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.spi.url;
021    
022    import org.crsh.vfs.spi.AbstractFSDriver;
023    
024    import java.io.IOException;
025    import java.io.InputStream;
026    import java.net.URISyntaxException;
027    import java.net.URL;
028    import java.util.ArrayList;
029    import java.util.Iterator;
030    
031    /** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
032    public class URLDriver extends AbstractFSDriver<Node> {
033    
034      /** . */
035      private final Node root;
036    
037      public URLDriver() {
038        this.root = new Node();
039      }
040    
041      public void merge(ClassLoader loader) throws IOException, URISyntaxException {
042        root.merge(loader);
043      }
044    
045      public void merge(URL url) throws IOException, URISyntaxException {
046        root.mergeEntries(url);
047      }
048    
049      public Node root() throws IOException {
050        return root;
051      }
052    
053      public String name(Node handle) throws IOException {
054        return handle.name;
055      }
056    
057      public boolean isDir(Node handle) throws IOException {
058        return handle.resources.isEmpty();
059      }
060    
061      public Iterable<Node> children(Node handle) throws IOException {
062        return handle.children();
063      }
064    
065      public long getLastModified(Node handle) throws IOException {
066        return handle.resources.isEmpty() ? 0 : handle.resources.peekFirst().lastModified;
067      }
068    
069      public Iterator<InputStream> open(Node handle) throws IOException {
070        ArrayList<InputStream> list = new ArrayList<InputStream>(handle.resources.size());
071        for (Resource resource : handle.resources) {
072          list.add(resource.streamFactory.open());
073        }
074        return list.iterator();
075      }
076    }