Package com.espertech.esper.epl.expression

Examples of com.espertech.esper.epl.expression.ExprEvaluator

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        Iterator<EventBean> it = parent.iterator();
        if (!it.hasNext()) {
            return Collections.EMPTY_LIST;
        }
        if (filterExpr != null) {
            ExprEvaluator evaluator = filterExpr.getExprEvaluator();
            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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        return new EventType[] {typeResult, evalEventType};
    }

    public EnumEval getEnumEval(MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, StreamTypeService streamTypeService, String statementId, String enumMethodUsedName, List<ExprDotEvalParam> bodiesAndParameters, EventType inputEventType, Class collectionComponentType, int numStreamsIncoming) {
        ExprDotEvalParam initValueParam = bodiesAndParameters.get(0);
        ExprEvaluator initValueEval = initValueParam.getBodyEvaluator();
        super.setTypeInfo(ExpressionReturnType.singleValue(JavaClassHelper.getBoxedType(initValueEval.getType())));

        ExprDotEvalParamLambda resultAndAdd = (ExprDotEvalParamLambda) bodiesAndParameters.get(1);

        if (inputEventType != null) {
            return new EnumEvalAggregateEvents(initValueEval,
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        return new EventType[0];
    }

    public EnumEval getEnumEval(MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, StreamTypeService streamTypeService, String statementId, String enumMethodUsedName, List<ExprDotEvalParam> bodiesAndParameters, EventType inputEventType, Class collectionComponentType, int numStreamsIncoming) throws ExprValidationException {
        super.setTypeInfo(ExpressionReturnType.singleValue(Boolean.class));
        ExprEvaluator body = bodiesAndParameters.get(0).getBodyEvaluator();
        return new EnumEvalSequenceEqual(body, numStreamsIncoming);
    }
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            if (index == -1) {
                throw new IllegalStateException("Could not find index property for lookup '" + indexedKeyProps[i]);
            }
            hashesDesc[i] = hashJoinedProps[index];
            hashPropCoercionTypes[i] = indexedKeyProps[i].getCoercionType();
            ExprEvaluator evaluatorHashkey = hashesDesc[i].getHashKey().getKeyExpr().getExprEvaluator();
            if (evaluatorHashkey != null && indexedKeyProps[i].getCoercionType() != evaluatorHashkey.getType()) {   // we allow null evaluator
                isCoerceHash = true;
            }
        }

        // map the order of range columns (range) to the range information available
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    public EventType[] getAddStreamTypes(String enumMethodUsedName, List<String> goesToNames, EventType inputEventType, Class collectionComponentType, List<ExprDotEvalParam> bodiesAndParameters) {
        return new EventType[] {};
    }

    public EnumEval getEnumEval(MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, StreamTypeService streamTypeService, String statementId, String enumMethodUsedName, List<ExprDotEvalParam> bodiesAndParameters, EventType inputEventType, Class collectionComponentType, int numStreamsIncoming) {
        ExprEvaluator sizeEval = bodiesAndParameters.get(0).getBodyEvaluator();
       
        if (inputEventType != null) {
            super.setTypeInfo(ExpressionReturnType.collectionOfEvents(inputEventType));
        }
        else {
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                for (int i = 0; i < typesPerStream.length; i++)
                {
                    final int streamNum = i;
                    final Class returnType = typesPerStream[streamNum].getUnderlyingType();
                   
                    expressions.add(new ExprEvaluator() {

                        public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                        {
                            EventBean theEvent = eventsPerStream[streamNum];
                            if (theEvent != null)
                            {
                                return theEvent.getUnderlying();
                            }
                            else
                            {
                                return null;
                            }
                        }

                        public Class getType()
                        {
                            return returnType;
                        }

                    });
                    types.add(returnType);
                    columnNames.add(streamNames[streamNum]);
                }
            }

            // handle stream wildcards by outputting the stream underlying event
            else if (element instanceof SelectClauseStreamCompiledSpec)
            {
                final SelectClauseStreamCompiledSpec streamSpec = (SelectClauseStreamCompiledSpec) element;
                final Class returnType = typesPerStream[streamSpec.getStreamNumber()].getUnderlyingType();

                expressions.add(new ExprEvaluator() {

                    public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
                    {
                        EventBean theEvent = eventsPerStream[streamSpec.getStreamNumber()];
                        if (theEvent != null)
                        {
                            return theEvent.getUnderlying();
                        }
                        else
                        {
                            return null;
                        }
                    }

                    public Class getType()
                    {
                        return returnType;
                    }

                });
                types.add(returnType);
                columnNames.add(streamNames[streamSpec.getStreamNumber()]);
            }

