Реализации на Kotlin

Factory method

Общая реализация на языке Kotlin

Реализация классов машин

ICar

interface ICar {
    val model: String
    fun drive()
    fun getDescription(): String
}

Audi

class Audi: ICar {
    override val model: String = "A7"
    override fun drive() {
        println("Rides like an iron")
    }

    override fun getDescription(): String = "Brand: Audi, model: A7, revision: ${this.hashCode()}"
}

Bmw

class Bmw: ICar {
    override val model: String = "3 series"

    override fun drive() {
        println("No one knows when the driver will change lanes")
    }

    override fun getDescription(): String = "Brand: Bmw, model: 3 series, revision: ${this.hashCode()}"
}

Bugatti

open class Bugatti protected constructor(): ICar {
    override val model: String = "Chiron"

    override fun drive() {
        println("Drive like a boss")
    }

    override fun getDescription(): String = "Brand: Bugatti, model: Chiron, revision: ${this.hashCode()}"
}

Реализация классов фабрик машин

CarFactory

abstract class CarFactory {
    abstract fun createCar(): ICar
}

AudiFactory

class AudiFactory: CarFactory() {
    override fun createCar(): Audi = Audi()
}

BmwFactory

class BmwFactory: CarFactory() {
    override fun createCar(): Bmw {
        return Bmw()
    }
}

BugattiFactory

class BugattiFactory : CarFactory() {
    override fun createCar(): Bugatti {
        class ConcreteBugatti : Bugatti()
        return ConcreteBugatti()
    }
}

fun main() {
    val audi = Audi() // можно создавать объект там где необходимо
    val audiFactory: CarFactory = AudiFactory()
    val audi1 = audiFactory.createCar()
    println(audi1.getDescription())
    audi1.drive()

    val audi2 = audiFactory.createCar()
    println(audi2.getDescription())
    audi2.drive()

    val bmw = Bmw() // можно создавать объект там где необходимо
    val bmwFactory: CarFactory = BmwFactory()
    val bmw1 = bmwFactory.createCar()
    println(bmw1.getDescription())
    bmw1.drive()

//    val bugatti = Bugatti() // ошибка компиляции, нельзя вызвать protected constructor
    val bugattiFactory = BugattiFactory()
    val bugatti1: Bugatti = bugattiFactory.createCar()
    println(bugatti1.getDescription())
    bugatti1.drive()

    val bugatti2: Bugatti = bugattiFactory.createCar()
    println(bugatti2.getDescription())
    bugatti2.drive()
}