Strange serialization of scala Map

Hey,

I tried to serialize this with upicke 0.2.2, scala 2.11.2, scala.js 0.5.3 :

case class RequestMessage(requestId: String, op: String, processor: String, args: Map[String, String])
write(RequestMessage(
      "1d6d02bd-8e56-421d-9438-3bd6d0079ff1",
      "eval",
      "",
      Map(
        "gremlin" -> "g.v(x).out",
        "bindings" -> "",
        "language" -> "gremlin-groovy"
      )
    )
)

{"requestId":"1d6d02bd-8e56-421d-9438-3bd6d0079ff1","op":"eval","processor":"","args":[["gremlin","g.v(x).out"],["bindings",""],["language","gremlin-groovy"]]}

Do I need to implement unapply method for maps too in case classes? The map is serialized into some sort of list of arrays. Even if I serialize it directly it resolves to :

[["gremlin","g.v(x).out"],["bindings",""],["language","gremlin-groovy"]]

[l15k4]

For future reference, with scala.js the best possible way to handle Map[K, Any] is :

import scala.scalajs.js.Dynamic.{literal => lit}
import scala.scalajs.js.JSON._
stringify(
      lit(
        "gremlin" -> "g.v(x).out",
        "language" -> "gremlin-groovy",
        "bindings" -> lit("x" -> 1)
      )
    )

[l15k4]

There is just one thing that is really hard to deal with and that’s the Map[K, Any] I hit dead end with… I wanted to use shapeless HMap, but it doesn’t give you keySet or let you iterate it. Would you please uplade the README and tell people what alternatives do they have ? That would be highly appreciated.

Messaging protocol of the server counterpart I’m communicating with is based on nested maps of various value data types : primitives, map and list of primitives