private IRuleFilter CompileFilters(IRuleDefinition ruleDefinition, List <Declaration> ruleDeclarations, IndexMap tupleFactMap)
{
var conditions = new List <IActivationExpression <bool> >();
var keySelectors = new List <IActivationExpression <object> >();
foreach (var filter in ruleDefinition.FilterGroup.Filters)
{
switch (filter.FilterType)
{
case FilterType.Predicate:
var condition = ExpressionCompiler.CompileActivationExpression <bool>(filter, ruleDeclarations, tupleFactMap);
conditions.Add(condition);
break;
case FilterType.KeyChange:
var keySelector = ExpressionCompiler.CompileActivationExpression <object>(filter, ruleDeclarations, tupleFactMap);
keySelectors.Add(keySelector);
break;
default:
throw new ArgumentOutOfRangeException($"Unrecognized filter type. FilterType={filter.FilterType}");
}
}
var compiledFilter = new RuleFilter(conditions, keySelectors);
return(compiledFilter);
}
