001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.vfs.spi.file;
020    
021    import org.crsh.vfs.Path;
022    import org.crsh.vfs.spi.FSMountFactory;
023    import org.crsh.vfs.spi.Mount;
024    
025    import java.io.File;
026    import java.io.IOException;
027    
028    /**
029     * @author Julien Viet
030     */
031    public class FileMountFactory implements FSMountFactory<File> {
032    
033      /** . */
034      private final File root;
035    
036      /** . */
037      private final File absoluteRoot;
038    
039      public FileMountFactory(File root) throws IOException {
040        if (root == null) {
041          throw new NullPointerException();
042        }
043    
044        //
045        File absoluteRoot = root;
046        while (true) {
047          File parent = absoluteRoot.getParentFile();
048          if (parent != null && parent.isDirectory()) {
049            absoluteRoot = parent;
050          } else {
051            break;
052          }
053        }
054    
055        //
056        this.root = root;
057        this.absoluteRoot = absoluteRoot;
058      }
059    
060      @Override
061      public Mount<File> create(Path path) throws IOException {
062        File file = path.isAbsolute() ? absoluteRoot : root;
063        for (String name : path) {
064          file = new File(file, name);
065        }
066        // Always use absolute path here
067        return new Mount<File>(new FileDriver(file), "file:" + file.getAbsolutePath());
068      }
069    }