json4s JDouble(NaN) writes to a string "NaN"

Asked Dec 10 '15 at 18:39

Active Dec 10 '15 at 20:36

Viewed 186 times

I am having an issue with json4s where it is picking up the JDouble(NaN) and when I do a write to json,

 Serialization.write(json)

I am getting the output as a string in JSON "NaN" and it is causing conflicts when I am adding to records in my elastic search instance because its trying to figure out Double and String.

Is there a way to just replace it with a compatible type during the write?

I am not sure how to handle it in a custom serializer like so:

class NoneJNullSerializer extends CustomSerializer[Option[_]](format => ( {
  case JDouble(NaN) => JNull
}))

The NaN is not allowed in JDouble.

I've also tried in the JSON String to do something like

.replaceAll("NaN", null)

but than I get Exception in thread "main" java.lang.NullPointerException

edited Dec 10 '15 at 20:36

asked Dec 10 '15 at 18:39

theMadKing

2,064
7
32
59

`case JDouble(x) if JDouble.isNaN(x) => ...` perhaps? – Dima Dec 10 '15 at 18:57
There is no function isNaN on JDouble. – theMadKing Dec 10 '15 at 19:51
I guess, I don't know what's `JDouble` then ... I was assuming it was an alias for java.lang.Double. – Dima Dec 10 '15 at 19:54
Part of json4s's variables, this might work: case JDouble(x) if JDouble(x.isNaN) => JNull – theMadKing Dec 10 '15 at 19:55
`case JDouble(x) if (java.lang.Double.isNaN(x)) => ...` then? – Dima Dec 10 '15 at 19:56

json4s JDouble(NaN) writes to a string "NaN"

0 Answers0