upickle メモ

UseUpickle.scala

import upickle.{Js, Api}

trait UseUpickle {
  val mJsonApi: upickle.Api

  def write[T: mJsonApi.Writer](a: T): String = mJsonApi.write(a)
  def writeHoge(aHoge: Hoge): String = {
    import mJsonApi._
    mJsonApi.write(aHoge)
  }
}

case class Hoge(v: Long, s: String)

/**
  */
class UseDefaultUpickle extends UseUpickle {
  override val mJsonApi: Api = upickle.default
}

class UseMyUpickle extends UseUpickle {
  object MyApi extends upickle.AttributeTagged {
    override implicit val LongRW: ReadWriter[Long] = ReadWriter(
      l => Js.Num(l),
      {
        case Js.Num(d) => d.toLong
      }
    )
  }
  override val mJsonApi: Api = MyApi
}

object UpickleApp extends  App {
  def check(aUseUpickle: UseUpickle): Unit = {
    import aUseUpickle.mJsonApi._

    println(aUseUpickle.write(Hoge(10, "string")))
    println(aUseUpickle.writeHoge(Hoge(10, "string")))
  }

  val tUseDefault = new UseDefaultUpickle
  val tUserMyUpickle = new UseMyUpickle

  println("default")
  check(tUseDefault)
  println("my")
  check(tUserMyUpickle)