if (to==null){
to = copperMonitoringService.getMonitoringDataMaxDate();
}
final AggregateFunction<SystemResourcesInfo, SystemResourcesInfo> aggregateFunction =new AggregateSystemRessourceAvg();
final TimeConverter<SystemResourcesInfo> dateConverter = new SystemResourcesInfoDateConverter();
final StatisticCreator<SystemResourcesInfo, SystemResourcesInfo> statisticCreator = new StatisticCreator<SystemResourcesInfo,SystemResourcesInfo>(TimeframeGroup.<SystemResourcesInfo, SystemResourcesInfo>createGroups(
groupCount,from,to,aggregateFunction, dateConverter));
List<List<SystemResourcesInfo>> statisticCreators = copperMonitoringService.createStatistic(