Examples of com.espertech.esper.pattern.EvalNode

com.espertech.esper.pattern.EvalNode
Superclass of all nodes in an evaluation tree representing an event pattern expression. Follows the Composite pattern. Child nodes do not carry references to parent nodes, the tree is unidirectional.


    private void leaveEveryDistinct(Tree node)
    {
        log.debug(".leaveEveryDistinct");
        List<ExprNode> exprNodes = getExprNodes(node.getChild(0), 0);
        EvalNode everyNode = this.patternNodeFactory.makeEveryDistinctNode(exprNodes);
        addEvalNodeExpression(everyNode, node);
    }

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        List<ExprNode> exprNodes = getExprNodes(node, count);


        FilterSpecRaw rawFilterSpec = new FilterSpecRaw(eventName, exprNodes, propertyEvalSpec);
        propertyEvalSpec = null;
        EvalNode filterNode = patternNodeFactory.makeFilterNode(rawFilterSpec, optionalPatternTagName, consumption);
        addEvalNodeExpression(filterNode, node);
    }

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                }
                childNodes.add(astPatternNodeMap.remove(child.getChild(current)));
            }
        }
        List<ExprNode> expressions = Arrays.asList(maxExpressions); // can contain null elements as max/no-max can be mixed
        EvalNode fbNode = patternNodeFactory.makeFollowedByNode(expressions);
        fbNode.addChildNodes(childNodes);
        addEvalNodeExpression(fbNode, node);
    }

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    }


    private void leaveAnd(Tree node)
    {
        log.debug(".leaveAnd");
        EvalNode andNode = patternNodeFactory.makeAndNode();
        addEvalNodeExpression(andNode, node);
    }

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    }


    private void leaveOr(Tree node)
    {
        log.debug(".leaveOr");
        EvalNode orNode = patternNodeFactory.makeOrNode();
        addEvalNodeExpression(orNode, node);
    }

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    }


    private void leavePatternNot(Tree node)
    {
        log.debug(".leavePatternNot");
        EvalNode notNode = this.patternNodeFactory.makeNotNode();
        addEvalNodeExpression(notNode, node);
    }

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            objectName = GuardEnum.WHILE_GUARD.getName();
            obsParameters = getExprNodes(node, 1);
        }


        PatternGuardSpec guardSpec = new PatternGuardSpec(objectNamespace, objectName, obsParameters);
        EvalNode guardNode = patternNodeFactory.makeGuardNode(guardSpec);
        addEvalNodeExpression(guardNode, node);
    }

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        String objectNamespace = node.getChild(0).getText();
        String objectName = node.getChild(1).getText();
        List<ExprNode> obsParameters = getExprNodes(node, 2);


        PatternObserverSpec observerSpec = new PatternObserverSpec(objectNamespace, objectName, obsParameters);
        EvalNode observerNode = this.patternNodeFactory.makeObserverNode(observerSpec);
        addEvalNodeExpression(observerNode, node);
    }

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        if ((node.getChildCount() == 2) && (hasRange) && (!tightlyBound))
        {
            throw new ASTWalkException("Variable bounds repeat operator requires an until-expression");
        }


        EvalNode fbNode = this.patternNodeFactory.makeMatchUntilNode(low, high);
        addEvalNodeExpression(fbNode, node);
    }

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        return StatementSpecMapper.unmap(node);
    }


    public PatternExpr compilePatternToSODA(String expression) throws EPException
    {
        EvalNode node = compilePatternToNode(expression);
        return StatementSpecMapper.unmap(node);
    }

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Related Classes of com.espertech.esper.pattern.EvalNode

com.espertech.esper.core.EPAdministratorImpl

com.espertech.esper.epl.parse.EPLTreeWalker

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