Snippet for zipping multiple weather calls

WeatherInteractorImpl.java

public class WeatherInteractorImpl extends BaseInteractor implements WeatherInteractor {

    private final static String API_KEY = "";
    private final static String UNIT = "si";
    private final static int DAY_INCREMENT = 1;
    private final static long UNIX_TIME_CONVERSION_CONSTANT = 1000L;
  
    @Override
    public Observable<WeatherModel> getWeatherForecastDaily(LatLng latLng, Action1 onNextAction, Action1 onErrorAction) {
        Calendar calendar = Calendar.getInstance();

        Observable<WeatherModel> dayOneObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> dayTwoObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> dayThreeObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> dayFourObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> dayFiveObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> daySixObservable = getWeatherObservable(latLng, calendar);
        Observable<WeatherModel> daySevenObservable = getWeatherObservable(latLng, calendar);

        Observable zippedObservable = Observable.zip(dayOneObservable, dayTwoObservable, dayThreeObservable, dayFourObservable,
                dayFiveObservable, daySixObservable, daySevenObservable, (dayOneInfo, dayTwoInfo,
                                                                          dayThreeInfo, dayFourInfo,
                                                                          dayFiveInfo, daySixInfo,
                                                                          daySevenInfo) -> {

                    ArrayList<WeatherModel> weatherInfos = new ArrayList<>();
                    weatherInfos.add(dayOneInfo);
                    weatherInfos.add(dayTwoInfo);
                    weatherInfos.add(dayThreeInfo);
                    weatherInfos.add(dayFourInfo);
                    weatherInfos.add(dayFiveInfo);
                    weatherInfos.add(daySixInfo);
                    weatherInfos.add(daySevenInfo);

                    return weatherInfos;
                });

        return zippedObservable;
    }

    private Observable<WeatherModel> getWeatherObservable(LatLng latLng, Calendar calendar) {
        Observable<WeatherModel> weatherObservable = retrofitServices.getWeatherDaily(API_KEY,
                String.valueOf(latLng.latitude) + "," + String.valueOf(latLng.longitude) + ","
                        + calendar.getTimeInMillis() / UNIX_TIME_CONVERSION_CONSTANT, UNIT);

        calendar.add(Calendar.DATE, DAY_INCREMENT);

        return weatherObservable;
    }
}