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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.List;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.dialect.Oracle8iDialect;
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.envers.internal.tools.StringTools;
import org.hibernate.envers.internal.tools.Tools;
import org.hibernate.property.DirectPropertyAccessor;
import org.hibernate.property.Setter;
/**
* TODO: diff
*
* @author Adam Warski (adam at warski dot org)
* @author Michal Skowronek (mskowr at o2 dot pl)
*/
public class SinglePropertyMapper implements PropertyMapper, SimpleMapperBuilder {
private PropertyData propertyData;
public SinglePropertyMapper(PropertyData propertyData) {
this.propertyData = propertyData;
}
public SinglePropertyMapper() {
}
@Override
public void add(PropertyData propertyData) {
if ( this.propertyData != null ) {
throw new AuditException( "Only one property can be added!" );
}
this.propertyData = propertyData;
}
@Override
public boolean mapToMapFromEntity(
SessionImplementor session,
Map data,
Object newObj,
Object oldObj) {
data.put( propertyData.getName(), newObj );
boolean dbLogicallyDifferent = true;
if ( (session.getFactory()
.getDialect() instanceof Oracle8iDialect) && (newObj instanceof String || oldObj instanceof String) ) {
// Don't generate new revision when database replaces empty string with NULL during INSERT or UPDATE statements.
dbLogicallyDifferent = !(StringTools.isEmpty( newObj ) && StringTools.isEmpty( oldObj ));
}
return dbLogicallyDifferent && !Tools.objectsEqual( newObj, oldObj );
}
@Override
public void mapModifiedFlagsToMapFromEntity(
SessionImplementor session,
Map data,
Object newObj,
Object oldObj) {
if ( propertyData.isUsingModifiedFlag() ) {
data.put( propertyData.getModifiedFlagPropertyName(), !Tools.objectsEqual( newObj, oldObj ) );
}
}
@Override
public void mapModifiedFlagsToMapForCollectionChange(String collectionPropertyName, Map data) {
}
@Override
public void mapToEntityFromMap(
AuditConfiguration verCfg, Object obj, Map data, Object primaryKey,
AuditReaderImplementor versionsReader, Number revision) {
if ( data == null || obj == null ) {
return;
}
final Setter setter = ReflectionTools.getSetter( obj.getClass(), propertyData );
final Object value = data.get( propertyData.getName() );
// We only set a null value if the field is not primite. Otherwise, we leave it intact.
if ( value != null || !isPrimitive( setter, propertyData, obj.getClass() ) ) {
setter.set( obj, value, null );
}
}
private boolean isPrimitive(Setter setter, PropertyData propertyData, Class cls) {
if ( cls == null ) {
throw new HibernateException( "No field found for property: " + propertyData.getName() );
}
if ( setter instanceof DirectPropertyAccessor.DirectSetter ) {
// In a direct setter, getMethod() returns null
// Trying to look up the field
try {
return cls.getDeclaredField( propertyData.getBeanName() ).getType().isPrimitive();
}
catch (NoSuchFieldException e) {
return isPrimitive( setter, propertyData, cls.getSuperclass() );
}
}
else {
return setter.getMethod().getParameterTypes()[0].isPrimitive();
}
}
@Override
public List mapCollectionChanges(
SessionImplementor sessionImplementor,
String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl,
Serializable id) {
return null;
}
}