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.*;
37 import java.nio.file.DirectoryStream.Filter;
38 import java.nio.file.attribute.BasicFileAttributes;
39 import java.nio.file.attribute.FileAttribute;
40 import java.nio.file.attribute.FileAttributeView;
41 import java.nio.file.attribute.PosixFileAttributes;
42 import java.nio.file.spi.FileSystemProvider;
43 import java.util.HashMap;
44 import java.util.Map;
45 import java.util.Set;
46 import java.util.concurrent.ExecutorService;
47 import java.util.zip.ZipException;
48
49 /**
50 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
51 */
52 public class ZipFileSystemProvider extends FileSystemProvider {
53
54 private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
55
56 public ZipFileSystemProvider() {}
57
58 @Override
59 public String getScheme() {
60 return "jar";
61 }
62
63 protected Path uriToPath(URI uri) {
64 String scheme = uri.getScheme();
65 if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
66 throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
67 }
68 try {
69 // only support legacy JAR URL syntax jar:{uri}!/{entry} for now
70 String spec = uri.getRawSchemeSpecificPart();
71 int sep = spec.indexOf("!/");
72 if (sep != -1) {
73 spec = spec.substring(0, sep);
74 }
75 return Paths.get(new URI(spec)).toAbsolutePath();
76 } catch (URISyntaxException e) {
77 throw new IllegalArgumentException(e.getMessage(), e);
78 }
79 }
80
81 private boolean ensureFile(Path path) {
82 try {
83 BasicFileAttributes attrs =
84 Files.readAttributes(path, BasicFileAttributes.class);
85 if (!attrs.isRegularFile())
86 throw new UnsupportedOperationException();
87 return true;
88 } catch (IOException ioe) {
89 return false;
90 }
91 }
92
93 @Override
94 public FileSystem newFileSystem(URI uri, Map<String, ?> env)
95 throws IOException
96 {
97 Path path = uriToPath(uri);
98 synchronized(filesystems) {
99 Path realPath = null;
100 if (ensureFile(path)) {
101 realPath = path.toRealPath();
102 if (filesystems.containsKey(realPath))
103 throw new FileSystemAlreadyExistsException();
104 }
105 ZipFileSystem zipfs = null;
106 try {
107 if (env.containsKey("multi-release")) {
108 zipfs = new JarFileSystem(this, path, env);
109 } else {
110 zipfs = new ZipFileSystem(this, path, env);
111 }
112 } catch (ZipException ze) {
113 String pname = path.toString();
114 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
115 throw ze;
116 // assume NOT a zip/jar file
117 throw new UnsupportedOperationException();
118 }
119 if (realPath == null) { // newly created
120 realPath = path.toRealPath();
121 }
122 filesystems.put(realPath, zipfs);
123 return zipfs;
124 }
125 }
126
127 @Override
128 public FileSystem newFileSystem(Path path, Map<String, ?> env)
129 throws IOException
130 {
131 ensureFile(path);
132 try {
133 ZipFileSystem zipfs;
134 if (env.containsKey("multi-release")) {
135 zipfs = new JarFileSystem(this, path, env);
136 } else {
137 zipfs = new ZipFileSystem(this, path, env);
138 }
139 return zipfs;
140 } catch (ZipException ze) {
141 String pname = path.toString();
142 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
143 throw ze;
144 throw new UnsupportedOperationException();
145 }
146 }
147
148 @Override
149 public Path getPath(URI uri) {
150 String spec = uri.getSchemeSpecificPart();
151 int sep = spec.indexOf("!/");
152 if (sep == -1)
153 throw new IllegalArgumentException("URI: "
154 + uri
155 + " does not contain path info ex. jar:file:/c:/foo.zip!/BAR");
156 return getFileSystem(uri).getPath(spec.substring(sep + 1));
157 }
158
159
160 @Override
161 public FileSystem getFileSystem(URI uri) {
162 synchronized (filesystems) {
163 ZipFileSystem zipfs = null;
164 try {
165 zipfs = filesystems.get(uriToPath(uri).toRealPath());
166 } catch (IOException x) {
167 // ignore the ioe from toRealPath(), return FSNFE
168 }
169 if (zipfs == null)
170 throw new FileSystemNotFoundException();
171 return zipfs;
172 }
173 }
174
175 // Checks that the given file is a UnixPath
176 static final ZipPath toZipPath(Path path) {
177 if (path == null)
178 throw new NullPointerException();
179 if (!(path instanceof ZipPath))
180 throw new ProviderMismatchException();
181 return (ZipPath)path;
182 }
183
184 @Override
185 public void checkAccess(Path path, AccessMode... modes) throws IOException {
186 toZipPath(path).checkAccess(modes);
187 }
188
189 @Override
190 public void copy(Path src, Path target, CopyOption... options)
191 throws IOException
192 {
193 toZipPath(src).copy(toZipPath(target), options);
194 }
195
196 @Override
197 public void createDirectory(Path path, FileAttribute<?>... attrs)
198 throws IOException
199 {
200 toZipPath(path).createDirectory(attrs);
201 }
202
203 @Override
204 public final void delete(Path path) throws IOException {
205 toZipPath(path).delete();
206 }
207
208 @Override
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 ||
293 type == PosixFileAttributes.class ||
294 type == ZipFileAttributes.class)
295 return (A)toZipPath(path).getAttributes();
296 return null;
297 }
298
299 @Override
300 public Map<String, Object>
301 readAttributes(Path path, String attributes, LinkOption... options)
302 throws IOException
303 {
304 return toZipPath(path).readAttributes(attributes, options);
305 }
306
307 @Override
308 public Path readSymbolicLink(Path link) throws IOException {
309 throw new UnsupportedOperationException("Not supported.");
310 }
311
312 @Override
313 public void setAttribute(Path path, String attribute,
314 Object value, LinkOption... options)
315 throws IOException
316 {
317 toZipPath(path).setAttribute(attribute, value, options);
318 }
319
320 //////////////////////////////////////////////////////////////
321 void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException {
322 synchronized (filesystems) {
323 zfpath = zfpath.toRealPath();
324 if (filesystems.get(zfpath) == zfs)
325 filesystems.remove(zfpath);
326 }
327 }
328 }