114 UIManager.addPropertyChangeListener(new PropertyChangeListener() {
115 public void propertyChange(PropertyChangeEvent evt) {
116 FileSystemView fileSystemView = weakReference.get();
117
118 if (fileSystemView == null) {
119 // FileSystemView was destroyed
120 UIManager.removePropertyChangeListener(this);
121 } else {
122 if (evt.getPropertyName().equals("lookAndFeel")) {
123 fileSystemView.useSystemExtensionHiding =
124 UIManager.getDefaults().getBoolean("FileChooser.useSystemExtensionHiding");
125 }
126 }
127 }
128 });
129 }
130
131 /**
132 * Determines if the given file is a root in the navigable tree(s).
133 * Examples: Windows 98 has one root, the Desktop folder. DOS has one root
134 * per drive letter, <code>C:\</code>, <code>D:\</code>, etc. Unix has one root,
135 * the <code>"/"</code> directory.
136 *
137 * The default implementation gets information from the <code>ShellFolder</code> class.
138 *
139 * @param f a <code>File</code> object representing a directory
140 * @return <code>true</code> if <code>f</code> is a root in the navigable tree.
141 * @see #isFileSystemRoot
142 */
143 public boolean isRoot(File f) {
144 if (f == null || !f.isAbsolute()) {
145 return false;
146 }
147
148 File[] roots = getRoots();
149 for (File root : roots) {
150 if (root.equals(f)) {
151 return true;
152 }
153 }
154 return false;
155 }
156
157 /**
158 * Returns true if the file (directory) can be visited.
159 * Returns false if the directory cannot be traversed.
160 *
161 * @param f the <code>File</code>
162 * @return <code>true</code> if the file/directory can be traversed, otherwise <code>false</code>
163 * @see JFileChooser#isTraversable
164 * @see FileView#isTraversable
165 * @since 1.4
166 */
167 public Boolean isTraversable(File f) {
168 return Boolean.valueOf(f.isDirectory());
169 }
170
171 /**
172 * Name of a file, directory, or folder as it would be displayed in
173 * a system file browser. Example from Windows: the "M:\" directory
174 * displays as "CD-ROM (M:)"
175 *
176 * The default implementation gets information from the ShellFolder class.
177 *
178 * @param f a <code>File</code> object
179 * @return the file name as it would be displayed by a native file chooser
180 * @see JFileChooser#getName
181 * @since 1.4
182 */
183 public String getSystemDisplayName(File f) {
184 if (f == null) {
185 return null;
186 }
187
188 String name = f.getName();
189
190 if (!name.equals("..") && !name.equals(".") &&
191 (useSystemExtensionHiding || !isFileSystem(f) || isFileSystemRoot(f)) &&
192 (f instanceof ShellFolder || f.exists())) {
193
194 try {
195 name = getShellFolder(f).getDisplayName();
196 } catch (FileNotFoundException e) {
197 return null;
198 }
199
200 if (name == null || name.length() == 0) {
201 name = f.getPath(); // e.g. "/"
202 }
203 }
204
205 return name;
206 }
207
208 /**
209 * Type description for a file, directory, or folder as it would be displayed in
210 * a system file browser. Example from Windows: the "Desktop" folder
211 * is described as "Desktop".
212 *
213 * Override for platforms with native ShellFolder implementations.
214 *
215 * @param f a <code>File</code> object
216 * @return the file type description as it would be displayed by a native file chooser
217 * or null if no native information is available.
218 * @see JFileChooser#getTypeDescription
219 * @since 1.4
220 */
221 public String getSystemTypeDescription(File f) {
222 return null;
223 }
224
225 /**
226 * Icon for a file, directory, or folder as it would be displayed in
227 * a system file browser. Example from Windows: the "M:\" directory
228 * displays a CD-ROM icon.
229 *
230 * The default implementation gets information from the ShellFolder class.
231 *
232 * @param f a <code>File</code> object
233 * @return an icon as it would be displayed by a native file chooser
234 * @see JFileChooser#getIcon
235 * @since 1.4
236 */
237 public Icon getSystemIcon(File f) {
238 if (f == null) {
239 return null;
240 }
241
242 ShellFolder sf;
243
244 try {
245 sf = getShellFolder(f);
246 } catch (FileNotFoundException e) {
247 return null;
248 }
249
250 Image img = sf.getIcon(false);
251
252 if (img != null) {
253 return new ImageIcon(img, sf.getFolderType());
254 } else {
255 return UIManager.getIcon(f.isDirectory() ? "FileView.directoryIcon" : "FileView.fileIcon");
256 }
257 }
258
259 /**
260 * On Windows, a file can appear in multiple folders, other than its
261 * parent directory in the filesystem. Folder could for example be the
262 * "Desktop" folder which is not the same as file.getParentFile().
