// No filter and with select clause
public virtual Object Evaluate(
EventBean[] eventsPerStream,
bool newData,
ICollection <EventBean> matchingEvents,
ExprEvaluatorContext exprEvaluatorContext,
ExprSubselectRowNode parent)
{
if (matchingEvents.Count > 1)
{
Log.Warn(parent.GetMultirowMessage());
return(null);
}
var events = EventBeanUtility.AllocatePerStreamShift(eventsPerStream);
events[0] = EventBeanUtility.GetNonemptyFirstEvent(matchingEvents);
Object result;
if (parent.SelectClauseEvaluator.Length == 1)
{
result = parent.SelectClauseEvaluator[0].Evaluate(new EvaluateParams(events, true, exprEvaluatorContext));
}
else
{
// we are returning a Map here, not object-array, preferring the self-describing structure
result = parent.EvaluateRow(events, true, exprEvaluatorContext);
}
return(result);
}
public static EventBean EvaluateFilterExpectSingleMatch(
EventBean[] eventsZeroSubselect,
bool newData,
ICollection <EventBean> matchingEvents,
ExprEvaluatorContext exprEvaluatorContext,
ExprSubselectRowNode parent)
{
var evaluateParams = new EvaluateParams(eventsZeroSubselect, newData, exprEvaluatorContext);
EventBean subSelectResult = null;
foreach (EventBean subselectEvent in matchingEvents)
{
// Prepare filter expression event list
eventsZeroSubselect[0] = subselectEvent;
var pass = parent.FilterExpr.Evaluate(evaluateParams);
if ((pass != null) && true.Equals(pass))
{
if (subSelectResult != null)
{
Log.Warn(parent.GetMultirowMessage());
return(null);
}
subSelectResult = subselectEvent;
}
}
return(subSelectResult);
}
// No filter and no select-clause: return underlying event
public virtual Object Evaluate(
EventBean[] eventsPerStream,
bool newData,
ICollection <EventBean> matchingEvents,
ExprEvaluatorContext exprEvaluatorContext,
ExprSubselectRowNode parent)
{
if (matchingEvents.Count > 1)
{
Log.Warn(parent.GetMultirowMessage());
return(null);
}
return(EventBeanUtility.GetNonemptyFirstEventUnderlying(matchingEvents));
}
public override Object Evaluate(
EventBean[] eventsPerStream,
bool newData,
ICollection <EventBean> matchingEvents,
ExprEvaluatorContext exprEvaluatorContext,
ExprSubselectRowNode parent)
{
if (matchingEvents.Count > 1)
{
Log.Warn(parent.GetMultirowMessage());
return(null);
}
var @event = EventBeanUtility.GetNonemptyFirstEvent(matchingEvents);
return(_tableMetadata.EventToPublic.ConvertToUnd(@event, new EvaluateParams(eventsPerStream, newData, exprEvaluatorContext)));
}