org.fryske_akademy.ejb.AbstractCrudServiceEnvers Maven / Gradle / Ivy
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package org.fryske_akademy.ejb;
/*-
* #%L
* ejbCrudApi
* %%
* Copyright (C) 2018 Fryske Akademy
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.fryske_akademy.jpa.RevInfo;
import org.fryske_akademy.jpa.RevisionInfo;
import org.hibernate.envers.AuditReaderFactory;
import org.hibernate.envers.Audited;
import org.hibernate.envers.RevisionType;
import org.hibernate.envers.query.AuditEntity;
import org.hibernate.envers.query.AuditQuery;
import org.hibernate.envers.query.criteria.internal.IdentifierEqAuditExpression;
/**
*
* @author eduard
*/
public abstract class AbstractCrudServiceEnvers extends AbstractCrudService implements Auditing{
private static final Logger LOGGER = Logger.getLogger(AbstractCrudServiceEnvers.class.getName());
@Override
public T getRevision(Number n, Class type) {
if (!type.isAnnotationPresent(Audited.class)) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("No @Audited annotation on " + type.getName());
}
return null;
}
return (T) AuditReaderFactory.get(getEntityManager()).createQuery().forEntitiesAtRevision(type, n).getSingleResult();
}
@Override
public List> getRevisionInfo(Serializable id, Integer max, Class type) {
List> result = new ArrayList<>(5);
if (!type.isAnnotationPresent(Audited.class)) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("No @Audited annotation on " + type.getName());
}
return result;
}
if (id == null) {
return result;
}
AuditQuery query = AuditReaderFactory.get(getEntityManager()).createQuery().forRevisionsOfEntity(type, false, true).addOrder(AuditEntity.revisionNumber().desc());
query.add(new IdentifierEqAuditExpression(null, id, true)).setMaxResults((max == null) ? 5 : max);
List resultList = query.getResultList();
if (resultList.isEmpty()) {
return result;
}
for (Object[] object : resultList) {
RevisionType rt = (RevisionType) object[2];
switch (rt) {
case ADD:
result.add(new RevInfo((T) object[0], RevInfo.TYPE.CREATE, (RevisionInfo) object[1]));
break;
case MOD:
result.add(new RevInfo((T) object[0], RevInfo.TYPE.UPDATE, (RevisionInfo) object[1]));
break;
case DEL:
result.add(new RevInfo((T) object[0], RevInfo.TYPE.DELETE, (RevisionInfo) object[1]));
break;
}
}
return result;
}
@Override
public List getRevisionNumbers(Object id, Class type) {
if (!type.isAnnotationPresent(Audited.class)) {
return Collections.emptyList();
}
return AuditReaderFactory.get(getEntityManager()).getRevisions(type, id);
}
}