Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
FollowingAxisIterator |
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| 3.6666666666666665;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 1.8 2006/11/09 18:20:12 elharo Exp $ | |
5 | * $Revision: 1.8 $ | |
6 | * $Date: 2006/11/09 18:20:12 $ | |
7 | * | |
8 | * ==================================================================== | |
9 | * | |
10 | * Copyright 2000-2005 bob mcwhirter & James Strachan. | |
11 | * All rights reserved. | |
12 | * | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or without | |
15 | * modification, are permitted provided that the following conditions are | |
16 | * met: | |
17 | * | |
18 | * * Redistributions of source code must retain the above copyright | |
19 | * notice, this list of conditions and the following disclaimer. | |
20 | * | |
21 | * * Redistributions in binary form must reproduce the above copyright | |
22 | * notice, this list of conditions and the following disclaimer in the | |
23 | * documentation and/or other materials provided with the distribution. | |
24 | * | |
25 | * * Neither the name of the Jaxen Project nor the names of its | |
26 | * contributors may be used to endorse or promote products derived | |
27 | * from this software without specific prior written permission. | |
28 | * | |
29 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
30 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
31 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
32 | * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
33 | * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
34 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
35 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
36 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
37 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
38 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
39 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
40 | * | |
41 | * ==================================================================== | |
42 | * This software consists of voluntary contributions made by many | |
43 | * individuals on behalf of the Jaxen Project and was originally | |
44 | * created by bob mcwhirter <bob@werken.com> and | |
45 | * James Strachan <jstrachan@apache.org>. For more information on the | |
46 | * Jaxen Project, please see <http://www.jaxen.org/>. | |
47 | * | |
48 | * $Id: FollowingAxisIterator.java,v 1.8 2006/11/09 18:20:12 elharo Exp $ | |
49 | */ | |
50 | ||
51 | import java.util.Iterator; | |
52 | import java.util.NoSuchElementException; | |
53 | ||
54 | import org.jaxen.Navigator; | |
55 | import org.jaxen.UnsupportedAxisException; | |
56 | import org.jaxen.JaxenRuntimeException; | |
57 | import org.jaxen.JaxenConstants; | |
58 | ||
59 | /** | |
60 | * Represents the XPath <code>following</code> axis. | |
61 | * The "<code>following</code> axis contains all nodes in the same document as the context | |
62 | * node that are after the context node in document order, excluding any descendants | |
63 | * and excluding attribute nodes and namespace nodes." | |
64 | * | |
65 | * @version 1.2b12 | |
66 | */ | |
67 | public class FollowingAxisIterator implements Iterator | |
68 | { | |
69 | private Object contextNode; | |
70 | ||
71 | private Navigator navigator; | |
72 | ||
73 | private Iterator siblings; | |
74 | ||
75 | private Iterator currentSibling; | |
76 | ||
77 | /** | |
78 | * Create a new <code>following</code> axis iterator. | |
79 | * | |
80 | * @param contextNode the node to start from | |
81 | * @param navigator the object model specific navigator | |
82 | */ | |
83 | public FollowingAxisIterator(Object contextNode, | |
84 | Navigator navigator) throws UnsupportedAxisException | |
85 | 52 | { |
86 | 52 | this.contextNode = contextNode; |
87 | 52 | this.navigator = navigator; |
88 | 52 | this.siblings = navigator.getFollowingSiblingAxisIterator(contextNode); |
89 | 52 | this.currentSibling = JaxenConstants.EMPTY_ITERATOR; |
90 | 52 | } |
91 | ||
92 | private boolean goForward() | |
93 | { | |
94 | 314 | while ( ! siblings.hasNext() ) |
95 | { | |
96 | 122 | if ( !goUp() ) |
97 | { | |
98 | 50 | return false; |
99 | } | |
100 | } | |
101 | ||
102 | 192 | Object nextSibling = siblings.next(); |
103 | ||
104 | 192 | this.currentSibling = new DescendantOrSelfAxisIterator(nextSibling, navigator); |
105 | ||
106 | 192 | return true; |
107 | } | |
108 | ||
109 | private boolean goUp() | |
110 | { | |
111 | 122 | if ( contextNode == null |
112 | || | |
113 | navigator.isDocument(contextNode) ) | |
114 | { | |
115 | 8 | return false; |
116 | } | |
117 | ||
118 | try | |
119 | { | |
120 | 114 | contextNode = navigator.getParentNode( contextNode ); |
121 | ||
122 | 114 | if ( contextNode != null |
123 | && | |
124 | !navigator.isDocument(contextNode) ) | |
125 | { | |
126 | 72 | siblings = navigator.getFollowingSiblingAxisIterator(contextNode); |
127 | 72 | return true; |
128 | } | |
129 | else | |
130 | { | |
131 | 42 | return false; |
132 | } | |
133 | } | |
134 | 0 | catch (UnsupportedAxisException e) |
135 | { | |
136 | 0 | throw new JaxenRuntimeException(e); |
137 | } | |
138 | } | |
139 | ||
140 | /** | |
141 | * Returns true if there are any following nodes remaining; | |
142 | * false otherwise. | |
143 | * | |
144 | * @return true if any following nodes remain | |
145 | * | |
146 | * @see java.util.Iterator#hasNext() | |
147 | */ | |
148 | public boolean hasNext() | |
149 | { | |
150 | 1424 | while ( ! currentSibling.hasNext() ) |
151 | { | |
152 | 242 | if ( ! goForward() ) |
153 | { | |
154 | 50 | return false; |
155 | } | |
156 | } | |
157 | ||
158 | 1182 | return true; |
159 | } | |
160 | ||
161 | /** | |
162 | * Returns the next following node. | |
163 | * | |
164 | * @return the next following node | |
165 | * | |
166 | * @throws NoSuchElementException if no following nodes remain | |
167 | * | |
168 | * @see java.util.Iterator#next() | |
169 | */ | |
170 | public Object next() throws NoSuchElementException | |
171 | { | |
172 | 578 | if ( ! hasNext() ) |
173 | { | |
174 | 2 | throw new NoSuchElementException(); |
175 | } | |
176 | ||
177 | 576 | return currentSibling.next(); |
178 | } | |
179 | ||
180 | /** | |
181 | * This operation is not supported. | |
182 | * | |
183 | * @throws UnsupportedOperationException always | |
184 | */ | |
185 | public void remove() throws UnsupportedOperationException | |
186 | { | |
187 | 2 | throw new UnsupportedOperationException(); |
188 | } | |
189 | } |