org.geotools.graph.traverse.basic
Class CountingWalker

java.lang.Object
  org.geotools.graph.traverse.basic.CountingWalker

All Implemented Interfaces:

GraphWalker

public class CountingWalker

extends java.lang.Object

implements GraphWalker

An implementation of GraphWalker that counts the number of components visited. As each component is visited, the walker sets the count of the component to the value of its counter.

Author:

Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net

See Also:

Graphable.setCount(int)

Constructor Summary

CountingWalker()

Method Summary

void	finish() Does nothing.
int	getCount() Returns the value of the visitation counter.
int	visit(Graphable element, GraphTraversal traversal) Sets the count of the component and increments the counter.

Methods inherited from class java.lang.Object

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

Constructor Detail

CountingWalker

public CountingWalker()

Method Detail

visit

public int visit(Graphable element,
                 GraphTraversal traversal)

Sets the count of the component and increments the counter.

Specified by:

visit in interface GraphWalker

Parameters:

element - The component being visited.

traversal - The traversal controlling the sequence of graph component visits.

Returns:

GraphTraversal#CONTINUE to signal that the traversal should continue.
GraphTraversal#CONTINUE to signal that the traversal should suspend.
GraphTraversal#KILL_BRANCH to signal that the traversal should kill its current branch.
GraphTraversal#STOP to signal that the traversal should stop.

See Also:

Graphable.setCount(int), GraphWalker.visit(Graphable, GraphTraversal)

finish

public void finish()

Does nothing.

Specified by:

finish in interface GraphWalker

See Also:

GraphWalker.finish()

getCount

public int getCount()

Returns the value of the visitation counter.

Returns:

int Value of the counter.