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Java > Open Source Codes > org > snipsnap > render > macro > ListOutputMacro


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.render.macro;
27
28 import org.radeox.util.Service;
29 import org.radeox.util.logging.Logger;
30 import org.snipsnap.render.macro.parameter.SnipMacroParameter;
31 import org.snipsnap.render.macro.list.ListFormatter;
32 import org.snipsnap.render.macro.list.SimpleList;
33 import org.snipsnap.render.macro.list.Linkable;
34
35 import java.io.IOException JavaDoc;
36 import java.io.Writer JavaDoc;
37 import java.util.Collection JavaDoc;
38 import java.util.HashMap JavaDoc;
39 import java.util.Iterator JavaDoc;
40 import java.util.Map JavaDoc;
41
42 /**
43  * Base class for macros outputting a list, e.g. user-list
44  *
45  * @author stephan
46  * @version $Id: ListOutputMacro.java 1606 2004-05-17 10:56:18Z leo $
47  */

48
49 public abstract class ListOutputMacro extends SnipMacro {
50
51   private static Map JavaDoc formatterMap = new HashMap JavaDoc();
52
53   static {
54     /* load all list formatter found in the services plugin control file */
55     Iterator JavaDoc macroIt = Service.providers(ListFormatter.class);
56     while (macroIt.hasNext()) {
57       try {
58         ListFormatter formatter = (ListFormatter) macroIt.next();
59         formatterMap.put(formatter.getName().toLowerCase(), formatter);
60         Logger.debug("Loaded list formatter: " + formatter.getName());
61       } catch (Exception JavaDoc e) {
62         Logger.warn("ListOutputMacro: unable to load list formatter", e);
63       }
64     }
65
66   }
67
68   private final static ListFormatter defaultFormatter = new SimpleList();
69
70   public void output(Writer JavaDoc writer, Linkable root, String JavaDoc listComment, Collection JavaDoc c, String JavaDoc emptyText, String JavaDoc style, boolean showSize) throws IOException JavaDoc {
71     ListFormatter formatter = (ListFormatter) ListOutputMacro.formatterMap.get(style != null ? style.toLowerCase() : null);
72
73     if (formatter != null) {
74       formatter.format(writer, root, listComment, c, emptyText, showSize);
75     } else {
76       ListOutputMacro.defaultFormatter.format(writer, root, listComment, c, emptyText, showSize);
77     }
78   }
79
80
81   public abstract void execute(Writer JavaDoc writer, SnipMacroParameter params) throws IllegalArgumentException JavaDoc, IOException JavaDoc;
82 }
83
84
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