org.jboss.util.collection

Class ListSet

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet

org.jboss.util.collection.ListSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.Set

public class ListSet
extends java.util.AbstractSet
implements java.util.Set, java.lang.Cloneable, java.io.Serializable

A thin wrapper around a List transforming it into a modifiable Set.

Version:

$Revision$

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List	list The List which will be used for element storage.
private static long	serialVersionUID The serialVersionUID

Constructor Summary

Constructors

Constructor and Description
ListSet() Construct a ListSet using an ArrayList for backing.
ListSet(java.util.Collection elements) Construct a ListSet using an ArrayList for backing and populated with the given elements.
ListSet(java.util.List list) Construct a ListSet.

Method Summary

Modifier and Type	Method and Description
boolean	add(java.lang.Object obj) Add an element to the set.
void	clear() Removes all of the elements from this set.
java.lang.Object	clone() Returns a shallow copy of this ListSet instance.
boolean	contains(java.lang.Object obj) Returns true if this set contains the specified element.
java.util.List	getList()
boolean	isEmpty() Returns true if this set contains no elements.
java.util.Iterator	iterator() Return an iteration over the elements in the set.
boolean	remove(java.lang.Object obj) Removes the given element from this set if it is present.
int	size() Return the size of the set.

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, containsAll, equals, hashCode, removeAll, retainAll, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

serialVersionUID

private static final long serialVersionUID

The serialVersionUID

See Also:

Constant Field Values

list

protected final java.util.List list

The List which will be used for element storage.

Constructor Detail

ListSet

public ListSet(java.util.List list)

Construct a ListSet.

Parameters:

list - The List which will be used for element storage.

Throws:

java.lang.IllegalArgumentException - List is null or contains duplicate entries.

ListSet

public ListSet()

Construct a ListSet using an ArrayList for backing.

ListSet

public ListSet(java.util.Collection elements)

Construct a ListSet using an ArrayList for backing and populated with the given elements.

Parameters:

elements - The elements for the list.

Method Detail

getList

public java.util.List getList()

size

public int size()

Return the size of the set.

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.Set

Specified by:

size in class java.util.AbstractCollection

Returns:

The size of the set.

iterator

public java.util.Iterator iterator()

Return an iteration over the elements in the set.

Specified by:

iterator in interface java.lang.Iterable

Specified by:

iterator in interface java.util.Collection

Specified by:

iterator in interface java.util.Set

Specified by:

iterator in class java.util.AbstractCollection

Returns:

An iteration over the elements in the set.

add

public boolean add(java.lang.Object obj)

Add an element to the set.

Specified by:

add in interface java.util.Collection

Specified by:

add in interface java.util.Set

Overrides:

add in class java.util.AbstractCollection

Parameters:

obj - Element to add to the set.

Returns:

True if the element was added.

isEmpty

public boolean isEmpty()

Returns true if this set contains no elements.

Specified by:

isEmpty in interface java.util.Collection

Specified by:

isEmpty in interface java.util.Set

Overrides:

isEmpty in class java.util.AbstractCollection

Returns:

true if this set contains no elements.

contains

public boolean contains(java.lang.Object obj)

Returns true if this set contains the specified element.

Specified by:

contains in interface java.util.Collection

Specified by:

contains in interface java.util.Set

Overrides:

contains in class java.util.AbstractCollection

Parameters:

obj - Element whose presence in this set is to be tested.

Returns:

true if this set contains the specified element.

remove

public boolean remove(java.lang.Object obj)

Removes the given element from this set if it is present.

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.Set

Overrides:

remove in class java.util.AbstractCollection

Parameters:

obj - Object to be removed from this set, if present.

Returns:

true if the set contained the specified element.

clear

public void clear()

Removes all of the elements from this set.

Specified by:

clear in interface java.util.Collection

Specified by:

clear in interface java.util.Set

Overrides:

clear in class java.util.AbstractCollection

clone

public java.lang.Object clone()

Returns a shallow copy of this ListSet instance.

Overrides:

clone in class java.lang.Object

Returns:

A shallow copy of this set.