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 mir.core.model.IImage;
38 import net.sf.hibernate.Criteria;
39 import net.sf.hibernate.Hibernate;
40 import net.sf.hibernate.HibernateException;
41 import net.sf.hibernate.Session;
42 import net.sf.hibernate.SessionFactory;
43 import net.sf.hibernate.Transaction;
44 import net.sf.hibernate.expression.Expression;
50 * @version $Id: StorageService.java,v 1.3 2003/09/05 20:23:59 idfx Exp $
52 public abstract class StorageService {
53 private Class objectClass;
54 private SessionHolder sessionHolder;
56 public StorageService(Class objectClass, SessionFactory factory){
57 this.objectClass = objectClass;
58 sessionHolder = new SessionHolder(factory);
61 public List list(int offset, int limit){
62 return list(offset, limit, null);
65 public List list(int offset, int limit, Expression expression){
67 Session session = sessionHolder.currentSession();
68 Transaction transaction = session.beginTransaction();
69 Criteria criteria = session.createCriteria(objectClass);
70 if(expression != null){
71 System.out.println(expression.toString());
72 criteria = criteria.add(expression);
74 criteria.setFirstResult(offset)
75 .setMaxResults(limit);
76 List returnList = criteria.list();
78 sessionHolder.closeSession();
80 } catch (HibernateException e) {
81 throw new StorageServiceFailure(e);
85 public Object load(Integer id){
87 Session session = sessionHolder.currentSession();
88 Transaction transaction = session.beginTransaction();
89 Object returnObject = session.load(objectClass, id);
90 initializeLazyCollections(returnObject);
92 sessionHolder.closeSession();
94 } catch (HibernateException e) {
95 throw new StorageServiceFailure(e);
100 * @param returnObject
102 protected abstract void initializeLazyCollections(Object returnObject)
103 throws HibernateException;
105 public Integer add(Object newObject){
107 Session session = sessionHolder.currentSession();
108 Transaction transaction = session.beginTransaction();
109 Integer newid = (Integer)session.save(newObject);
110 transaction.commit();
112 } catch (HibernateException e) {
113 throw new StorageServiceFailure(e);
117 public void update(Object toUpdate){
119 Session session = sessionHolder.currentSession();
120 Transaction transaction = session.beginTransaction();
121 session.update(toUpdate);
122 transaction.commit();
123 } catch (HibernateException e) {
124 throw new StorageServiceFailure(e);
128 public void delete(Object toDelete){
130 Session session = sessionHolder.currentSession();
131 Transaction transaction = session.beginTransaction();
132 session.delete(toDelete);
133 transaction.commit();
134 } catch (HibernateException e) {
135 throw new StorageServiceFailure(e);
139 public void finalize() throws Throwable {
140 sessionHolder.closeSession();