diva.graph.basic
Class BasicGraphModel.BasicEdge

java.lang.Object
  diva.util.BasicPropertyContainer
      diva.graph.basic.BasicGraphModel.Intermediate
          diva.graph.basic.BasicGraphModel.BasicEdge

All Implemented Interfaces:

Edge, PropertyContainer, SemanticObjectContainer

Enclosing class:

BasicGraphModel

private static class BasicGraphModel.BasicEdge
extends BasicGraphModel.Intermediate
implements Edge

A basic implementation of the Edge interface.

Field Summary

private boolean	_directed Whether or not this edge is directed.
private Node	_head The head of the edge.
private Node	_tail The tail of the edge.

Constructor Summary

BasicGraphModel.BasicEdge(java.lang.Object userObject)
Create a new edge with the specified user object but no tail or head.

BasicGraphModel.BasicEdge(java.lang.Object userObject, Node tail, Node head)
Create a new edge with the specified user object and tail/head

Method Summary

boolean	acceptHead(Node head) Return whether or not the given node is a valid head of this edge.
boolean	acceptTail(Node tail) Return whether or not the given node is a valid tail of this edge.
Node	getHead() Return the node at the head of this edge.
Node	getTail() Return the node at the tail of this edge.
boolean	isDirected() Return whether or not this edge is directed.
void	setHead(Node n) Set the node that this edge points to.
void	setTail(Node n) Set the node that this edge stems from.
java.lang.String	toString() Print a readable description of this edge

Methods inherited from class diva.graph.basic.BasicGraphModel.Intermediate

getSemanticObject, setSemanticObject

Methods inherited from class diva.util.BasicPropertyContainer

getProperty, properties, propertyNames, removeAllProperties, setProperty

Methods inherited from class java.lang.Object

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

Methods inherited from interface diva.util.SemanticObjectContainer

getSemanticObject, setSemanticObject

Methods inherited from interface diva.util.PropertyContainer

getProperty, propertyNames, setProperty

Field Detail

_directed

private boolean _directed

Whether or not this edge is directed.

_head

private Node _head

The head of the edge.

_tail

private Node _tail

The tail of the edge.

Constructor Detail

BasicGraphModel.BasicEdge

public BasicGraphModel.BasicEdge(java.lang.Object userObject)

Create a new edge with the specified user object but no tail or head.

BasicGraphModel.BasicEdge

public BasicGraphModel.BasicEdge(java.lang.Object userObject,
                                 Node tail,
                                 Node head)

Create a new edge with the specified user object and tail/head

Method Detail

acceptHead

public boolean acceptHead(Node head)

Description copied from interface: Edge

Return whether or not the given node is a valid head of this edge.

Specified by:

acceptHead in interface Edge

acceptTail

public boolean acceptTail(Node tail)

Description copied from interface: Edge

Return whether or not the given node is a valid tail of this edge.

Specified by:

acceptTail in interface Edge

getHead

public Node getHead()

Description copied from interface: Edge

Return the node at the head of this edge.

Specified by:

getHead in interface Edge

getTail

public Node getTail()

Description copied from interface: Edge

Return the node at the tail of this edge.

Specified by:

getTail in interface Edge

isDirected

public boolean isDirected()

Description copied from interface: Edge

Return whether or not this edge is directed.

Specified by:

isDirected in interface Edge

setHead

public void setHead(Node n)

Description copied from interface: Edge

Set the node that this edge points to. Implementors of this method are also responsible for insuring that it is set properly as an "incoming" edge of the node, and that it is removed as an incoming edge from its previous head node.

Specified by:

setHead in interface Edge

setTail

public void setTail(Node n)

Description copied from interface: Edge

Set the node that this edge stems from. Implementors of this method are also responsible for insuring that it is set properly as an "outgoing" edge of the node, and that it is removed as an outgoing edge from its previous tail node.

Specified by:

setTail in interface Edge

toString

public java.lang.String toString()

Print a readable description of this edge

Overrides:

toString in class java.lang.Object