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org.hibernate.envers.internal.entities.mapper.relation.component.MiddleEmbeddableComponentMapper 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.relation.component;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Map;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.exception.AuditException;
import org.hibernate.envers.internal.entities.EntityInstantiator;
import org.hibernate.envers.internal.entities.PropertyData;
import org.hibernate.envers.internal.entities.mapper.CompositeMapperBuilder;
import org.hibernate.envers.internal.entities.mapper.MultiPropertyMapper;
import org.hibernate.envers.internal.entities.mapper.PropertyMapper;
import org.hibernate.envers.internal.entities.mapper.relation.ToOneIdMapper;
import org.hibernate.envers.internal.tools.query.Parameters;
import org.hibernate.internal.util.ReflectHelper;
/**
* @author Kristoffer Lundberg (kristoffer at cambio dot se)
*/
public class MiddleEmbeddableComponentMapper implements MiddleComponentMapper, CompositeMapperBuilder {
private final MultiPropertyMapper delegate;
private final Class componentClass;
public MiddleEmbeddableComponentMapper(MultiPropertyMapper delegate, Class componentClass) {
this.delegate = delegate;
this.componentClass = componentClass;
}
@Override
public Object mapToObjectFromFullMap(
EntityInstantiator entityInstantiator,
Map data,
Object dataObject,
Number revision) {
try {
final Object componentInstance = getComponentInstance( dataObject );
delegate.mapToEntityFromMap(
entityInstantiator.getEnversService(),
componentInstance,
data,
null,
entityInstantiator.getAuditReaderImplementor(),
revision
);
return componentInstance;
}
catch (AuditException e) {
// just throw the AuditException without wrapping in another AuditException
throw e;
}
catch (Exception e) {
throw new AuditException( e );
}
}
private Object getComponentInstance(Object dataObject) {
if ( dataObject != null ) {
return dataObject;
}
return AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public Object run() {
try {
return ReflectHelper.getDefaultConstructor( componentClass ).newInstance();
}
catch ( InstantiationException e ) {
throw new AuditException( e );
}
catch ( IllegalAccessException e ) {
throw new AuditException( e );
}
catch ( InvocationTargetException e ) {
throw new AuditException( e );
}
}
}
);
}
@Override
public void mapToMapFromObject(
SessionImplementor session,
Map idData,
Map data,
Object obj) {
delegate.mapToMapFromEntity( session, data, obj, obj );
}
@Override
public void addMiddleEqualToQuery(
Parameters parameters,
String idPrefix1,
String prefix1,
String idPrefix2,
String prefix2) {
addMiddleEqualToQuery( delegate, parameters, idPrefix1, prefix1, idPrefix2, prefix2 );
}
protected void addMiddleEqualToQuery(
CompositeMapperBuilder compositeMapper,
Parameters parameters,
String idPrefix1,
String prefix1,
String idPrefix2,
String prefix2) {
for ( final Map.Entry entry : compositeMapper.getProperties().entrySet() ) {
final String propertyName = entry.getKey().getName();
final PropertyMapper nestedMapper = entry.getValue();
if ( nestedMapper instanceof CompositeMapperBuilder ) {
addMiddleEqualToQuery(
(CompositeMapperBuilder) nestedMapper,
parameters,
idPrefix1,
prefix1,
idPrefix2,
prefix2
);
}
else if ( nestedMapper instanceof ToOneIdMapper ) {
( (ToOneIdMapper) nestedMapper ).addMiddleEqualToQuery(
parameters,
idPrefix1,
prefix1,
idPrefix2,
prefix2
);
}
else {
parameters.addWhereOrNullRestriction(
prefix1 + '.' + propertyName,
false,
"=",
prefix2 + '.' + propertyName, false
);
}
}
}
@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 void add(PropertyData propertyData) {
delegate.add( propertyData );
}
public Map getProperties() {
return delegate.getProperties();
}
}
