public EventBean GetSubstituteEvent(
EventBean originalEvent,
bool isNewData,
int constantIndexNumber,
int relativeIndex,
ExprEvaluatorContext exprEvaluatorContext,
int streamNum)
{
return relativeAccess.GetRelativeToEvent(originalEvent, relativeIndex);
}
private EventBean GetSubstitute(
EventBean[] eventsPerStream,
ExprEvaluatorContext exprEvaluatorContext)
{
// Use constant if supplied
int? index;
if (isConstantIndex) {
index = constantIndexNumber;
}
else {
// evaluate first child, which returns the index
object indexResult = indexNode.Evaluate(eventsPerStream, true, exprEvaluatorContext);
if (indexResult == null) {
return null;
}
index = (indexResult).AsInt32();
}
// access based on index returned
EventBean substituteEvent;
if (randomAccessGetter != null) {
RandomAccessByIndex randomAccess = randomAccessGetter.Accessor;
if (!isTail) {
substituteEvent = randomAccess.GetNewData(index.Value);
}
else {
substituteEvent = randomAccess.GetNewDataTail(index.Value);
}
}
else {
EventBean evalEvent = eventsPerStream[streamNumber];
RelativeAccessByEventNIndex relativeAccess = relativeAccessGetter.GetAccessor(evalEvent);
if (relativeAccess == null) {
return null;
}
if (!isTail) {
substituteEvent = relativeAccess.GetRelativeToEvent(evalEvent, index.Value);
}
else {
substituteEvent = relativeAccess.GetRelativeToEnd(index.Value);
}
}
return substituteEvent;
}
public override EventBean GetSubstituteEvent(EventBean originalEvent, bool isNewData, int constantIndexNumber)
{
return(_relativeAccess.GetRelativeToEvent(originalEvent, constantIndexNumber));
}
public EventBean GetRelativeToEvent(EventBean theEvent, int prevIndex)
{
return(_buffer.GetRelativeToEvent(theEvent, _relativeIndex));
}
