com.espertech.esper.epl.expression.visitor
Class ExprNodeIdentifierCollectVisitorWContainer

java.lang.Object
  com.espertech.esper.epl.expression.visitor.ExprNodeIdentifierCollectVisitorWContainer

All Implemented Interfaces:

ExprNodeVisitorWithParent

public class ExprNodeIdentifierCollectVisitorWContainer
extends java.lang.Object
implements ExprNodeVisitorWithParent

Visitor that collects event property identifier information under expression nodes.

Constructor Summary

ExprNodeIdentifierCollectVisitorWContainer()
Ctor.

Method Summary

java.util.List<Pair<ExprNode,ExprIdentNode>>	getExprProperties() Returns list of event property stream numbers and names that uniquely identify which property is from whcih stream, and the name of each.
boolean	isVisit(ExprNode exprNode) Allows visitor to indicate whether to visit a given node.
void	visit(ExprNode exprNode, ExprNode containerExprNode) Visit the given expression node.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExprNodeIdentifierCollectVisitorWContainer

public ExprNodeIdentifierCollectVisitorWContainer()

Ctor.

Method Detail

isVisit

public boolean isVisit(ExprNode exprNode)

Description copied from interface: ExprNodeVisitorWithParent

Allows visitor to indicate whether to visit a given node. Implicitly if a visitor doesn't visit a node it would also not visit any descendent child nodes of that node.

Specified by:

isVisit in interface ExprNodeVisitorWithParent

Parameters:

exprNode - is the node in questions

Returns:

true if the visitor wants to visit the child node (next call is visit), or false to skip child

getExprProperties

public java.util.List<Pair<ExprNode,ExprIdentNode>> getExprProperties()

Returns list of event property stream numbers and names that uniquely identify which property is from whcih stream, and the name of each.

Returns:

list of event property statement-unique info

visit

public void visit(ExprNode exprNode,
                  ExprNode containerExprNode)

Description copied from interface: ExprNodeVisitorWithParent

Visit the given expression node.

Specified by:

visit in interface ExprNodeVisitorWithParent

Parameters:

exprNode - is the expression node to visit

containerExprNode - parent to visit