4 * Copyright (C) 2001, 2002, 2003 The Mir-coders group
6 * This file is part of Mir.
8 * Mir is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * Mir is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Mir; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * In addition, as a special exception, The Mir-coders gives permission to link
23 * the code of this program with any library licensed under the Apache Software License,
24 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
25 * (or with modified versions of the above that use the same license as the above),
26 * and distribute linked combinations including the two. You must obey the
27 * GNU General Public License in all respects for all of the code used other than
28 * the above mentioned libraries. If you modify this file, you may extend this
29 * exception to your version of the file, but you are not obligated to do so.
30 * If you do not wish to do so, delete this exception statement from your version.
33 package mir.core.service.storage;
35 import java.util.List;
37 import net.sf.hibernate.Criteria;
38 import net.sf.hibernate.HibernateException;
39 import net.sf.hibernate.Session;
40 import net.sf.hibernate.SessionFactory;
41 import net.sf.hibernate.Transaction;
42 import net.sf.hibernate.expression.Expression;
48 * @version $Id: StorageService.java,v 1.2 2003/08/19 00:42:38 idfx Exp $
50 public abstract class StorageService {
51 private Class objectClass;
52 private SessionHolder sessionHolder;
54 public StorageService(Class objectClass, SessionFactory factory){
55 this.objectClass = objectClass;
56 sessionHolder = new SessionHolder(factory);
59 public List list(int offset, int limit){
60 return list(offset, limit, null);
63 public List list(int offset, int limit, Expression expression){
65 Session session = sessionHolder.currentSession();
66 Transaction transaction = session.beginTransaction();
67 Criteria criteria = session.createCriteria(objectClass);
68 if(expression != null){
69 System.out.println(expression.toString());
70 criteria = criteria.add(expression);
72 criteria.setFirstResult(offset)
73 .setMaxResults(limit);
74 List returnList = criteria.list();
77 } catch (HibernateException e) {
78 throw new StorageServiceFailure(e);
82 public Object load(Integer id){
84 Session session = sessionHolder.currentSession();
85 Transaction transaction = session.beginTransaction();
86 Object returnObject = session.load(objectClass, id);
89 } catch (HibernateException e) {
90 throw new StorageServiceFailure(e);
94 public Integer add(Object newObject){
96 Session session = sessionHolder.currentSession();
97 Transaction transaction = session.beginTransaction();
98 Integer newid = (Integer)session.save(newObject);
101 } catch (HibernateException e) {
102 throw new StorageServiceFailure(e);
106 public void update(Object toUpdate){
108 Session session = sessionHolder.currentSession();
109 Transaction transaction = session.beginTransaction();
110 session.update(toUpdate);
111 transaction.commit();
112 } catch (HibernateException e) {
113 throw new StorageServiceFailure(e);
117 public void delete(Object toDelete){
119 Session session = sessionHolder.currentSession();
120 Transaction transaction = session.beginTransaction();
121 session.delete(toDelete);
122 transaction.commit();
123 } catch (HibernateException e) {
124 throw new StorageServiceFailure(e);
128 public void finalize() throws Throwable {
129 sessionHolder.closeSession();