Mastering Kotlin

Implementing the Factory pattern in Kotlin

Let's walk through an example of implementing the Factory pattern to retrieve difficulty settings for a particular game. What we want to achieve is something like this:

val settings = DifficultySettings.getSettings(GameDifficulty.HARD)println("Difficulty Settings = ${settings.label}")

Our goal is to use our Factory method, in this case getSettings(), to retrieve an instance of some settings type and be able to work with that type without needing to understand how that type is actually instantiated. To implement this, perform the following steps:

1. First, we will create an enum class to represent the available difficulties we want our client code to be aware of:

enum class GameDifficulty {    EASY,  ...