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comparison servlet/src/digilib/io/AliasingDocuDirCache.java @ 339:6d2032b6121d gen2_1

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new directory and cache work
author robcast
date Wed, 17 Nov 2004 18:17:34 +0100
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3:794a9f25f15c 339:6d2032b6121d
1 /*
2 * AliasingDocuDirCache -- DocuDirCache using alias entries from config file
3 *
4 * Digital Image Library servlet components
5 *
6 * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * Please read license.txt for the full details. A copy of the GPL may be found
14 * at http://www.gnu.org/copyleft/lgpl.html
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
18 * Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * Created on 04.11.2003
21 */
22
23 package digilib.io;
24
25 import java.io.File;
26 import java.util.Iterator;
27 import java.util.Map;
28
29 /**
30 * @author casties
31 *
32 */
33 public class AliasingDocuDirCache extends DocuDirCache {
34
35 /**
36 * @param baseDirs
37 * @param fileClasses
38 * @param confFileName
39 * @throws FileOpException
40 */
41 public AliasingDocuDirCache(File confFile) throws FileOpException {
42 // create standard DocuDirCache
43 super();
44 Map pathMap = null;
45 // read alias config file
46 try {
47 // load into pathMap
48 XMLListLoader mapLoader = new XMLListLoader("digilib-aliases",
49 "mapping", "link", "dir");
50 pathMap = mapLoader.loadURL(confFile.toURL().toString());
51 } catch (Exception e) {
52 throw new FileOpException("ERROR loading mapping file: " + e);
53 }
54 if (pathMap == null) {
55 throw new FileOpException("ERROR: unable to load mapping file!");
56 }
57
58 /*
59 * load map entries into cache
60 */
61
62 for (Iterator i = pathMap.keySet().iterator(); i.hasNext();) {
63 String link = FileOps.normalName((String) i.next());
64 String dn = (String) pathMap.get(link);
65 File dir = FileOps.getRealFile(dn);
66 if (dir.isDirectory()) {
67 logger.debug("Aliasing dir: " + link);
68 DigiDirectory destDir = new DigiDirectory(dir, dn, null);
69 // add the alias name
70 putName(link, destDir);
71 // add the real dir
72 putDir(destDir);
73 }
74 }
75 }
76
77 /**
78 * Adds a DocuDirectory under another name to the cache.
79 *
80 * @param name
81 * @param newdir
82 */
83 public void putName(String name, DigiDirectory newdir) {
84 Object oldkey = map.put(name, newdir);
85 if (oldkey != null) {
86 logger
87 .warn("Duplicate key in AliasingDocuDirCache.put -- replaced!");
88 }
89 }
90
91 }