Package com.espertech.esper.epl.expression

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

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                int toStream = substreams[i];

                if (isHistorical[toStream])
                {
                    // There may not be an outer-join descriptor, use if provided to build the associated expression
                    ExprNode outerJoinExpr = null;
                    if (!outerJoinDescList.isEmpty()) {
                        OuterJoinDesc outerJoinDesc;
                        if (toStream == 0)
                        {
                            outerJoinDesc = outerJoinDescList.get(0);
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        return raw.getStreamSpecs().get(0).getViewSpecs().get(0).getObjectParameters().get(0);
    }

    public Expression compileExpressionToSODA(String expression) throws EPException
    {
        ExprNode node = compileExpression(expression);
        return StatementSpecMapper.unmap(node);
    }
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        for (int i = 0; i < getChildNodes().size() - 1; i++) {
            if (optionalMaxExpressions.size() <= i) {
                continue;
            }
            ExprNode optionalMaxExpression = optionalMaxExpressions.get(i);
            if (optionalMaxExpression == null) {
                continue;
            }
            if (optionalMaxExpression.isConstantResult()) {
                Number result = (Number) optionalMaxExpression.getExprEvaluator().evaluate(null, true, null);
                if (result != null) {
                    cachedMaxPerChild[i] = result.intValue();
                }
            }
            else {
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        for (int i = 0; i < getChildNodes().size() - 1; i++) {
            if (optionalMaxExpressions.size() <= i) {
                continue;
            }
            ExprNode optionalMaxExpression = optionalMaxExpressions.get(i);
            if (optionalMaxExpression == null) {
                continue;
            }
            if (optionalMaxExpression.isConstantResult()) {
                Number result = (Number) optionalMaxExpression.getExprEvaluator().evaluate(null, true, null);
                if (result != null) {
                    cachedMaxPerChild[i] = result.intValue();
                }
            }
            else {
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            PatternExpressionUtil.toPrecedenceFreeEPL(writer, "->", getChildNodes(), getPrecedence());
        }
        else {
            getChildNodes().get(0).toEPL(writer, PatternExpressionPrecedenceEnum.MINIMUM);
            for (int i = 1; i < getChildNodes().size(); i++) {
                ExprNode optionalMaxExpression = null;
                if (optionalMaxExpressions.size() > (i - 1)) {
                    optionalMaxExpression = optionalMaxExpressions.get(i - 1);
                }
                if (optionalMaxExpression == null) {
                    writer.append(" -> ");
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            RowRegexExprNodeAtom atom = (RowRegexExprNodeAtom) node;

            // assign stream number for single-variables for most direct expression eval; multiple-variable gets -1
            int streamNum = variableStreams.get(atom.getTag()).getFirst();
            boolean multiple = variableStreams.get(atom.getTag()).getSecond();
            ExprNode expressionDef = variableDefinitions.get(atom.getTag());
            boolean exprRequiresMultimatch = exprRequiresMultimatchState[streamNum];

            RegexNFAStateBase nextState;
            if ((atom.getType() == RegexNFATypeEnum.ZERO_TO_MANY) || (atom.getType() == RegexNFATypeEnum.ZERO_TO_MANY_RELUCTANT))
            {
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                }

                for (int i = 0; i < keyPropertiesJoin.size(); i++)
                {
                    QueryGraphValueEntryHashKeyed keyDesc = keyPropertiesJoin.get(i);
                    ExprNode compareNode = keyDesc.getKeyExpr();

                    Class keyPropType = JavaClassHelper.getBoxedType(compareNode.getExprEvaluator().getType());
                    Class indexedPropType = JavaClassHelper.getBoxedType(allStreamTypesZeroIndexed[0].getPropertyType(indexPropertiesJoin[i]));
                    Class coercionType = indexedPropType;
                    if (keyPropType != indexedPropType)
                    {
                        coercionType = JavaClassHelper.getCompareToCoercionType(keyPropType, indexedPropType);
                    }

                    SubordPropHashKey desc;
                    if (keyPropertiesJoin.get(i) instanceof QueryGraphValueEntryHashKeyedExpr) {
                        QueryGraphValueEntryHashKeyedExpr keyExpr = (QueryGraphValueEntryHashKeyedExpr) keyPropertiesJoin.get(i);
                        Integer keyStreamNum = keyExpr.isRequiresKey() ? stream : null;
                        desc = new SubordPropHashKey(keyDesc, keyStreamNum, coercionType);
                    }
                    else {
                        QueryGraphValueEntryHashKeyedProp prop = (QueryGraphValueEntryHashKeyedProp) keyDesc;
                        desc = new SubordPropHashKey(prop, stream, coercionType);
                    }
                    joinProps.put(indexPropertiesJoin[i], desc);
                }
            }

            // handle range lookups
            QueryGraphValuePairRangeIndex rangeKeysAndIndexes = queryGraphValue.getRangeProps();
            String[] rangeIndexes = rangeKeysAndIndexes.getIndexed();
            List<QueryGraphValueEntryRange> rangeDescs = rangeKeysAndIndexes.getKeys();
            if (rangeDescs.isEmpty()) {
                continue;
            }

            // get all ranges lookups
            int count = -1;
            for (QueryGraphValueEntryRange rangeDesc : rangeDescs) {
                count++;
                String rangeIndexProp = rangeIndexes[count];

                SubordPropRangeKey subqRangeDesc = rangeProps.get(rangeIndexProp);

                // other streams may specify the start or end endpoint of a range, therefore this operation can be additive
                if (subqRangeDesc != null) {
                    if (subqRangeDesc.getRangeInfo().getType().isRange()) {
                        continue;
                    }

