return new ByteArraySourceFactory();
  }

  public static ByteSourceFactory emptyByteSourceFactory() {
    return new EmptyByteSourceFactory();
  }

  public static CharSourceFactory emptyCharSourceFactory() {
    return new EmptyCharSourceFactory();
  }

  public static ByteSourceFactory fileByteSourceFactory() {
    return new FileByteSourceFactory();
  }

  public static ByteSinkFactory fileByteSinkFactory() {