org.hibernate.envers.query.criteria.AuditDisjunction Maven / Gradle / Ivy

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.envers.query.criteria;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.envers.configuration.spi.AuditConfiguration;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;
import org.hibernate.envers.internal.tools.query.Parameters;
import org.hibernate.envers.internal.tools.query.QueryBuilder;

/**
 * @author Adam Warski (adam at warski dot org)
 */
public class AuditDisjunction implements AuditCriterion, ExtendableCriterion {
	private List criterions;

	public AuditDisjunction() {
		criterions = new ArrayList();
	}

	@Override
	public AuditDisjunction add(AuditCriterion criterion) {
		criterions.add( criterion );
		return this;
	}

	@Override
	public void addToQuery(
			AuditConfiguration verCfg, AuditReaderImplementor versionsReader, String entityName,
			QueryBuilder qb, Parameters parameters) {
		Parameters orParameters = parameters.addSubParameters( Parameters.OR );

		if ( criterions.size() == 0 ) {
			orParameters.addWhere( "0", false, "=", "1", false );
		}
		else {
			for ( AuditCriterion criterion : criterions ) {
				criterion.addToQuery( verCfg, versionsReader, entityName, qb, orParameters );
			}
		}
	}
}