/*
 * 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.lob;

import java.util.Arrays;

import org.hibernate.Session;

import org.hibernate.testing.DialectChecks;
import org.hibernate.testing.RequiresDialectFeature;
import org.hibernate.testing.TestForIssue;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * @author Steve Ebersole
 */
@TestForIssue( jiraKey = "HHH-2680" )
@RequiresDialectFeature( {DialectChecks.SupportsExpectedLobUsagePattern.class, DialectChecks.SupportsLobValueChangePropogation.class} ) // Skip for Sybase. HHH-6807
public class LobMergeTest extends BaseCoreFunctionalTestCase {
	private static final int LOB_SIZE = 10000;

	public String[] getMappings() {
		return new String[] { "lob/LobMappings.hbm.xml" };
	}

	@Test
	public void testMergingBlobData() throws Exception {
		final byte[] original = BlobLocatorTest.buildByteArray( LOB_SIZE, true );
		final byte[] updated = BlobLocatorTest.buildByteArray( LOB_SIZE, false );

		Session s = openSession();
		s.beginTransaction();

		LobHolder entity = new LobHolder();
		entity.setBlobLocator( s.getLobHelper().createBlob( original ) );
		s.save( entity );
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		// entity still detached...
		entity.setBlobLocator( s.getLobHelper().createBlob( updated ) );
		entity = (LobHolder) s.merge( entity );
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		entity = (LobHolder) s.get( LobHolder.class, entity.getId() );
		assertEquals( "blob sizes did not match after merge", LOB_SIZE, entity.getBlobLocator().length() );
		assertTrue(
				"blob contents did not match after merge",
				Arrays.equals( updated, BlobLocatorTest.extractData( entity.getBlobLocator() ) )
		);
		s.delete( entity );
		s.getTransaction().commit();
		s.close();
	}

	@Test
	public void testMergingClobData() throws Exception {
		final String original = ClobLocatorTest.buildString( LOB_SIZE, 'a' );
		final String updated = ClobLocatorTest.buildString( LOB_SIZE, 'z' );

		Session s = openSession();
		s.beginTransaction();

		LobHolder entity = new LobHolder();
		entity.setClobLocator( s.getLobHelper().createClob( original ) );
		s.save( entity );
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		// entity still detached...
		entity.setClobLocator( s.getLobHelper().createClob( updated ) );
		entity = (LobHolder) s.merge( entity );
		s.flush();
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		entity = (LobHolder) s.get( LobHolder.class, entity.getId() );
		assertEquals( "clob sizes did not match after merge", LOB_SIZE, entity.getClobLocator().length() );
		assertEquals(
				"clob contents did not match after merge",
				updated,
				ClobLocatorTest.extractData( entity.getClobLocator() )
		);
		s.delete( entity );
		s.getTransaction().commit();
		s.close();
	}
}