object Main {
  val wrongDataType = new PartialFunction[Any, String] {
    override def isDefinedAt(x: Any): Boolean = true
    override def apply(v1: Any): String = "wrong data type"
  }

  val foo = ({
    case x: Boolean => "boolean"
    case x: Int => "int"
  }: PartialFunction[Any, String]) orElse wrongDataType

  val bar = ({
    case x: String => "string"
    case x: Double => "double"
  }: PartialFunction[Any, String]) orElse wrongDataType

  def main(args: Array[String]) = {
    println(foo(123L))
  }
}