1 /*
2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.*;
29 import java.nio.channels.*;
30 import java.nio.file.*;
31 import java.nio.file.DirectoryStream.Filter;
32 import java.nio.file.attribute.*;
33 import java.nio.file.spi.FileSystemProvider;
34 import java.net.URI;
35 import java.net.URISyntaxException;
36 import java.util.HashMap;
37 import java.util.Map;
38 import java.util.Set;
39 import java.util.zip.ZipException;
40 import java.util.concurrent.ExecutorService;
41
42 /*
43 *
44 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
45 */
46
47 public class ZipFileSystemProvider extends FileSystemProvider {
48
49
50 private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
51
52 public ZipFileSystemProvider() {}
53
54 @Override
55 public String getScheme() {
56 return "jar";
57 }
58
59 protected Path uriToPath(URI uri) {
60 String scheme = uri.getScheme();
61 if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
62 throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
63 }
64 try {
65 // only support legacy JAR URL syntax jar:{uri}!/{entry} for now
66 String spec = uri.getRawSchemeSpecificPart();
67 int sep = spec.indexOf("!/");
68 if (sep != -1) {
69 spec = spec.substring(0, sep);
70 }
71 return Paths.get(new URI(spec)).toAbsolutePath();
72 } catch (URISyntaxException e) {
73 throw new IllegalArgumentException(e.getMessage(), e);
74 }
75 }
76
77 private boolean ensureFile(Path path) {
78 try {
79 BasicFileAttributes attrs =
80 Files.readAttributes(path, BasicFileAttributes.class);
81 if (!attrs.isRegularFile())
82 throw new UnsupportedOperationException();
83 return true;
84 } catch (IOException ioe) {
85 return false;
86 }
87 }
88
89 @Override
90 public FileSystem newFileSystem(URI uri, Map<String, ?> env)
91 throws IOException
92 {
93 Path path = uriToPath(uri);
94 synchronized(filesystems) {
95 Path realPath = null;
96 if (ensureFile(path)) {
97 realPath = path.toRealPath();
98 if (filesystems.containsKey(realPath))
99 throw new FileSystemAlreadyExistsException();
100 }
101 ZipFileSystem zipfs = null;
102 try {
103 if (env.containsKey("multi-release")) {
104 zipfs = new JarFileSystem(this, path, env);
105 } else {
106 zipfs = new ZipFileSystem(this, path, env);
107 }
108 } catch (ZipException ze) {
109 String pname = path.toString();
110 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
111 throw ze;
112 // assume NOT a zip/jar file
113 throw new UnsupportedOperationException();
114 }
115 if (realPath == null) { // newly created
116 realPath = path.toRealPath();
117 }
118 filesystems.put(realPath, zipfs);
119 return zipfs;
120 }
121 }
122
123 @Override
124 public FileSystem newFileSystem(Path path, Map<String, ?> env)
125 throws IOException
126 {
127 if (path.getFileSystem() != FileSystems.getDefault()) {
128 throw new UnsupportedOperationException();
129 }
130 ensureFile(path);
131 try {
132 ZipFileSystem zipfs;
133 if (env.containsKey("multi-release")) {
134 zipfs = new JarFileSystem(this, path, env);
135 } else {
136 zipfs = new ZipFileSystem(this, path, env);
137 }
138 return zipfs;
139 } catch (ZipException ze) {
140 String pname = path.toString();
141 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
142 throw ze;
143 throw new UnsupportedOperationException();
144 }
145 }
146
147 @Override
148 public Path getPath(URI uri) {
149 String spec = uri.getSchemeSpecificPart();
150 int sep = spec.indexOf("!/");
151 if (sep == -1)
152 throw new IllegalArgumentException("URI: "
153 + uri
154 + " does not contain path info ex. jar:file:/c:/foo.zip!/BAR");
155 return getFileSystem(uri).getPath(spec.substring(sep + 1));
156 }
157
158
159 @Override
160 public FileSystem getFileSystem(URI uri) {
161 synchronized (filesystems) {
162 ZipFileSystem zipfs = null;
163 try {
164 zipfs = filesystems.get(uriToPath(uri).toRealPath());
165 } catch (IOException x) {
166 // ignore the ioe from toRealPath(), return FSNFE
167 }
168 if (zipfs == null)
169 throw new FileSystemNotFoundException();
170 return zipfs;
171 }
172 }
173
174 // Checks that the given file is a UnixPath
175 static final ZipPath toZipPath(Path path) {
