private static ParseResult <int> GetIntColumnValue(OperatorPair operatorPair, Feature feature)
{
int currentValue = 0;
bool isFailed = true;
if (feature.ColumnValues.ContainsKey(operatorPair.ColumnName))
{
isFailed = !Int32.TryParse(feature.ColumnValues[operatorPair.ColumnName], out currentValue);
}
return(new ParseResult <int>(currentValue, isFailed));
}
private static void DissolveNumbers(IEnumerable <Feature> groupFeature
, Dictionary <string, string> newColumnValues
, OperatorPair operatorPair
, Func <IEnumerable <double>, double> processDouble
, Func <IEnumerable <int>, int> processInt = null)
{
if (operatorPair.ColumnType.Equals("Integer", StringComparison.OrdinalIgnoreCase))
{
var parseResults = groupFeature.Select(f => GetIntColumnValue(operatorPair, f)).ToArray();
if (parseResults.All(r => r.IsFailed))
{
newColumnValues.Add(operatorPair.ColumnName, string.Empty);
}
else
{
if (processInt != null)
{
int intSum = processInt(parseResults.Where(r => !r.IsFailed).Select(r => r.Result));
newColumnValues.Add(operatorPair.ColumnName, intSum.ToString());
}
else
{
double doubleSum = processDouble(parseResults.Where(r => !r.IsFailed)
.Select(r => (double)r.Result));
newColumnValues.Add(operatorPair.ColumnName, doubleSum.ToString());
}
}
}
else if (operatorPair.ColumnType.Equals("Double", StringComparison.OrdinalIgnoreCase) ||
operatorPair.ColumnType.Equals("String", StringComparison.OrdinalIgnoreCase))
{
var parseResults = groupFeature.Select(f => GetDoubleColumnValue(operatorPair, f)).ToArray();
if (parseResults.All(r => r.IsFailed))
{
newColumnValues.Add(operatorPair.ColumnName, string.Empty);
}
else
{
double doubleSum = processDouble(parseResults.Where(r => !r.IsFailed).Select(r => r.Result));
newColumnValues.Add(operatorPair.ColumnName, doubleSum.ToString());
}
}
}
private static Feature CollectNewColumnValues(IGrouping <string, Feature> groupFeature, Dictionary <string, string> newColumnValues, OperatorPair operatorPair)
{
Feature feature = new Feature();
switch (operatorPair.Operator)
{
case DissolveOperatorMode.First:
feature = groupFeature.FirstOrDefault();
if (feature.GetShape() != null)
{
newColumnValues.Add(operatorPair.ColumnName, feature.ColumnValues[operatorPair.ColumnName]);
}
break;
case DissolveOperatorMode.Last:
feature = groupFeature.LastOrDefault();
if (feature.GetShape() != null)
{
newColumnValues.Add(operatorPair.ColumnName, feature.ColumnValues[operatorPair.ColumnName]);
}
break;
case DissolveOperatorMode.Count:
newColumnValues.Add(operatorPair.ColumnName, groupFeature.Count().ToString());
break;
case DissolveOperatorMode.Sum:
DissolveNumbers(groupFeature
, newColumnValues
, operatorPair
, rs => rs.Sum()
, rs => rs.Sum());
break;
case DissolveOperatorMode.Average:
DissolveNumbers(groupFeature
, newColumnValues
, operatorPair
, rs => rs.Average());
break;
case DissolveOperatorMode.Min:
DissolveNumbers(groupFeature
, newColumnValues
, operatorPair
, rs => rs.Min()
, rs => rs.Min());
break;
case DissolveOperatorMode.Max:
DissolveNumbers(groupFeature
, newColumnValues
, operatorPair
, rs => rs.Max()
, rs => rs.Max());
break;
}
return(feature);
}
