public AggregationStateFactory MakeFactory()
{
var sortUsingCollator = _methodResolutionService.IsSortUsingCollator;
var comparator = CollectionUtil.GetComparator(_evaluators, sortUsingCollator, _sortDescending);
var criteriaKeyBinding = _methodResolutionService.GetCriteriaKeyBinding(_evaluators);
AggregationStateFactory factory;
if (_ever)
{
var spec = new AggregationStateMinMaxByEverSpec(_streamNum, _evaluators, _parent.IsMax, comparator, criteriaKeyBinding);
factory = new ProxyAggregationStateFactory()
{
ProcCreateAccess = (methodResolutionService, agentInstanceId, groupId, aggregationId, join, groupKey) => methodResolutionService.MakeAccessAggMinMaxEver(agentInstanceId, groupId, aggregationId, spec),
ProcAggregationExpression = () => _parent,
};
}
else
{
var spec = new AggregationStateSortedSpec(_streamNum, _evaluators, comparator, criteriaKeyBinding);
factory = new ProxyAggregationStateFactory()
{
ProcCreateAccess = (methodResolutionService, agentInstanceId, groupId, aggregationId, join, groupKey) => {
if (join)
{
return(methodResolutionService.MakeAccessAggSortedJoin(agentInstanceId, groupId, aggregationId, spec));
}
return(methodResolutionService.MakeAccessAggSortedNonJoin(agentInstanceId, groupId, aggregationId, spec));
},
ProcAggregationExpression = () => _parent,
};
}
return(factory);
}
