1 /*
2 * Copyright (c) 2009, 2018, 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.IOException;
29 import java.io.InputStream;
30 import java.io.OutputStream;
31 import java.net.URI;
32 import java.net.URISyntaxException;
33 import java.nio.channels.AsynchronousFileChannel;
34 import java.nio.channels.FileChannel;
35 import java.nio.channels.SeekableByteChannel;
36 import java.nio.file.AccessMode;
37 import java.nio.file.CopyOption;
38 import java.nio.file.DirectoryStream;
39 import java.nio.file.DirectoryStream.Filter;
40 import java.nio.file.FileStore;
41 import java.nio.file.FileSystem;
42 import java.nio.file.FileSystemAlreadyExistsException;
43 import java.nio.file.FileSystemNotFoundException;
44 import java.nio.file.Files;
45 import java.nio.file.LinkOption;
46 import java.nio.file.OpenOption;
47 import java.nio.file.Path;
48 import java.nio.file.Paths;
49 import java.nio.file.ProviderMismatchException;
50 import java.nio.file.attribute.BasicFileAttributes;
51 import java.nio.file.attribute.FileAttribute;
52 import java.nio.file.attribute.FileAttributeView;
53 import java.nio.file.attribute.PosixFileAttributes;
54 import java.nio.file.spi.FileSystemProvider;
55 import java.util.HashMap;
56 import java.util.Map;
57 import java.util.Set;
58 import java.util.concurrent.ExecutorService;
59 import java.util.zip.ZipException;
60
61 /**
62 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
63 */
64 public class ZipFileSystemProvider extends FileSystemProvider {
65
66 private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
67
68 public ZipFileSystemProvider() {}
69
70 @Override
71 public String getScheme() {
72 return "jar";
73 }
74
75 protected Path uriToPath(URI uri) {
76 String scheme = uri.getScheme();
77 if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
78 throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
79 }
80 try {
81 // only support legacy JAR URL syntax jar:{uri}!/{entry} for now
82 String spec = uri.getRawSchemeSpecificPart();
83 int sep = spec.indexOf("!/");
84 if (sep != -1) {
85 spec = spec.substring(0, sep);
86 }
87 return Paths.get(new URI(spec)).toAbsolutePath();
88 } catch (URISyntaxException e) {
89 throw new IllegalArgumentException(e.getMessage(), e);
90 }
91 }
92
93 private boolean ensureFile(Path path) {
94 try {
95 BasicFileAttributes attrs =
96 Files.readAttributes(path, BasicFileAttributes.class);
97 if (!attrs.isRegularFile())
98 throw new UnsupportedOperationException();
99 return true;
100 } catch (IOException ioe) {
101 return false;
102 }
103 }
104
105 @Override
106 public FileSystem newFileSystem(URI uri, Map<String, ?> env)
107 throws IOException
108 {
109 Path path = uriToPath(uri);
110 synchronized(filesystems) {
111 Path realPath = null;
112 if (ensureFile(path)) {
113 realPath = path.toRealPath();
114 if (filesystems.containsKey(realPath))
115 throw new FileSystemAlreadyExistsException();
116 }
117 ZipFileSystem zipfs = null;
118 try {
119 if (env.containsKey("multi-release")) {
120 zipfs = new JarFileSystem(this, path, env);
121 } else {
122 zipfs = new ZipFileSystem(this, path, env);
123 }
124 } catch (ZipException ze) {
125 String pname = path.toString();
126 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
127 throw ze;
128 // assume NOT a zip/jar file
129 throw new UnsupportedOperationException();
130 }
131 if (realPath == null) { // newly created
132 realPath = path.toRealPath();
133 }
134 filesystems.put(realPath, zipfs);
135 return zipfs;
136 }
137 }
138
139 @Override
140 public FileSystem newFileSystem(Path path, Map<String, ?> env)
141 throws IOException
142 {
143 ensureFile(path);
144 try {
145 ZipFileSystem zipfs;
146 if (env.containsKey("multi-release")) {
147 zipfs = new JarFileSystem(this, path, env);
148 } else {
149 zipfs = new ZipFileSystem(this, path, env);
150 }
151 return zipfs;
152 } catch (ZipException ze) {
153 String pname = path.toString();
154 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
155 throw ze;
156 throw new UnsupportedOperationException();
157 }
158 }
159
160 @Override
161 public Path getPath(URI uri) {
162 String spec = uri.getSchemeSpecificPart();
163 int sep = spec.indexOf("!/");
164 if (sep == -1)
165 throw new IllegalArgumentException("URI: "
166 + uri
167 + " does not contain path info ex. jar:file:/c:/foo.zip!/BAR");
168 return getFileSystem(uri).getPath(spec.substring(sep + 1));
169 }
170
171
172 @Override
173 public FileSystem getFileSystem(URI uri) {
174 synchronized (filesystems) {
