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176
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1 /*
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2 * AliasingDocuDirCache -- DocuDirCache using alias entries from config file
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3 *
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4 * Digital Image Library servlet components
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5 *
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6 * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
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7 *
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8 * This program is free software; you can redistribute it and/or modify it
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9 * under the terms of the GNU General Public License as published by the Free
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10 * Software Foundation; either version 2 of the License, or (at your option)
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11 * any later version.
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12 *
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13 * Please read license.txt for the full details. A copy of the GPL may be found
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14 * at http://www.gnu.org/copyleft/lgpl.html
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15 *
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16 * You should have received a copy of the GNU General Public License along with
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17 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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18 * Place, Suite 330, Boston, MA 02111-1307 USA
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19 *
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20 * Created on 04.11.2003
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21 */
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22
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23 package digilib.io;
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24
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25 import java.io.File;
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268
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26 import java.util.Map;
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531
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27 import java.util.Map.Entry;
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176
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28
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563
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29 import digilib.io.FileOps.FileClass;
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259
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30 import digilib.servlet.DigilibConfiguration;
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590
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31 import digilib.util.XMLListLoader;
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259
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32
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176
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33 /**
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34 * @author casties
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35 *
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36 */
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37 public class AliasingDocuDirCache extends DocuDirCache {
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38
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39 /**
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40 * @param baseDirs
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563
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41 * @param fcs
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176
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42 * @param confFileName
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43 * @throws FileOpException
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44 */
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563
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45 public AliasingDocuDirCache(String[] baseDirs, FileClass[] fcs,
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259
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46 File confFile, DigilibConfiguration dlConfig)
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47 throws FileOpException {
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176
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48 // create standard DocuDirCache
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563
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49 super(baseDirs, fcs, dlConfig);
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50 Map<String,String> pathMap = null;
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176
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51 // read alias config file
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52 try {
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53 // load into pathMap
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259
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54 XMLListLoader mapLoader = new XMLListLoader("digilib-aliases",
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55 "mapping", "link", "dir");
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176
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56 pathMap = mapLoader.loadURL(confFile.toURL().toString());
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57 } catch (Exception e) {
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58 throw new FileOpException("ERROR loading mapping file: " + e);
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59 }
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60 if (pathMap == null) {
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197
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61 throw new FileOpException("ERROR: unable to load mapping file!");
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176
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62 }
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63
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64 /*
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65 * load map entries into cache
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66 */
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259
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67
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68 for (Entry<String, String> linkdir: pathMap.entrySet()) {
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69 if (linkdir.getValue() == null) {
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350
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70 logger.error("Key mismatch in mapping file!");
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71 break;
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72 }
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73 DocuDirectory destDir = new DocuDirectory(linkdir.getValue(), this);
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176
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74 if (destDir.isValid()) {
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75 logger.debug("Aliasing dir: " + linkdir.getKey());
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176
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76 // add the alias name
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77 putName(FileOps.normalName(linkdir.getKey()), destDir);
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176
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78 // add the real dir
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79 putDir(destDir);
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80 }
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81 }
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82 }
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83
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259
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84 /**
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85 * Adds a DocuDirectory under another name to the cache.
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176
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86 *
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259
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87 * @param name
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176
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88 * @param newdir
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89 */
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531
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90 public void putName(String name, DocuDirectory newdir) {
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91 if (map.containsKey(name)) {
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92 logger.warn("Duplicate key in AliasingDocuDirCache.put -- ignored!");
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93 } else {
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94 map.put(name, newdir);
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95 }
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96 }
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259
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97
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176
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98 }
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