public static BigDecimal binaryToDecimal(Binary value, int precision, int scale) {
    /*
     * Precision <= 18 checks for the max number of digits for an unscaled long,
     * else treat with big integer conversion
     */
    if (precision <= 18) {
      ByteBuffer buffer = value.toByteBuffer();
      byte[] bytes = buffer.array();
      int start = buffer.arrayOffset() + buffer.position();
      int end = buffer.arrayOffset() + buffer.limit();
      long unscaled = 0L;
      int i = start;
      while (i < end) {
        unscaled = (unscaled << 8 | bytes[i] & 0xff);
        i++;
      }
      int bits = 8 * (end - start);
      long unscaledNew = (unscaled << (64 - bits)) >> (64 - bits);
      if (unscaledNew <= -pow(10, 18) || unscaledNew >= pow(10, 18)) {
        return new BigDecimal(unscaledNew);
      } else {
        return BigDecimal.valueOf(unscaledNew / pow(10, scale));
      }
    } else {
      return new BigDecimal(new BigInteger(value.getBytes()), scale);
    }
  }