/*
* 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.HibernateException;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.entities.PropertyData;
import org.hibernate.envers.exception.AuditException;
import org.hibernate.envers.reader.AuditReaderImplementor;
import org.hibernate.envers.tools.StringTools;
import org.hibernate.envers.tools.Tools;
import org.hibernate.envers.tools.reflection.ReflectionTools;
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() { }
public void add(PropertyData propertyData) {
if (this.propertyData != null) {
throw new AuditException("Only one property can be added!");
}
this.propertyData = propertyData;
}
public boolean mapToMapFromEntity(SessionImplementor session, Map<String, Object> 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((String) newObj) && StringTools.isEmpty((String) oldObj));
}
return dbLogicallyDifferent && !Tools.objectsEqual(newObj, oldObj);
}
@Override
public void mapModifiedFlagsToMapFromEntity(SessionImplementor session, Map<String, Object> data, Object newObj, Object oldObj) {
if (propertyData.isUsingModifiedFlag()) {
data.put(propertyData.getModifiedFlagPropertyName(), !Tools.objectsEqual(newObj, oldObj));
}
}
@Override
public void mapModifiedFlagsToMapForCollectionChange(String collectionPropertyName, Map<String, Object> data) {
}
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);
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();
}
}
public List<PersistentCollectionChangeData> mapCollectionChanges(String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl,
Serializable id) {
return null;
}
}