public List <InstrumentSearchModel> getFilteredInstruments(string filter, List <InstrumentSearchModel> instrumentList, string selectedMatchAlgo, double threshold)
{
List <InstrumentModel> instruments = new List <InstrumentModel>();
InstrumentListDAO instrumentData = new InstrumentListDAO();
try
{
//Get all instruments
instruments = instrumentData.GetData();
}
catch (DAOException ex)
{
if (ex.GetErrorCode() == DAOException.FILE_NA)
{
throw new ServiceException(ServiceException.DATA_ACCESS_ERROR, "Could not get data for instruments", ex);
}
else if (ex.GetErrorCode() == DAOException.FILE_PARSE_ERROR)
{
throw new ServiceException(ServiceException.DATA_ACCESS_ERROR, "Could not get data for instruments", ex);
}
else if (ex.GetErrorCode() == DAOException.UNKNOWN_ERROR)
{
throw new ServiceException(ServiceException.UNKNOWN_ERROR, "Could not get data for instruments", ex);
}
}
List <InstrumentSearchModel> filteredInstruments = new List <InstrumentSearchModel>();
if (instruments != null)
{
//Fuzzy logic filtering
foreach (InstrumentModel instrument in instruments)
{
double distance;
if (selectedMatchAlgo == "Levenshtein Distance")
{
distance = (double)distanceCalc.CalculateLevenshteinDistance(filter, instrument.InstrumentName);
}
else if (selectedMatchAlgo == "Dice Coefficient")
{
distance = Math.Round(DiceCoefficientExtensions.DiceCoefficient(filter, instrument.InstrumentName), 2) * 100;
}
else
{
throw new ArgumentException("Could not find matching algorithm supplied please try again");
}
if (distance >= threshold)
{
InstrumentSearchModel instrumentSearch = new InstrumentSearchModel(instrument.Identifier, instrument.InstrumentName, distance);
filteredInstruments.Add(instrumentSearch);
}
}
}
return(filteredInstruments.OrderByDescending(x => x.MatchLikelihood).ToList());
}
//Currently unused method for getting all instruments with no filter
public List <InstrumentSearchModel> getAllInstruments()
{
List <InstrumentModel> instruments = new List <InstrumentModel>();
InstrumentListDAO instrumentData = new InstrumentListDAO();
instruments = instrumentData.GetData();
List <InstrumentSearchModel> instrumentsList = new List <InstrumentSearchModel>();
foreach (InstrumentModel instrument in instruments)
{
InstrumentSearchModel instrumentSearch = new InstrumentSearchModel(instrument.Identifier, instrument.InstrumentName, 0);
instrumentsList.Add(instrumentSearch);
}
return(instrumentsList.OrderByDescending(x => x.MatchLikelihood).ToList());
}
