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Java > Open Source Codes > org > snipsnap > net > DiffServlet


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 package org.snipsnap.net;
26
27 import org.snipsnap.app.Application;
28 import org.snipsnap.config.Configuration;
29 import org.snipsnap.container.Components;
30 import org.snipsnap.snip.Snip;
31 import org.snipsnap.snip.SnipSpace;
32 import org.snipsnap.versioning.VersionManager;
33
34 import javax.servlet.RequestDispatcher JavaDoc;
35 import javax.servlet.ServletException JavaDoc;
36 import javax.servlet.http.HttpServlet JavaDoc;
37 import javax.servlet.http.HttpServletRequest JavaDoc;
38 import javax.servlet.http.HttpServletResponse JavaDoc;
39 import java.io.IOException JavaDoc;
40 import java.util.List JavaDoc;
41
42 /**
43  * Show the differences between two versions of a snip
44  *
45  * @author Matthias L. Jugel
46  * @version $Id: DiffServlet.java 1257 2003-12-11 13:36:55Z leo $
47  */
48 public class DiffServlet extends HttpServlet JavaDoc {
49
50   public void doGet(HttpServletRequest JavaDoc request, HttpServletResponse JavaDoc response)
51     throws IOException JavaDoc, ServletException JavaDoc {
52
53     String JavaDoc name = request.getParameter("name");
54     if (null == name) {
55       Configuration config = Application.get().getConfiguration();
56       response.sendRedirect(config.getUrl("/space/"+config.getStartSnip()));
57       return;
58     }
59     String JavaDoc oldString = request.getParameter("oldVersion");
60     String JavaDoc newString = request.getParameter("newVersion");
61     int oldVersion = Integer.parseInt(oldString);
62     int newVersion = Integer.parseInt(newString);
63
64     SnipSpace space = (SnipSpace)Components.getComponent(SnipSpace.class);
65     Snip snip = space.load(name);
66
67     VersionManager versionManager = (VersionManager) Components.getComponent(VersionManager.class);
68     List JavaDoc diff = versionManager.diff(snip, oldVersion, newVersion);
69
70     request.setAttribute("oldVersion", new Integer JavaDoc(oldVersion));
71     request.setAttribute("newVersion", new Integer JavaDoc(newVersion));
72     request.setAttribute("snip", snip);
73     request.setAttribute("diff", diff);
74     request.setAttribute("URI", request.getRequestURL().toString());
75
76     RequestDispatcher JavaDoc dispatcher = request.getRequestDispatcher("/exec/diff.jsp");
77     dispatcher.forward(request, response);
78   }
79 }
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