263 *
264 * @param folder a <code>File</code> object representing a directory or special folder
265 * @param file a <code>File</code> object
266 * @return <code>true</code> if <code>folder</code> is a directory or special folder and contains <code>file</code>.
267 * @since 1.4
268 */
269 public boolean isParent(File folder, File file) {
270 if (folder == null || file == null) {
271 return false;
272 } else if (folder instanceof ShellFolder) {
273 File parent = file.getParentFile();
274 if (parent != null && parent.equals(folder)) {
275 return true;
276 }
277 File[] children = getFiles(folder, false);
278 for (File child : children) {
279 if (file.equals(child)) {
280 return true;
281 }
282 }
283 return false;
284 } else {
285 return folder.equals(file.getParentFile());
286 }
287 }
288
289 /**
290 *
291 * @param parent a <code>File</code> object representing a directory or special folder
292 * @param fileName a name of a file or folder which exists in <code>parent</code>
293 * @return a File object. This is normally constructed with <code>new
294 * File(parent, fileName)</code> except when parent and child are both
295 * special folders, in which case the <code>File</code> is a wrapper containing
296 * a <code>ShellFolder</code> object.
297 * @since 1.4
298 */
299 public File getChild(File parent, String fileName) {
300 if (parent instanceof ShellFolder) {
301 File[] children = getFiles(parent, false);
302 for (File child : children) {
303 if (child.getName().equals(fileName)) {
304 return child;
305 }
306 }
307 }
308 return createFileObject(parent, fileName);
309 }
310
311
312 /**
313 * Checks if <code>f</code> represents a real directory or file as opposed to a
314 * special folder such as <code>"Desktop"</code>. Used by UI classes to decide if
315 * a folder is selectable when doing directory choosing.
316 *
317 * @param f a <code>File</code> object
318 * @return <code>true</code> if <code>f</code> is a real file or directory.
319 * @since 1.4
320 */
321 public boolean isFileSystem(File f) {
322 if (f instanceof ShellFolder) {
323 ShellFolder sf = (ShellFolder)f;
324 // Shortcuts to directories are treated as not being file system objects,
325 // so that they are never returned by JFileChooser.
326 return sf.isFileSystem() && !(sf.isLink() && sf.isDirectory());
327 } else {
328 return true;
329 }
330 }
331
332 /**
333 * Creates a new folder with a default folder name.
334 *
335 * @param containingDir a {@code File} object denoting directory to contain the new folder
336 * @return a {@code File} object denoting the newly created folder
337 * @throws IOException if new folder could not be created
338 */
339 public abstract File createNewFolder(File containingDir) throws IOException;
340
341 /**
342 * Returns whether a file is hidden or not.
343 *
344 * @param f a {@code File} object
345 * @return true if the given {@code File} denotes a hidden file
346 */
347 public boolean isHiddenFile(File f) {
348 return f.isHidden();
349 }
350
351
352 /**
353 * Is dir the root of a tree in the file system, such as a drive
354 * or partition. Example: Returns true for "C:\" on Windows 98.
355 *
356 * @param dir a <code>File</code> object representing a directory
357 * @return <code>true</code> if <code>f</code> is a root of a filesystem
358 * @see #isRoot
359 * @since 1.4
360 */
361 public boolean isFileSystemRoot(File dir) {
362 return ShellFolder.isFileSystemRoot(dir);
363 }
364
365 /**
366 * Used by UI classes to decide whether to display a special icon
367 * for drives or partitions, e.g. a "hard disk" icon.
368 *
369 * The default implementation has no way of knowing, so always returns false.
370 *
371 * @param dir a directory
372 * @return <code>false</code> always
373 * @since 1.4
374 */
375 public boolean isDrive(File dir) {
376 return false;
377 }
378
379 /**
380 * Used by UI classes to decide whether to display a special icon
381 * for a floppy disk. Implies isDrive(dir).
382 *
383 * The default implementation has no way of knowing, so always returns false.
384 *
385 * @param dir a directory
386 * @return <code>false</code> always
387 * @since 1.4
388 */
389 public boolean isFloppyDrive(File dir) {
390 return false;
391 }
392
393 /**
394 * Used by UI classes to decide whether to display a special icon
395 * for a computer node, e.g. "My Computer" or a network server.
