code: protected long getAbsolutePosition(final long[] iFilePosition) {
      long position = 0;
      for (int i = 0; i < iFilePosition[0]; ++i) {
        position += fileMaxSize;
      }
      return position + iFilePosition[1];
    }
docs: Return the absolute position receiving the pair file-id/file-pos.
  
  @param iFilePosition
  as pair file-id/file-pos
  @return