Package com.espertech.esper.epl.subquery

Examples of com.espertech.esper.epl.subquery.SubselectAggregationPreprocessorBase.evaluate()

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            ExprSubselectStrategy strategy;
            if (aggregationPreprocessor != null) {
                strategy = new ExprSubselectStrategy() {
                    public Collection<EventBean> evaluateMatching(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) {
                        Collection<EventBean> matchingEvents = lookupStrategy.lookup(eventsPerStream, exprEvaluatorContext);
                        aggregationPreprocessor.evaluate(eventsPerStream, matchingEvents, exprEvaluatorContext);
                        return CollectionUtil.SINGLE_NULL_ROW_EVENT_SET;
                    }
                };
            }
            else {
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            ExprSubselectStrategy strategy;
            if (aggregationPreprocessor != null) {
                strategy = new ExprSubselectStrategy() {
                    public Collection<EventBean> evaluateMatching(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) {
                        Collection<EventBean> matchingEvents = lookupStrategy.lookup(eventsPerStream, exprEvaluatorContext);
                        aggregationPreprocessor.evaluate(eventsPerStream, matchingEvents, exprEvaluatorContext);
                        return CollectionUtil.SINGLE_NULL_ROW_EVENT_SET;
                    }
                };
            }
            else {
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