protected override DataStreamUnit[] _Execute(DataStreamUnit[] source)
        {
            try
            {
                if (!_initialized)
                {
                    _forecast = new Forecast() { ForecastModelId = this.ForecastModelId };
                    _measurement = repository.FirstOrDefault(x => x.MeasurementId == this.MeasurementId);
                    if (_measurement == null)
                    {
                        _measurement = new Measurement {MeasurementId = this.MeasurementId};
                    }

                    _measurement.Forecasts.Add(_forecast);
                    _initialized = true;
                }

                var data = source.ToList();

                var result = new ForecastResult();
                if (data[0].Values.ContainsKey("MAPE"))
                {
                    result.Error = data[0].Values["MAPE"] as double?;
                }
                result.TimeStamp = (DateTime)data[0].Values["TimeStamp"];
                result.RealValue = data[0].Values["Value"] as double?;
                result.PredictedValue = data[0].Values["PredictedValue"] as double?;

                _forecast.Error = result.Error;
                _forecast.Results.Add(result);
                repository.Update(_measurement);
            }
            catch (Exception e)
            {
                Logging.Info(e.Message);
            }

            return source;
        }
        private ChartViewModel GetChart(Forecast forecast)
        {
            var model = new ChartViewModel();
            model.ChartName = forecast.ForecastModelId;

            var results = forecast.Results;
            var values = GetValuesForChart(results);

            model.ChartData = JsonConvert.SerializeObject(values);
            var lastDate = forecast.Results.LastOrDefault().TimeStamp;
            //lastDate = lastDate.AddHours(12).Date; //округляем до ближайшего дня
            model.Error = CalculateMAPE(forecast.Results.SkipWhile(x => x.TimeStamp < testStartDateProvider.GetTimestampOfTestStart(lastDate)));

            return model;
        }