public object Evaluate(
EventBean[] eventsPerStream,
ExprEvaluatorContext exprEvaluatorContext)
{
IEnumerator<EventBean> events;
int size;
if (randomAccessGetter != null) {
RandomAccessByIndex randomAccess = randomAccessGetter.Accessor;
events = randomAccess.GetWindowEnumerator();
size = (int) randomAccess.WindowCount;
}
else {
EventBean evalEvent = eventsPerStream[streamNumber];
RelativeAccessByEventNIndex relativeAccess = relativeAccessGetter.GetAccessor(evalEvent);
if (relativeAccess == null) {
return null;
}
size = relativeAccess.WindowToEventCount;
events = relativeAccess.WindowToEvent;
}
if (size <= 0) {
return null;
}
EventBean originalEvent = eventsPerStream[streamNumber];
Array result = Array.CreateInstance(componentType, size);
for (int i = 0; i < size; i++) {
events.MoveNext();
eventsPerStream[streamNumber] = events.Current;
result.SetValue(evalNode.Evaluate(eventsPerStream, true, exprEvaluatorContext), i);
}
eventsPerStream[streamNumber] = originalEvent;
return result;
}
public ICollection<object> EvaluateGetCollScalar(
EventBean[] eventsPerStream,
ExprEvaluatorContext context)
{
IEnumerator<EventBean> events;
int size;
if (randomAccessGetter != null) {
RandomAccessByIndex randomAccess = randomAccessGetter.Accessor;
events = randomAccess.GetWindowEnumerator();
size = (int) randomAccess.WindowCount;
}
else {
EventBean evalEvent = eventsPerStream[streamNumber];
RelativeAccessByEventNIndex relativeAccess = relativeAccessGetter.GetAccessor(evalEvent);
if (relativeAccess == null) {
return null;
}
size = relativeAccess.WindowToEventCount;
events = relativeAccess.WindowToEvent;
}
if (size <= 0) {
return Collections.GetEmptyList<object>();
}
EventBean originalEvent = eventsPerStream[streamNumber];
Deque<object> deque = new ArrayDeque<object>(size);
for (int i = 0; i < size; i++) {
events.MoveNext();
eventsPerStream[streamNumber] = events.Current;
object evalResult = evalNode.Evaluate(eventsPerStream, true, context);
deque.Add(evalResult);
}
eventsPerStream[streamNumber] = originalEvent;
return deque;
}