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    
020    package org.crsh.vfs;
021    
022    import org.crsh.util.IO;
023    import org.crsh.vfs.spi.FSDriver;
024    
025    import java.io.IOException;
026    import java.io.InputStream;
027    import java.util.ArrayList;
028    import java.util.List;
029    
030    class Handle<H> {
031    
032      /** . */
033      private final FSDriver<H> driver;
034    
035      /** . */
036      final Key key;
037    
038      /** . */
039      final H handle;
040    
041      Handle(FSDriver<H> driver, H handle) throws IOException {
042        String name = driver.name(handle);
043        boolean dir = driver.isDir(handle);
044    
045        //
046        this.driver = driver;
047        this.handle = handle;
048        this.key = new Key(name, dir);
049      }
050    
051      Iterable<Handle<H>> children() throws IOException {
052        List<Handle<H>> children = new ArrayList<Handle<H>>();
053        for (H h : driver.children(handle)) {
054          children.add(new Handle<H>(driver, h));
055        }
056        return children;
057      }
058    
059      Resource getResource() throws IOException {
060        InputStream in = open();
061        byte[] bytes = IO.readAsBytes(in);
062        long lastModified = getLastModified();
063        return new Resource(bytes, lastModified);
064      }
065    
066      InputStream open() throws IOException {
067        return driver.open(handle);
068      }
069    
070      long getLastModified() throws IOException {
071        return driver.getLastModified(handle);
072      }
073    }