org.apache.commons.cache.adt
Class WListableBase

java.lang.Object
  org.apache.commons.cache.adt.ListableBase
      org.apache.commons.cache.adt.WListableBase

All Implemented Interfaces:

Cloneable, Listable

Direct Known Subclasses:

WListableObject

public class WListableBase
extends ListableBase
implements Listable, Cloneable

An base implementation of Listable, supporting doubly-linked lists.

Version:

$Id: WListableBase.java 155435 2005-02-26 13:17:27Z dirkv $

Author:

Rodney Waldhoff

Field Summary

protected Listable

_prev My preceeding sibling.

Fields inherited from class org.apache.commons.cache.adt.ListableBase

_next

Constructor Summary

WListableBase()
No arg constructor.

WListableBase(Listable prev, Listable next)
Constructor.

Method Summary

Listable	getPrev() Throws UnsupportedOperationException.
boolean	hasPrev() Throws UnsupportedOperationException.
void	setPrev(Listable prev) Throws UnsupportedOperationException.

Methods inherited from class org.apache.commons.cache.adt.ListableBase

getNext, hasNext, setNext

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.cache.adt.Listable

getNext, hasNext, setNext

Field Detail

_prev

protected transient Listable _prev

My preceeding sibling.

Constructor Detail

WListableBase

public WListableBase()

No arg constructor. Equivalent to WListableBase(null,null).

WListableBase

public WListableBase(Listable prev,
                     Listable next)

Constructor.

Parameters:

prev - the prev element in the list.

next - the next element in the list.

Method Detail

getPrev

public Listable getPrev()

Description copied from class: ListableBase

Throws UnsupportedOperationException.

Specified by:

getPrev in interface Listable

Overrides:

getPrev in class ListableBase

Returns:

the Listable element preceeding me, or null.

hasPrev

public boolean hasPrev()

Description copied from class: ListableBase

Throws UnsupportedOperationException.

Specified by:

hasPrev in interface Listable

Overrides:

hasPrev in class ListableBase

Returns:

true if there is a Listable element preceeding me, false otherwise.

setPrev

public void setPrev(Listable prev)

Description copied from class: ListableBase

Throws UnsupportedOperationException.

Specified by:

setPrev in interface Listable

Overrides:

setPrev in class ListableBase

Parameters:

prev - my new preceeding sibling.