Casting Generic Function when applying it

[tiagofiliperdy]

At the moment a cast is being done in the Extraction Function to be able to provide it to an object called Transform which has a set of Type Classes for primitive types and collections of them. This is an example of the problem:

private def applyFunction(result: Iterable[Any],keyList: List[(String, String)],limitList: List[(Option[Int], Option[Int], String)], typeClass: Option[String], dotsList: List[String]): Any = {
...
case INTEGER if fExt.isDefined =>
val res: Seq[Int] = result.asInstanceOf[Iterable[Int]].toSeq
Try(Transform.toPrimitive(fExt.get.asInstanceOf[Seq[Int] => Unit], res)) match {
case Success() =>
case Failure() => throw CustomException(s"Type designated doens't correspond with extracted type: Seq[${typeClass.get}]")
}
...
}

The idea is to use Shapeless derivation of generic types to be able to provide the function to the Transform object without casting the function and the value to be applied in the function.