/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, 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.envers.internal.revisioninfo;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.util.Date;
import org.hibernate.MappingException;
import org.hibernate.Session;
import org.hibernate.envers.EntityTrackingRevisionListener;
import org.hibernate.envers.RevisionListener;
import org.hibernate.envers.RevisionType;
import org.hibernate.envers.internal.entities.PropertyData;
import org.hibernate.envers.internal.synchronization.SessionCacheCleaner;
import org.hibernate.envers.internal.tools.ReflectionTools;
import org.hibernate.internal.util.ReflectHelper;
import org.hibernate.property.Setter;
/**
* @author Adam Warski (adam at warski dot org)
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public class DefaultRevisionInfoGenerator implements RevisionInfoGenerator {
private final String revisionInfoEntityName;
private final RevisionListener listener;
private final Setter revisionTimestampSetter;
private final boolean timestampAsDate;
private final Class<?> revisionInfoClass;
private final SessionCacheCleaner sessionCacheCleaner;
public DefaultRevisionInfoGenerator(
String revisionInfoEntityName, Class<?> revisionInfoClass,
Class<? extends RevisionListener> listenerClass,
PropertyData revisionInfoTimestampData,
boolean timestampAsDate) {
this.revisionInfoEntityName = revisionInfoEntityName;
this.revisionInfoClass = revisionInfoClass;
this.timestampAsDate = timestampAsDate;
revisionTimestampSetter = ReflectionTools.getSetter( revisionInfoClass, revisionInfoTimestampData );
if ( !listenerClass.equals( RevisionListener.class ) ) {
// This is not the default value.
try {
listener = (RevisionListener) ReflectHelper.getDefaultConstructor( listenerClass ).newInstance();
}
catch (InstantiationException e) {
throw new MappingException( e );
}
catch (IllegalAccessException e) {
throw new MappingException( e );
}
catch (InvocationTargetException e) {
throw new MappingException( e );
}
}
else {
// Default listener - none
listener = null;
}
sessionCacheCleaner = new SessionCacheCleaner();
}
@Override
public void saveRevisionData(Session session, Object revisionData) {
session.save( revisionInfoEntityName, revisionData );
sessionCacheCleaner.scheduleAuditDataRemoval( session, revisionData );
}
@Override
public Object generate() {
Object revisionInfo;
try {
revisionInfo = ReflectHelper.getDefaultConstructor( revisionInfoClass ).newInstance();
}
catch (Exception e) {
throw new RuntimeException( e );
}
final long timestamp = System.currentTimeMillis();
revisionTimestampSetter.set( revisionInfo, timestampAsDate ? new Date( timestamp ) : timestamp, null );
if ( listener != null ) {
listener.newRevision( revisionInfo );
}
return revisionInfo;
}
@Override
public void entityChanged(
Class entityClass,
String entityName,
Serializable entityId,
RevisionType revisionType,
Object revisionInfo) {
if ( listener instanceof EntityTrackingRevisionListener ) {
( (EntityTrackingRevisionListener) listener ).entityChanged(
entityClass,
entityName,
entityId,
revisionType,
revisionInfo
);
}
}
}