org.hibernate.envers.internal.entities.mapper.relation.component.MiddleMapKeyIdComponentMapper Maven / Gradle / Ivy
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Hibernate's entity version (audit/history) support
/*
* 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.util.Map;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.configuration.internal.AuditEntitiesConfiguration;
import org.hibernate.envers.internal.entities.EntityInstantiator;
import org.hibernate.envers.internal.entities.mapper.id.IdMapper;
import org.hibernate.envers.internal.tools.query.Parameters;
/**
* A component mapper for the @MapKey mapping: the value of the map's key is the id 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 final class MiddleMapKeyIdComponentMapper implements MiddleComponentMapper {
private final AuditEntitiesConfiguration verEntCfg;
private final IdMapper relatedIdMapper;
public MiddleMapKeyIdComponentMapper(AuditEntitiesConfiguration verEntCfg, IdMapper relatedIdMapper) {
this.verEntCfg = verEntCfg;
this.relatedIdMapper = relatedIdMapper;
}
@Override
public Object mapToObjectFromFullMap(
EntityInstantiator entityInstantiator, Map data,
Object dataObject, Number revision) {
return relatedIdMapper.mapToIdFromMap( (Map) data.get( verEntCfg.getOriginalIdPropName() ) );
}
@Override
public void mapToMapFromObject(
SessionImplementor session,
Map idData,
Map data,
Object obj) {
// Doing nothing.
}
@Override
public void addMiddleEqualToQuery(
Parameters parameters,
String idPrefix1,
String prefix1,
String idPrefix2,
String prefix2) {
// Doing nothing.
}
}