plp::DataRange *get_max(EnumSummaryPeriod period_type_param);
plp::DataRange *get_min(EnumSummaryPeriod period_type_param);
protected:
+ plp::Data *get_year_oldest_data();
+ plp::Data *get_year_newest_data();
static std::string get_dir_name(std::string device_id_param,
Date *date_time_param,
EnumSummaryPeriod period_type_param,