396 *
397 * The default implementation has no way of knowing, so always returns false.
398 *
399 * @param dir a directory
400 * @return <code>false</code> always
401 * @since 1.4
402 */
403 public boolean isComputerNode(File dir) {
404 return ShellFolder.isComputerNode(dir);
405 }
406
407
408 /**
409 * Returns all root partitions on this system. For example, on
410 * Windows, this would be the "Desktop" folder, while on DOS this
411 * would be the A: through Z: drives.
412 *
413 * @return an array of {@code File} objects representing all root partitions
414 * on this system
415 */
416 public File[] getRoots() {
417 // Don't cache this array, because filesystem might change
418 File[] roots = (File[])ShellFolder.get("roots");
419
420 for (int i = 0; i < roots.length; i++) {
425 return roots;
426 }
427
428
429 // Providing default implementations for the remaining methods
430 // because most OS file systems will likely be able to use this
431 // code. If a given OS can't, override these methods in its
432 // implementation.
433
434 /**
435 * Returns the home directory.
436 * @return the home directory
437 */
438 public File getHomeDirectory() {
439 return createFileObject(System.getProperty("user.home"));
440 }
441
442 /**
443 * Return the user's default starting directory for the file chooser.
444 *
445 * @return a <code>File</code> object representing the default
446 * starting folder
447 * @since 1.4
448 */
449 public File getDefaultDirectory() {
450 File f = (File)ShellFolder.get("fileChooserDefaultFolder");
451 if (isFileSystemRoot(f)) {
452 f = createFileSystemRoot(f);
453 }
454 return f;
455 }
456
457 /**
458 * Returns a File object constructed in dir from the given filename.
459 *
460 * @param dir an abstract pathname denoting a directory
461 * @param filename a {@code String} representation of a pathname
462 * @return a {@code File} object created from {@code dir} and {@code filename}
463 */
464 public File createFileObject(File dir, String filename) {
465 if(dir == null) {
526 // Not a valid file (wouldn't show in native file chooser)
527 // Example: C:\pagefile.sys
528 continue;
529 } catch (InternalError e) {
530 // Not a valid file (wouldn't show in native file chooser)
531 // Example C:\Winnt\Profiles\joe\history\History.IE5
532 continue;
533 }
534 }
535 if (!useFileHiding || !isHiddenFile(f)) {
536 files.add(f);
537 }
538 }
539
540 return files.toArray(new File[files.size()]);
541 }
542
543
544
545 /**
546 * Returns the parent directory of <code>dir</code>.
547 * @param dir the <code>File</code> being queried
548 * @return the parent directory of <code>dir</code>, or
549 * <code>null</code> if <code>dir</code> is <code>null</code>
550 */
551 public File getParentDirectory(File dir) {
552 if (dir == null || !dir.exists()) {
553 return null;
554 }
555
556 ShellFolder sf;
557
558 try {
559 sf = getShellFolder(dir);
560 } catch (FileNotFoundException e) {
561 return null;
562 }
563
564 File psf = sf.getParentFile();
565
566 if (psf == null) {
567 return null;
568 }
569
584 }
585
586 /**
587 * Throws {@code FileNotFoundException} if file not found or current thread was interrupted
588 */
589 ShellFolder getShellFolder(File f) throws FileNotFoundException {
590 if (!(f instanceof ShellFolder) && !(f instanceof FileSystemRoot) && isFileSystemRoot(f)) {
591 f = createFileSystemRoot(f);
592 }
593
594 try {
595 return ShellFolder.getShellFolder(f);
596 } catch (InternalError e) {
597 System.err.println("FileSystemView.getShellFolder: f="+f);
598 e.printStackTrace();
599 return null;
600 }
601 }
602
603 /**
604 * Creates a new <code>File</code> object for <code>f</code> with correct
605 * behavior for a file system root directory.
606 *
607 * @param f a <code>File</code> object representing a file system root
608 * directory, for example "/" on Unix or "C:\" on Windows.
