/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, 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.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.internal.entities.PropertyData;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;
import org.hibernate.envers.internal.tools.MappingTools;
import org.hibernate.envers.internal.tools.ReflectionTools;
import org.hibernate.envers.internal.tools.Tools;
import org.hibernate.envers.tools.Pair;
import org.hibernate.property.Getter;
/**
* @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 MultiPropertyMapper implements ExtendedPropertyMapper {
protected final Map<PropertyData, PropertyMapper> properties;
private final Map<String, PropertyData> propertyDatas;
public MultiPropertyMapper() {
properties = Tools.newHashMap();
propertyDatas = Tools.newHashMap();
}
@Override
public void add(PropertyData propertyData) {
final SinglePropertyMapper single = new SinglePropertyMapper();
single.add( propertyData );
properties.put( propertyData, single );
propertyDatas.put( propertyData.getName(), propertyData );
}
@Override
public CompositeMapperBuilder addComponent(PropertyData propertyData, Class componentClass) {
if ( properties.get( propertyData ) != null ) {
// This is needed for second pass to work properly in the components mapper
return (CompositeMapperBuilder) properties.get( propertyData );
}
final ComponentPropertyMapper componentMapperBuilder = new ComponentPropertyMapper(
propertyData,
componentClass
);
addComposite( propertyData, componentMapperBuilder );
return componentMapperBuilder;
}
@Override
public void addComposite(PropertyData propertyData, PropertyMapper propertyMapper) {
properties.put( propertyData, propertyMapper );
propertyDatas.put( propertyData.getName(), propertyData );
}
protected Object getAtIndexOrNull(Object[] array, int index) {
return array == null ? null : array[index];
}
@Override
public boolean map(
SessionImplementor session,
Map<String, Object> data,
String[] propertyNames,
Object[] newState,
Object[] oldState) {
boolean ret = false;
for ( int i = 0; i < propertyNames.length; i++ ) {
final String propertyName = propertyNames[i];
if ( propertyDatas.containsKey( propertyName ) ) {
final PropertyMapper propertyMapper = properties.get( propertyDatas.get( propertyName ) );
final Object newObj = getAtIndexOrNull( newState, i );
final Object oldObj = getAtIndexOrNull( oldState, i );
ret |= propertyMapper.mapToMapFromEntity( session, data, newObj, oldObj );
propertyMapper.mapModifiedFlagsToMapFromEntity( session, data, newObj, oldObj );
}
}
return ret;
}
@Override
public boolean mapToMapFromEntity(
SessionImplementor session,
Map<String, Object> data,
Object newObj,
Object oldObj) {
boolean ret = false;
for ( PropertyData propertyData : properties.keySet() ) {
Getter getter;
if ( newObj != null ) {
getter = ReflectionTools.getGetter( newObj.getClass(), propertyData );
}
else if ( oldObj != null ) {
getter = ReflectionTools.getGetter( oldObj.getClass(), propertyData );
}
else {
return false;
}
ret |= properties.get( propertyData ).mapToMapFromEntity(
session, data,
newObj == null ? null : getter.get( newObj ),
oldObj == null ? null : getter.get( oldObj )
);
}
return ret;
}
@Override
public void mapModifiedFlagsToMapFromEntity(
SessionImplementor session,
Map<String, Object> data,
Object newObj,
Object oldObj) {
for ( PropertyData propertyData : properties.keySet() ) {
Getter getter;
if ( newObj != null ) {
getter = ReflectionTools.getGetter( newObj.getClass(), propertyData );
}
else if ( oldObj != null ) {
getter = ReflectionTools.getGetter( oldObj.getClass(), propertyData );
}
else {
return;
}
properties.get( propertyData ).mapModifiedFlagsToMapFromEntity(
session, data,
newObj == null ? null : getter.get( newObj ),
oldObj == null ? null : getter.get( oldObj )
);
}
}
@Override
public void mapToEntityFromMap(
AuditConfiguration verCfg, Object obj, Map data, Object primaryKey,
AuditReaderImplementor versionsReader, Number revision) {
for ( PropertyMapper mapper : properties.values() ) {
mapper.mapToEntityFromMap( verCfg, obj, data, primaryKey, versionsReader, revision );
}
}
private Pair<PropertyMapper, String> getMapperAndDelegatePropName(String referencingPropertyName) {
// Name of the property, to which we will delegate the mapping.
String delegatePropertyName;
// Checking if the property name doesn't reference a collection in a component - then the name will containa a .
final int dotIndex = referencingPropertyName.indexOf( '.' );
if ( dotIndex != -1 ) {
// Computing the name of the component
final String componentName = referencingPropertyName.substring( 0, dotIndex );
// And the name of the property in the component
final String propertyInComponentName = MappingTools.createComponentPrefix( componentName )
+ referencingPropertyName.substring( dotIndex + 1 );
// We need to get the mapper for the component.
referencingPropertyName = componentName;
// As this is a component, we delegate to the property in the component.
delegatePropertyName = propertyInComponentName;
}
else {
// If this is not a component, we delegate to the same property.
delegatePropertyName = referencingPropertyName;
}
return Pair.make( properties.get( propertyDatas.get( referencingPropertyName ) ), delegatePropertyName );
}
@Override
public void mapModifiedFlagsToMapForCollectionChange(String collectionPropertyName, Map<String, Object> data) {
final Pair<PropertyMapper, String> pair = getMapperAndDelegatePropName( collectionPropertyName );
final PropertyMapper mapper = pair.getFirst();
if ( mapper != null ) {
mapper.mapModifiedFlagsToMapForCollectionChange( pair.getSecond(), data );
}
}
@Override
public List<PersistentCollectionChangeData> mapCollectionChanges(
SessionImplementor session,
String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl, Serializable id) {
final Pair<PropertyMapper, String> pair = getMapperAndDelegatePropName( referencingPropertyName );
final PropertyMapper mapper = pair.getFirst();
if ( mapper != null ) {
return mapper.mapCollectionChanges( session, pair.getSecond(), newColl, oldColl, id );
}
else {
return null;
}
}
@Override
public Map<PropertyData, PropertyMapper> getProperties() {
return properties;
}
public Map<String, PropertyData> getPropertyDatas() {
return propertyDatas;
}
}