Mercurial > hg > digilib-old
diff servlet/src/digilib/io/AliasingDocuDirCache.java @ 339:6d2032b6121d gen2_1
new directory and cache work
author | robcast |
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date | Wed, 17 Nov 2004 18:17:34 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/servlet/src/digilib/io/AliasingDocuDirCache.java Wed Nov 17 18:17:34 2004 +0100 @@ -0,0 +1,91 @@ +/* + * AliasingDocuDirCache -- DocuDirCache using alias entries from config file + * + * Digital Image Library servlet components + * + * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * Please read license.txt for the full details. A copy of the GPL may be found + * at http://www.gnu.org/copyleft/lgpl.html + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place, Suite 330, Boston, MA 02111-1307 USA + * + * Created on 04.11.2003 + */ + +package digilib.io; + +import java.io.File; +import java.util.Iterator; +import java.util.Map; + +/** + * @author casties + * + */ +public class AliasingDocuDirCache extends DocuDirCache { + + /** + * @param baseDirs + * @param fileClasses + * @param confFileName + * @throws FileOpException + */ + public AliasingDocuDirCache(File confFile) throws FileOpException { + // create standard DocuDirCache + super(); + Map pathMap = null; + // read alias config file + try { + // load into pathMap + XMLListLoader mapLoader = new XMLListLoader("digilib-aliases", + "mapping", "link", "dir"); + pathMap = mapLoader.loadURL(confFile.toURL().toString()); + } catch (Exception e) { + throw new FileOpException("ERROR loading mapping file: " + e); + } + if (pathMap == null) { + throw new FileOpException("ERROR: unable to load mapping file!"); + } + + /* + * load map entries into cache + */ + + for (Iterator i = pathMap.keySet().iterator(); i.hasNext();) { + String link = FileOps.normalName((String) i.next()); + String dn = (String) pathMap.get(link); + File dir = FileOps.getRealFile(dn); + if (dir.isDirectory()) { + logger.debug("Aliasing dir: " + link); + DigiDirectory destDir = new DigiDirectory(dir, dn, null); + // add the alias name + putName(link, destDir); + // add the real dir + putDir(destDir); + } + } + } + + /** + * Adds a DocuDirectory under another name to the cache. + * + * @param name + * @param newdir + */ + public void putName(String name, DigiDirectory newdir) { + Object oldkey = map.put(name, newdir); + if (oldkey != null) { + logger + .warn("Duplicate key in AliasingDocuDirCache.put -- replaced!"); + } + } + +}