org.hibernate.envers.query.projection.internal.EntityAuditProjection 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.query.projection.internal;
import java.util.Map;
import org.hibernate.envers.boot.internal.EnversService;
import org.hibernate.envers.internal.entities.EntityInstantiator;
import org.hibernate.envers.query.projection.AuditProjection;
/**
* @author Felix Feisst (feisst dot felix at gmail dot com)
*/
public class EntityAuditProjection implements AuditProjection {
private final String alias;
private final boolean distinct;
public EntityAuditProjection(String alias, boolean distinct) {
this.alias = alias;
this.distinct = distinct;
}
@Override
public ProjectionData getData(final EnversService enversService) {
// no property is selected, instead the whole entity (alias) is selected
return new ProjectionData( null, alias, null, distinct );
}
@Override
public Object convertQueryResult(
final EnversService enversService,
final EntityInstantiator entityInstantiator,
final String entityName,
final Number revision,
final Object value) {
final Object result;
if ( enversService.getEntitiesConfigurations().isVersioned( entityName ) ) {
result = entityInstantiator.createInstanceFromVersionsEntity( entityName, (Map) value, revision );
}
else {
result = value;
}
return result;
}
}