Coverage Report - org.jaxen.util.FollowingAxisIterator

Classes in this File Line Coverage Branch Coverage Complexity
FollowingAxisIterator
93% 
100% 
3.667

 1  
 package org.jaxen.util;
 2  
 
 3  
 /*
 4  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/util/FollowingAxisIterator.java,v 1.6 2005/06/28 13:44:44 elharo Exp $
 5  
  * $Revision: 1.6 $
 6  
  * $Date: 2005/06/28 13:44:44 $
 7  
  *
 8  
  * ====================================================================
 9  
  *
 10  
  * Copyright (C) 2000-2005 bob mcwhirter & James Strachan.
 11  
  * All rights reserved.
 12  
  *
 13  
  * Redistribution and use in source and binary forms, with or without
 14  
  * modification, are permitted provided that the following conditions
 15  
  * are met:
 16  
  *
 17  
  * 1. Redistributions of source code must retain the above copyright
 18  
  *    notice, this list of conditions, and the following disclaimer.
 19  
  *
 20  
  * 2. Redistributions in binary form must reproduce the above copyright
 21  
  *    notice, this list of conditions, and the disclaimer that follows
 22  
  *    these conditions in the documentation and/or other materials
 23  
  *    provided with the distribution.
 24  
  *
 25  
  * 3. The name "Jaxen" must not be used to endorse or promote products
 26  
  *    derived from this software without prior written permission.  For
 27  
  *    written permission, please contact license@jaxen.org.
 28  
  *
 29  
  * 4. Products derived from this software may not be called "Jaxen", nor
 30  
  *    may "Jaxen" appear in their name, without prior written permission
 31  
  *    from the Jaxen Project Management (pm@jaxen.org).
 32  
  *
 33  
  * In addition, we request (but do not require) that you include in the
 34  
  * end-user documentation provided with the redistribution and/or in the
 35  
  * software itself an acknowledgement equivalent to the following:
 36  
  *     "This product includes software developed by the
 37  
  *      Jaxen Project <http://www.jaxen.org/>."
 38  
  * Alternatively, the acknowledgment may be graphical using the logos
 39  
  * available at http://www.jaxen.org/
 40  
  *
 41  
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 42  
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 43  
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 44  
  * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
 45  
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 46  
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 47  
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 48  
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 49  
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 50  
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 51  
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 52  
  * SUCH DAMAGE.
 53  
  *
 54  
  * ====================================================================
 55  
  * This software consists of voluntary contributions made by many
 56  
  * individuals on behalf of the Jaxen Project and was originally
 57  
  * created by bob mcwhirter <bob@werken.com> and
 58  
  * James Strachan <jstrachan@apache.org>.  For more information on the
 59  
  * Jaxen Project, please see <http://www.jaxen.org/>.
 60  
  *
 61  
  * $Id: FollowingAxisIterator.java,v 1.6 2005/06/28 13:44:44 elharo Exp $
 62  
 */
 63  
 
 64  
 import java.util.Iterator;
 65  
 import java.util.NoSuchElementException;
 66  
 
 67  
 import org.jaxen.Navigator;
 68  
 import org.jaxen.UnsupportedAxisException;
 69  
 import org.jaxen.JaxenRuntimeException;
 70  
 import org.jaxen.JaxenConstants;
 71  
 
 72  
 public class FollowingAxisIterator implements Iterator
 73  
 {
 74  
     private Object contextNode;
 75  
     
 76  
     private Navigator navigator;
 77  
 
 78  
     private Iterator siblings;
 79  
 
 80  
     private Iterator currentSibling;
 81  
 
 82  
     public FollowingAxisIterator(Object contextNode,
 83  
                                  Navigator navigator) throws UnsupportedAxisException
 84  156
     {
 85  156
         this.contextNode = contextNode;
 86  156
         this.navigator = navigator;
 87  156
         this.siblings = navigator.getFollowingSiblingAxisIterator(contextNode);
 88  156
         this.currentSibling = JaxenConstants.EMPTY_ITERATOR;
 89  156
     }
 90  
 
 91  
     private boolean goForward()
 92  
     {
 93  942
         while ( ! siblings.hasNext() )
 94  
         {
 95  366
             if ( !goUp() )
 96  
             {
 97  150
                 return false;
 98  
             }
 99  
         }
 100  
 
 101  576
         Object nextSibling = siblings.next();
 102  
 
 103  576
         this.currentSibling = new DescendantOrSelfAxisIterator(nextSibling, navigator);
 104  
 
 105  576
         return true;
 106  
     }
 107  
 
 108  
     private boolean goUp()
 109  
     {
 110  366
         if ( contextNode == null
 111  
              ||
 112  
              navigator.isDocument(contextNode) )
 113  
         {
 114  24
             return false;
 115  
         }
 116  
 
 117  
         try
 118  
         {
 119  342
             contextNode = navigator.getParentNode( contextNode );
 120  
 
 121  342
             if ( contextNode != null
 122  
                  &&
 123  
                  !navigator.isDocument(contextNode) )
 124  
             {
 125  216
                 siblings = navigator.getFollowingSiblingAxisIterator(contextNode);
 126  216
                 return true;
 127  
             }
 128  
             else
 129  
             {
 130  126
                 return false;
 131  
             }
 132  
         }
 133  0
         catch (UnsupportedAxisException e)
 134  
         {
 135  0
             throw new JaxenRuntimeException(e);
 136  
         }
 137  
     }
 138  
 
 139  
     public boolean hasNext()
 140  
     {
 141  4272
         while ( ! currentSibling.hasNext() )
 142  
         {
 143  726
             if ( ! goForward() )
 144  
             {
 145  150
                 return false;
 146  
             }
 147  
         }
 148  
 
 149  3546
         return true;
 150  
     }
 151  
 
 152  
     public Object next() throws NoSuchElementException
 153  
     {
 154  1734
         if ( ! hasNext() )
 155  
         {
 156  6
             throw new NoSuchElementException();
 157  
         }
 158  
 
 159  1728
         return currentSibling.next();
 160  
     }
 161  
 
 162  
     public void remove() throws UnsupportedOperationException
 163  
     {
 164  6
         throw new UnsupportedOperationException();
 165  
     }
 166  
 }