                    // see if we can make this additive by using a range
                    QueryGraphValueEntryRangeRelOp relOpOther = (QueryGraphValueEntryRangeRelOp) subqRangeDesc.getRangeInfo();
                    QueryGraphValueEntryRangeRelOp relOpThis = (QueryGraphValueEntryRangeRelOp) rangeDesc;

                    QueryGraphRangeConsolidateDesc opsDesc = QueryGraphRangeUtil.getCanConsolidate(relOpThis.getType(), relOpOther.getType());
                    if (opsDesc != null) {
                        ExprNode start;
                        ExprNode end;
                        if (!opsDesc.isReverse()) {
                            start = relOpOther.getExpression();
                            end = relOpThis.getExpression();
                        }
                        else {
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                    optionalReturnType, optionalReturnTypeArray, optionalDialect);
            return new Pair<ExpressionDeclItem, ExpressionScriptProvided>(null, script);
        }

        EsperEPL2GrammarParser.ExpressionDefContext ctxexpr = ctx.expressionDef();
        ExprNode inner = ASTExprHelper.exprCollectSubNodes(ctxexpr.expression(), 0, astExprNodeMap).get(0);

        List<String> parametersNames = Collections.emptyList();
        EsperEPL2GrammarParser.ExpressionLambdaDeclContext lambdactx = ctxexpr.expressionLambdaDecl();
        if (ctxexpr.expressionLambdaDecl() != null) {
            parametersNames = ASTLibFunctionHelper.getLambdaGoesParams(lambdactx);
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        }

        // next is a variable, or time period, or number
        String variableName = null;
        Double rate = null;
        ExprNode whenExpression = null;
        List<ExprNode> crontabScheduleSpec = null;
        List<OnTriggerSetAssignment> thenExpressions = null;
        ExprTimePeriod timePeriodExpr = null;
        OutputLimitRateType rateType;
        ExprNode andAfterTerminateExpr = null;
        List<OnTriggerSetAssignment> andAfterTerminateSetExpressions = null;

        if (ctx.t != null) {
            rateType = OutputLimitRateType.TERM;
            if (ctx.expression() != null) {
                andAfterTerminateExpr = ASTExprHelper.exprCollectSubNodes(ctx.expression(), 0, astExprNodeMap).get(0);
            }
            if (ctx.onSetExpr() != null) {
                andAfterTerminateSetExpressions = ASTExprHelper.getOnTriggerSetAssignments(ctx.onSetExpr().onSetAssignmentList(), astExprNodeMap);
            }
        }
        else if (ctx.wh != null) {
            rateType = OutputLimitRateType.WHEN_EXPRESSION;
            whenExpression = ASTExprHelper.exprCollectSubNodes(ctx.expression(), 0, astExprNodeMap).get(0);
            if (ctx.onSetExpr() != null) {
                thenExpressions = ASTExprHelper.getOnTriggerSetAssignments(ctx.onSetExpr().onSetAssignmentList(), astExprNodeMap);
            }
        }
        else if (ctx.at != null) {
            rateType = OutputLimitRateType.CRONTAB;
            crontabScheduleSpec = ASTExprHelper.exprCollectSubNodes(ctx.crontabLimitParameterSet(), 0, astExprNodeMap);
        }
        else {
            if (ctx.ev != null) {
                rateType = ctx.e != null ? OutputLimitRateType.EVENTS : OutputLimitRateType.TIME_PERIOD;
                if (ctx.i != null) {
                    variableName = ctx.i.getText();
                }
                else if (ctx.timePeriod() != null){
                    timePeriodExpr = (ExprTimePeriod) ASTExprHelper.exprCollectSubNodes(ctx.timePeriod(), 0, astExprNodeMap).get(0);
                }
                else {
                    ASTExprHelper.exprCollectSubNodes(ctx.number(), 0, astExprNodeMap);  // remove
                    rate = Double.parseDouble(ctx.number().getText());
                }
            }
            else {
                rateType = OutputLimitRateType.AFTER;
            }
        }

        // get the AFTER time period
        ExprTimePeriod afterTimePeriodExpr = null;
        Integer afterNumberOfEvents = null;
        if (ctx.outputLimitAfter() != null) {
            if (ctx.outputLimitAfter().timePeriod() != null) {
                ExprNode expression = ASTExprHelper.exprCollectSubNodes(ctx.outputLimitAfter(), 0, astExprNodeMap).get(0);
                afterTimePeriodExpr = (ExprTimePeriod) expression;
            }
            else {
                Object constant = ASTConstantHelper.parse(ctx.outputLimitAfter().number());
                afterNumberOfEvents = ((Number) constant).intValue();
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        }

        QueryGraphValueEntryRangeRelOp relOp = (QueryGraphValueEntryRangeRelOp) existing.getEntry();
        QueryGraphRangeConsolidateDesc opsDesc = QueryGraphRangeUtil.getCanConsolidate(op, relOp.getType());
        if (opsDesc != null) {
            ExprNode start = !opsDesc.isReverse() ? relOp.getExpression() : propertyKey;
            ExprNode end = !opsDesc.isReverse() ?  propertyKey : relOp.getExpression();
            items.remove(existing);
            addRange(opsDesc.getType(), start, end, propertyValueIdent);
        }
    }
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Related Classes of com.espertech.esper.epl.expression.ExprNode

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  • com.espertech.esper.core.start.EPPreparedExecuteSingleStreamUpdate
  • com.espertech.esper.core.start.EPStatementStartMethodCreateVariable
  • com.espertech.esper.dataflow.ops.Filter
  • com.espertech.esper.epl.agg.rollup.GroupByExpressionHelper
  • com.espertech.esper.epl.core.ColumnNamedNodeSwapper
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