1 /* 2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/util/LinkedIterator.java,v 1.8 2006/11/09 18:20:12 elharo Exp $ 3 * $Revision: 1.8 $ 4 * $Date: 2006/11/09 18:20:12 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright 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 are 13 * met: 14 * 15 * * Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 18 * * Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * * Neither the name of the Jaxen Project nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 27 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 30 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 32 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 * 38 * ==================================================================== 39 * This software consists of voluntary contributions made by many 40 * individuals on behalf of the Jaxen Project and was originally 41 * created by bob mcwhirter <bob@werken.com> and 42 * James Strachan <jstrachan@apache.org>. For more information on the 43 * Jaxen Project, please see <http://www.jaxen.org/>. 44 * 45 * $Id: LinkedIterator.java,v 1.8 2006/11/09 18:20:12 elharo Exp $ 46 */ 47 48 49 package org.jaxen.util; 50 51 import java.util.ArrayList; 52 import java.util.Iterator; 53 import java.util.List; 54 import java.util.NoSuchElementException; 55 56 /*** 57 * @deprecated This class is undocumented and untested. 58 * It will be removed in a future release. 59 */ 60 public class LinkedIterator implements Iterator 61 { 62 private List iterators; 63 private int cur; 64 65 public LinkedIterator() 66 { 67 this.iterators = new ArrayList(); 68 this.cur = 0; 69 } 70 71 public void addIterator(Iterator i) 72 { 73 this.iterators.add( i ); 74 } 75 76 public boolean hasNext() 77 { 78 boolean has = false; 79 80 if ( this.cur < this.iterators.size() ) 81 { 82 has = ((Iterator)this.iterators.get( this.cur )).hasNext(); 83 84 if ( ! has 85 && 86 this.cur < this.iterators.size() ) 87 { 88 ++this.cur; 89 has = hasNext(); 90 } 91 } 92 else 93 { 94 has = false; 95 } 96 97 return has; 98 } 99 100 public Object next() 101 { 102 if ( ! hasNext() ) 103 { 104 throw new NoSuchElementException(); 105 } 106 107 return ((Iterator)this.iterators.get( this.cur )).next(); 108 } 109 110 /*** 111 * This operation is not supported. 112 * 113 * @throws UnsupportedOperationException 114 */ 115 public void remove() 116 { 117 throw new UnsupportedOperationException(); 118 } 119 }