public ValueEval Evaluate(ValueEval[] args, OperationEvaluationContext ec)
{
if (args.Length < 3 || args.Length % 2 == 0)
{
return(ErrorEval.VALUE_INVALID);
}
try
{
AreaEval sumRange = ConvertRangeArg(args[0]);
// collect pairs of ranges and criteria
AreaEval[] ae = new AreaEval[(args.Length - 1) / 2];
IMatchPredicate[] mp = new IMatchPredicate[ae.Length];
for (int i = 1, k = 0; i < args.Length; i += 2, k++)
{
ae[k] = ConvertRangeArg(args[i]);
mp[k] = Countif.CreateCriteriaPredicate(args[i + 1], ec.RowIndex, ec.ColumnIndex);
}
ValidateCriteriaRanges(ae, sumRange);
double result = SumMatchingCells(ae, mp, sumRange);
return(new NumberEval(result));
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
}
private static ValueEval Eval(int srcRowIndex, int srcColumnIndex, ValueEval arg1, AreaEval aeRange,
AreaEval aeSum)
{
// TODO - junit to prove last arg must be srcColumnIndex and not srcRowIndex
IMatchPredicate mp = Countif.CreateCriteriaPredicate(arg1, srcRowIndex, srcColumnIndex);
double result = SumMatchingCells(aeRange, mp, aeSum);
return(new NumberEval(result));
}
