ret_val = NULL;
y_list = FileUtil::get_subdirectories(device_dir);
- ret_val = find_latest_data(y_list);
+ if (y_list.size() > 0) {
+ ret_val = find_latest_data(y_list);
+ }
return ret_val;
}
* Get Daily summary specified by the calc_type from the latest date.
*/
DataRange *DataReader::get_daily_summary(EnumSummaryCalculationType calc_type_param) {
- Data *data;
- Date date;
+ Data *data;
+ Date date;
+ DataRange *ret_val;
+ ret_val = NULL;
data = get_latest_data();
- date = data->get_date();
- return get_daily_summary(&date, calc_type_param);
+ if (data != NULL) {
+ date = data->get_date();
+ ret_val = get_daily_summary(&date, calc_type_param);
+ }
+ return ret_val;
}
DataRange *DataReader::get_daily_summary(Date *date,
}
/**
- * Read device type from the device specific config file
+ * Read device type from the device specific config file.
+ *
+ * @rerurn string representing device type.
+ * In the case of error, an empty string is returned.
*/
string DataReader::get_device_type() {
string ret_val;
if (device_config == NULL) {
device_config = DeviceConfig::get_device_config(device_id);
- ret_val = device_config->get_cfg_value(DEVICE_CONFIG_VALUE_KEY__TYPE);
+ }
+ if (device_config != NULL) {
+ ret_val = device_config->get_config_value(DEVICE_CONFIG_VALUE_KEY__TYPE);
}
return ret_val;
}