BigDecimal Data type handling

[hgupta83]

How will we create BigDecimal type in proto?

[lloydsparkes]

I am not actively working on this project anymore.

BUT a quick google suggests a way to serialize and deserialized BigDecimals into Protocol buffers:

http://stackoverflow.com/questions/1051732/what-is-the-best-approach-for-serializing-bigdecimal-biginteger-to-protocolbuffe

Maybe this will help you.

If you want fork the code, make the change, then submit a pull request

[erdebee]

For anyone still interested.

byte[] bigDecimalToByte(BigDecimal num) {
  BigInteger sig = new BigInteger(num.unscaledValue().toString());
  int scale = num.scale();
  byte[] bscale = new byte[] {
    (byte)(scale >>> 24), 
    (byte)(scale >>> 16), 
    (byte)(scale >>> 8), 
    (byte)(scale)
  };
  return (byte[])concat(bscale, sig.toByteArray());
}
 
BigDecimal byteToBigDecimal(byte[] raw) {
  int scale = (raw[0] & 0xFF) << 24 |
    (raw[1] & 0xFF) << 16 |
    (raw[2] & 0xFF) << 8 |
    (raw[3] & 0xFF);
  BigInteger sig = new BigInteger(subset(raw, 4));
  return new BigDecimal(sig, scale);
}

[benwatson528]

@rbrondgeest I'm being a bit optimistic asking this a year late, but where do the subset and concat methods come from?

[erdebee]

@benwatson528
For convenience i used arbitrary names... you could use org.apache.commons ArrayUtils utility object.

You'd need ArrayUtils.subarray and addall methods.

[benwatson528]

@rbrondgeest thanks for the quick reply!