/** Returns the single instance of this service. Needs to get a FileSave Service impl too. */
public static synchronized FileOpenService getInstance() {
if (_sharedInstance == null) {
_sharedInstance =
new FileOpenServiceImpl((FileSaveServiceImpl) FileSaveServiceImpl.getInstance());
}
return _sharedInstance;
}
/** Asks the user to choose one or more files. See description in service interface */
public FileContents[] openMultiFileDialog(final String pathHint, final String[] extentions)
throws IOException {
// Check permission with user first
if (!_fileSaveServiceImpl.askUser()) return null;
FileContents[] fcs =
(FileContents[])
AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
JFileChooser jfc = null;
FileSystemView fsv = getFileSystemView();
// use pathHint if possible
if (pathHint != null) {
jfc = new JFileChooser(pathHint, fsv);
} else { // use lastOpenPath
jfc = new JFileChooser(_fileSaveServiceImpl.getLastPath(), fsv);
}
jfc.setFileSelectionMode(JFileChooser.FILES_ONLY);
jfc.setDialogType(JFileChooser.OPEN_DIALOG);
jfc.setMultiSelectionEnabled(true);
int state = jfc.showOpenDialog(null);
if (state == JFileChooser.CANCEL_OPTION) {
// User selected to cancle operation
return null;
}
File[] fs = jfc.getSelectedFiles();
if (fs != null && fs.length > 0) {
FileContents[] fcontents = new FileContents[fs.length];
for (int i = 0; i < fs.length; i++) {
try {
fcontents[i] =
new FileContentsImpl(
fs[i], FileSaveServiceImpl.computeMaxLength(fs[i].length()));
_fileSaveServiceImpl.setLastPath(fs[i].getPath());
} catch (FileNotFoundException ie) {
// Fall through
} catch (IOException ioe) {
}
}
return fcontents;
}
return null;
}
});
return fcs;
}
/** Asks the user to choose a file. See description in service interface */
public FileContents openFileDialog(final String pathHint, final String[] extentions)
throws IOException {
// Ask user permission first
if (!_fileSaveServiceImpl.askUser()) return null;
FileContents fc =
(FileContents)
AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
JFileChooser jfc = null;
FileSystemView fsv = getFileSystemView();
// use pathHint if possible
if (pathHint != null) {
jfc = new JFileChooser(pathHint, fsv);
} else { // use lastOpenPath
jfc = new JFileChooser(_fileSaveServiceImpl.getLastPath(), fsv);
}
jfc.setFileSelectionMode(JFileChooser.FILES_ONLY);
jfc.setDialogType(JFileChooser.OPEN_DIALOG);
jfc.setMultiSelectionEnabled(false);
int state = jfc.showOpenDialog(null);
if (state == JFileChooser.CANCEL_OPTION) {
// User selected to cancle operation
return null;
}
File f = jfc.getSelectedFile();
if (f != null) {
try {
_fileSaveServiceImpl.setLastPath(f.getPath());
return new FileContentsImpl(
f, FileSaveServiceImpl.computeMaxLength(f.length()));
} catch (FileNotFoundException ie) {
// Fall through
} catch (IOException ioe) {
}
}
return null;
}
});
return fc;
}
