.GENERATE_STATISTICS, "true" );
LoadEventListener[] baseListeners = cfg.getEventListeners().getLoadEventListeners();
int baseLength = baseListeners.length;
LoadEventListener[] expandedListeners = new LoadEventListener[ baseLength + 1 ];
expandedListeners[ 0 ] = new CustomLoadListener();
System.arraycopy( baseListeners, 0, expandedListeners, 1, baseLength );
cfg.getEventListeners().setLoadEventListeners( expandedListeners );
}
public void testSaveCascadedToKeyManyToOne() {
// test cascading a save to an association with a key-many-to-one which refers to a
// just saved entity
Session s = openSession();
s.beginTransaction();
Customer cust = new Customer( "Acme, Inc." );
Order order = new Order( new Order.Id( cust, 1 ) );
cust.getOrders().add( order );
s.save( cust );
s.flush();
assertEquals( 2, sfi().getStatistics().getEntityInsertCount() );
s.delete( cust );
s.getTransaction().commit();
s.close();
}
public void testLoadingStrategies() {
Session s = openSession();
s.beginTransaction();
Customer cust = new Customer( "Acme, Inc." );
Order order = new Order( new Order.Id( cust, 1 ) );
cust.getOrders().add( order );
s.save( cust );
s.getTransaction().commit();
s.close();
s = openSession();
s.beginTransaction();
// Here is an example of HHH-2277
// essentially we have a bidirectional association where one side of the
// association is actually part of a composite PK
//
// See #testLoadEntityWithEagerFetchingToKeyManyToOneReferenceBackToSelfFailureExpected() below...
//
// The way these are mapped causes the problem because both sides
// are defined as eager which leads to the infinite loop; if only
// one side is marked as eager, then all is ok...
// cust = ( Customer ) s.get( Customer.class, cust.getId() );
// assertEquals( 1, cust.getOrders().size() );
// s.clear();
cust = ( Customer ) s.createQuery( "from Customer" ).uniqueResult();
assertEquals( 1, cust.getOrders().size() );
s.clear();
cust = ( Customer ) s.createQuery( "from Customer c join fetch c.orders" ).uniqueResult();
assertEquals( 1, cust.getOrders().size() );
s.clear();
cust = ( Customer ) s.createQuery( "from Customer c join fetch c.orders as o join fetch o.id.customer" ).uniqueResult();
assertEquals( 1, cust.getOrders().size() );
s.clear();
cust = ( Customer ) s.createCriteria( Customer.class ).uniqueResult();
assertEquals( 1, cust.getOrders().size() );
s.clear();
s.delete( cust );
s.getTransaction().commit();
s.close();
}
public void testLoadEntityWithEagerFetchingToKeyManyToOneReferenceBackToSelfFailureExpected() {
// long winded method name to say that this is a test specifically for HHH-2277 ;)
// essentially we have a bidirectional association where one side of the
// association is actually part of a composite PK.
//
// The way these are mapped causes the problem because both sides
// are defined as eager which leads to the infinite loop; if only
// one side is marked as eager, then all is ok. In other words the
// problem arises when both pieces of instance data are coming from
// the same result set. This is because no "entry" can be placed
// into the persistence context for the association with the
// composite key because we are in the process of trying to build
// the composite-id instance
Session s = openSession();
s.beginTransaction();
Customer cust = new Customer( "Acme, Inc." );
Order order = new Order( new Order.Id( cust, 1 ) );
cust.getOrders().add( order );
s.save( cust );
s.getTransaction().commit();
s.close();
s = openSession();
s.beginTransaction();
try {
cust = ( Customer ) s.get( Customer.class, cust.getId() );
}
catch( OverflowCondition overflow ) {
fail( "get()/load() caused overflow condition" );
}
s.delete( cust );
s.getTransaction().commit();
s.close();
}
private static class OverflowCondition extends RuntimeException {
}
private static class CustomLoadListener extends DefaultLoadEventListener {
private int internalLoadCount = 0;
public void onLoad(LoadEvent event, LoadType loadType) throws HibernateException {
if ( LoadEventListener.INTERNAL_LOAD_EAGER.getName().equals( loadType.getName() ) ) {
internalLoadCount++;
if ( internalLoadCount > 10 ) {
throw new OverflowCondition();
}
}
super.onLoad( event, loadType );
internalLoadCount--;
}
}
}