public class SingletonTraverser extends Object implements Traverser
Traverser
over a single Edge
. remove()
and removeEdge()
delegate to Graph.removeNode( node )
and Graph.removeEdge( edge )
respectively.
An alternate
constructor
is provided to explicitly make the created
Traverser
unmodifiable.
Constructor and Description |
---|
SingletonTraverser(Graph graph,
Object endpoint,
Graph.Edge edge)
Creates a new modifiable
SingletonTraverser . |
SingletonTraverser(Object endpoint,
Graph.Edge edge)
Creates a new unmodifiable
SingletonTraverser . |
Modifier and Type | Method and Description |
---|---|
Graph.Edge |
getEdge()
Returns the
Edge which was traversed to get to
the last node returned by next() , or
null if no Edge was traversed. |
boolean |
hasNext() |
Object |
next() |
void |
remove() |
void |
removeEdge()
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
forEachRemaining
public SingletonTraverser(Object endpoint, Graph.Edge edge)
SingletonTraverser
.
If this constructor is used, remove()
and removeEdge()
will throw
UnsupportedOperationExceptions
.endpoint
- the endpoint of the edge over which the
returned Traverser
iterates.edge
- the edge over which the returned
Traverser
iterates.public SingletonTraverser(Graph graph, Object endpoint, Graph.Edge edge)
SingletonTraverser
.graph
- the graph containing the edge over which the
returned Traverser
iterates.endpoint
- the endpoint of the edge over which the
returned Traverser
iterates.edge
- the edge over which the returned
Traverser
iterates.public Graph.Edge getEdge()
Traverser
Edge
which was traversed to get to
the last node returned by next()
, or
null
if no Edge
was traversed. This
call can be made only if remove()
or removeEdge()
has not been called after the last
call to next()
.public void removeEdge()
Traverser
Graph
the
Edge
that would be returned by getEdge()
(optional operation). If no Edge
was
traversed (as in the root of a breadth-first search), this
method throws a IllegalStateException
. This
method can be called only once per call to next()
. The behavior of a traverser is unspecified if the
underlying graph structure is modified while the traversal is
in progress in any way other than by calling this method or
remove()
.removeEdge
in interface Traverser
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Copyright ? 1994-2006, by Phoenix Software Technologists, Inc. and others. All Rights Reserved. Use is subject to license terms.