/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2012, 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.naturalid.nullable;

import org.junit.Test;

import org.hibernate.Session;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;

/**
 * @author Steve Ebersole
 */
public class NullableNaturalIdTest extends BaseCoreFunctionalTestCase {
	@Override
	protected Class<?>[] getAnnotatedClasses() {
		return new Class[] { A.class, B.class, C.class, D.class };
	}

	@Test
	public void testNaturalIdNullValueOnPersist() {
		Session session = openSession();
		session.beginTransaction();
		C c = new C();
		session.persist( c );
		c.name = "someName";
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		session.delete( c );
		session.getTransaction().commit();
		session.close();
	}

	@Test
	public void testUniqueAssociation() {
		Session session = openSession();
		session.beginTransaction();
		A a = new A();
		B b = new B();
		b.naturalid = 100;
		session.persist( a );
		session.persist( b ); //b.assA is declared NaturalId, his value is null this moment
		b.assA = a;
		a.assB.add( b );
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		// this is OK
		assertNotNull( session.byNaturalId( B.class ).using( "naturalid", 100 ).using( "assA", a ).load() );
		// this fails, cause EntityType.compare(Object x, Object y) always returns 0 !
		assertNull( session.byNaturalId( B.class ).using( "naturalid", 100 ).using( "assA", null ).load() );
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		session.delete( b );
		session.delete( a );
		session.getTransaction().commit();
		session.close();
	}

	@Test
	public void testNaturalIdQuerySupportingNullValues() {
		Session session = openSession();
		session.beginTransaction();
		D d1 = new D();
		d1.name = "Titi";
		d1.associatedC = null;
		D d2 = new D();
		d2.name = null;
		C c = new C();
		d2.associatedC = c;
		session.persist( d1 );
		session.persist( d2 );
		session.persist( c );
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		assertNotNull( session.byNaturalId( D.class ).using( "name", null ).using( "associatedC", c ).load() );
		assertNotNull( session.byNaturalId( D.class ).using( "name", "Titi" ).using( "associatedC", null ).load() );
		session.getTransaction().commit();
		session.close();

		session = openSession();
		session.beginTransaction();
		session.delete( c );
		session.delete( d1 );
		session.delete( d2 );
		session.getTransaction().commit();
		session.close();
	}
}