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java.lang.Objectorg._3pq.jgrapht.traverse.AbstractGraphIterator
org._3pq.jgrapht.traverse.CrossComponentIterator
org._3pq.jgrapht.traverse.DepthFirstIterator
public class DepthFirstIterator
A depth-first iterator for a directed and an undirected graph. For this iterator to work correctly the graph must not be modified during iteration. Currently there are no means to ensure that, nor to fail-fast. The results of such modifications are undefined.
| Constructor Summary | |
|---|---|
DepthFirstIterator(Graph g)
Creates a new depth-first iterator for the specified graph. |
|
DepthFirstIterator(Graph g,
java.lang.Object startVertex)
Creates a new depth-first iterator for the specified graph. |
|
| Method Summary | |
|---|---|
protected void |
encounterVertex(java.lang.Object vertex,
Edge edge)
Update data structures the first time we see a vertex. |
protected void |
encounterVertexAgain(java.lang.Object vertex,
Edge edge)
Called whenever we re-encounter a vertex. |
protected boolean |
isConnectedComponentExhausted()
Returns true if there are no more uniterated vertices in the currently iterated connected component; false otherwise. |
protected java.lang.Object |
provideNextVertex()
Returns the vertex to be returned in the following call to the iterator next method. |
| Methods inherited from class org._3pq.jgrapht.traverse.CrossComponentIterator |
|---|
getSeenData, hasNext, isSeenVertex, next, putSeenData |
| Methods inherited from class org._3pq.jgrapht.traverse.AbstractGraphIterator |
|---|
addTraversalListener, fireConnectedComponentFinished, fireConnectedComponentStarted, fireEdgeTraversed, fireVertexTraversed, isCrossComponentTraversal, isReuseEvents, remove, removeTraversalListener, setCrossComponentTraversal, setReuseEvents |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public DepthFirstIterator(Graph g)
g - the graph to be iterated.
public DepthFirstIterator(Graph g,
java.lang.Object startVertex)
null, iteration will start at an arbitrary
vertex and will not be limited, that is, will be able to traverse all
the graph.
g - the graph to be iterated.startVertex - the vertex iteration to be started.| Method Detail |
|---|
protected boolean isConnectedComponentExhausted()
CrossComponentIterator
isConnectedComponentExhausted in class CrossComponentIteratorCrossComponentIterator.isConnectedComponentExhausted()
protected void encounterVertex(java.lang.Object vertex,
Edge edge)
CrossComponentIterator
encounterVertex in class CrossComponentIteratorvertex - the vertex encounterededge - the edge via which the vertex was encountered, or null if
the vertex is a starting pointCrossComponentIterator.encounterVertex(java.lang.Object,
org._3pq.jgrapht.Edge)
protected void encounterVertexAgain(java.lang.Object vertex,
Edge edge)
CrossComponentIterator
encounterVertexAgain in class CrossComponentIteratorvertex - the vertex re-encounterededge - the edge via which the vertex was re-encounteredCrossComponentIterator.encounterVertexAgain(java.lang.Object,
org._3pq.jgrapht.Edge)protected java.lang.Object provideNextVertex()
CrossComponentIteratornext method.
provideNextVertex in class CrossComponentIteratorCrossComponentIterator.provideNextVertex()
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