play-json to Argonaut

PlayJsonVersion.scala

import java.io.NotSerializableException

import play.api.libs.json._

/**
  * Created by xiefei on 15/11/11.
  */
trait Jsonable

case class Config(name: String)

object Config {
  implicit val configFormat = Json.format[Config]
}

case class ConfigChanged(config: Config, cmd: Jsonable)

case object UseDefault

object PatternMatchingNeeded {
  val ConfigChangedClass = classOf[ConfigChanged].getName

  def playJsonVersion(bytes: Array[Byte]) = {
    Json.parse(new String(bytes, "UTF-8")) match {
      case obj: JsObject => obj.fields match {
        case Seq(
        ("manifest", JsString(ConfigChangedClass)),
        ("config", config: JsValue),
        ("cmd", configcmd: JsValue)) =>
          ConfigChanged(configFromJson(config), jsonableFromJson(configcmd))
        case _ => jsonableFromJson(obj)
      }
      case JsString("UseDefault") => UseDefault
      case other => jsonableFromJson(other)
    }
  }

  def configFromJson(value: JsValue): Config = value.as[Config]

  def jsonableFromJson(value: JsValue): Jsonable = value match {
    case obj: JsObject => obj.fields match {
      case Seq(
      ("manifest", JsString(clazzname)),
      ("payload", payload: JsValue)) =>
        reader.apply(payload).apply(clazzname)
      case _ => throw new NotSerializableException(value.toString())
    }
    case _ => throw new NotSerializableException(value.toString())
  }

  val reader = { payload: JsValue => clazzname: String =>
    new Jsonable{}
  }
}

sbt dependency

  "com.typesafe.play" %% "play-json" % "2.4.2",