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/*
* 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.entities.mapper;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.configuration.spi.AuditConfiguration;
import org.hibernate.envers.exception.AuditException;
import org.hibernate.envers.internal.entities.PropertyData;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;
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 Michal Skowronek (mskowr at o2 dot pl)
* @author Lukasz Zuchowski (author at zuchos dot com)
*/
public class ComponentPropertyMapper implements PropertyMapper, CompositeMapperBuilder {
private final PropertyData propertyData;
private final MultiPropertyMapper delegate;
private final Class componentClass;
public ComponentPropertyMapper(PropertyData propertyData, Class componentClass) {
this.propertyData = propertyData;
//if class is a map it means that this is dynamic component
if ( Map.class.isAssignableFrom( componentClass ) ) {
this.delegate = new MultiDynamicComponentMapper( propertyData );
this.componentClass = HashMap.class;
}
else {
this.delegate = new MultiPropertyMapper();
this.componentClass = componentClass;
}
}
@Override
public void add(PropertyData propertyData) {
delegate.add( propertyData );
}
@Override
public CompositeMapperBuilder addComponent(PropertyData propertyData, Class componentClass) {
return delegate.addComponent( propertyData, componentClass );
}
@Override
public void addComposite(PropertyData propertyData, PropertyMapper propertyMapper) {
delegate.addComposite( propertyData, propertyMapper );
}
@Override
public boolean mapToMapFromEntity(
SessionImplementor session,
Map data,
Object newObj,
Object oldObj) {
return delegate.mapToMapFromEntity( session, data, newObj, oldObj );
}
@Override
public void mapModifiedFlagsToMapFromEntity(
SessionImplementor session,
Map data,
Object newObj,
Object oldObj) {
if ( propertyData.isUsingModifiedFlag() ) {
data.put(
propertyData.getModifiedFlagPropertyName(),
delegate.mapToMapFromEntity( session, new HashMap(), newObj, oldObj )
);
}
}
@Override
public void mapModifiedFlagsToMapForCollectionChange(String collectionPropertyName, Map data) {
if ( propertyData.isUsingModifiedFlag() ) {
boolean hasModifiedCollection = false;
for ( PropertyData propData : delegate.getProperties().keySet() ) {
if ( collectionPropertyName.equals( propData.getName() ) ) {
hasModifiedCollection = true;
break;
}
}
data.put( propertyData.getModifiedFlagPropertyName(), hasModifiedCollection );
}
}
@Override
public void mapToEntityFromMap(
AuditConfiguration verCfg,
Object obj,
Map data,
Object primaryKey,
AuditReaderImplementor versionsReader,
Number revision) {
if ( data == null || obj == null ) {
return;
}
if ( propertyData.getBeanName() == null ) {
// If properties are not encapsulated in a component but placed directly in a class
// (e.g. by applying tag).
delegate.mapToEntityFromMap( verCfg, obj, data, primaryKey, versionsReader, revision );
return;
}
final 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 property : delegate.getProperties().entrySet() ) {
if ( data.get(
property.getKey()
.getName()
) != null || !( property.getValue() instanceof SinglePropertyMapper ) ) {
allNullAndSingle = false;
break;
}
}
if ( allNullAndSingle ) {
// single property, but default value need not be null, so we'll set it to null anyway
setter.set( obj, null, null );
}
else {
// set the component
try {
final Object subObj = ReflectHelper.getDefaultConstructor( componentClass ).newInstance();
setter.set( obj, subObj, null );
delegate.mapToEntityFromMap( verCfg, subObj, data, primaryKey, versionsReader, revision );
}
catch ( Exception e ) {
throw new AuditException( e );
}
}
}
@Override
public List mapCollectionChanges(
SessionImplementor session, String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl, Serializable id) {
return delegate.mapCollectionChanges( session, referencingPropertyName, newColl, oldColl, id );
}
@Override
public Map getProperties() {
return delegate.getProperties();
}
}