Handing model binding with payloads

[cyberneticbytedreamer]

Hello, I'm reaching out to inquire about the correctness of my implementation for handling model binding with payloads in the Epoxy library. I fully understand, in such use-case, using the concept of payloads may not provide significant efficiency benefits. However, I'm exploring this library and I want just understand fundamental concepts, including working with payloads.

And the most important question for me, should I call super.bind(view, previouslyBoundModel) when payloads is empty?

@EpoxyModelClass
abstract class SampleModel : EpoxyModel<View>() {
    companion object {
        private const val FIRST_CHANGED = 0
        private const val SECOND_CHANGED = 1
        private const val THIRD_CHANGED = 2
    }

    @EpoxyAttribute
    lateinit var first: Int

    @EpoxyAttribute
    lateinit  var second: Int

    @EpoxyAttribute
    lateinit  var third: Int

    override fun getDefaultLayout() = R.layout.item_sample

    override fun bind(view: View, previouslyBoundModel: EpoxyModel<*>) {
        if (previouslyBoundModel !is SampleModel)
            return super.bind(view, previouslyBoundModel)

        val payloads = mutableListOf<Any>()

        if (first != previouslyBoundModel.first)
            payloads.add(FIRST_CHANGED)

        if (second != previouslyBoundModel.second)
            payloads.add(SECOND_CHANGED)

        if (third != previouslyBoundModel.third)
            payloads.add(THIRD_CHANGED)

        if (payloads.isNotEmpty())
            bind(view, payloads)
    }

    override fun bind(view: View, payloads: MutableList<Any>) {
        if (payloads.contains(FIRST_CHANGED))
            view.first.text = first.toString()

        if (payloads.contains(SECOND_CHANGED))
            view.second.text = second.toString()

        if (payloads.contains(THIRD_CHANGED))
            view.third.text = third.toString()
    }

    override fun bind(view: View) {
        view.first.text = first.toString()
        view.second.text = second.toString()
        view.third.text = third.toString()
    }
}