How to serialize BigDecimal into unquoted JSON num...

# serialization

[Mario Andhika]

How to serialize BigDecimal into unquoted JSON number?

[glureau]

Something like that:

// Standard BigDecimal serializer that encode/decode to/from a string
public object BigDecimalSerializer : KSerializer<BigDecimal> {
    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("Decimal", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: BigDecimal) {
        // I'm using BigNum, to be adjusted with your lib
        encoder.encodeString(value.toStringExpanded())
    }

    override fun deserialize(decoder: Decoder): BigDecimal {
        return decoder.decodeString().toBigDecimal()
    }
}

// Unquoted serializer for BigDecimal.
public object JsonBigDecimalSerializer : JsonTransformingSerializer<BigDecimal>(BigDecimalSerializer) {
    // This descriptor is set to DOUBLE but this doesn't impact serialization in JsonTransformingSerializer
    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("Decimal", PrimitiveKind.DOUBLE)
    override fun transformSerialize(element: JsonElement): JsonElement {
        return JsonUnquotedLiteral(element.jsonPrimitive.content)
    }

    override fun transformDeserialize(element: JsonElement): JsonElement {
        return JsonPrimitive(element.jsonPrimitive.content)
    }
}

[Adam S]

https://stackoverflow.com/questions/75257762/how-can-i-json-encode-bigdecimal-and-biginteger-in-kotlinx-serialization-without/75257763#75257763