org.hibernate.envers.query.criteria.CriteriaTools 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
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*/
package org.hibernate.envers.query.criteria;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.entities.RelationDescription;
import org.hibernate.envers.entities.RelationType;
import org.hibernate.envers.exception.AuditException;
/**
* @author Adam Warski (adam at warski dot org)
*/
public class CriteriaTools {
private CriteriaTools() { }
public static void checkPropertyNotARelation(AuditConfiguration verCfg, String entityName,
String propertyName) throws AuditException {
if (verCfg.getEntCfg().get(entityName).isRelation(propertyName)) {
throw new AuditException("This criterion cannot be used on a property that is " +
"a relation to another property.");
}
}
public static RelationDescription getRelatedEntity(AuditConfiguration verCfg, String entityName,
String propertyName) throws AuditException {
RelationDescription relationDesc = verCfg.getEntCfg().getRelationDescription(entityName, propertyName);
if (relationDesc == null) {
return null;
}
if (relationDesc.getRelationType() == RelationType.TO_ONE) {
return relationDesc;
}
throw new AuditException("This type of relation (" + entityName + "." + propertyName +
") isn't supported and can't be used in queries.");
}
}