org.jgrapht.experimental.dag

Class DirectedAcyclicGraph.VisitedArrayImpl

java.lang.Object

org.jgrapht.experimental.dag.DirectedAcyclicGraph.VisitedArrayImpl

All Implemented Interfaces:

Serializable, DirectedAcyclicGraph.Visited, DirectedAcyclicGraph.VisitedFactory

Enclosing class:

DirectedAcyclicGraph<V,E>

public static class DirectedAcyclicGraph.VisitedArrayImpl
extends Object
implements DirectedAcyclicGraph.Visited, DirectedAcyclicGraph.VisitedFactory

This implementation, somewhat to my surprise, is slower than the ArrayList version, probably due to its reallocation of the underlying array for every topology reorder that is required.

Author:

gilesp

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DirectedAcyclicGraph.VisitedArrayImpl() Constructs empty factory instance
DirectedAcyclicGraph.VisitedArrayImpl(DirectedAcyclicGraph.Region region)

Method Summary

Methods

Modifier and Type	Method and Description
void	clearVisited(int index) Clear the visited state of the given topological index
DirectedAcyclicGraph.Visited	getInstance(DirectedAcyclicGraph.Region affectedRegion)
boolean	getVisited(int index) has the given topological index been visited?
void	setVisited(int index) mark the given topological index as visited

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectedAcyclicGraph.VisitedArrayImpl

public DirectedAcyclicGraph.VisitedArrayImpl()

Constructs empty factory instance

DirectedAcyclicGraph.VisitedArrayImpl

public DirectedAcyclicGraph.VisitedArrayImpl(DirectedAcyclicGraph.Region region)

Method Detail

getInstance

public DirectedAcyclicGraph.Visited getInstance(DirectedAcyclicGraph.Region affectedRegion)

Specified by:

getInstance in interface DirectedAcyclicGraph.VisitedFactory

setVisited

public void setVisited(int index)

Description copied from interface: DirectedAcyclicGraph.Visited

mark the given topological index as visited

Specified by:

setVisited in interface DirectedAcyclicGraph.Visited

Parameters:

index - the topological index

getVisited

public boolean getVisited(int index)

Description copied from interface: DirectedAcyclicGraph.Visited

has the given topological index been visited?

Specified by:

getVisited in interface DirectedAcyclicGraph.Visited

Parameters:

index - the topological index

clearVisited

public void clearVisited(int index)
                  throws UnsupportedOperationException

Description copied from interface: DirectedAcyclicGraph.Visited

Clear the visited state of the given topological index

Specified by:

clearVisited in interface DirectedAcyclicGraph.Visited

Throws:

UnsupportedOperationException - if the implementation doesn't support (or doesn't need) clearance. For example, if the factory vends a new instance every time, it is a waste of cycles to clear the state after the search of the Affected Region is done, so an UnsupportedOperationException *should* be thrown.