org.apache.flink.runtime.executiongraph

Class ExecutionGroupVertexIterator

java.lang.Object

org.apache.flink.runtime.executiongraph.ExecutionGroupVertexIterator

All Implemented Interfaces:

Iterator<ExecutionGroupVertex>

public class ExecutionGroupVertexIterator
extends Object
implements Iterator<ExecutionGroupVertex>

This class provides an implementation of the Iterator interface which allows to traverse an execution graph and visit every reachable group vertex exactly once. The order in which the group vertices are visited corresponds to the order of their discovery in a depth first search.

This class is not thread-safe.

Constructor Summary

Constructors

Constructor and Description
ExecutionGroupVertexIterator(ExecutionGraph executionGraph, boolean forward, int stage) Creates a new execution group vertex iterator.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
ExecutionGroupVertex	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutionGroupVertexIterator

public ExecutionGroupVertexIterator(ExecutionGraph executionGraph,
                            boolean forward,
                            int stage)

Creates a new execution group vertex iterator.

Parameters:

executionGraph - the execution graph that should be traversed

forward - true if the graph should be traversed in correct order, false to reverse it in reverse order

stage - the number of the stage whose vertices should be traversed or -1 if all stages should be included in the traversal

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<ExecutionGroupVertex>

next

public ExecutionGroupVertex next()

Specified by:

next in interface Iterator<ExecutionGroupVertex>

remove

public void remove()

Specified by:

remove in interface Iterator<ExecutionGroupVertex>