/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.envers.test.integration.cache;

import javax.persistence.EntityManager;

import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
import org.hibernate.envers.test.Priority;
import org.hibernate.envers.test.entities.onetomany.SetRefEdEntity;
import org.hibernate.envers.test.entities.onetomany.SetRefIngEntity;

import org.junit.Test;

/**
 * @author Adam Warski (adam at warski dot org)
 */
@SuppressWarnings({"ObjectEquality"})
public class OneToManyCache extends BaseEnversJPAFunctionalTestCase {
	private Integer ed1_id;
	private Integer ed2_id;

	private Integer ing1_id;
	private Integer ing2_id;

	@Override
	protected Class<?>[] getAnnotatedClasses() {
		return new Class[] {SetRefEdEntity.class, SetRefIngEntity.class};
	}

	@Test
	@Priority(10)
	public void initData() {
		EntityManager em = getEntityManager();

		SetRefEdEntity ed1 = new SetRefEdEntity( 1, "data_ed_1" );
		SetRefEdEntity ed2 = new SetRefEdEntity( 2, "data_ed_2" );

		SetRefIngEntity ing1 = new SetRefIngEntity( 1, "data_ing_1" );
		SetRefIngEntity ing2 = new SetRefIngEntity( 2, "data_ing_2" );

		// Revision 1
		em.getTransaction().begin();

		em.persist( ed1 );
		em.persist( ed2 );

		ing1.setReference( ed1 );
		ing2.setReference( ed1 );

		em.persist( ing1 );
		em.persist( ing2 );

		em.getTransaction().commit();

		// Revision 2
		em.getTransaction().begin();

		ing1 = em.find( SetRefIngEntity.class, ing1.getId() );
		ing2 = em.find( SetRefIngEntity.class, ing2.getId() );
		ed2 = em.find( SetRefEdEntity.class, ed2.getId() );

		ing1.setReference( ed2 );
		ing2.setReference( ed2 );

		em.getTransaction().commit();

		//

		ed1_id = ed1.getId();
		ed2_id = ed2.getId();

		ing1_id = ing1.getId();
		ing2_id = ing2.getId();
	}

	@Test
	public void testCacheReferenceAccessAfterFind() {
		SetRefEdEntity ed1_rev1 = getAuditReader().find( SetRefEdEntity.class, ed1_id, 1 );

		SetRefIngEntity ing1_rev1 = getAuditReader().find( SetRefIngEntity.class, ing1_id, 1 );
		SetRefIngEntity ing2_rev1 = getAuditReader().find( SetRefIngEntity.class, ing2_id, 1 );

		// It should be exactly the same object
		assert ing1_rev1.getReference() == ed1_rev1;
		assert ing2_rev1.getReference() == ed1_rev1;
	}

	@Test
	public void testCacheReferenceAccessAfterCollectionAccessRev1() {
		SetRefEdEntity ed1_rev1 = getAuditReader().find( SetRefEdEntity.class, ed1_id, 1 );

		// It should be exactly the same object
		assert ed1_rev1.getReffering().size() == 2;
		for ( SetRefIngEntity setRefIngEntity : ed1_rev1.getReffering() ) {
			assert setRefIngEntity.getReference() == ed1_rev1;
		}
	}

	@Test
	public void testCacheReferenceAccessAfterCollectionAccessRev2() {
		SetRefEdEntity ed2_rev2 = getAuditReader().find( SetRefEdEntity.class, ed2_id, 2 );

		assert ed2_rev2.getReffering().size() == 2;
		for ( SetRefIngEntity setRefIngEntity : ed2_rev2.getReffering() ) {
			assert setRefIngEntity.getReference() == ed2_rev2;
		}
	}

	@Test
	public void testCacheFindAfterCollectionAccessRev1() {
		SetRefEdEntity ed1_rev1 = getAuditReader().find( SetRefEdEntity.class, ed1_id, 1 );

		// Reading the collection
		assert ed1_rev1.getReffering().size() == 2;

		SetRefIngEntity ing1_rev1 = getAuditReader().find( SetRefIngEntity.class, ing1_id, 1 );
		SetRefIngEntity ing2_rev1 = getAuditReader().find( SetRefIngEntity.class, ing2_id, 1 );

		for ( SetRefIngEntity setRefIngEntity : ed1_rev1.getReffering() ) {
			assert setRefIngEntity == ing1_rev1 || setRefIngEntity == ing2_rev1;
		}
	}
}