RemovedEntityTest.java

/*
 * 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.test.jpa.removed;

import java.math.BigDecimal;

import org.hibernate.Session;

import org.hibernate.test.jpa.AbstractJPATest;
import org.hibernate.test.jpa.Item;
import org.hibernate.test.jpa.Part;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

/**
 * @author Steve Ebersole
 */
public class RemovedEntityTest extends AbstractJPATest {
	@Test
	public void testRemoveThenContains() {
		Session s = openSession();
		s.beginTransaction();
		Item item = new Item();
		item.setName( "dummy" );
		s.persist( item );
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		s.delete( item );
		boolean contains = s.contains( item );
		s.getTransaction().commit();
		s.close();

		assertFalse( "expecting removed entity to not be contained", contains );
	}

	@Test
	public void testRemoveThenGet() {
		Session s = openSession();
		s.beginTransaction();
		Item item = new Item();
		item.setName( "dummy" );
		s.persist( item );
		s.getTransaction().commit();
		s.close();

		Long id = item.getId();

		s = openSession();
		s.beginTransaction();
		s.delete( item );
		item = ( Item ) s.get( Item.class, id );
		s.getTransaction().commit();
		s.close();

		assertNull( "expecting removed entity to be returned as null from get()", item );
	}

	@Test
	public void testRemoveThenSave() {
		Session s = openSession();
		s.beginTransaction();
		Item item = new Item();
		item.setName( "dummy" );
		s.persist( item );
		s.getTransaction().commit();
		s.close();

		Long id = item.getId();

		s = openSession();
		s.beginTransaction();
		item = ( Item ) s.get( Item.class, id );
		String sessionAsString = s.toString();

		s.delete( item );

		Item item2 = ( Item ) s.get( Item.class, id );
		assertNull( "expecting removed entity to be returned as null from get()", item2 );

		s.persist( item );
		assertEquals( "expecting session to be as it was before", sessionAsString, s.toString() );

		item.setName("Rescued");
		item = ( Item ) s.get( Item.class, id );
		assertNotNull( "expecting rescued entity to be returned from get()", item );

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

		s = openSession();
		s.beginTransaction();
		item = ( Item ) s.get( Item.class, id );
		s.getTransaction().commit();
		s.close();

		assertNotNull( "expecting removed entity to be returned as null from get()", item );
		assertEquals("Rescued", item.getName());

		// clean up
		s = openSession();
		s.beginTransaction();
		s.delete( item );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testRemoveThenSaveWithCascades() {
		Session s = openSession();
		s.beginTransaction();

		Item item = new Item();
		item.setName( "dummy" );
		Part part = new Part(item, "child", "1234", BigDecimal.ONE);

		// persist cascades to part
		s.persist( item );

		// delete cascades to part also
		s.delete( item );
		assertFalse( "the item is contained in the session after deletion", s.contains( item ) );
		assertFalse( "the part is contained in the session after deletion", s.contains( part ) );

		// now try to persist again as a "unschedule removal" operation
		s.persist( item );
		assertTrue( "the item is contained in the session after deletion", s.contains( item ) );
		assertTrue( "the part is contained in the session after deletion", s.contains( part ) );

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

		// clean up
		s = openSession();
		s.beginTransaction();
		s.delete( item );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testRemoveChildThenFlushWithCascadePersist() {
		Session s = openSession();
		s.beginTransaction();

		Item item = new Item();
		item.setName( "dummy" );
		Part child = new Part(item, "child", "1234", BigDecimal.ONE);

		// persist cascades to part
		s.persist( item );

		// delete the part
		s.delete( child );
		assertFalse("the child is contained in the session, since it is deleted", s.contains(child) );

		// now try to flush, which will attempt to cascade persist again to child.
		s.flush();
		assertTrue("Now it is consistent again since if was cascade-persisted by the flush()", s.contains(child));

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

		// clean up
		s = openSession();
		s.beginTransaction();
		s.delete( item );
		s.getTransaction().commit();
		s.close();
	}
}