de.rwth.utils
Class SingletonIterator

java.lang.Object
  |
  +--de.rwth.utils.SingletonIterator

All Implemented Interfaces:

java.util.Iterator

public class SingletonIterator

extends java.lang.Object

implements java.util.Iterator

Implements an Iterator with a single, non-null entry.

Version:

$Id: SingletonIterator.java,v 1.2 2002/09/17 06:53:53 mohnen Exp $

Author:

Markus Mohnen

See Also:

Iterator

Field Summary

protected java.lang.Object

o Contains the entry, or null if this element has already been retrieved.

Constructor Summary

SingletonIterator(java.lang.Object o)
Creates a new SingletonIterator instance.

Method Summary

boolean	hasNext() Implements the hasNext method from the Iterator interface.
java.lang.Object	next() Implements the next method from the Iterator interface.
void	remove() Implements the next method from the Iterator interface by always throwing an UnsupportedOperationException.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

o

protected java.lang.Object o

Contains the entry, or null if this element has already been retrieved.

Constructor Detail

SingletonIterator

public SingletonIterator(java.lang.Object o)

Creates a new SingletonIterator instance.

Parameters:

o - an Object value. If this is null, then the Iterator is empty.

Method Detail

hasNext

public boolean hasNext()

Implements the hasNext method from the Iterator interface.

Specified by:

hasNext in interface java.util.Iterator

Returns:

a boolean value

next

public java.lang.Object next()

Implements the next method from the Iterator interface.

Specified by:

next in interface java.util.Iterator

Returns:

an Object value

remove

public void remove()

Implements the next method from the Iterator interface by always throwing an UnsupportedOperationException.

Specified by:

remove in interface java.util.Iterator