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

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

All Implemented Interfaces:

ExprNodeVisitorWithParent

public class ExprNodePreviousVisitorWParent
extends java.lang.Object
implements ExprNodeVisitorWithParent

Visitor for getting a list of "prev" functions.

Constructor Summary

ExprNodePreviousVisitorWParent()

Method Summary

java.util.List<Pair<ExprNode,ExprPreviousNode>>	getPrevious() Returns the pair of previous nodes and their parent expression.
boolean	isVisit(ExprNode exprNode) Allows visitor to indicate whether to visit a given node.
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

ExprNodePreviousVisitorWParent

public ExprNodePreviousVisitorWParent()

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

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

getPrevious

public java.util.List<Pair<ExprNode,ExprPreviousNode>> getPrevious()

Returns the pair of previous nodes and their parent expression.

Returns:

nodes