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
020package org.crsh.vfs.spi.url;
021
022import org.crsh.vfs.spi.AbstractFSDriver;
023
024import java.io.IOException;
025import java.io.InputStream;
026import java.net.URISyntaxException;
027import java.net.URL;
028import java.util.ArrayList;
029import java.util.Iterator;
030
031/** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
032public 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 URLDriver merge(ClassLoader loader) throws IOException, URISyntaxException {
042    root.merge(loader);
043    return this;
044  }
045
046  public URLDriver merge(URL url) throws IOException, URISyntaxException {
047    root.mergeEntries(url);
048    return this;
049  }
050
051  public Node root() throws IOException {
052    return root;
053  }
054
055  public String name(Node handle) throws IOException {
056    return handle.name;
057  }
058
059  public boolean isDir(Node handle) throws IOException {
060    return handle.resources.isEmpty();
061  }
062
063  public Iterable<Node> children(Node handle) throws IOException {
064    return handle.children();
065  }
066
067  public long getLastModified(Node handle) throws IOException {
068    return handle.resources.isEmpty() ? 0 : handle.resources.peekFirst().lastModified;
069  }
070
071  public Iterator<InputStream> open(Node handle) throws IOException {
072    ArrayList<InputStream> list = new ArrayList<InputStream>(handle.resources.size());
073    for (Resource resource : handle.resources) {
074      list.add(resource.streamFactory.open());
075    }
076    return list.iterator();
077  }
078}