public bool Filter(int streamLookup, int streamIndexed, ExcludePlanFilterOperatorType opType, params ExprNode[] exprNodes)
{
EventBean @event = ExcludePlanHintExprUtil.ToEvent(streamLookup,
streamIndexed, _streamNames[streamLookup], _streamNames[streamIndexed],
opType.GetName().ToLower(), exprNodes);
if (_queryPlanLogging && QueryPlanLog.IsInfoEnabled)
{
QueryPlanLog.Info("Exclude-plan-hint combination " + EventBeanUtility.PrintEvent(@event));
}
EventBean[] eventsPerStream = new EventBean[] { @event };
var evaluateParams = new EvaluateParams(eventsPerStream, true, _exprEvaluatorContext);
foreach (ExprEvaluator evaluator in _evaluators)
{
var pass = evaluator.Evaluate(evaluateParams);
if (pass != null && true.Equals(pass))
{
if (_queryPlanLogging && QueryPlanLog.IsInfoEnabled)
{
QueryPlanLog.Info("Exclude-plan-hint combination : true");
}
return(true);
}
}
if (_queryPlanLogging && QueryPlanLog.IsInfoEnabled)
{
QueryPlanLog.Info("Exclude-plan-hint combination : false");
}
return(false);
}
public static ExcludePlanHint GetHint(String[] streamNames, StatementContext statementContext)
{
IList <String> hints = HintEnum.EXCLUDE_PLAN.GetHintAssignedValues(statementContext.Annotations);
if (hints == null)
{
return(null);
}
IList <ExprEvaluator> filters = new List <ExprEvaluator>();
foreach (String hint in hints)
{
if (string.IsNullOrWhiteSpace(hint))
{
continue;
}
ExprEvaluator evaluator = ExcludePlanHintExprUtil.ToExpression(hint, statementContext);
if (TypeHelper.GetBoxedType(evaluator.ReturnType) != typeof(bool?))
{
throw new ExprValidationException("Expression provided for hint " + HintEnum.EXCLUDE_PLAN.GetValue() + " must return a boolean value");
}
filters.Add(evaluator);
}
return(new ExcludePlanHint(streamNames, filters, statementContext));
}
