org.apache.flink.util

Interface Visitor<T extends Visitable<T>>

All Known Implementing Classes:

BinaryUnionReplacer, BranchesVisitor, GraphCreatingVisitor, IdAndEstimatesVisitor, InterestingPropertyVisitor, JobGraphGenerator, PlanFinalizer, RangePartitionRewriter, StaticDynamicPathIdentifier, StepFunctionValidator

@Internal
public interface Visitor<T extends Visitable<T>>

A visitor encapsulates functionality that is applied to each node in the process of a traversal of a tree or DAD.

Method Summary

Modifier and Type	Method and Description
void	postVisit(T visitable)
boolean	preVisit(T visitable)

Method Detail

preVisit

boolean preVisit(T visitable)

Parameters:

visitable -

Returns:

True, if the traversal should continue, false otherwise.

postVisit

void postVisit(T visitable)

Parameters:

visitable -