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.util.Utils; 023 import org.crsh.vfs.spi.AbstractFSDriver; 024 025 import java.io.File; 026 import java.io.FileInputStream; 027 import java.io.IOException; 028 import java.io.InputStream; 029 import java.util.Arrays; 030 import java.util.Collections; 031 import java.util.Iterator; 032 033 public class FileDriver extends AbstractFSDriver<File> { 034 035 /** . */ 036 private final File root; 037 038 /** 039 * Create a new file driver. 040 * 041 * @param root the root 042 * @throws NullPointerException if the root argument is null 043 */ 044 public FileDriver(File root) throws NullPointerException { 045 if (root == null) { 046 throw new NullPointerException(); 047 } 048 049 // 050 this.root = root; 051 } 052 053 public File root() throws IOException { 054 return root; 055 } 056 057 public String name(File handle) throws IOException { 058 return handle.getName(); 059 } 060 061 public boolean isDir(File handle) throws IOException { 062 return handle.isDirectory(); 063 } 064 065 public Iterable<File> children(File handle) throws IOException { 066 File[] files = handle.listFiles(); 067 return files != null ? Arrays.asList(files) : Collections.<File>emptyList(); 068 } 069 070 public long getLastModified(File handle) throws IOException { 071 return handle.lastModified(); 072 } 073 074 public Iterator<InputStream> open(File handle) throws IOException { 075 return Utils.<InputStream>iterator(new FileInputStream(handle)); 076 } 077 }