Java – after successful matching, continue to match the scala switch of the next case

How to execute another case block after executing one case block in a Scala switch statement (in Java: no interruption)

switch(step) {
    case 0: do something;
    case 1: do something more;
    case 2: etc...;
            break;
    default: do something else;
}

Thanks for your help!

Solution

If you cannot use 0 | 1 | 2, you can use the action list as a solution, as shown below:

def switch[T](i: T)(actions: (T,() => Unit)*)(default: => Unit) = {
  val acts = actions.dropWhile(_._1 != i).map{_._2}
  if (acts.isEmpty) default
  else acts.foreach{_()}
}

def myMethod(i: Int): Unit = 
  switch(i)(
    0 -> {() => println("do 0")},1 -> {() => println("do 1")},2 -> {() =>
      println("do 2")
      return // instead of break
    },3 -> {() => println("do 3")}
  )(default = println("do default"))


myMethod(1)
// do 1
// do 2

myMethod(3)
// do 3    

myMethod(5)
// do default