/** Remotely opens a file */
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
if (Constants.LOGVV) {
logVerboseOpenFileInfo(uri, mode);
}
Cursor cursor = query(uri, new String[] {"_data"}, null, null, null);
String path;
try {
int count = (cursor != null) ? cursor.getCount() : 0;
if (count != 1) {
// If there is not exactly one result, throw an appropriate
// exception.
if (count == 0) {
throw new FileNotFoundException("No entry for " + uri);
}
throw new FileNotFoundException("Multiple items at " + uri);
}
cursor.moveToFirst();
path = cursor.getString(0);
} finally {
if (cursor != null) {
cursor.close();
}
}
if (path == null) {
throw new FileNotFoundException("No filename found.");
}
if (!Helpers.isFilenameValid(path)) {
throw new FileNotFoundException("Invalid filename.");
}
if (!"r".equals(mode)) {
throw new FileNotFoundException("Bad mode for " + uri + ": " + mode);
}
ParcelFileDescriptor ret =
ParcelFileDescriptor.open(new File(path), ParcelFileDescriptor.MODE_READ_ONLY);
if (ret == null) {
if (Constants.LOGV) {
Log.v(Constants.TAG, "couldn't open file");
}
throw new FileNotFoundException("couldn't open file");
}
return ret;
}
