org.apache.pivot.collections.immutable
Class ImmutableSet<E>

java.lang.Object
  extended by org.apache.pivot.collections.immutable.ImmutableSet<E>
All Implemented Interfaces:
Iterable<E>, Collection<E>, Group<E>, Set<E>

public class ImmutableSet<E>
extends Object
implements Set<E>

Unmodifiable implementation of the Set interface.


Nested Class Summary
 
Nested classes/interfaces inherited from interface org.apache.pivot.collections.Set
Set.SetListenerList<E>
 
Constructor Summary
ImmutableSet(Set<E> set)
           
 
Method Summary
 boolean add(E element)
          Adds an element to the group.
 void clear()
          Removes all elements from the collection.
 boolean contains(E element)
          Tests the existence of an element in the group.
 Comparator<E> getComparator()
          Returns the collection's sort order.
 int getCount()
          Returns the number of elements in the set.
 ListenerList<SetListener<E>> getSetListeners()
          Returns the set listener collection.
 boolean isEmpty()
          Tests the emptiness of the collection.
 Iterator<E> iterator()
           
 boolean remove(E element)
          Removes an element from the group.
 void setComparator(Comparator<E> comparator)
          Sets the collection's sort order, re-ordering the collection's contents and ensuring that new entries preserve the sort order.
 String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ImmutableSet

public ImmutableSet(Set<E> set)
Method Detail

add

public boolean add(E element)
Description copied from interface: Group
Adds an element to the group.

Specified by:
add in interface Group<E>
Specified by:
add in interface Set<E>
Parameters:
element - The element to add to the group.
Returns:
true if the element was added to the group; false, otherwise.
See Also:
SetListener.elementAdded(Set, Object)

remove

public boolean remove(E element)
Description copied from interface: Group
Removes an element from the group.

Specified by:
remove in interface Group<E>
Specified by:
remove in interface Set<E>
Parameters:
element - The element to remove from the set.
Returns:
true if the element was removed from the group; false, otherwise.
See Also:
SetListener.elementRemoved(Set, Object)

clear

public void clear()
Description copied from interface: Collection
Removes all elements from the collection.

Specified by:
clear in interface Collection<E>
Specified by:
clear in interface Set<E>
See Also:
SetListener.setCleared(Set)

contains

public boolean contains(E element)
Description copied from interface: Group
Tests the existence of an element in the group.

Specified by:
contains in interface Group<E>
Parameters:
element - The element whose presence in the group is to be tested.
Returns:
true if the element exists in the group; false, otherwise.

isEmpty

public boolean isEmpty()
Description copied from interface: Collection
Tests the emptiness of the collection.

Specified by:
isEmpty in interface Collection<E>
Returns:
true if the collection contains no elements; false, otherwise.

getCount

public int getCount()
Description copied from interface: Set
Returns the number of elements in the set.

Specified by:
getCount in interface Set<E>

getComparator

public Comparator<E> getComparator()
Description copied from interface: Collection
Returns the collection's sort order.

Specified by:
getComparator in interface Collection<E>
Returns:
The comparator used to order elements in the collection, or null if the sort order is undefined.
See Also:
Collection.setComparator(Comparator)

setComparator

public void setComparator(Comparator<E> comparator)
Description copied from interface: Collection
Sets the collection's sort order, re-ordering the collection's contents and ensuring that new entries preserve the sort order.

Calling this method more than once with the same comparator will re-sort the collection.

Specified by:
setComparator in interface Collection<E>
Specified by:
setComparator in interface Set<E>
Parameters:
comparator - The comparator used to order elements in the collection, or null if the collection is unsorted.
See Also:
SetListener.setCleared(Set)

iterator

public Iterator<E> iterator()
Specified by:
iterator in interface Iterable<E>

toString

public String toString()
Overrides:
toString in class Object

getSetListeners

public ListenerList<SetListener<E>> getSetListeners()
Description copied from interface: Set
Returns the set listener collection.

Specified by:
getSetListeners in interface Set<E>