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(new EvaluateParams(eventsPerStream, true, exprEvaluatorContext));
if (indexResult == null)
{
return(null);
}
index = indexResult.AsInt();
}
// 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
{
var evalEvent = eventsPerStream[_streamNumber];
var relativeAccess = _relativeAccessGetter.GetAccessor(evalEvent);
if (relativeAccess == null)
{
return(null);
}
if (!_isTail)
{
substituteEvent = relativeAccess.GetRelativeToEvent(evalEvent, index.Value);
}
else
{
substituteEvent = relativeAccess.GetRelativeToEnd(evalEvent, index.Value);
}
}
return(substituteEvent);
}
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;
}