nz.ac.waikato.jdsl.graph.api
Class Edge.NONEEdge

java.lang.Object
  nz.ac.waikato.jdsl.graph.api.Edge.NONEEdge

All Implemented Interfaces:

Accessor, Decorable, Position, Edge

Enclosing interface:

Edge

public static final class Edge.NONEEdge
extends java.lang.Object
implements Edge

A dummy class, used to implement the constant Edge.NONE
. Not intended for reuse in any way.

Nested Class Summary

Nested classes/interfaces inherited from interface nz.ac.waikato.jdsl.graph.api.Edge

Edge.NONEEdge

Field Summary

Fields inherited from interface nz.ac.waikato.jdsl.graph.api.Edge

NONE

Method Summary

ObjectIterator	attributes() Returns an iterator over all the attributes attached to this decorable.
java.lang.Object	destroy(java.lang.Object key) Removes the (attribute, value) entry associated with a certain attribute, attr, from the decorable object.
java.lang.Object	element() Gets the element currently associated with this accessor.
java.lang.Object	get(java.lang.Object key) Returns the value in the (attribute, value) entry associated with a certain attribute, attr, in this decorable object.
boolean	has(java.lang.Object key) Tests whether there is an (attribute, value) entry associated with a certain attribute in this decorable object.
void	set(java.lang.Object key, java.lang.Object value) Sets the value in the (attribute, value) entry associated with a certain attribute in this decorable object.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

element

public java.lang.Object element()
                         throws InvalidAccessorException

Description copied from interface: Accessor

Gets the element currently associated with this accessor.

Specified by:

element in interface Accessor

Returns:

the element currently stored at this accessor

Throws:

InvalidAccessorException

set

public void set(java.lang.Object key,
                java.lang.Object value)
         throws InvalidAccessorException

Description copied from interface: Decorable

Sets the value in the (attribute, value) entry associated with a certain attribute in this decorable object. Creates the attribute if it does not already exist in this decorable object.

Specified by:

set in interface Decorable

Parameters:

key - The attribute to set (and create if necessary)

value - the new value of the attribute in the decorable object

Throws:

InvalidAccessorException

get

public java.lang.Object get(java.lang.Object key)
                     throws InvalidAccessorException

Description copied from interface: Decorable

Returns the value in the (attribute, value) entry associated with a certain attribute, attr, in this decorable object.

Specified by:

get in interface Decorable

Parameters:

key - The attribute of which to attempt to get the value

Returns:

The value associated with attribute

Throws:

InvalidAccessorException

destroy

public java.lang.Object destroy(java.lang.Object key)
                         throws InvalidAccessorException

Description copied from interface: Decorable

Removes the (attribute, value) entry associated with a certain attribute, attr, from the decorable object.

Specified by:

destroy in interface Decorable

Parameters:

key - The attribute to destroy (eliminate)

Returns:

the value associated with destroyed attribute

Throws:

InvalidAccessorException

has

public boolean has(java.lang.Object key)
            throws InvalidAccessorException

Description copied from interface: Decorable

Tests whether there is an (attribute, value) entry associated with a certain attribute in this decorable object.

Specified by:

has in interface Decorable

Parameters:

key - The attribute for which to check this decorable object

Throws:

InvalidAccessorException

attributes

public ObjectIterator attributes()
                          throws InvalidAccessorException

Description copied from interface: Decorable

Returns an iterator over all the attributes attached to this decorable.

Specified by:

attributes in interface Decorable

Returns:

an ObjectIterator over all the attributes attached to this decorable

Throws:

InvalidAccessorException