package org.orbeon.jaxen; /* * $Header: $ * $Revision: $ * $Date: $ * * ==================================================================== * * Copyright 2000-2005 bob mcwhirter & James Strachan. * 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 Jaxen 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER * OR 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. * * ==================================================================== * This software consists of voluntary contributions made by many * individuals on behalf of the Jaxen Project and was originally * created by bob mcwhirter <bob@werken.com> and * James Strachan <jstrachan@apache.org>. For more information on the * Jaxen Project, please see <http://www.jaxen.org/>. * * $Id: $ */ import java.util.Collections; import java.util.Iterator; import java.util.ListIterator; /** * Thread-safe constant iterators used to avoid the overhead of creating * empty lists. */ public class JaxenConstants { private JaxenConstants() {} /** * An iterator with no elements. <code>hasNext()</code> always * returns false. This is thread-safe. */ public static final Iterator EMPTY_ITERATOR = Collections.EMPTY_LIST.iterator(); /** * A list iterator with no elements. <code>hasNext()</code> always * returns false. This is thread-safe. */ public static final ListIterator EMPTY_LIST_ITERATOR = Collections.EMPTY_LIST.listIterator(); }