Hibernate example source code file (TestManyToOneProxyExecutable.java)

This example Hibernate source code file (TestManyToOneProxyExecutable.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

abstractexecutable, abstractexecutable, entity, entity, session, session, testmanytooneproxyexecutable, transaction, transaction

The Hibernate TestManyToOneProxyExecutable.java source code

package org.hibernate.test.instrument.cases;
import junit.framework.Assert;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.test.instrument.domain.Entity;

/**
 *
 * @author Steve Ebersole
 */
public class TestManyToOneProxyExecutable extends AbstractExecutable {
	public void execute() {
		Session s = getFactory().openSession();
		Transaction t = s.beginTransaction();
		Entity root = new Entity( "root" );
		Entity child1 = new Entity( "child1" );
		Entity child2 = new Entity( "child2" );
		root.setChild( child1 );
		child1.setSibling( child2 );
		Entity gChild1 = new Entity( "grandchild 1" );
		Entity gChild2 = new Entity( "grandchild 2" );
		child1.setChild( gChild1 );
		gChild1.setSibling( gChild2 );
		s.save( root );
		t.commit();
		s.close();

		// NOTE : child is mapped with lazy="proxy"; sibling with lazy="no-proxy"...

		s = getFactory().openSession();
		t = s.beginTransaction();
		// load root
		root = ( Entity ) s.get( Entity.class, root.getId() );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "name" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "sibling" ) );
		Assert.assertTrue( Hibernate.isPropertyInitialized( root, "child" ) );

		// get a handle to the child1 proxy reference (and make certain that
		// this does not force the lazy properties of the root entity
		// to get initialized.
		child1 = root.getChild();
		Assert.assertFalse( Hibernate.isInitialized( child1 ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "name" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "sibling" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( child1, "name" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( child1, "sibling" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( child1, "child" ) );

		child1.getName();
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "name" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "sibling" ) );
		Assert.assertTrue( Hibernate.isPropertyInitialized( child1, "name" ) );
		Assert.assertTrue( Hibernate.isPropertyInitialized( child1, "sibling" ) );
		Assert.assertTrue( Hibernate.isPropertyInitialized( child1, "child" ) );

		gChild1 = child1.getChild();
		Assert.assertFalse( Hibernate.isInitialized( gChild1 ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "name" ) );
		Assert.assertFalse( Hibernate.isPropertyInitialized( root, "sibling" ) );

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