Examples of com.espertech.esper.pattern.EvalFactoryNode

com.espertech.esper.pattern.EvalFactoryNode
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.

            {
                throw new ASTWalkException("Unexpected AST tree contains zero or more then 1 child elements for root");
            }


            // Get expression node sub-tree from the AST nodes placed so far
            EvalFactoryNode evalNode = astPatternNodeMap.values().iterator().next();


            streamSpec = new PatternStreamSpecRaw(evalNode, evalNodeExpressions, viewSpecs, streamName, options);
            if (evalNodeExpressions != null) {
                evalNodeExpressions = new HashMap<EvalFactoryNode, String>();
            }

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    }


    private void leaveEvery(Tree node)
    {
        log.debug(".leaveEvery");
        EvalFactoryNode everyNode = this.patternNodeFactory.makeEveryNode();
        addEvalNodeExpression(everyNode, node);
    }

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

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


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

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        }
        List<ExprNode> expressions = Collections.emptyList();
        if (!CollectionUtil.isAllNullArray(maxExpressions)) {
            expressions = Arrays.asList(maxExpressions); // can contain null elements as max/no-max can be mixed
        }
        EvalFactoryNode fbNode = patternNodeFactory.makeFollowedByNode(expressions, configurationInformation.getEngineDefaults().getPatterns().getMaxSubexpressions() != null);
        fbNode.addChildNodes(childNodes);
        addEvalNodeExpression(fbNode, node);
    }

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    }


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

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    }


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

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    }


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

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


        PatternGuardSpec guardSpec = new PatternGuardSpec(objectNamespace, objectName, obsParameters);
        EvalFactoryNode 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 = ASTExprHelper.getExprNodes(node, 2, astExprNodeMap);


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

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com.espertech.esper.core.start.EPStatementStartMethodCreateContext

com.espertech.esper.epl.parse.ASTContextHelper

com.espertech.esper.epl.parse.ASTExprHelper

com.espertech.esper.epl.parse.EPLTreeWalker

com.espertech.esper.epl.parse.EPLTreeWalkerListener

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