/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.persistence.orm.jpa;
import java.io.Serializable;
import java.util.Collections;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import org.smallmind.persistence.Durable;
import org.smallmind.persistence.UpdateMode;
import org.smallmind.persistence.cache.VectoredDao;
import org.smallmind.persistence.orm.ORMDao;
public abstract class JPADao<I extends Serializable & Comparable<I>, D extends Durable<I>> extends ORMDao<I, D, EntityManagerFactory, EntityManager> {
public JPADao (JPAProxySession proxySession) {
this(proxySession, null);
}
public JPADao (JPAProxySession proxySession, VectoredDao<I, D> vectoredDao) {
super(proxySession, vectoredDao);
}
public D get (Class<D> durableClass, I id) {
VectoredDao<I, D> vectoredDao;
D durable;
if ((vectoredDao = getVectoredDao()) == null) {
if ((durable = acquire(durableClass, id)) != null) {
return durable;
}
}
else {
if ((durable = vectoredDao.get(durableClass, id)) != null) {
return durable;
}
if ((durable = acquire(durableClass, id)) != null) {
return vectoredDao.persist(durableClass, durable, UpdateMode.SOFT);
}
}
return null;
}
@Override
public D acquire (Class<D> durableClass, I id) {
return durableClass.cast(getSession().getNativeSession().find(durableClass, id));
}
public D persist (Class<D> durableClass, D durable) {
D persistentDurable;
VectoredDao<I, D> vectoredDao = getVectoredDao();
if (getSession().getNativeSession().contains(durable)) {
persistentDurable = durable;
}
else {
persistentDurable = getManagedClass().cast(getSession().getNativeSession().merge(durable));
getSession().flush();
}
if (vectoredDao != null) {
return vectoredDao.persist(durableClass, persistentDurable, UpdateMode.HARD);
}
return persistentDurable;
}
public void delete (Class<D> durableClass, D durable) {
VectoredDao<I, D> vectoredDao = getVectoredDao();
if (!getSession().getNativeSession().contains(durable)) {
getSession().getNativeSession().remove(getSession().getNativeSession().find(durable.getClass(), durable.getId()));
}
else {
getSession().getNativeSession().remove(durable);
}
getSession().flush();
if (vectoredDao != null) {
vectoredDao.delete(durableClass, durable);
}
}
public List<D> list () {
return listByQuery(new QueryDetails() {
@Override
public String getQueryString () {
return "select entity from " + getManagedClass().getSimpleName() + " entity";
}
@Override
public Query completeQuery (Query query) {
return query;
}
});
}
public List<D> list (final int fetchSize) {
return listByQuery(new QueryDetails() {
@Override
public String getQueryString () {
return "select entity from " + getManagedClass().getSimpleName() + " entity";
}
@Override
public Query completeQuery (Query query) {
return query.setMaxResults(fetchSize);
}
});
}
public List<D> list (final I greaterThan, final int fetchSize) {
return listByQuery(new QueryDetails() {
@Override
public String getQueryString () {
return "select entity from " + getManagedClass().getSimpleName() + " entity where entity.id > ?";
}
@Override
public Query completeQuery (Query query) {
return query.setParameter("id", greaterThan).setMaxResults(fetchSize);
}
});
}
public Iterable<D> scroll () {
throw new UnsupportedOperationException();
}
public Iterable<D> scroll (int fetchSize) {
throw new UnsupportedOperationException();
}
public Iterable<D> scrollById (I greaterThan, int fetchSize) {
throw new UnsupportedOperationException();
}
public long size () {
throw new UnsupportedOperationException();
}
public D detach (D object) {
throw new UnsupportedOperationException("JPA has no explicit detached state");
}
public int executeWithQuery (QueryDetails queryDetails) {
return constructQuery(queryDetails).executeUpdate();
}
public <T> T findByQuery (Class<T> returnType, QueryDetails queryDetails) {
return returnType.cast(constructQuery(queryDetails).getSingleResult());
}
public D findByQuery (QueryDetails queryDetails) {
return getManagedClass().cast(constructQuery(queryDetails).getSingleResult());
}
public <T> List<T> listByQuery (Class<T> returnType, QueryDetails queryDetails) {
return Collections.checkedList(constructQuery(queryDetails).getResultList(), returnType);
}
public List<D> listByQuery (QueryDetails queryDetails) {
return Collections.checkedList(constructQuery(queryDetails).getResultList(), getManagedClass());
}
public Query constructQuery (QueryDetails queryDetails) {
return queryDetails.completeQuery(getSession().getNativeSession().createQuery(queryDetails.getQueryString()));
}
}