Simple Factory

gistfile1.txt

// Product and Concrete Product
protocol Adventurer {
    func getType() -> String
}

class Archer: Adventurer {
    func getType() -> String {
        print("I'm an archer")
        return String(describing: Archer.self)
    }
}

class Warrior: Adventurer {
    func getType() -> String {
        print("I'm a warrior")
        return String(describing: Warrior.self)
    }
}

// Simple Factory
class TrainingCamp {
    static func trainAdventurer(type: String) -> Adventurer? {
        switch type {
        case "archer":
            return Archer()
        case "warrior":
            return Warrior()
        default:
            return nil
        }
    }
}

let archer = TrainingCamp.trainAdventurer(type: "archer")
let warrior = TrainingCamp.trainAdventurer(type: "warrior")

assert(archer is Archer, "Didn't get the archer object!!")
assert(warrior is Warrior, "Didn't get the warrior object!!")