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org.hibernate.envers.internal.entities.mapper.ComponentPropertyMapper Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.envers.internal.entities.mapper;
import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedAction;
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.boot.internal.EnversService;
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.access.spi.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)
* @author Chris Cranford
*/
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(
final EnversService enversService,
final Object obj,
final Map data,
final Object primaryKey,
final AuditReaderImplementor versionsReader,
final 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( enversService, obj, data, primaryKey, versionsReader, revision );
return;
}
AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public Object run() {
final Setter setter = ReflectionTools.getSetter(
obj.getClass(),
propertyData,
enversService.getServiceRegistry()
);
if ( isAllPropertiesNull( data ) ) {
// 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( enversService, subObj, data, primaryKey, versionsReader, revision );
}
catch ( Exception e ) {
throw new AuditException( e );
}
}
return null;
}
}
);
}
private boolean isAllPropertiesNull(Map data) {
for ( Map.Entry property : delegate.getProperties().entrySet() ) {
final Object value = data.get( property.getKey().getName() );
if ( value != null || !( property.getValue() instanceof SinglePropertyMapper ) ) {
return false;
}
}
return true;
}
@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();
}
@Override
public boolean hasPropertiesWithModifiedFlag() {
return delegate.hasPropertiesWithModifiedFlag();
}
}