Package com.espertech.esper.epl.expression

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

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
    public static ExprNodeSubselectVisitor walkSubselectAndDeclaredDotExpr(StatementSpecRaw spec) throws ExprValidationException {

        // Look for expressions with sub-selects in select expression list and filter expression
        // Recursively compile the statement within the statement.
        ExprNodeSubselectVisitor visitor = new ExprNodeSubselectVisitor();
        for (SelectClauseElementRaw raw : spec.getSelectClauseSpec().getSelectExprList())
        {
            if (raw instanceof SelectClauseExprRawSpec)
            {
                SelectClauseExprRawSpec rawExpr = (SelectClauseExprRawSpec) raw;
                rawExpr.getSelectExpression().accept(visitor);
            }
            else
            {
                continue;
            }
        }
        if (spec.getFilterRootNode() != null)
        {
            spec.getFilterRootNode().accept(visitor);
        }
        if (spec.getUpdateDesc() != null)
        {
            if (spec.getUpdateDesc().getOptionalWhereClause() != null)
            {
                spec.getUpdateDesc().getOptionalWhereClause().accept(visitor);
            }
            for (OnTriggerSetAssignment assignment : spec.getUpdateDesc().getAssignments())
            {
                assignment.getExpression().accept(visitor);
            }
        }
        if (spec.getOnTriggerDesc() != null) {
            visitSubselectOnTrigger(spec.getOnTriggerDesc(), visitor);
        }
        // Determine pattern-filter subqueries
        for (StreamSpecRaw streamSpecRaw : spec.getStreamSpecs()) {
            if (streamSpecRaw instanceof PatternStreamSpecRaw) {
                PatternStreamSpecRaw patternStreamSpecRaw = (PatternStreamSpecRaw) streamSpecRaw;
                EvalNodeAnalysisResult analysisResult = EvalNodeUtil.recursiveAnalyzeChildNodes(patternStreamSpecRaw.getEvalFactoryNode());
                for (EvalFactoryNode evalNode : analysisResult.getActiveNodes()) {
                    if (evalNode instanceof EvalFilterFactoryNode) {
                        EvalFilterFactoryNode filterNode = (EvalFilterFactoryNode) evalNode;
                        for (ExprNode filterExpr : filterNode.getRawFilterSpec().getFilterExpressions()) {
                            filterExpr.accept(visitor);
                        }
                    }
                    else if (evalNode instanceof EvalObserverFactoryNode) {
                        int beforeCount = visitor.getSubselects().size();
                        EvalObserverFactoryNode observerNode = (EvalObserverFactoryNode) evalNode;
                        for (ExprNode param : observerNode.getPatternObserverSpec().getObjectParameters()) {
                            param.accept(visitor);
                        }
                        if (visitor.getSubselects().size() != beforeCount) {
                            throw new ExprValidationException("Subselects are not allowed within pattern observer parameters, please consider using a variable instead");
                        }
                    }
                }
            }
View Full Code Here
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
    public static ExprNodeSubselectVisitor walkSubselectAndDeclaredDotExpr(StatementSpecRaw spec) throws ExprValidationException {

        // Look for expressions with sub-selects in select expression list and filter expression
        // Recursively compile the statement within the statement.
        ExprNodeSubselectVisitor visitor = new ExprNodeSubselectVisitor();
        for (SelectClauseElementRaw raw : spec.getSelectClauseSpec().getSelectExprList())
        {
            if (raw instanceof SelectClauseExprRawSpec)
            {
                SelectClauseExprRawSpec rawExpr = (SelectClauseExprRawSpec) raw;
                rawExpr.getSelectExpression().accept(visitor);
            }
            else
            {
                continue;
            }
        }
        if (spec.getFilterRootNode() != null)
        {
            spec.getFilterRootNode().accept(visitor);
        }
        if (spec.getUpdateDesc() != null)
        {
            if (spec.getUpdateDesc().getOptionalWhereClause() != null)
            {
                spec.getUpdateDesc().getOptionalWhereClause().accept(visitor);
            }
            for (OnTriggerSetAssignment assignment : spec.getUpdateDesc().getAssignments())
            {
                assignment.getExpression().accept(visitor);
            }
        }
        if (spec.getOnTriggerDesc() != null) {
            visitSubselectOnTrigger(spec.getOnTriggerDesc(), visitor);
        }
        // Determine pattern-filter subqueries
        for (StreamSpecRaw streamSpecRaw : spec.getStreamSpecs()) {
            if (streamSpecRaw instanceof PatternStreamSpecRaw) {
                PatternStreamSpecRaw patternStreamSpecRaw = (PatternStreamSpecRaw) streamSpecRaw;
                EvalNodeAnalysisResult analysisResult = EvalNodeUtil.recursiveAnalyzeChildNodes(patternStreamSpecRaw.getEvalNode());
                for (EvalNode evalNode : analysisResult.getActiveNodes()) {
                    if (evalNode instanceof EvalFilterNode) {
                        EvalFilterNode filterNode = (EvalFilterNode) evalNode;
                        for (ExprNode filterExpr : filterNode.getRawFilterSpec().getFilterExpressions()) {
                            filterExpr.accept(visitor);
                        }
                    }
                    else if (evalNode instanceof EvalObserverNode) {
                        int beforeCount = visitor.getSubselects().size();
                        EvalObserverNode observerNode = (EvalObserverNode) evalNode;
                        for (ExprNode param : observerNode.getPatternObserverSpec().getObjectParameters()) {
                            param.accept(visitor);
                        }
                        if (visitor.getSubselects().size() != beforeCount) {
                            throw new ExprValidationException("Subselects are not allowed within pattern observer parameters, please consider using a variable instead");
                        }
                    }
                }
            }
View Full Code Here
TOP

Related Classes of com.espertech.esper.epl.expression.ExprNodeSubselectVisitor

  • com.espertech.esper.core.service.StatementLifecycleSvcUtil
  • com.espertech.esper.core.StatementLifecycleSvcUtil
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.