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.file; 021 022 import org.crsh.vfs.spi.AbstractFSDriver; 023 024 import java.io.File; 025 import java.io.FileInputStream; 026 import java.io.IOException; 027 import java.io.InputStream; 028 import java.util.Arrays; 029 import java.util.Collections; 030 031 public class FileDriver extends AbstractFSDriver<File> { 032 033 /** . */ 034 private final File root; 035 036 /** 037 * Create a new file driver. 038 * 039 * @param root the root 040 * @throws NullPointerException if the root argument is null 041 */ 042 public FileDriver(File root) throws NullPointerException { 043 if (root == null) { 044 throw new NullPointerException(); 045 } 046 047 // 048 this.root = root; 049 } 050 051 public File root() throws IOException { 052 return root; 053 } 054 055 public String name(File handle) throws IOException { 056 return handle.getName(); 057 } 058 059 public boolean isDir(File handle) throws IOException { 060 return handle.isDirectory(); 061 } 062 063 public Iterable<File> children(File handle) throws IOException { 064 File[] files = handle.listFiles(); 065 return files != null ? Arrays.asList(files) : Collections.<File>emptyList(); 066 } 067 068 public long getLastModified(File handle) throws IOException { 069 return handle.lastModified(); 070 } 071 072 public InputStream open(File handle) throws IOException { 073 return new FileInputStream(handle); 074 } 075 }