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.spi.FileSystemProvider;
42 import java.util.HashMap;
43 import java.util.Map;
44 import java.util.Set;
45 import java.util.concurrent.ExecutorService;
46 import java.util.zip.ZipException;
47
48 /**
49 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
50 */
51 public class ZipFileSystemProvider extends FileSystemProvider {
52
53 private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
54
55 public ZipFileSystemProvider() {}
56
57 @Override
58 public String getScheme() {
59 return "jar";
60 }
61
62 protected Path uriToPath(URI uri) {
63 String scheme = uri.getScheme();
64 if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
65 throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
66 }
67 try {
68 // only support legacy JAR URL syntax jar:{uri}!/{entry} for now
69 String spec = uri.getRawSchemeSpecificPart();
70 int sep = spec.indexOf("!/");
71 if (sep != -1) {
72 spec = spec.substring(0, sep);
73 }
74 return Paths.get(new URI(spec)).toAbsolutePath();
75 } catch (URISyntaxException e) {
76 throw new IllegalArgumentException(e.getMessage(), e);
77 }
78 }
79
80 private boolean ensureFile(Path path) {
81 try {
82 BasicFileAttributes attrs =
83 Files.readAttributes(path, BasicFileAttributes.class);
84 if (!attrs.isRegularFile())
85 throw new UnsupportedOperationException();
86 return true;
87 } catch (IOException ioe) {
88 return false;
89 }
90 }
91
92 @Override
93 public FileSystem newFileSystem(URI uri, Map<String, ?> env)
94 throws IOException
95 {
96 Path path = uriToPath(uri);
97 synchronized(filesystems) {
98 Path realPath = null;
99 if (ensureFile(path)) {
100 realPath = path.toRealPath();
101 if (filesystems.containsKey(realPath))
102 throw new FileSystemAlreadyExistsException();
103 }
104 ZipFileSystem zipfs = null;
105 try {
106 if (env.containsKey("multi-release")) {
107 zipfs = new JarFileSystem(this, path, env);
108 } else {
109 zipfs = new ZipFileSystem(this, path, env);
110 }
111 } catch (ZipException ze) {
112 String pname = path.toString();
113 if (pname.endsWith(".zip") || pname.endsWith(".jar"))
114 throw ze;
115 // assume NOT a zip/jar file
116 throw new UnsupportedOperationException();
117 }
118 if (realPath == null) { // newly created
119 realPath = path.toRealPath();
120 }
121 filesystems.put(realPath, zipfs);
122 return zipfs;
123 }
124 }
125
126 @Override
127 public FileSystem newFileSystem(Path path, Map<String, ?> env)
128 throws IOException
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 public <V extends FileAttributeView> V
209 getFileAttributeView(Path path, Class<V> type, LinkOption... options)
210 {
211 return ZipFileAttributeView.get(toZipPath(path), type);
212 }
213
214 @Override
215 public FileStore getFileStore(Path path) throws IOException {
216 return toZipPath(path).getFileStore();
217 }
218
219 @Override
220 public boolean isHidden(Path path) {
221 return toZipPath(path).isHidden();
222 }
223
224 @Override
225 public boolean isSameFile(Path path, Path other) throws IOException {
226 return toZipPath(path).isSameFile(other);
227 }
228
229 @Override
230 public void move(Path src, Path target, CopyOption... options)
231 throws IOException
232 {
233 toZipPath(src).move(toZipPath(target), options);
234 }
235
236 @Override
237 public AsynchronousFileChannel newAsynchronousFileChannel(Path path,
238 Set<? extends OpenOption> options,
239 ExecutorService exec,
240 FileAttribute<?>... attrs)
241 throws IOException
242 {
243 throw new UnsupportedOperationException();
244 }
245
246 @Override
247 public SeekableByteChannel newByteChannel(Path path,
248 Set<? extends OpenOption> options,
249 FileAttribute<?>... attrs)
250 throws IOException
251 {
252 return toZipPath(path).newByteChannel(options, attrs);
253 }
254
255 @Override
256 public DirectoryStream<Path> newDirectoryStream(
257 Path path, Filter<? super Path> filter) throws IOException
258 {
259 return toZipPath(path).newDirectoryStream(filter);
260 }
261
262 @Override
263 public FileChannel newFileChannel(Path path,
264 Set<? extends OpenOption> options,
265 FileAttribute<?>... attrs)
266 throws IOException
267 {
268 return toZipPath(path).newFileChannel(options, attrs);
269 }
270
271 @Override
272 public InputStream newInputStream(Path path, OpenOption... options)
273 throws IOException
274 {
275 return toZipPath(path).newInputStream(options);
276 }
277
278 @Override
279 public OutputStream newOutputStream(Path path, OpenOption... options)
280 throws IOException
281 {
282 return toZipPath(path).newOutputStream(options);
283 }
284
285 @Override
286 @SuppressWarnings("unchecked") // Cast to A
287 public <A extends BasicFileAttributes> A
288 readAttributes(Path path, Class<A> type, LinkOption... options)
289 throws IOException
290 {
291 if (type == BasicFileAttributes.class || type == ZipFileAttributes.class)
292 return (A)toZipPath(path).getAttributes();
293 return null;
294 }
295
296 @Override
297 public Map<String, Object>
298 readAttributes(Path path, String attribute, LinkOption... options)
299 throws IOException
300 {
301 return toZipPath(path).readAttributes(attribute, options);
302 }
303
304 @Override
305 public Path readSymbolicLink(Path link) throws IOException {
306 throw new UnsupportedOperationException("Not supported.");
307 }
308
309 @Override
310 public void setAttribute(Path path, String attribute,
311 Object value, LinkOption... options)
312 throws IOException
313 {
314 toZipPath(path).setAttribute(attribute, value, options);
315 }
316
317 //////////////////////////////////////////////////////////////
318 void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException {
319 synchronized (filesystems) {
320 zfpath = zfpath.toRealPath();
321 if (filesystems.get(zfpath) == zfs)
322 filesystems.remove(zfpath);
323 }
324 }
325 }