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.

                    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 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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            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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        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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        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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        {
            InternalEventRouterEntry entry = entries[i];
            ExprEvaluator whereClause = entry.getOptionalWhereClause();
            if (whereClause != null)
            {
                Boolean result = (Boolean) whereClause.evaluate(eventsPerStream, true, exprEvaluatorContext);
                if ((result == null) || (!result))
                {
                    continue;
                }
            }

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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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                    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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                    ExprEvaluator filter = statementSpec.getCreateWindowDesc().getInsertFilter().getExprEvaluator();
                    for (Iterator<EventBean> it = sourceWindowInstances.getTailViewInstance().iterator(); it.hasNext();)
                    {
                        EventBean candidate = it.next();
                        eventsPerStream[0] = candidate;
                        Boolean result = (Boolean) filter.evaluate(eventsPerStream, true, agentInstanceContext);
                        if ((result == null) || (!result))
                        {
                            continue;
                        }
                        events.add(candidate);

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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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