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 java.io.IOException;
023 import java.util.ArrayList;
024 import java.util.Collections;
025 import java.util.Iterator;
026 import java.util.LinkedHashMap;
027 import java.util.LinkedList;
028 import java.util.List;
029
030 public final class File {
031
032 /** . */
033 private final FS fs;
034
035 /** . */
036 private final Path path;
037
038 /** . */
039 private LinkedList<Handle<?>> handles;
040
041 /** . */
042 private LinkedHashMap<Key, File> children;
043
044 public File(FS fs, Path path) {
045 this.fs = fs;
046 this.path = path;
047 this.handles = null;
048 }
049
050 public Path getPath() {
051 return path;
052 }
053
054 public boolean isDir() {
055 return path.isDir();
056 }
057
058 public String getName() {
059 return path.getName();
060 }
061
062 public Resource getResource() throws IOException {
063 if (path.isDir()) {
064 throw new IllegalStateException("Cannot get url of a dir");
065 }
066 Handle handle = getHandles().peekFirst();
067 return handle != null ? handle.getResource() : null;
068
069 }
070
071 public Iterable<Resource> getResources() throws IOException {
072 if (path.isDir()) {
073 throw new IllegalStateException("Cannot get url of a dir");
074 }
075 List<Resource> urls = Collections.emptyList();
076 for (Handle<?> handle : getHandles()) {
077 if (urls.isEmpty()) {
078 urls = new ArrayList<Resource>();
079 }
080 Iterator<Resource> resources = handle.getResources();
081 while (resources.hasNext()) {
082 Resource resource = resources.next();
083 urls.add(resource);
084 }
085 }
086 return urls;
087 }
088
089 public File child(String name, boolean dir) throws IOException {
090 if (children == null) {
091 children();
092 }
093 return children.get(new Key(name, dir));
094 }
095
096 public Iterable<File> children() throws IOException {
097 if (children == null) {
098 LinkedHashMap<Key, File> children = new LinkedHashMap<Key, File>();
099 for (Handle<?> handle : getHandles()) {
100 for (Handle<?> childHandle : handle.children()) {
101 File child = children.get(childHandle.key);
102 if (child == null) {
103 child = new File(fs, Path.get(path, childHandle.key.name, childHandle.key.dir));
104 children.put(childHandle.key, child);
105 }
106 if (child.handles == null) {
107 child.handles = new LinkedList<Handle<?>>();
108 }
109 child.handles.add(childHandle);
110 }
111 }
112 this.children = children;
113 }
114 return children.values();
115 }
116
117 LinkedList<Handle<?>> getHandles() {
118 if (handles == null) {
119 LinkedList<Handle<?>> handles = new LinkedList<Handle<?>>();
120 for (Mount<?> mount : fs.mounts) {
121 Handle<?> handle = null;
122 try {
123 handle = mount.getHandle(path);
124 }
125 catch (IOException e) {
126 e.printStackTrace();
127 }
128 if (handle != null) {
129 handles.add(handle);
130 }
131 }
132 this.handles = handles;
133 }
134 return handles;
135 }
136
137 @Override
138 public String toString() {
139 return "File[path=" + path.getValue() + "]";
140 }
141 }