Fruit.kt

// Object

interface Fruit{
    fun getName() : String
}

open class Orange : Fruit{
    override fun getName(): String = "Orange"
}

// Decorator

abstract class OrangeDecorator(var orange: Orange) : Orange(){
}

class BloodyOrange(orange: Orange) : OrangeDecorator(orange){
    override fun getName(): String = orange.getName() + " Bloody"
}

class ThompsonOrange(orange: Orange) : OrangeDecorator(orange){
    override fun getName(): String = orange.getName() + " Thompson"
}

class BigOrange(orange: Orange) : OrangeDecorator(orange){
    override fun getName(): String = orange.getName() + " Big"
}