org.jaxen.util

Class SingletonList

java.lang.Object

java.util.AbstractCollection

java.util.AbstractList

org.jaxen.util.SingletonList

All Implemented Interfaces:

java.lang.Iterable, java.util.Collection, java.util.List

public class SingletonList
extends java.util.AbstractList

A utility class that implements singleton lists (to avoid dependency on JDK 1.3). Many operations including add() and remove() throw UnsupportedOperationExceptions.

Version:

1.2b12

Author:

Attila Szegedi

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Object	element

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor and Description
SingletonList(java.lang.Object element) Creates a new singleton list.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	get(int index) Returns the single element in the list.
int	size() Returns 1.

Methods inherited from class java.util.AbstractList

add, add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Field Detail

element

private final java.lang.Object element

Constructor Detail

SingletonList

public SingletonList(java.lang.Object element)

Creates a new singleton list.

Parameters:

element - the single member of the list

Method Detail

size

public int size()

Returns 1.

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.List

Specified by:

size in class java.util.AbstractCollection

Returns:

1

get

public java.lang.Object get(int index)

Returns the single element in the list.

Specified by:

get in interface java.util.List

Specified by:

get in class java.util.AbstractList

Returns:

the only element in the list

Throws:

java.lang.IndexOutOfBoundsException - if index is not 0