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; 021 022 import org.crsh.util.Utils; 023 import org.crsh.vfs.spi.FSDriver; 024 025 import java.io.IOException; 026 import java.io.InputStream; 027 import java.util.ArrayList; 028 import java.util.Iterator; 029 import java.util.LinkedList; 030 import java.util.List; 031 032 class Handle<H> { 033 034 /** . */ 035 private final FSDriver<H> driver; 036 037 /** . */ 038 final String name; 039 040 /** . */ 041 final H handle; 042 043 Handle(FSDriver<H> driver, H handle) throws IOException { 044 String name = driver.name(handle); 045 046 // 047 this.driver = driver; 048 this.handle = handle; 049 this.name = name; 050 } 051 052 Iterable<Handle<H>> children() throws IOException { 053 List<Handle<H>> children = new ArrayList<Handle<H>>(); 054 for (H h : driver.children(handle)) { 055 children.add(new Handle<H>(driver, h)); 056 } 057 return children; 058 } 059 060 Resource getResource() throws IOException { 061 InputStream in = open(); 062 byte[] bytes = Utils.readAsBytes(in); 063 long lastModified = getLastModified(); 064 return new Resource(name, bytes, lastModified); 065 } 066 067 Iterator<Resource> getResources() throws IOException { 068 Iterator<InputStream> i = driver.open(handle); 069 if (i.hasNext()) { 070 LinkedList<Resource> resources = new LinkedList<Resource>(); 071 while (i.hasNext()) { 072 InputStream in = i.next(); 073 byte[] bytes = Utils.readAsBytes(in); 074 long lastModified = getLastModified(); 075 resources.add(new Resource(name, bytes, lastModified)); 076 } 077 return resources.iterator(); 078 } else { 079 return Utils.iterator(); 080 } 081 } 082 083 private InputStream open() throws IOException { 084 Iterator<InputStream> i = driver.open(handle); 085 if (i.hasNext()) { 086 return i.next(); 087 } else { 088 throw new IOException("No stream"); 089 } 090 } 091 092 long getLastModified() throws IOException { 093 return driver.getLastModified(handle); 094 } 095 }