609 * @return a new <code>File</code> object
610 * @since 1.4
611 */
612 protected File createFileSystemRoot(File f) {
613 return new FileSystemRoot(f);
614 }
615
616 @SuppressWarnings("serial") // Same-version serialization only
617 static class FileSystemRoot extends File {
618 public FileSystemRoot(File f) {
619 super(f,"");
620 }
621
622 public FileSystemRoot(String s) {
623 super(s);
624 }
625
626 public boolean isDirectory() {
627 return true;
628 }
629
|
114 UIManager.addPropertyChangeListener(new PropertyChangeListener() {
115 public void propertyChange(PropertyChangeEvent evt) {
116 FileSystemView fileSystemView = weakReference.get();
117
118 if (fileSystemView == null) {
119 // FileSystemView was destroyed
120 UIManager.removePropertyChangeListener(this);
121 } else {
122 if (evt.getPropertyName().equals("lookAndFeel")) {
123 fileSystemView.useSystemExtensionHiding =
124 UIManager.getDefaults().getBoolean("FileChooser.useSystemExtensionHiding");
125 }
126 }
127 }
128 });
129 }
130
131 /**
132 * Determines if the given file is a root in the navigable tree(s).
133 * Examples: Windows 98 has one root, the Desktop folder. DOS has one root
134 * per drive letter, {@code C:\}, {@code D:\}, etc. Unix has one root,
135 * the {@code "/"} directory.
136 *
137 * The default implementation gets information from the {@code ShellFolder} class.
138 *
139 * @param f a {@code File} object representing a directory
140 * @return {@code true} if {@code f} is a root in the navigable tree.
141 * @see #isFileSystemRoot
142 */
143 public boolean isRoot(File f) {
144 if (f == null || !f.isAbsolute()) {
145 return false;
146 }
147
148 File[] roots = getRoots();
149 for (File root : roots) {
150 if (root.equals(f)) {
151 return true;
152 }
153 }
154 return false;
155 }
156
157 /**
158 * Returns true if the file (directory) can be visited.
159 * Returns false if the directory cannot be traversed.
160 *
161 * @param f the {@code File}
162 * @return {@code true} if the file/directory can be traversed, otherwise {@code false}
163 * @see JFileChooser#isTraversable
164 * @see FileView#isTraversable
165 * @since 1.4
166 */
167 public Boolean isTraversable(File f) {
168 return Boolean.valueOf(f.isDirectory());
169 }
170
171 /**
172 * Name of a file, directory, or folder as it would be displayed in
173 * a system file browser. Example from Windows: the "M:\" directory
174 * displays as "CD-ROM (M:)"
175 *
176 * The default implementation gets information from the ShellFolder class.
177 *
178 * @param f a {@code File} object
179 * @return the file name as it would be displayed by a native file chooser
180 * @see JFileChooser#getName
181 * @since 1.4
182 */
183 public String getSystemDisplayName(File f) {
184 if (f == null) {
185 return null;
186 }
187
188 String name = f.getName();
189
190 if (!name.equals("..") && !name.equals(".") &&
191 (useSystemExtensionHiding || !isFileSystem(f) || isFileSystemRoot(f)) &&
192 (f instanceof ShellFolder || f.exists())) {
193
194 try {
195 name = getShellFolder(f).getDisplayName();
196 } catch (FileNotFoundException e) {
197 return null;
198 }
199
200 if (name == null || name.length() == 0) {
201 name = f.getPath(); // e.g. "/"
202 }
203 }
204
205 return name;
206 }
207
208 /**
209 * Type description for a file, directory, or folder as it would be displayed in
210 * a system file browser. Example from Windows: the "Desktop" folder
211 * is described as "Desktop".
212 *
213 * Override for platforms with native ShellFolder implementations.
214 *
215 * @param f a {@code File} object
216 * @return the file type description as it would be displayed by a native file chooser
217 * or null if no native information is available.
218 * @see JFileChooser#getTypeDescription
219 * @since 1.4
220 */
221 public String getSystemTypeDescription(File f) {
222 return null;
223 }
224
225 /**
226 * Icon for a file, directory, or folder as it would be displayed in
227 * a system file browser. Example from Windows: the "M:\" directory
228 * displays a CD-ROM icon.
229 *
230 * The default implementation gets information from the ShellFolder class.
231 *
232 * @param f a {@code File} object
233 * @return an icon as it would be displayed by a native file chooser
234 * @see JFileChooser#getIcon
235 * @since 1.4
236 */
237 public Icon getSystemIcon(File f) {
238 if (f == null) {
239 return null;
240 }
241
242 ShellFolder sf;
243
244 try {
245 sf = getShellFolder(f);
246 } catch (FileNotFoundException e) {
247 return null;
248 }
249
250 Image img = sf.getIcon(false);
251
252 if (img != null) {
253 return new ImageIcon(img, sf.getFolderType());
254 } else {
255 return UIManager.getIcon(f.isDirectory() ? "FileView.directoryIcon" : "FileView.fileIcon");
256 }
257 }
258
259 /**
260 * On Windows, a file can appear in multiple folders, other than its
261 * parent directory in the filesystem. Folder could for example be the
262 * "Desktop" folder which is not the same as file.getParentFile().
