salvo.jesus.graph

Class VertexImpl

java.lang.Object

salvo.jesus.graph.VertexImpl

All Implemented Interfaces:

Serializable, GraphComponent, LabeledGraphComponent, Vertex

public class VertexImpl
extends Object
implements Vertex

A vertex in a graph. This class encapsulates an object that the vertex will represent. Hence, a Vertex can represent any object that extends java.lang.Object by simply calling setObject() or specifying the objet on the constructor.

Author:

Jesus M. Salvo Jr.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	object The object that the vertex represents.

Constructor Summary

Constructors

Constructor and Description
VertexImpl() Constructor that initializes this.object to null
VertexImpl(Object newobject) Creates a new Vertex object that initializes this.object to newobject

Method Summary

Modifier and Type	Method and Description
String	getLabel() Returns the label for this vertex.
Object	getObject() Getter method that returns the object that the Vertex represents
boolean	hasLabel()
void	setLabel(String label) Set the label on this component.
void	setObject(Object newobject) Setter method sets this.object to newobject
String	toString() If setString() has never been called, this method then simply calls this.object.toString().

Methods inherited from class java.lang.Object

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

Field Detail

object

protected Object object

The object that the vertex represents.

Constructor Detail

VertexImpl

public VertexImpl()

Constructor that initializes this.object to null

VertexImpl

public VertexImpl(Object newobject)

Creates a new Vertex object that initializes this.object to newobject

Parameters:

newobject - The object that the Vertex will encapsulate

Method Detail

getObject

public Object getObject()

Getter method that returns the object that the Vertex represents

Returns:

The object that this Vertex encapsulates

setObject

public void setObject(Object newobject)

Setter method sets this.object to newobject

hasLabel

public boolean hasLabel()

Specified by:

hasLabel in interface LabeledGraphComponent

Returns:

does this component have a label? In some graphs, labeling may be optional, in which case this method may return true for some or all components.

getLabel

public String getLabel()

Returns the label for this vertex. Keep in mind that Vertex. now extend LabeledGraphComponent, so that this method really just call LabeledGraphComponent.getLabel().

Initially, when the vertex is created, the label is the the value of the toString() method of the object passed-in to the constructor. In the case of the constructor with no argument called, the label is initially "". After that, the label has no more relation to the object encapsulated by the Vertex, so that even changing the object encapsulated by the Vertex does not change the label at all.

Specified by:

getLabel in interface LabeledGraphComponent

Returns:

the label associated with this component; if hasLabel() returns false, the result of getLabel() is undefined

setLabel

public void setLabel(String label)

Description copied from interface: LabeledGraphComponent

Set the label on this component. In many cases, attempting to reassign a label after one has already been set will cause an assertion failure.

Specified by:

setLabel in interface LabeledGraphComponent

Parameters:

label - the new label to assign to the component

toString

public String toString()

If setString() has never been called, this method then simply calls this.object.toString(). Otherwise, it returns the string that was set during the call to setString().

Overrides:

toString in class Object

Returns:

String representation of the Vertex object