/*
* 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.entities.mapper;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
import org.hibernate.envers.entities.PropertyData;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.exception.AuditException;
import org.hibernate.envers.reader.AuditReaderImplementor;
import org.hibernate.envers.tools.reflection.ReflectionTools;
import org.hibernate.collection.PersistentCollection;
import org.hibernate.property.Setter;
import org.hibernate.util.ReflectHelper;
import org.hibernate.engine.SessionImplementor;
/**
* @author Adam Warski (adam at warski dot org)
*/
public class ComponentPropertyMapper implements PropertyMapper, CompositeMapperBuilder {
private final PropertyData propertyData;
private final MultiPropertyMapper delegate;
private final String componentClassName;
public ComponentPropertyMapper(PropertyData propertyData, String componentClassName) {
this.propertyData = propertyData;
this.delegate = new MultiPropertyMapper();
this.componentClassName = componentClassName;
}
public void add(PropertyData propertyData) {
delegate.add(propertyData);
}
public CompositeMapperBuilder addComponent(PropertyData propertyData, String componentClassName) {
return delegate.addComponent(propertyData, componentClassName);
}
public void addComposite(PropertyData propertyData, PropertyMapper propertyMapper) {
delegate.addComposite(propertyData, propertyMapper);
}
public boolean mapToMapFromEntity(SessionImplementor session, Map<String, Object> data, Object newObj, Object oldObj) {
return delegate.mapToMapFromEntity(session, data, newObj, oldObj);
}
public void mapToEntityFromMap(AuditConfiguration verCfg, Object obj, Map data, Object primaryKey, AuditReaderImplementor versionsReader, Number revision) {
if (data == null || obj == null) {
return;
}
Setter setter = ReflectionTools.getSetter(obj.getClass(), propertyData);
// If all properties are null and single, then the component has to be null also.
boolean allNullAndSingle = true;
for (Map.Entry<PropertyData, PropertyMapper> property : delegate.getProperties().entrySet()) {
if (data.get(property.getKey().getName()) != null || !(property.getValue() instanceof SinglePropertyMapper)) {
allNullAndSingle = false;
break;
}
}
// And we don't have to set anything on the object - the default value is null
if (!allNullAndSingle) {
try {
Object subObj = ReflectHelper.getDefaultConstructor(
Thread.currentThread().getContextClassLoader().loadClass(componentClassName)).newInstance();
setter.set(obj, subObj, null);
delegate.mapToEntityFromMap(verCfg, subObj, data, primaryKey, versionsReader, revision);
} catch (Exception e) {
throw new AuditException(e);
}
}
}
public List<PersistentCollectionChangeData> mapCollectionChanges(String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl,
Serializable id) {
return delegate.mapCollectionChanges(referencingPropertyName, newColl, oldColl, id);
}
}