public RegexPartitionStateRandomAccess GetAccess(ExprEvaluatorContext exprEvaluatorContext)
{
int agentInstanceId = exprEvaluatorContext.AgentInstanceId;
RegexExprPreviousEvalStrategy strategy = _strategies.Array[agentInstanceId];
return(strategy.GetAccess(exprEvaluatorContext));
}
public object Evaluate(EvaluateParams evaluateParams)
{
var access = _strategy.GetAccess(evaluateParams.ExprEvaluatorContext);
var substituteEvent = access.GetPreviousEvent(_assignedIndex);
if (substituteEvent == null)
{
return(null);
}
// Substitute original event with prior event, evaluate inner expression
var eventsPerStream = evaluateParams.EventsPerStream;
var originalEvent = eventsPerStream[_streamNumber];
eventsPerStream[_streamNumber] = substituteEvent;
var evalResult = _evaluator.Evaluate(evaluateParams);
eventsPerStream[_streamNumber] = originalEvent;
return(evalResult);
}
public RegexPartitionStateRandomAccess GetAccess(ExprEvaluatorContext exprEvaluatorContext)
{
return(_strategy.GetAccess(exprEvaluatorContext));
}