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.config.MirPropertiesConfiguration;
38 import mir.config.MirPropertiesConfiguration.PropertiesConfigExc;
39 import net.sf.hibernate.Criteria;
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 1.4 2003/09/07 16:55:00 idfx Exp $
52 public abstract class StorageService {
53 private Class objectClass;
54 private SessionHolder sessionHolder;
55 protected MirPropertiesConfiguration _configuration;
57 public StorageService(Class objectClass, SessionFactory factory){
58 this.objectClass = objectClass;
59 sessionHolder = new SessionHolder(factory);
61 _configuration = MirPropertiesConfiguration.instance();
62 } catch (PropertiesConfigExc e) {
63 throw new multex.Failure("could not get the config", e);
67 public List list(int offset, int limit){
68 return list(offset, limit, null);
71 public List list(int offset){
72 int limit = _configuration.getInt("ServletModule.Default.ListSize");
73 return list(offset, limit, null);
76 public List list(int offset, Expression expression){
77 int limit = _configuration.getInt("ServletModule.Default.ListSize");
78 return list(offset, limit, expression);
80 public List list(int offset, int limit, Expression expression){
82 Session session = sessionHolder.currentSession();
83 Transaction transaction = session.beginTransaction();
84 Criteria criteria = session.createCriteria(objectClass);
85 if(expression != null){
86 System.out.println(expression.toString());
87 criteria = criteria.add(expression);
89 criteria.setFirstResult(offset)
90 .setMaxResults(limit);
91 List returnList = criteria.list();
93 sessionHolder.closeSession();
95 } catch (HibernateException e) {
96 throw new StorageServiceFailure(e);
100 public Object load(Integer id){
102 Session session = sessionHolder.currentSession();
103 Transaction transaction = session.beginTransaction();
104 Object returnObject = session.load(objectClass, id);
105 initializeLazyCollections(returnObject);
106 transaction.commit();
107 sessionHolder.closeSession();
109 } catch (HibernateException e) {
110 throw new StorageServiceFailure(e);
115 * @param returnObject
117 protected abstract void initializeLazyCollections(Object returnObject)
118 throws HibernateException;
120 public Integer add(Object newObject){
122 Session session = sessionHolder.currentSession();
123 Transaction transaction = session.beginTransaction();
124 Integer newid = (Integer)session.save(newObject);
125 transaction.commit();
127 } catch (HibernateException e) {
128 throw new StorageServiceFailure(e);
132 public void update(Object toUpdate){
134 Session session = sessionHolder.currentSession();
135 Transaction transaction = session.beginTransaction();
136 session.update(toUpdate);
137 transaction.commit();
138 } catch (HibernateException e) {
139 throw new StorageServiceFailure(e);
143 public void delete(Object toDelete){
145 Session session = sessionHolder.currentSession();
146 Transaction transaction = session.beginTransaction();
147 session.delete(toDelete);
148 transaction.commit();
149 } catch (HibernateException e) {
150 throw new StorageServiceFailure(e);
154 public void finalize() throws Throwable {
155 sessionHolder.closeSession();