structure
Class GraphMatrixDirected

java.lang.Object
  structure.AbstractStructure
      structure.GraphMatrix
          structure.GraphMatrixDirected

All Implemented Interfaces:

Graph, Structure

public class GraphMatrixDirected
extends GraphMatrix

A class implementing a directed, adjacency-matrix based graph. User must commit to upper-bound on number of vertices.

See Also:

GraphMatrix, GraphMatrixUndirected, GraphListDirected

Constructor Summary

GraphMatrixDirected(int size)
Construct a directed, adjacency-matrix based graph.

Method Summary

void	addEdge(Object vLabel1, Object vLabel2, Object label) Add an edge between two vertices within the graph.
int	edgeCount() Determine the number of edges in graph.
Iterator	edges() Construct an traversal over all edges.
Object	removeEdge(Object vLabel1, Object vLabel2) Remove possible edge between vertices labeled vLabel1 and vLabel2.
String	toString() Construct a string representation of graph.

Methods inherited from class structure.GraphMatrix

add, clear, contains, containsEdge, degree, get, getEdge, isDirected, isEmpty, isVisited, isVisitedEdge, iterator, neighbors, remove, reset, size, visit, visitEdge

Methods inherited from class structure.AbstractStructure

elements, hashCode, values

Methods inherited from class java.lang.Object

equals, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface structure.Structure

elements, values

Constructor Detail

GraphMatrixDirected

public GraphMatrixDirected(int size)

Construct a directed, adjacency-matrix based graph.

Parameters:

size - The maximum number of vertices allowed in graph.

Method Detail

addEdge

public void addEdge(Object vLabel1,
                    Object vLabel2,
                    Object label)

Add an edge between two vertices within the graph. Edge is directed. Duplicate edges are silently replaced. Labels on edges may be null.

Specified by:

addEdge in interface Graph

Specified by:

addEdge in class GraphMatrix

Parameters:

vLabel1 - Source vertex.

vLabel2 - Destination vertex.

label - Label associated with the edge.

removeEdge

public Object removeEdge(Object vLabel1,
                         Object vLabel2)

Remove possible edge between vertices labeled vLabel1 and vLabel2. vLabel1 is the source.

Specified by:

removeEdge in interface Graph

Specified by:

removeEdge in class GraphMatrix

Parameters:

vLabel1 - Source vertex.

vLabel2 - Destination vertex.

Returns:

The label associated with the edge removed.

edgeCount

public int edgeCount()

Determine the number of edges in graph.

Specified by:

edgeCount in interface Graph

Specified by:

edgeCount in class GraphMatrix

Returns:

Number of edges in graph.

edges

public Iterator edges()

Construct an traversal over all edges. edge is considered exactly once. Order is not guaranteed.

Specified by:

edges in interface Graph

Specified by:

edges in class GraphMatrix

Returns:

AbstractIterator over edges.

toString

public String toString()

Construct a string representation of graph.

Overrides:

toString in class Object

Returns:

String representing graph.