org.apache.commons.collections.iterators
Class EmptyMapIterator

java.lang.Object
  extended byorg.apache.commons.collections.iterators.AbstractEmptyIterator
      extended byorg.apache.commons.collections.iterators.EmptyMapIterator
All Implemented Interfaces:
Iterator, MapIterator, ResettableIterator

public class EmptyMapIterator
extends org.apache.commons.collections.iterators.AbstractEmptyIterator
implements MapIterator, ResettableIterator

Provides an implementation of an empty map iterator.

Since:
Commons Collections 3.1
Version:
$Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $

Field Summary
static MapIterator INSTANCE
          Singleton instance of the iterator.
 
Constructor Summary
protected EmptyMapIterator()
          Constructor.
 
Method Summary
 void add(Object obj)
           
 Object getKey()
          Gets the current key, which is the key returned by the last call to next().
 Object getValue()
          Gets the current value, which is the value associated with the last key returned by next().
 boolean hasNext()
          Checks to see if there are more entries still to be iterated.
 boolean hasPrevious()
           
 Object next()
          Gets the next key from the Map.
 int nextIndex()
           
 Object previous()
           
 int previousIndex()
           
 void remove()
          Removes the last returned key from the underlying Map (optional operation).
 void reset()
          Resets the iterator back to the position at which the iterator was created.
 void set(Object obj)
           
 Object setValue(Object value)
          Sets the value associated with the current key (optional operation).
 
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.MapIterator
getKey, getValue, hasNext, next, remove, setValue
 
Methods inherited from interface org.apache.commons.collections.ResettableIterator
reset
 

Field Detail

INSTANCE

public static final MapIterator INSTANCE
Singleton instance of the iterator.

Since:
Commons Collections 3.1
Constructor Detail

EmptyMapIterator

protected EmptyMapIterator()
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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