org.apache.commons.collections.iterators
Class EmptyIterator

java.lang.Object
  extended by org.apache.commons.collections.iterators.EmptyIterator
All Implemented Interfaces:
Iterator, ResettableIterator

public class EmptyIterator
extends Object
implements ResettableIterator

Provides an implementation of an empty iterator.

This class provides an implementation of an empty iterator. This class provides for binary compatability between Commons Collections 2.1.1 and 3.1 due to issues with IteratorUtils.

Since:
Commons Collections 2.1.1 and 3.1
Version:
$Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
Author:
Stephen Colebourne

Field Summary
static Iterator INSTANCE
          Singleton instance of the iterator.
static ResettableIterator RESETTABLE_INSTANCE
          Singleton instance of the iterator.
 
Constructor Summary
protected EmptyIterator()
          Constructor.
 
Method Summary
 void add(Object obj)
           
 Object getKey()
           
 Object getValue()
           
 boolean hasNext()
           
 boolean hasPrevious()
           
 Object next()
           
 int nextIndex()
           
 Object previous()
           
 int previousIndex()
           
 void remove()
           
 void reset()
           
 void set(Object obj)
           
 Object setValue(Object value)
           
 
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.collections.ResettableIterator
reset
 
Methods inherited from interface java.util.Iterator
hasNext, next, remove
 

Field Detail

RESETTABLE_INSTANCE

public static final ResettableIterator RESETTABLE_INSTANCE
Singleton instance of the iterator.

Since:
Commons Collections 3.1

INSTANCE

public static final Iterator INSTANCE
Singleton instance of the iterator.

Since:
Commons Collections 2.1.1 and 3.1
Constructor Detail

EmptyIterator

protected EmptyIterator()
Constructor.

Method Detail

hasNext

public boolean hasNext()

next

public Object next()

hasPrevious

public boolean hasPrevious()

previous

public Object previous()

nextIndex

public int nextIndex()

previousIndex

public int previousIndex()

add

public void add(Object obj)

set

public void set(Object obj)

remove

public void remove()

getKey

public Object getKey()

getValue

public Object getValue()

setValue

public Object setValue(Object value)

reset

public void reset()


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