Package com.espertech.esper.common.internal.epl.expression.visitor

Class ExprNodeViewResourceVisitor

java.lang.Object

com.espertech.esper.common.internal.epl.expression.visitor.ExprNodeViewResourceVisitor

All Implemented Interfaces:

ExprNodeVisitor

public class ExprNodeViewResourceVisitor
extends Object
implements ExprNodeVisitor

Visitor that collects expression nodes that require view resources.

Constructor Summary

Constructors

Constructor	Description
ExprNodeViewResourceVisitor()	Ctor.

Method Summary

Modifier and Type	Method	Description
List<ExprNode>	getExprNodes()	Returns the list of expression nodes requiring view resources.
boolean	isVisit(ExprNode exprNode)	Allows visitor to indicate whether to visit a given node.
void	visit(ExprNode exprNode)	Visit the given expression node.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.common.internal.epl.expression.visitor.ExprNodeVisitor

isWalkDeclExprParam

Constructor Details

ExprNodeViewResourceVisitor

public ExprNodeViewResourceVisitor()

Ctor.

Method Details

isVisit

public boolean isVisit(ExprNode exprNode)

Description copied from interface: ExprNodeVisitor

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 ExprNodeVisitor

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

getExprNodes

public List<ExprNode> getExprNodes()

Returns the list of expression nodes requiring view resources.

Returns:

expr nodes such as 'prior' or 'prev'

visit

public void visit(ExprNode exprNode)

Description copied from interface: ExprNodeVisitor

Visit the given expression node.

Specified by:

visit in interface ExprNodeVisitor

Parameters:

exprNode - is the expression node to visit