+/*
+ * StorageService.java
+ *
+ * Copyright (C) 2001, 2002, 2003 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with any library licensed under the Apache Software License,
+ * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
+ * (or with modified versions of the above that use the same license as the above),
+ * and distribute linked combinations including the two. You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries. If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+
+package mir.core.service.storage;
+
+import java.util.List;
+
+import net.sf.hibernate.Criteria;
+import net.sf.hibernate.HibernateException;
+import net.sf.hibernate.Session;
+import net.sf.hibernate.SessionFactory;
+import net.sf.hibernate.Transaction;
+import net.sf.hibernate.expression.Expression;
+
+/**
+ *
+ * StorageService
+ * @author idefix
+ * @version $Id: StorageService.java,v 1.1 2003/08/17 19:11:49 idfx Exp $
+ */
+public abstract class StorageService {
+ private Class objectClass;
+ private SessionFactory factory;
+
+ public StorageService(Class objectClass, SessionFactory factory){
+ this.objectClass = objectClass;
+ this.factory = factory;
+ }
+
+ public List list(int offset, int limit){
+ return list(offset, limit, null);
+ }
+
+ public List list(int offset, int limit, Expression expression){
+ try {
+ Session session = factory.openSession();
+ Transaction transaction = session.beginTransaction();
+ Criteria criteria = session.createCriteria(objectClass);
+ if(expression != null){
+ System.out.println(expression.toString());
+ criteria = criteria.add(expression);
+ }
+ criteria.setFirstResult(offset)
+ .setMaxResults(limit);
+ List returnList = criteria.list();
+ transaction.commit();
+ session.close();
+ return returnList;
+ } catch (HibernateException e) {
+ throw new StorageServiceFailure(e);
+ }
+ }
+
+ public Object load(Integer id){
+ try {
+ Session session = factory.openSession();
+ Transaction transaction = session.beginTransaction();
+ Object returnObject = session.load(objectClass, id);
+ transaction.commit();
+ session.close();
+ return returnObject;
+ } catch (HibernateException e) {
+ throw new StorageServiceFailure(e);
+ }
+ }
+
+ public Integer add(Object newObject){
+ try {
+ Session session = factory.openSession();
+ Transaction transaction = session.beginTransaction();
+ Integer newid = (Integer)session.save(newObject);
+ session.close();
+ return newid;
+ } catch (HibernateException e) {
+ throw new StorageServiceFailure(e);
+ }
+ }
+
+ public void update(Object toUpdate){
+ try {
+ Session session = factory.openSession();
+ Transaction transaction = session.beginTransaction();
+ session.update(toUpdate);
+ session.close();
+ } catch (HibernateException e) {
+ throw new StorageServiceFailure(e);
+ }
+ }
+
+ public void delete(Object toDelete){
+ try {
+ Session session = factory.openSession();
+ Transaction transaction = session.beginTransaction();
+ session.delete(toDelete);
+ session.close();
+ } catch (HibernateException e) {
+ throw new StorageServiceFailure(e);
+ }
+ }
+
+}