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The current version can run, but it must be poorly written.

List<? extends WeatherData> data =  weatherReportDao.getCoviReportData(reportType);
WeatherENUM weatherENUM = WeatherENUM.valueOf(reportFunction);
switch (weatherENUM){
            case atmosphere:
                data =  atmosphereReportDao.getAtmosphereReportData(reportType);
                break;
            case covi:
                 data =  weatherReportDao.getCoviReportData(reportType);
                break;
            case windSpeed:
                data = windSpeedReportDao.getWindSpeedReportData(reportType);
                break;
        }
        return data;

The key is the initialization of data. If not initialized, an error will be reported. Ask for guidance.