communicate-v-and-p-bus-w_bus

class WeatherCommunicationBus implements WeatherView, WeatherPresenter {

    private static final String VIEW_STATE_KEY = "VIEW_STATE";
    private WeatherViewState mViewState;
    private WeatherPresenter mPresenter;
    private WeatherView mView;
    
    public WeatherCommunicationBus(WeatherPresenter presenter) { 
      mPresenter = presenter;
      mViewState = createViewState();
      mPresenter.attachView(this);
    }

    private WeatherViewState createViewState() {
        return new WeatherViewState();
    }

    @Override
    public void showLoading() {
        mViewState.setStateShowLoading();
        if (mView != null) { mView.showLoading(); }
    }

    @Override
    public void hideLoading() {
        mViewState.setStateHideLoading();
        if (mView != null) { mView.hideLoading(); }
    }

    @Override
    public void setData(WeatherViewModel data) {
        if (mView != null) { mView.setData(data); }
    }

    @Override
    public void showContent() {
        mViewState.setStateShowContent();
        if (mView != null) { mView.showContent(); }
    }

    @Override
    public void showError(WeatherError error) {
        mViewState.setStateShowError(error);
        if (mView != null) { mView.showError(error); }
    }

    // presenter
    @Override
    public void loadWeather() {
      mPresenter.loadWeather(); 
    }

    @Override
    public void attachView(WeatherView view) {
      mView = view; 
      mViewState.apply(view);
    }

    @Override
    public void detachView() { 
      mView = null; 
    }

    @Override
    public void onCreate(@Nullable Bundle arguments, @Nullable Bundle savedInstanceState) {
        mPresenter.onCreate(arguments, savedInstanceState);
        if (savedInstanceState != null) {
            if (savedInstanceState.containsKey(VIEW_STATE_KEY)) {
                mViewState = savedInstanceState.getParcelable(VIEW_STATE_KEY);
            }
        }
    }

    @Override
    public void onSaveInstanceState(Bundle bundle) { 
      mPresenter.onSaveInstanceState(bundle); 
      bundle.putParcelable(VIEW_STATE_KEY, mViewState);
    }

    @Override
    public void onDestroy() { 
      mPresenter.detachView();
      mPresenter.onDestroy(); 
    }
}