Getting type from class

Question

I've been working on a project that stores case classes in a database and can take them back out again, storing them works fine but I am having trouble with getting them back out.

For items like Strings, Ints, Floats, etc, are being stored as they are but other types are converted to a JSON string using require "eventsims" Eventsims::someclass.new like so

json4s

This is working fine and store items just like I would expect it to, but the problem is converting the items back from JSON.

Lets say I have the case class private def convertToString(obj: AnyRef, objType: Class[_]): String = { implicit val formats = Serialization.formats(NoTypeHints) objType match { case t if t == classOf[String] => obj.asInstanceOf[String] case t if t == classOf[Int] => obj.toString case t if t == classOf[Integer] => obj.toString case t if t == classOf[Boolean] => if (obj.asInstanceOf[Boolean]) "true" else "false" case t if t == classOf[Short] => obj.toString case t if t == classOf[Double] => obj.toString case t if t == classOf[Long] => obj.toString case t if t == classOf[Float] => obj.toString case t if t == classOf[Byte] => obj.toString case _ => write(obj)(formats) } } and I get the data back as Test(testInt: Int, testString: String, testMap: Map[String, _])

I can put all values into a new instance of the class expect for the map, here is the code I am using

3,'blablabla','{"Test": "Map"}'

And this method is called list so

private def restoreTypes(objClass: Class[_], argList: Array[Object]): Array[_ <: Object] = {
    var correctTypes = Array.empty[Object]
    val fields = objClass.getDeclaredFields

    for(i <- 0 until fields.length) {
      val giveType = argList(i).getClass
      val wantedType = fields(i).getType

      if(giveType != wantedType && giveType == classOf[String])
        read[/*HERE*/](argList(i).asInstanceOf[String])
      else
        correctTypes = correctTypes :+ argList(i)
    }

    correctTypes
}

I am getting stuck on how to pass the wanted type to the objClass.getConstructors()(0).newInstance(restoreTypes(objClass, args): _*) method