org.hibernate.envers.entities.mapper.relation.component.MiddleMapKeyPropertyComponentMapper Maven / Gradle / Ivy
/*
* 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.relation.component;
import java.util.Map;
import org.hibernate.envers.entities.EntityInstantiator;
import org.hibernate.envers.tools.query.Parameters;
import org.hibernate.envers.tools.reflection.ReflectionTools;
/**
* 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 mapToMapFromObject 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;
}
public Object mapToObjectFromFullMap(EntityInstantiator entityInstantiator, Map 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).get(dataObject);
}
public void mapToMapFromObject(Map data, Object obj) {
// Doing nothing.
}
public void addMiddleEqualToQuery(Parameters parameters, String prefix1, String prefix2) {
// Doing nothing.
}
}