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;
}