263 *
264 * @param folder a {@code File} object representing a directory or special folder
265 * @param file a {@code File} object
266 * @return {@code true} if {@code folder} is a directory or special folder and contains {@code file}.
267 * @since 1.4
268 */
269 public boolean isParent(File folder, File file) {
270 if (folder == null || file == null) {
271 return false;
272 } else if (folder instanceof ShellFolder) {
273 File parent = file.getParentFile();
274 if (parent != null && parent.equals(folder)) {
275 return true;
276 }
277 File[] children = getFiles(folder, false);
278 for (File child : children) {
279 if (file.equals(child)) {
280 return true;
281 }
282 }
283 return false;
284 } else {
285 return folder.equals(file.getParentFile());
286 }
287 }
288
289 /**
290 *
291 * @param parent a {@code File} object representing a directory or special folder
292 * @param fileName a name of a file or folder which exists in {@code parent}
293 * @return a File object. This is normally constructed with
294 * {@code new File(parent, fileName)} except when parent and child are both
295 * special folders, in which case the {@code File} is a wrapper containing
296 * a {@code ShellFolder} object.
297 * @since 1.4
298 */
299 public File getChild(File parent, String fileName) {
300 if (parent instanceof ShellFolder) {
301 File[] children = getFiles(parent, false);
302 for (File child : children) {
303 if (child.getName().equals(fileName)) {
304 return child;
305 }
306 }
307 }
308 return createFileObject(parent, fileName);
309 }
310
311
312 /**
313 * Checks if {@code f} represents a real directory or file as opposed to a
314 * special folder such as {@code "Desktop"}. Used by UI classes to decide if
315 * a folder is selectable when doing directory choosing.
316 *
317 * @param f a {@code File} object
318 * @return {@code true} if {@code f} is a real file or directory.
319 * @since 1.4
320 */
321 public boolean isFileSystem(File f) {
322 if (f instanceof ShellFolder) {
323 ShellFolder sf = (ShellFolder)f;
324 // Shortcuts to directories are treated as not being file system objects,
325 // so that they are never returned by JFileChooser.
326 return sf.isFileSystem() && !(sf.isLink() && sf.isDirectory());
327 } else {
328 return true;
329 }
330 }
331
332 /**
333 * Creates a new folder with a default folder name.
334 *
335 * @param containingDir a {@code File} object denoting directory to contain the new folder
336 * @return a {@code File} object denoting the newly created folder
337 * @throws IOException if new folder could not be created
338 */
339 public abstract File createNewFolder(File containingDir) throws IOException;
340
341 /**
342 * Returns whether a file is hidden or not.
343 *
344 * @param f a {@code File} object
345 * @return true if the given {@code File} denotes a hidden file
346 */
347 public boolean isHiddenFile(File f) {
348 return f.isHidden();
349 }
350
351
352 /**
353 * Is dir the root of a tree in the file system, such as a drive
354 * or partition. Example: Returns true for "C:\" on Windows 98.
355 *
356 * @param dir a {@code File} object representing a directory
357 * @return {@code true} if {@code f} is a root of a filesystem
358 * @see #isRoot
359 * @since 1.4
360 */
361 public boolean isFileSystemRoot(File dir) {
362 return ShellFolder.isFileSystemRoot(dir);
363 }
364
365 /**
366 * Used by UI classes to decide whether to display a special icon
367 * for drives or partitions, e.g. a "hard disk" icon.
368 *
369 * The default implementation has no way of knowing, so always returns false.
370 *
371 * @param dir a directory
372 * @return {@code false} always
373 * @since 1.4
374 */
375 public boolean isDrive(File dir) {
376 return false;
377 }
378
379 /**
380 * Used by UI classes to decide whether to display a special icon
381 * for a floppy disk. Implies isDrive(dir).
382 *
383 * The default implementation has no way of knowing, so always returns false.
384 *
385 * @param dir a directory
386 * @return {@code false} always
387 * @since 1.4
388 */
389 public boolean isFloppyDrive(File dir) {
390 return false;
391 }
392
393 /**
394 * Used by UI classes to decide whether to display a special icon
395 * for a computer node, e.g. "My Computer" or a network server.
