Factory-Swift.swift

// Factory Method
public protocol Human {
    func getName()->String;
}

/// Tanaka Factory
final class TanakaImpl : Human {
    func getName() -> String {
        return "Tanaka";
    }
}

final public class TanakaFactory {
    public static func getInstance()-> Human {
        return TanakaImpl();
    }
}

/// Yamada Factory
final class YamadaImpl : Human {
    func getName() -> String {
        return "Yamada";
    }
}

final public class YamadaFactory {
    public static func getInstance()-> Human {
        return YamadaImpl();
    }
}

var human : Human = TanakaFactory.getInstance();
print(human.getName()); // Tanaka

human = YamadaFactory.getInstance();
print(human.getName()); // Yamada