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Java > Open Source Codes > org > snipsnap > versioning > DefaultVersionManager


1 /*
2  * This file is part of "SnipSnap Wiki/Weblog".
3  *
4  * Copyright (c) 2002 Stephan J. Schmidt, Matthias L. Jugel
5  * All Rights Reserved.
6  *
7  * Please visit http://snipsnap.org/ for updates and contact.
8  *
9  * --LICENSE NOTICE--
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License
12  * as published by the Free Software Foundation; either version 2
13  * of the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23  * --LICENSE NOTICE--
24  */
25
26 package org.snipsnap.versioning;
27
28 import org.snipsnap.snip.Snip;
29
30 import java.util.List JavaDoc;
31
32 /**
33  * Manages revisions for snips
34  *
35  * @author Stephan J. Schmidt
36  * @version $Id: DefaultVersionManager.java 1648 2004-06-10 14:11:20Z leo $
37  */
38
39 public class DefaultVersionManager implements VersionManager {
40   private VersionStorage storage;
41   private DifferenceService service;
42
43   public DefaultVersionManager(VersionStorage storage, DifferenceService service) {
44     this.storage = storage;
45     this.service = service;
46   }
47
48   public void storeVersion(Snip snip) {
49     // Consistently increase the version of the snip
50 storage.storeVersion(snip);
51   };
52
53   public Snip loadVersion(Snip snip, int version) {
54     return storage.loadVersion(snip, version);
55   };
56
57   public List JavaDoc diff(Snip snip, int version1, int version2) {
58 // System.err.println("old="+version1);
59 // System.err.println("new="+version2);
60 return service.diff(loadVersion(snip, version1).getContent(), loadVersion(snip, version2).getContent());
61   }
62
63   public List JavaDoc getHistory(Snip snip) {
64     return storage.getVersionHistory(snip);
65   }
66 }
67
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