175 ZipFileSystem zipfs = null;
176 try {
177 zipfs = filesystems.get(uriToPath(uri).toRealPath());
178 } catch (IOException x) {
179 // ignore the ioe from toRealPath(), return FSNFE
180 }
181 if (zipfs == null)
182 throw new FileSystemNotFoundException();
183 return zipfs;
184 }
185 }
186
187 // Checks that the given file is a UnixPath
188 static final ZipPath toZipPath(Path path) {
189 if (path == null)
190 throw new NullPointerException();
191 if (!(path instanceof ZipPath))
192 throw new ProviderMismatchException();
193 return (ZipPath)path;
194 }
195
196 @Override
197 public void checkAccess(Path path, AccessMode... modes) throws IOException {
198 toZipPath(path).checkAccess(modes);
199 }
200
201 @Override
202 public void copy(Path src, Path target, CopyOption... options)
203 throws IOException
204 {
205 toZipPath(src).copy(toZipPath(target), options);
206 }
207
208 @Override
209 public void createDirectory(Path path, FileAttribute<?>... attrs)
210 throws IOException
211 {
212 toZipPath(path).createDirectory(attrs);
213 }
214
215 @Override
216 public final void delete(Path path) throws IOException {
217 toZipPath(path).delete();
218 }
219
220 @Override
221 public <V extends FileAttributeView> V
222 getFileAttributeView(Path path, Class<V> type, LinkOption... options)
223 {
224 return ZipFileAttributeView.get(toZipPath(path), type);
225 }
226
227 @Override
228 public FileStore getFileStore(Path path) throws IOException {
229 return toZipPath(path).getFileStore();
230 }
231
232 @Override
233 public boolean isHidden(Path path) {
234 return toZipPath(path).isHidden();
235 }
236
237 @Override
238 public boolean isSameFile(Path path, Path other) throws IOException {
239 return toZipPath(path).isSameFile(other);
240 }
241
242 @Override
243 public void move(Path src, Path target, CopyOption... options)
244 throws IOException
245 {
246 toZipPath(src).move(toZipPath(target), options);
247 }
248
249 @Override
250 public AsynchronousFileChannel newAsynchronousFileChannel(Path path,
251 Set<? extends OpenOption> options,
252 ExecutorService exec,
253 FileAttribute<?>... attrs)
254 throws IOException
255 {
256 throw new UnsupportedOperationException();
257 }
258
259 @Override
260 public SeekableByteChannel newByteChannel(Path path,
261 Set<? extends OpenOption> options,
262 FileAttribute<?>... attrs)
263 throws IOException
264 {
265 return toZipPath(path).newByteChannel(options, attrs);
266 }
267
268 @Override
269 public DirectoryStream<Path> newDirectoryStream(
270 Path path, Filter<? super Path> filter) throws IOException
271 {
272 return toZipPath(path).newDirectoryStream(filter);
273 }
274
275 @Override
276 public FileChannel newFileChannel(Path path,
277 Set<? extends OpenOption> options,
278 FileAttribute<?>... attrs)
279 throws IOException
280 {
281 return toZipPath(path).newFileChannel(options, attrs);
282 }
283
284 @Override
285 public InputStream newInputStream(Path path, OpenOption... options)
286 throws IOException
287 {
288 return toZipPath(path).newInputStream(options);
289 }
290
291 @Override
292 public OutputStream newOutputStream(Path path, OpenOption... options)
293 throws IOException
294 {
295 return toZipPath(path).newOutputStream(options);
296 }
297
298 @Override
299 @SuppressWarnings("unchecked") // Cast to A
300 public <A extends BasicFileAttributes> A
301 readAttributes(Path path, Class<A> type, LinkOption... options)
302 throws IOException
303 {
304 if (type == BasicFileAttributes.class ||
305 type == PosixFileAttributes.class ||
306 type == ZipFileAttributes.class)
307 return (A)toZipPath(path).getAttributes();
308 return null;
309 }
310
311 @Override
312 public Map<String, Object>
313 readAttributes(Path path, String attribute, LinkOption... options)
314 throws IOException
315 {
316 return toZipPath(path).readAttributes(attribute, options);
317 }
318
319 @Override
320 public Path readSymbolicLink(Path link) throws IOException {
321 throw new UnsupportedOperationException("Not supported.");
322 }
323
324 @Override
325 public void setAttribute(Path path, String attribute,
326 Object value, LinkOption... options)
327 throws IOException
328 {
329 toZipPath(path).setAttribute(attribute, value, options);
330 }
331
332 //////////////////////////////////////////////////////////////
333 void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException {
334 synchronized (filesystems) {
335 zfpath = zfpath.toRealPath();
336 if (filesystems.get(zfpath) == zfs)
337 filesystems.remove(zfpath);
338 }
339 }
340 }