/// <summary>
/// Query rules.
///
/// If RuleSet is null, then returns null.
/// </summary>
/// <param name="filterCriteria"></param>
/// <returns></returns>
/// <exception cref="Exception">Wrapped error</exception>
public IPluralRulesEnumerable Query(PluralRuleInfo filterCriteria)
{
if (filterCriteria.RuleSet == null)
{
return(null);
}
ResultLine line = GetRules(filterCriteria.RuleSet);
if (line.Error != null)
{
throw new Exception(line.Error.Message, line.Error);
}
if (line.Rules == null)
{
return(null);
}
if (line.Rules is IPluralRulesQueryable queryable)
{
// Set RuleSet to null
return(queryable.Query(filterCriteria.ChangeRuleSet(null)));
}
return(null);
}
/// <summary>
/// Try to resolve ruleset and evaluate number.
/// </summary>
/// <param name="subset"></param>
/// <param name="number"></param>
/// <returns></returns>
/// <exception cref="Exception">On wrapped error</exception>
public IPluralRule[] Evaluate(PluralRuleInfo subset, IPluralNumber number)
{
if (subset.RuleSet != null)
{
ResultLine line = GetRules(subset.RuleSet);
if (line.Error != null)
{
throw new Exception(line.Error.Message, line.Error);
}
if (line.Rules is IPluralRulesEvaluatable eval)
{
// Set RuleSet to null
return(eval.Evaluate(subset.ChangeRuleSet(null), number));
}
}
return(null);
}