/*
* $Id$
*
* Copyright 2006, The jCoderZ.org Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the jCoderZ.org Project nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jcoderz.commons.util;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* An empty iterator that is just empty.
*
* @author Andreas Mandel
*/
public final class EmptyIterator
implements Iterator
{
/** The constant no state EmptyIterator. */
public static final Iterator EMPTY_ITERATOR = new EmptyIterator();
/**
* No instances use the EMPTY_ITERATOR constant.
*/
private EmptyIterator ()
{
// nothing to do.
}
/**
* {@inheritDoc}
* @throws IllegalStateException always.
*/
public void remove ()
throws IllegalStateException
{
throw new IllegalStateException();
}
/**
* {@inheritDoc}
* Always returns false.
*/
public boolean hasNext ()
{
return false;
}
/**
* {@inheritDoc}
* @throws NoSuchElementException always.
*/
public Object next ()
throws NoSuchElementException
{
throw new NoSuchElementException();
}
}