JsonReader.readJsonValue: parse number as int/long/dbl

[simon04]

Attempt an exact conversion to integer or long prior before returning a double.

This addresses influxdata/influxdb-java#276.

[simon04]

The distinction ±0.0 is lost in the JsonValueReader since BigDecimal does not distinguish between those.

[swankjesse]

Thanks for sending this. Unfortunately, I don’t think we want to change the default behavior here.

In particular I think these two JSONs should be equal when converted to Java.
[1,2,3], [1.0,2.0,3.0]

Unfortunately, a Java Long is not equal to the corresponding Double, so we need to either pick the data type based on the encoding, or pick one data type universally.

For Moshi’s defaults we’ve chosen to use a single data type, double, to use everywhere.

That said, it is possible to get this behavior with a JsonAdapter. Lemme try to supply that...

[simon04]

Thanks for your answer. The JSON standard is pretty lose on the interpretation of numbers. So there's no clear correct or wrong.

I'm highly interested in the mentioned JsonAdapter.

[swankjesse]

@simon04 here’s a JSON adapter that does what we’re talking about. Unfortunately it didn’t work immediately as I was hoping so I submitted this PR. You’ll need a snapshot or the next release before this adapter works as you want.

https://gist.github.com/swankjesse/0331f24df1aa25454eaae04e49fe2f19