RecyclerView + BindingAdapter [Kotlin]

recyclerview_item.xml

   <androidx.recyclerview.widget.RecyclerView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"      
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            bind:eventHandler="@{model.listEventHandler}"
            bind:items="@{model.listAddress}" />

RecyclerViewAdapter.kt

class RecyclerViewAdapter : RecyclerView.Adapter<BindingViewHolder>() {

    private val items = mutableListOf<RecyclerItem>()
    private var eventHandler: RecyclerViewHandler? = null

    override fun getItemCount(): Int {
        return items.size
    }

    override fun getItemViewType(position: Int): Int {
        return getItem(position).layoutId
    }

    override fun onCreateViewHolder(
        parent: ViewGroup,
        viewType: Int
    ): BindingViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        val binding: ViewDataBinding = DataBindingUtil.inflate(inflater, viewType, parent, false)
        return BindingViewHolder(binding)
    }

    override fun onBindViewHolder(
        holder: BindingViewHolder,
        position: Int
    ) {
        getItem(position).bind(holder.binding, eventHandler)
        holder.binding.executePendingBindings()
    }

    fun setEventHandler(handler: RecyclerViewHandler?) {
        eventHandler = handler
    }

    fun updateData(newItems: List<RecyclerItem>) {
        this.items.clear()
        this.items.addAll(newItems)
        notifyDataSetChanged()
    }

    private fun getItem(position: Int): RecyclerItem {
        return items[position]
    }
}

class BindingViewHolder(
    val binding: ViewDataBinding
) : RecyclerView.ViewHolder(binding.root)

RecyclerViewExtension.kt

object RecyclerViewExtension {

    @BindingAdapter(
        value = [
            "bind:items",
            "bind:eventHandler"
        ],
        requireAll = false
    )
    @JvmStatic
    fun RecyclerView.setItems(
        items: List<RecyclerItem>?,
        handler: RecyclerViewHandler?
    ) {
        this.itemAnimator = DefaultItemAnimator()
      
        var adapter = (this.adapter as? RecyclerViewAdapter)
        if (adapter == null) {
            adapter = RecyclerViewAdapter()
            this.adapter = adapter
        }

        adapter.setEventHandler(handler)
        adapter.updateData(items.orEmpty())
    }
}