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