396 *
397 * The default implementation has no way of knowing, so always returns false.
398 *
399 * @param dir a directory
400 * @return {@code false} always
401 * @since 1.4
402 */
403 public boolean isComputerNode(File dir) {
404 return ShellFolder.isComputerNode(dir);
405 }
406
407
408 /**
409 * Returns all root partitions on this system. For example, on
410 * Windows, this would be the "Desktop" folder, while on DOS this
411 * would be the A: through Z: drives.
412 *
413 * @return an array of {@code File} objects representing all root partitions
414 * on this system
415 */
416 public File[] getRoots() {
417 // Don't cache this array, because filesystem might change
418 File[] roots = (File[])ShellFolder.get("roots");
419
420 for (int i = 0; i < roots.length; i++) {
425 return roots;
426 }
427
428
429 // Providing default implementations for the remaining methods
430 // because most OS file systems will likely be able to use this
431 // code. If a given OS can't, override these methods in its
432 // implementation.
433
434 /**
435 * Returns the home directory.
436 * @return the home directory
437 */
438 public File getHomeDirectory() {
439 return createFileObject(System.getProperty("user.home"));
440 }
441
442 /**
443 * Return the user's default starting directory for the file chooser.
444 *
445 * @return a {@code File} object representing the default
446 * starting folder
447 * @since 1.4
448 */
449 public File getDefaultDirectory() {
450 File f = (File)ShellFolder.get("fileChooserDefaultFolder");
451 if (isFileSystemRoot(f)) {
452 f = createFileSystemRoot(f);
453 }
454 return f;
455 }
456
457 /**
458 * Returns a File object constructed in dir from the given filename.
459 *
460 * @param dir an abstract pathname denoting a directory
461 * @param filename a {@code String} representation of a pathname
462 * @return a {@code File} object created from {@code dir} and {@code filename}
463 */
464 public File createFileObject(File dir, String filename) {
465 if(dir == null) {
526 // Not a valid file (wouldn't show in native file chooser)
527 // Example: C:\pagefile.sys
528 continue;
529 } catch (InternalError e) {
530 // Not a valid file (wouldn't show in native file chooser)
531 // Example C:\Winnt\Profiles\joe\history\History.IE5
532 continue;
533 }
534 }
535 if (!useFileHiding || !isHiddenFile(f)) {
536 files.add(f);
537 }
538 }
539
540 return files.toArray(new File[files.size()]);
541 }
542
543
544
545 /**
546 * Returns the parent directory of {@code dir}.
547 * @param dir the {@code File} being queried
548 * @return the parent directory of {@code dir}, or
549 * {@code null} if {@code dir} is {@code null}
550 */
551 public File getParentDirectory(File dir) {
552 if (dir == null || !dir.exists()) {
553 return null;
554 }
555
556 ShellFolder sf;
557
558 try {
559 sf = getShellFolder(dir);
560 } catch (FileNotFoundException e) {
561 return null;
562 }
563
564 File psf = sf.getParentFile();
565
566 if (psf == null) {
567 return null;
568 }
569
584 }
585
586 /**
587 * Throws {@code FileNotFoundException} if file not found or current thread was interrupted
588 */
589 ShellFolder getShellFolder(File f) throws FileNotFoundException {
590 if (!(f instanceof ShellFolder) && !(f instanceof FileSystemRoot) && isFileSystemRoot(f)) {
591 f = createFileSystemRoot(f);
592 }
593
594 try {
595 return ShellFolder.getShellFolder(f);
596 } catch (InternalError e) {
597 System.err.println("FileSystemView.getShellFolder: f="+f);
598 e.printStackTrace();
599 return null;
600 }
601 }
602
603 /**
604 * Creates a new {@code File} object for {@code f} with correct
605 * behavior for a file system root directory.
606 *
607 * @param f a {@code File} object representing a file system root
608 * directory, for example "/" on Unix or "C:\" on Windows.
609 * @return a new {@code File} object
610 * @since 1.4
611 */
612 protected File createFileSystemRoot(File f) {
613 return new FileSystemRoot(f);
614 }
615
616 @SuppressWarnings("serial") // Same-version serialization only
617 static class FileSystemRoot extends File {
618 public FileSystemRoot(File f) {
619 super(f,"");
620 }
621
622 public FileSystemRoot(String s) {
623 super(s);
624 }
625
626 public boolean isDirectory() {
627 return true;
628 }
629
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