/*
* 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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.envers.internal.entities.mapper.relation.component;
import java.util.Map;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.internal.entities.EntityInstantiator;
import org.hibernate.envers.internal.tools.ReflectionTools;
import org.hibernate.envers.internal.tools.query.Parameters;
/**
* A component mapper for the @MapKey mapping with the name parameter specified: the value of the map's key
* is a property of the entity. This doesn't have an effect on the data stored in the versions tables,
* so <code>mapToMapFromObject</code> is empty.
*
* @author Adam Warski (adam at warski dot org)
*/
public class MiddleMapKeyPropertyComponentMapper implements MiddleComponentMapper {
private final String propertyName;
private final String accessType;
public MiddleMapKeyPropertyComponentMapper(String propertyName, String accessType) {
this.propertyName = propertyName;
this.accessType = accessType;
}
@Override
public Object mapToObjectFromFullMap(
EntityInstantiator entityInstantiator, Map<String, Object> data,
Object dataObject, Number revision) {
// dataObject is not null, as this mapper can only be used in an index.
return ReflectionTools.getGetter( dataObject.getClass(), propertyName, accessType, entityInstantiator.getEnversService().getServiceRegistry() ).get( dataObject );
}
@Override
public void mapToMapFromObject(
SessionImplementor session,
Map<String, Object> idData,
Map<String, Object> data,
Object obj) {
// Doing nothing.
}
@Override
public void addMiddleEqualToQuery(
Parameters parameters,
String idPrefix1,
String prefix1,
String idPrefix2,
String prefix2) {
// Doing nothing.
}
}