private static class TestByteProcessor implements ByteProcessor<byte[]> {
    private final ByteArrayOutputStream out = new ByteArrayOutputStream();

    @Override
    public boolean processBytes(byte[] buf, int off, int len) {
      out.write(buf, off, len);
      return true;
    }

    @Override
    public byte[] getResult() {
      return out.toByteArray();
    }
  }

  private static class TestByteProcessor implements ByteProcessor<byte[]> {
    private final ByteArrayOutputStream out = new ByteArrayOutputStream();

    @Override
    public boolean processBytes(byte[] buf, int off, int len) {
      out.write(buf, off, len);
      return true;
    }

    @Override
    public byte[] getResult() {
      return out.toByteArray();
    }
  }