static RandomAccessFile newRandomAccessFile(File path, S mode) ctex {
  bool forWrite = mode.indexOf('w') >= 0;
  if (forWrite) mkdirsForFile(path);
  RandomAccessFile f = new RandomAccessFile(path, mode);
  ifndef LeanMode
  callJavaX("registerIO", f, path, forWrite);
  endifndef
  ret f;
}