public IEnumerator <EventBean> ObtainEnumerator(Viewable parent)
{
if (_orderByProcessor == null)
{
return(ResultSetAggregateAllEnumerator.New(parent, this, _exprEvaluatorContext));
}
// Pull all parent events, generate order keys
var eventsPerStream = new EventBean[1];
var outgoingEvents = new List <EventBean>();
var orderKeys = new List <object>();
var evaluateParams = new EvaluateParams(eventsPerStream, true, _exprEvaluatorContext);
foreach (var candidate in parent)
{
eventsPerStream[0] = candidate;
object pass = true;
if (_prototype.OptionalHavingNode != null)
{
pass = _prototype.OptionalHavingNode.Evaluate(evaluateParams);
}
if ((pass == null) || (false.Equals(pass)))
{
continue;
}
outgoingEvents.Add(_selectExprProcessor.Process(eventsPerStream, true, true, _exprEvaluatorContext));
var orderKey = _orderByProcessor.GetSortKey(eventsPerStream, true, _exprEvaluatorContext);
orderKeys.Add(orderKey);
}
// sort
var outgoingEventsArr = outgoingEvents.ToArray();
var orderKeysArr = orderKeys.ToArray();
var orderedEvents = _orderByProcessor.Sort(outgoingEventsArr, orderKeysArr, _exprEvaluatorContext) ?? EMPTY_EVENT_BEAN_LIST;
return(orderedEvents.GetEnumerator());
}
public IEnumerator <EventBean> ObtainIterator(Viewable parent)
{
if (_orderByProcessor == null)
{
return(ResultSetAggregateAllEnumerator.New(parent, this, _exprEvaluatorContext));
}
// Pull all parent events, generate order keys
EventBean[] eventsPerStream = new EventBean[1];
IList <EventBean> outgoingEvents = new List <EventBean>();
IList <Object> orderKeys = new List <Object>();
var evaluateParams = new EvaluateParams(eventsPerStream, true, _exprEvaluatorContext);
foreach (EventBean candidate in parent)
{
eventsPerStream[0] = candidate;
bool?pass = true;
if (_prototype.OptionalHavingNode != null)
{
pass = (bool?)_prototype.OptionalHavingNode.Evaluate(evaluateParams);
}
if ((pass == null) || (!pass.Value))
{
continue;
}
outgoingEvents.Add(_selectExprProcessor.Process(eventsPerStream, true, true, _exprEvaluatorContext));
Object orderKey = _orderByProcessor.GetSortKey(eventsPerStream, true, _exprEvaluatorContext);
orderKeys.Add(orderKey);
}
// sort
EventBean[] outgoingEventsArr = outgoingEvents.ToArray();
Object[] orderKeysArr = orderKeys.ToArray();
EventBean[] orderedEvents = _orderByProcessor.Sort(outgoingEventsArr, orderKeysArr, _exprEvaluatorContext);
return(((IEnumerable <EventBean>)orderedEvents).GetEnumerator());
}