            // handle expressions
            else if (element instanceof SelectClauseExprCompiledSpec)
            {
                SelectClauseExprCompiledSpec expr = (SelectClauseExprCompiledSpec) element;
                ExprEvaluator evaluator = expr.getSelectExpression().getExprEvaluator();
                expressions.add(evaluator);
                types.add(evaluator.getType());
                if (expr.getAssignedName() != null)
                {
                    columnNames.add(expr.getAssignedName());
                }
                else
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                        actions.add(setupInsert(namedWindowName, internalEventRouter, namedWindowType, count, insertDesc, triggeringEventType, triggeringStreamName, statementContext));
                    }
                    else if (item instanceof OnTriggerMergeActionUpdate) {
                        OnTriggerMergeActionUpdate updateDesc = (OnTriggerMergeActionUpdate) item;
                        NamedWindowUpdateHelper updateHelper = NamedWindowUpdateHelper.make(namedWindowName, namedWindowType, updateDesc.getAssignments(), onTriggerDesc.getOptionalAsName());
                        ExprEvaluator filterEval = updateDesc.getOptionalWhereClause() == null ? null : updateDesc.getOptionalWhereClause().getExprEvaluator();
                        actions.add(new NamedWindowOnMergeActionUpd(filterEval, updateHelper));
                    }
                    else if (item instanceof OnTriggerMergeActionDelete) {
                        OnTriggerMergeActionDelete deleteDesc = (OnTriggerMergeActionDelete) item;
                        ExprEvaluator filterEval = deleteDesc.getOptionalWhereClause() == null ? null : deleteDesc.getOptionalWhereClause().getExprEvaluator();
                        actions.add(new NamedWindowOnMergeActionDel(filterEval));
                    }
                    else {
                        throw new IllegalArgumentException("Invalid type of merge item '" + item.getClass() + "'");
                    }
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        ExprEvaluatorContextStatement exprEvaluatorContext = new ExprEvaluatorContextStatement(statementContext);
        SelectExprProcessor insertHelper = SelectExprProcessorFactory.getProcessor(Collections.singleton(selectClauseNumber),
                selectNoWildcard.toArray(new SelectClauseElementCompiled[selectNoWildcard.size()]), false, insertIntoDesc, null, streamTypeService,
                statementContext.getEventAdapterService(), statementContext.getStatementResultService(), statementContext.getValueAddEventService(), selectExprEventTypeRegistry,
                statementContext.getMethodResolutionService(), exprEvaluatorContext, statementContext.getVariableService(), statementContext.getTimeProvider(), statementContext.getEngineURI(), statementContext.getStatementId(), statementContext.getStatementName(), statementContext.getAnnotations(), statementContext.getContextDescriptor(), statementContext.getConfigSnapshot(), null);
        ExprEvaluator filterEval = desc.getOptionalWhereClause() == null ? null : desc.getOptionalWhereClause().getExprEvaluator();

        InternalEventRouter routerToUser = streamName.equals(namedWindowName) ? null : internalEventRouter;
        boolean audit = AuditEnum.INSERT.getAudit(statementContext.getAnnotations()) != null;
        return new NamedWindowOnMergeActionIns(filterEval, insertHelper, routerToUser, statementContext.getEpStatementHandle(), statementContext.getInternalEventEngineRouteDest(), audit);
    }
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        // find the properties coming from the expressions of the select clause
        int count = written.size();
        for (int i = 0; i < selectExprContext.getExpressionNodes().length; i++) {
            String columnName = selectExprContext.getColumnNames()[i];
            ExprEvaluator evaluator = selectExprContext.getExpressionNodes()[i];
            ExprNode exprNode = exprNodes[i];

            WriteablePropertyDescriptor writable = findWritable(columnName, writables);
            if (writable == null) {
                throw new ExprValidationException("Failed to find column '" + columnName + "' in target type '" + oaResultType.getName() + "'");
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        }

        // find the properties coming from the expressions of the select clause
        for (int i = 0; i < selectExprContext.getExpressionNodes().length; i++) {
            String columnName = selectExprContext.getColumnNames()[i];
            ExprEvaluator evaluator = selectExprContext.getExpressionNodes()[i];
            ExprNode exprNode = exprNodes[i];

            WriteablePropertyDescriptor writable = findWritable(columnName, writables);
            if (writable == null) {
                throw new ExprValidationException("Failed to find column '" + columnName + "' in target type '" + mapResultType.getName() + "'");
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  • com.espertech.esper.epl.core.SelectExprInsertEventBeanFactory
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