// Adapter
public class GenericAdapter<T,K extends GenericViewHolder<T>>extends RecyclerView.Adapter<GenericViewHolder<T>> {
    private IItem.Counter counter;
    private IItem.Provider<T> provider;
    private HashMap<String,IItemActionListener> listeners;
    private IViewHolderProducer<K> viewHolderProducer;
    private int layoutId;

    public GenericAdapter(IItem.Counter counter, IItem.Provider<T> provider, HashMap<String, IItemActionListener> listeners, IViewHolderProducer<K> viewHolderProducer, int layoutId) {
        this.counter = counter;
        this.provider = provider;
        this.listeners = listeners;
        this.viewHolderProducer = viewHolderProducer;
        this.layoutId = layoutId;
    }

    @NonNull
    @Override
    public GenericViewHolder<T> onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(layoutId,viewGroup,false);
        return viewHolderProducer.produce(itemView);
   }

    @Override
    public void onBindViewHolder(@NonNull GenericViewHolder<T> holder, int itemPosition) {
        holder.bindItem(holder,provider.getItem(itemPosition),itemPosition);
    }

    @Override
    public int getItemCount() {
        return counter.getItemCount();
    }
}

// Przykładowy viewHolder
public class ViewHolder {

    public static class Country extends GenericViewHolder<Country>{
        private TextView countryName;

        public forCountry(@NonNull View itemView, HashMap<String, IItemActionListener> listeners) {
            super(itemView, listeners);
            countryName = (TextView) itemView.findViewById(R.id.item_country_name);
        }

        @Override
        public void bindItem(GenericViewHolder holders, Country item, int itemPosition) {

            ViewHolder.forCountry holder  = (forCountry) holders;
            holder.countryName.setText(item.getName());

            holder.itemView.setOnClickListener(view ->
            Objects.requireNonNull(getListeners().get("onclick")).onClick(itemPosition));
        }
    }
}
// Wywołanie utowrzenia adaptera przez prezenter

 void foo(){
 dbApi.labels().fetchSelected()
    .doOnSuccess((labels)->
        myView.setLabelAdapter((IItem.Provider<Label>) labels::get, labels::size, this.setOnClickListenersForLabels(list)))
    .subscribe();
 }

 // Inicjalizacja adaptera w widoku

 @Override
 public void setLabelAdapter(IItem.Provider itemProvider, IItem.Counter itemCounter, HashMap<String, IItemActionListener> listeners) {
     IViewHolderProducer<GenericViewHolder<Label>> producer = itemView -> new ViewHolder.forLabel(itemView,listeners);
     GenericAdapter<Label,GenericViewHolder<Label>> adapter = new GenericAdapter<>(itemCounter,itemProvider,listeners,producer,R.layout.recycler_item_label);
     recyclerView.setAdapter(adapter);
}

public interface IItemActionListener {
    void onClick(int itemPosition);
}