How to find class parameter datatype at runtime in scala

Question

import scala.reflect.runtime.universe
import scala.reflect.runtime.universe._

def getType[T: TypeTag](obj: T) = typeOf[T]

case class Thing(
  val id: Int,
  var name:          


        

Answer 1

@Dmytrio answer is a great explanation why the reflection didn't work as you expected.

I can understand from your question, that what you are trying to do, is actually pattern match all variables you have in a case class. Please consider doing it in the following way:

case class Thing(id: Int, name: String)
val thing = Thing(1, "Apple")

thing.productIterator.foreach {
  case t: Int => println(s"I am Int: $t")
  case t: String => println(s"String, Do some stuff: $t")
  case t => println(s"Absurd: $t")
} 

Code run at Scastie.