001 /* 002 * Copyright (C) 2010 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.file; 021 022 import org.crsh.vfs.spi.AbstractFSDriver; 023 024 import java.io.File; 025 import java.io.IOException; 026 import java.net.URL; 027 import java.util.Arrays; 028 import java.util.Collections; 029 030 /** 031 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 032 * @version $Revision$ 033 */ 034 public class FileDriver extends AbstractFSDriver<File> { 035 036 /** . */ 037 private final File root; 038 039 /** 040 * Create a new file driver. 041 * 042 * @param root the root 043 * @throws NullPointerException if the root argument is null 044 */ 045 public FileDriver(File root) throws NullPointerException { 046 if (root == null) { 047 throw new NullPointerException(); 048 } 049 050 // 051 this.root = root; 052 } 053 054 public File root() throws IOException { 055 return root; 056 } 057 058 public String name(File handle) throws IOException { 059 return handle.getName(); 060 } 061 062 public boolean isDir(File handle) throws IOException { 063 return handle.isDirectory(); 064 } 065 066 public Iterable<File> children(File handle) throws IOException { 067 File[] files = handle.listFiles(); 068 return files != null ? Arrays.asList(files) : Collections.<File>emptyList(); 069 } 070 071 public URL toURL(File handle) throws IOException { 072 return handle.toURI().toURL(); 073 } 074 }