communicate-v-and-p-viewstate-full

public class WeatherViewState implements ViewState<WeatherView>, Parcelable {

    private final static int STATE_UNINITIALIZED = -1;
    private final static int STATE_DEFAULT = 0;
    private final static int STATE_SHOW_LOADING = 1;
    private final static int STATE_SHOW_ERROR = 2;

    private int mCurrentState = 0;
    private WeatherView.WeatherError mError;
    private WeatherViewModel mModel;

    public WeatherViewState() {
        mCurrentState = STATE_UNINITIALIZED;
    }

    public void setData(WeatherViewModel model) {
        mModel = model;
    }

    public void setStateShowContent() {
        mCurrentState = STATE_DEFAULT;
    }

    public void setStateShowLoading() {
        mCurrentState = STATE_SHOW_LOADING;
    }

    public void setStateHideLoading() {
        if (mCurrentState != STATE_SHOW_ERROR) { // to avoid such things use State pattern
            mCurrentState = STATE_DEFAULT;
            mError = null;
        }
    }

    public void setStateShowError(WeatherView.WeatherError error) {
        mCurrentState = STATE_SHOW_ERROR;
        mError = error;
    }

    @Override
    public void apply(WeatherView view) {
        if (mModel != null) {
            view.setData(mModel);
            view.showContent();
        }
        switch (mCurrentState) {
            case STATE_SHOW_LOADING:
                view.showLoading();
                break;
            case STATE_SHOW_ERROR:
                view.showError(mError);
                break;
            default:
                break;
        }
    }

    // PARCELABLE

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(this.mCurrentState);
        dest.writeInt(this.mError == null ? -1 : this.mError.ordinal());
        dest.writeParcelable(this.mModel, 0);
    }

    protected WeatherViewState(Parcel in) {
        this.mCurrentState = in.readInt();
        int tmpMError = in.readInt();
        this.mError = tmpMError == -1 ? null : WeatherView.WeatherError.values()[tmpMError];
        this.mModel = in.readParcelable(WeatherViewModel.class.getClassLoader());
    }

    public static final Creator<WeatherViewState> CREATOR = new Creator<WeatherViewState>() {
        public WeatherViewState createFromParcel(Parcel source) {
            return new WeatherViewState(source);
        }

        public WeatherViewState[] newArray(int size) {
            return new WeatherViewState[size];
        }
    };
}