001    /*
002     * This file is part of muCommander, http://www.mucommander.com
003     * Copyright (C) 2002-2008 Maxence Bernard
004     *
005     * muCommander is free software; you can redistribute it and/or modify
006     * it under the terms of the GNU General Public License as published by
007     * the Free Software Foundation; either version 3 of the License, or
008     * (at your option) any later version.
009     *
010     * muCommander is distributed in the hope that it will be useful,
011     * but WITHOUT ANY WARRANTY; without even the implied warranty of
012     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013     * GNU General Public License for more details.
014     *
015     * You should have received a copy of the GNU General Public License
016     * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017     */
018    
019    package com.mucommander.bookmark.file;
020    
021    import com.mucommander.bookmark.Bookmark;
022    import com.mucommander.bookmark.BookmarkManager;
023    import com.mucommander.file.AbstractFile;
024    import com.mucommander.file.FileFactory;
025    import com.mucommander.file.FileURL;
026    import com.mucommander.file.ProtocolProvider;
027    
028    import java.io.IOException;
029    
030    /**
031     * This class is the provider for the bookmark filesystem implemented by {@link com.mucommander.bookmark.file.BookmarkFile}.
032     *
033     * @author Nicolas Rinaudo
034     * @see com.mucommander.bookmark.file.BookmarkFile
035     */
036    public class BookmarkProtocolProvider implements ProtocolProvider {
037    
038        public AbstractFile getFile(FileURL url) throws IOException {
039            // If the URL contains a path but no host, it's illegal.
040            // If it contains neither host nor path, we're browsing bookmarks://
041            if(url.getHost() == null) {
042                if(url.getPath().equals("/"))
043                    return new BookmarkRoot(url);
044                throw new IOException();
045            }
046    
047            // If the URL contains a host, look it up in the bookmark list and use that
048            // as the root of the returned path.
049            else {
050                Bookmark bookmark;
051                // If the bookmark doesn't exist, but a path is specified, throws an exception.
052                // Otherwise, returns the requested bookmark.
053                if((bookmark = BookmarkManager.getBookmark(url.getHost())) == null) {
054                    if(!url.getPath().equals("/"))
055                        throw new IOException();
056                    return new BookmarkFile(new Bookmark(url.getHost(), url.getPath()));
057                }
058    
059                // If the bookmark exists, and a path is specified, creates a new path
060                // from the bookmark's location and the specified path.
061                if(!url.getPath().equals("/"))
062                    return FileFactory.getFile(bookmark.getLocation() + url.getPath());
063    
064                // Otherwise, creates a new bookmark file.
065                return new BookmarkFile(bookmark);
066            }
067        }
068    }