176 if (path == null)
177 throw new NullPointerException();
178 if (!(path instanceof ZipPath))
179 throw new ProviderMismatchException();
180 return (ZipPath)path;
181 }
182
183 @Override
184 public void checkAccess(Path path, AccessMode... modes) throws IOException {
185 toZipPath(path).checkAccess(modes);
186 }
187
188 @Override
189 public void copy(Path src, Path target, CopyOption... options)
190 throws IOException
191 {
192 toZipPath(src).copy(toZipPath(target), options);
193 }
194
195 @Override
196 public void createDirectory(Path path, FileAttribute<?>... attrs)
197 throws IOException
198 {
199 toZipPath(path).createDirectory(attrs);
200 }
201
202 @Override
203 public final void delete(Path path) throws IOException {
204 toZipPath(path).delete();
205 }
206
207 @Override
208 @SuppressWarnings("unchecked")
209 public <V extends FileAttributeView> V
210 getFileAttributeView(Path path, Class<V> type, LinkOption... options)
211 {
212 return ZipFileAttributeView.get(toZipPath(path), type);
213 }
214
215 @Override
216 public FileStore getFileStore(Path path) throws IOException {
217 return toZipPath(path).getFileStore();
218 }
219
220 @Override
221 public boolean isHidden(Path path) {
222 return toZipPath(path).isHidden();
223 }
224
225 @Override
226 public boolean isSameFile(Path path, Path other) throws IOException {
227 return toZipPath(path).isSameFile(other);
228 }
229
230 @Override
231 public void move(Path src, Path target, CopyOption... options)
232 throws IOException
233 {
234 toZipPath(src).move(toZipPath(target), options);
235 }
236
237 @Override
238 public AsynchronousFileChannel newAsynchronousFileChannel(Path path,
239 Set<? extends OpenOption> options,
240 ExecutorService exec,
241 FileAttribute<?>... attrs)
242 throws IOException
243 {
244 throw new UnsupportedOperationException();
245 }
246
247 @Override
248 public SeekableByteChannel newByteChannel(Path path,
249 Set<? extends OpenOption> options,
250 FileAttribute<?>... attrs)
251 throws IOException
252 {
253 return toZipPath(path).newByteChannel(options, attrs);
254 }
255
256 @Override
257 public DirectoryStream<Path> newDirectoryStream(
258 Path path, Filter<? super Path> filter) throws IOException
259 {
260 return toZipPath(path).newDirectoryStream(filter);
261 }
262
263 @Override
264 public FileChannel newFileChannel(Path path,
265 Set<? extends OpenOption> options,
266 FileAttribute<?>... attrs)
267 throws IOException
268 {
269 return toZipPath(path).newFileChannel(options, attrs);
270 }
271
272 @Override
273 public InputStream newInputStream(Path path, OpenOption... options)
274 throws IOException
275 {
276 return toZipPath(path).newInputStream(options);
277 }
278
279 @Override
280 public OutputStream newOutputStream(Path path, OpenOption... options)
281 throws IOException
282 {
283 return toZipPath(path).newOutputStream(options);
284 }
285
286 @Override
287 @SuppressWarnings("unchecked") // Cast to A
288 public <A extends BasicFileAttributes> A
289 readAttributes(Path path, Class<A> type, LinkOption... options)
290 throws IOException
291 {
292 if (type == BasicFileAttributes.class || type == ZipFileAttributes.class)
293 return (A)toZipPath(path).getAttributes();
294 return null;
295 }
296
297 @Override
298 public Map<String, Object>
299 readAttributes(Path path, String attribute, LinkOption... options)
300 throws IOException
301 {
302 return toZipPath(path).readAttributes(attribute, options);
303 }
304
305 @Override
306 public Path readSymbolicLink(Path link) throws IOException {
307 throw new UnsupportedOperationException("Not supported.");
308 }
309
310 @Override
311 public void setAttribute(Path path, String attribute,
312 Object value, LinkOption... options)
313 throws IOException
314 {
315 toZipPath(path).setAttribute(attribute, value, options);
316 }
317
318 //////////////////////////////////////////////////////////////
319 void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException {
320 synchronized (filesystems) {
321 zfpath = zfpath.toRealPath();
322 if (filesystems.get(zfpath) == zfs)
323 filesystems.remove(zfpath);
324 }
325 }
326 }