public override EvaluationResult evaluate <T1>(IEnumerable <T1> iterable, CalculationFunctions functions, string firstToken, IList <string> remainingTokens)
{
string token = firstToken.ToLower(Locale.ENGLISH);
int? index = Ints.tryParse(token);
if (index != null)
{
try
{
return(EvaluationResult.success(Iterables.get(iterable, index), remainingTokens));
}
catch (System.IndexOutOfRangeException)
{
return(invalidTokenFailure(iterable, token));
}
}
ISet <string> tokens = this.tokens(iterable);
foreach (object item in iterable)
{
if (!fieldValues(item).Contains(token))
{
continue;
}
if (!tokens.Contains(token))
{
return(ambiguousTokenFailure(iterable, token));
}
return(EvaluationResult.success(item, remainingTokens));
}
return(invalidTokenFailure(iterable, token));
}
// parse inflation lag with convention defaults
private static Period parseInflationLag(Optional <string> strOpt, Currency currency)
{
if (!strOpt.Present)
{
if (Currency.GBP.Equals(currency))
{
return(Period.ofMonths(2));
}
return(Period.ofMonths(3));
}
string str = strOpt.get();
int? months = Ints.tryParse(str);
if (months != null)
{
return(Period.ofMonths(months));
}
return(Tenor.parse(str).Period);
}
