2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.lang.reflect.Method;
34 import mir.entity.Entity;
35 import mir.storage.Database;
39 * helper class to resolve media handlers using reflection
45 public final class MediaHelper {
47 static String _classPrefix = "mircoders.media.MediaHandler";
49 public static MirMedia getHandler( Entity mediaType ) throws MediaExc, MediaFailure {
51 MirMedia mediaHandler;
52 String handlerName = mediaType.getValue("classname");
54 Class handlerClass = Class.forName(_classPrefix+handlerName);
55 return mediaHandler = (MirMedia)handlerClass.newInstance();
58 throw new MediaFailure("getHandler -- error in reflection " + e.toString(), e);
62 public static Database getStorage(Entity mediaType, String classPrefix) throws MediaExc, MediaFailure {
64 Database mediaStorage;
65 String storageName = mediaType.getValue("tablename");
67 Class storageClass = Class.forName(classPrefix+storageName);
68 Method m = storageClass.getMethod("getInstance", null);
69 return mediaStorage = (Database)m.invoke(null, null);
72 throw new MediaFailure("getStorage -- error in reflection " + e.toString(), e);