com.espertech.esper.epl.expression.visitor

Class ExprNodeSubselectDeclaredNoTraverseVisitor

java.lang.Object

com.espertech.esper.epl.expression.visitor.ExprNodeSubselectDeclaredNoTraverseVisitor

All Implemented Interfaces:

ExprNodeVisitorWithParent

public class ExprNodeSubselectDeclaredNoTraverseVisitor
extends Object
implements ExprNodeVisitorWithParent

Visitor that collects ExprSubselectNode instances only directly under alias expressions, and declared expressions, stopping at nested declared expressions.

Constructor Summary

Constructors

Constructor and Description
ExprNodeSubselectDeclaredNoTraverseVisitor(ExprDeclaredNode declaration) Ctor.

Method Summary

Modifier and Type	Method and Description
List<ExprSubselectNode>	getSubselects() Returns a list of lookup expression nodes.
boolean	isVisit(ExprNode exprNode) Allows visitor to indicate whether to visit a given node.
void	reset()
void	visit(ExprNode exprNode, ExprNode parentExprNode) 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

ExprNodeSubselectDeclaredNoTraverseVisitor

public ExprNodeSubselectDeclaredNoTraverseVisitor(ExprDeclaredNode declaration)

Ctor.

Parameters:

declaration - declare node

Method Detail

reset

public void reset()

getSubselects

public List<ExprSubselectNode> getSubselects()

Returns a list of lookup expression nodes.

Returns:

lookup nodes

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

visit

public void visit(ExprNode exprNode,
                  ExprNode parentExprNode)

Description copied from interface: ExprNodeVisitorWithParent

Visit the given expression node.

Specified by:

visit in interface ExprNodeVisitorWithParent

Parameters:

exprNode - is the expression node to visit

parentExprNode - parent to visit