I need a configuration language with a little code. I'm trying to use scala. Can I write in Scala or in other JVM language something like
... = car() {
title = "Experimental Car"
engine = dieselEngine() {
capacity = 1.9
}
}
instead of
val c = car()
c.title = "Experimental Car"
c.engine = c.dieselEngine()
c.engine.capacity = 1.9
It is important, that dieselEngine is method on car.
Scala case classes provide exactly what you need:
case class Car(title: String, engine: Engine)
// A marker trait and several implementations
sealed trait Engine
case class DieselEngine(capacity: Double) extends Engine
case class ElectricEngine(capacity: Int) extends Engine
val c = Car(
title = "Experimental car",
engine = DieselEngine(capacity = 1.9)
)
See here for more.
Try Groovy method with:
... = new Car().with {
title = "Experimental Car"
engine = dieselEngine().with {
capacity = 1.9
return this
}
return this
}
This is also supported nicely by Builders in the Groovy language. You'd have syntax
car {
title: "Experimental Car"
engine: dieselEngine {
capacity: 1.9
}
}
