1 /* 2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/util/FollowingSiblingAxisIterator.java,v 1.6 2005/04/06 09:13:58 elharo Exp $ 3 * $Revision: 1.6 $ 4 * $Date: 2005/04/06 09:13:58 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions, and the disclaimer that follows 20 * these conditions in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * 3. The name "Jaxen" must not be used to endorse or promote products 24 * derived from this software without prior written permission. For 25 * written permission, please contact license@jaxen.org. 26 * 27 * 4. Products derived from this software may not be called "Jaxen", nor 28 * may "Jaxen" appear in their name, without prior written permission 29 * from the Jaxen Project Management (pm@jaxen.org). 30 * 31 * In addition, we request (but do not require) that you include in the 32 * end-user documentation provided with the redistribution and/or in the 33 * software itself an acknowledgement equivalent to the following: 34 * "This product includes software developed by the 35 * Jaxen Project (http://www.jaxen.org/)." 36 * Alternatively, the acknowledgment may be graphical using the logos 37 * available at http://www.jaxen.org/ 38 * 39 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 40 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 42 * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT 43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 45 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 46 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 49 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * ==================================================================== 53 * This software consists of voluntary contributions made by many 54 * individuals on behalf of the Jaxen Project and was originally 55 * created by bob mcwhirter <bob@werken.com> and 56 * James Strachan <jstrachan@apache.org>. For more information on the 57 * Jaxen Project, please see <http://www.jaxen.org/>. 58 * 59 * $Id: FollowingSiblingAxisIterator.java,v 1.6 2005/04/06 09:13:58 elharo Exp $ 60 */ 61 62 63 64 package org.jaxen.util; 65 66 import java.util.Collections; 67 import java.util.Iterator; 68 import java.util.NoSuchElementException; 69 70 import org.jaxen.Navigator; 71 import org.jaxen.UnsupportedAxisException; 72 73 public class FollowingSiblingAxisIterator implements Iterator 74 { 75 private Object contextNode; 76 private Navigator navigator; 77 78 private Iterator siblingIter; 79 80 public FollowingSiblingAxisIterator(Object contextNode, 81 Navigator navigator) throws UnsupportedAxisException 82 { 83 this.contextNode = contextNode; 84 this.navigator = navigator; 85 init(); 86 } 87 88 private void init() throws UnsupportedAxisException 89 { 90 Object parent = this.navigator.getParentNode( this.contextNode ); 91 92 if ( parent != null ) 93 { 94 siblingIter = this.navigator.getChildAxisIterator( parent ); 95 Object eachChild = null; 96 97 while ( siblingIter.hasNext() ) 98 { 99 eachChild = siblingIter.next(); 100 if ( eachChild == this.contextNode ) break; 101 } 102 } 103 else { 104 siblingIter = Collections.EMPTY_LIST.iterator(); 105 } 106 107 } 108 109 public boolean hasNext() 110 { 111 return siblingIter.hasNext(); 112 } 113 114 public Object next() throws NoSuchElementException 115 { 116 return siblingIter.next(); 117 } 118 119 public void remove() throws UnsupportedOperationException 120 { 121 throw new UnsupportedOperationException(); 122 } 123 124 }