NullVersionManager


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  ;
31  import java.util.ArrayList  ;
32  
33  /**
34   * VersionManager that does nothing, if the user
35   * does not want versioning
36   *
37   * Just return the snip or empty lists, noone should call these
38   * as the GUI for version etc should be turned off. Some sane
39   * values for those who do call this.
40   *
41   * @author Stephan J. Schmidt
42   * @version $Id: NullVersionManager.java 1257 2003-12-11 13:36:55Z leo $
43   */
44  
45  public class NullVersionManager implements VersionManager {
46  
47    public NullVersionManager() {
48    }
49  
50    public void storeVersion(Snip snip) {
51    };
52  
53    public Snip loadVersion(Snip snip, int version) {
54      return snip;
55    };
56  
57    public List   diff(Snip snip, int version1, int version2) {
58      return new ArrayList  ();
59    }
60  
61    public List   getHistory(Snip snip) {
62      return new ArrayList  ();
63    }
64  }
65
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