Examples of com.espertech.esper.epl.expression.ExprEvaluator.evaluate()

Package com.espertech.esper.epl.expression

Class com.espertech.esper.epl.expression.ExprEvaluator

Examples of com.espertech.esper.epl.expression.ExprEvaluator.evaluate()

com.espertech.esper.epl.expression.ExprEvaluator.evaluate()
Evaluate event tuple and return result. @param eventsPerStream - event tuple @param isNewData - indicates whether we are dealing with new data (istream) or old data (rstream) @param context context for expression evaluation @return evaluation result, a boolean value for OR/AND-type evalution nodes.

        ExprEvaluator cachedExpr = cachedMaxEvaluatorPerChild[position];
        if (cachedExpr == null) {
            return -1;  // no limit defined for this sub-expression
        }


        Number result = (Number) cachedExpr.evaluate(null, true, null);
        if (result != null) {
            return result.intValue();
        }
        return -1;  // no limit
    }

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            ArrayDeque<EventBean> list = new ArrayDeque<EventBean>();
            EventBean[] eventsPerStream = new EventBean[1];
            while (it.hasNext()) {
                EventBean event = it.next();
                eventsPerStream[0] = event;
                Boolean result = (Boolean) evaluator.evaluate(eventsPerStream, true, exprEvaluatorContext);
                if ((result != null) && result) {
                    list.add(event);
                }
            }
            return list;

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            ExprEvaluator whereClause = entry.getOptionalWhereClause();
            if (whereClause != null)
            {
                if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qUpdateIStreamApplyWhere();}
                Boolean result = (Boolean) whereClause.evaluate(eventsPerStream, true, exprEvaluatorContext);
                if ((result == null) || (!result))
                {
                    if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aUpdateIStreamApplyWhere(result);}
                    if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aUpdateIStreamApply(null, false);}
                    continue;

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            ExprEvaluator singleEval = factory.getOrderBy()[0].getExpr();
            for (EventBean theEvent : generatingEvents)
            {
                evalEventsPerStream[0] = theEvent;
                if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qOrderBy(evalEventsPerStream, factory.getOrderBy());}
                sortProperties[count] = singleEval.evaluate(evalEventsPerStream, isNewData, exprEvaluatorContext);
                if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aOrderBy(sortProperties[count]);}
                count++;
            }
        }
        else {

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                    widener = TypeWidenerFactory.getCheckPropertyAssignType(columnNames[i], arrayReturnType, desc.getType(), desc.getPropertyName());
                    final ExprEvaluator inner = evaluator;
                    evaluator = new ExprEvaluator() {
                        public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                        {
                            Object result = inner.evaluate(eventsPerStream, isNewData, exprEvaluatorContext);
                            if (!(result instanceof EventBean[])) {
                                return null;
                            }
                            EventBean[] events = (EventBean[]) result;
                            Object values = Array.newInstance(componentReturnType, events.length);

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                final Class returnType = columnEventType.getUnderlyingType();
                final ExprEvaluator inner = exprEvaluators[i];
                evaluators[i] = new ExprEvaluator() {
                    public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                    {
                        EventBean theEvent = (EventBean) inner.evaluate(eventsPerStream, isNewData, exprEvaluatorContext);
                        if (theEvent != null)
                        {
                            return theEvent.getUnderlying();
                        }
                        return null;

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                final ExprEvaluator inner = exprEvaluators[i];
                evaluators[i] = new ExprEvaluator() {
                    public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                    {
                        Object result = inner.evaluate(eventsPerStream, isNewData, exprEvaluatorContext);
                        if (!(result instanceof EventBean[])) {
                            return null;
                        }
                        EventBean[] events = (EventBean[]) result;
                        Object values = Array.newInstance(componentReturnType, events.length);

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            ArrayDeque<EventBean> list = new ArrayDeque<EventBean>();
            EventBean[] eventsPerStream = new EventBean[1];
            while (it.hasNext()) {
                EventBean event = it.next();
                eventsPerStream[0] = event;
                Boolean result = (Boolean) evaluator.evaluate(eventsPerStream, true, exprEvaluatorContext);
                if ((result != null) && result) {
                    list.add(event);
                }
            }
            return list;

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        if (factory.getOrderBy().length == 1) {
            ExprEvaluator singleEval = factory.getOrderBy()[0].getExpr();
            for (EventBean theEvent : generatingEvents)
            {
                evalEventsPerStream[0] = theEvent;
                sortProperties[count] = singleEval.evaluate(evalEventsPerStream, isNewData, exprEvaluatorContext);
                count++;
            }
        }
        else {
            for (EventBean theEvent : generatingEvents)

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                    widener = TypeWidenerFactory.getCheckPropertyAssignType(columnNames[i], arrayReturnType, desc.getType(), desc.getPropertyName());
                    final ExprEvaluator inner = evaluator;
                    evaluator = new ExprEvaluator() {
                        public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                        {
                            Object result = inner.evaluate(eventsPerStream, isNewData, exprEvaluatorContext);
                            if (!(result instanceof EventBean[])) {
                                return null;
                            }
                            EventBean[] events = (EventBean[]) result;
                            Object values = Array.newInstance(componentReturnType, events.length);

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