Abstract_Factory_Pattern

Abstract_Factory_Pattern.swift

protocol Button {
    func paint()
}

protocol GUIFactory {
    func createButton() -> Button
}

class WinButton: Button {
    func paint() {
        println("Painting WinButton")
    }
}

class OSXButton: Button {
    func paint() {
        println("Painting OSXButton")
    }
}

class WinFactory: GUIFactory {
    func createButton() -> Button {
        return WinButton()
    }
}

class OSXFactory:GUIFactory {
    func createButton() -> Button {
        return OSXButton()
    }
}

class Application {
    init(factory: GUIFactory) {
        let button: Button = factory.createButton()
        button.paint()
    }
}

//**Usage**
func createOsSpecificFactory(OS: Int) -> GUIFactory {
    if OS == 0 {
        return WinFactory()
    } else {
        return OSXFactory()
    }
}
let someApplication: Application = Application( factory: createOsSpecificFactory(0))