Select certain super class for method call in Scala

Question

If I have a class constellation in Scala like this:

class A {
def foo() = "bar"
}

class B extends A {
override def foo() = "BAR"
}

class C extends B {
}

is it possible in class C to explicitly call the method foo that was defined in A?

Answer 1

No, but you can do something similar with multiple trait inheritance:

trait A { def foo = "from A" }

class B extends A { override def foo = "from B" }

class C extends B with A {
  val b = foo          // "from B"
  val a = super[A].foo // "from A"
}

Answer 2

No, you can't, because it violates encapsulation. You are bypassing your parents behaviour, so C is supposed to extend B, but you are bypassing this.

Please see Jon Skeets excellent answer to the same question Why is super.super.method(); not allowed in Java?.

Please note that you can access the field by reflection, but you don't want to do that.

Answer 3

No. And I would leave it at that, but apparently SO wants me to go on for 30 characters.