Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
PrecedingSiblingAxisIterator |
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| 2.6;2.6 |
1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/util/PrecedingSiblingAxisIterator.java,v 1.13 2005/06/28 13:44:44 elharo Exp $ |
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3 | * $Revision: 1.13 $ |
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4 | * $Date: 2005/06/28 13:44:44 $ |
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5 | * |
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6 | * ==================================================================== |
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7 | * |
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8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * |
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15 | * 1. Redistributions of source code must retain the above copyright |
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16 | * notice, this list of conditions, and the following disclaimer. |
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17 | * |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions, and the disclaimer that follows |
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20 | * these conditions in the documentation and/or other materials |
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21 | * provided with the distribution. |
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22 | * |
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23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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24 | * derived from this software without prior written permission. For |
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25 | * written permission, please contact license@jaxen.org. |
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26 | * |
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27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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28 | * may "Jaxen" appear in their name, without prior written permission |
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29 | * from the Jaxen Project Management (pm@jaxen.org). |
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30 | * |
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31 | * In addition, we request (but do not require) that you include in the |
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32 | * end-user documentation provided with the redistribution and/or in the |
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33 | * software itself an acknowledgement equivalent to the following: |
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34 | * "This product includes software developed by the |
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35 | * Jaxen Project <http://www.jaxen.org/>." |
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36 | * Alternatively, the acknowledgment may be graphical using the logos |
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37 | * available at http://www.jaxen.org/ |
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38 | * |
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39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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50 | * SUCH DAMAGE. |
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51 | * |
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52 | * ==================================================================== |
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53 | * This software consists of voluntary contributions made by many |
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54 | * individuals on behalf of the Jaxen Project and was originally |
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55 | * created by bob mcwhirter <bob@werken.com> and |
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56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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58 | * |
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59 | * $Id: PrecedingSiblingAxisIterator.java,v 1.13 2005/06/28 13:44:44 elharo Exp $ |
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60 | */ |
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61 | ||
62 | ||
63 | ||
64 | package org.jaxen.util; |
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65 | ||
66 | import java.util.Iterator; |
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67 | import java.util.LinkedList; |
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68 | import java.util.NoSuchElementException; |
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69 | ||
70 | import org.jaxen.JaxenConstants; |
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71 | import org.jaxen.Navigator; |
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72 | import org.jaxen.UnsupportedAxisException; |
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73 | ||
74 | public class PrecedingSiblingAxisIterator implements Iterator |
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75 | { |
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76 | private Object contextNode; |
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77 | private Navigator navigator; |
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78 | ||
79 | private Iterator siblingIter; |
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80 | private Object nextObj; |
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81 | ||
82 | public PrecedingSiblingAxisIterator(Object contextNode, |
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83 | Navigator navigator) throws UnsupportedAxisException |
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84 | 1608 | { |
85 | 1608 | this.contextNode = contextNode; |
86 | 1608 | this.navigator = navigator; |
87 | ||
88 | 1608 | init(); |
89 | 1608 | if ( siblingIter.hasNext() ) |
90 | { |
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91 | 456 | this.nextObj = siblingIter.next(); |
92 | } |
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93 | 1608 | } |
94 | ||
95 | private void init() throws UnsupportedAxisException |
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96 | { |
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97 | ||
98 | 1608 | Object parent = this.navigator.getParentNode( this.contextNode ); |
99 | ||
100 | 1608 | if ( parent != null ) |
101 | { |
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102 | 1128 | Iterator childIter = this.navigator.getChildAxisIterator( parent ); |
103 | 1128 | LinkedList siblings = new LinkedList(); |
104 | ||
105 | 2580 | while ( childIter.hasNext() ) |
106 | { |
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107 | 2580 | Object eachChild = childIter.next(); |
108 | 2580 | if ( eachChild.equals(this.contextNode) ) |
109 | { |
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110 | 1128 | break; |
111 | } |
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112 | 1452 | siblings.addFirst( eachChild ); |
113 | } |
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114 | ||
115 | 1128 | this.siblingIter = siblings.iterator(); |
116 | ||
117 | } |
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118 | else { |
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119 | 480 | this.siblingIter = JaxenConstants.EMPTY_ITERATOR; |
120 | } |
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121 | ||
122 | 1608 | } |
123 | ||
124 | public boolean hasNext() |
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125 | { |
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126 | 4614 | return ( this.nextObj != null ); |
127 | } |
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128 | ||
129 | public Object next() throws NoSuchElementException |
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130 | { |
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131 | 1458 | if ( ! hasNext() ) |
132 | { |
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133 | 6 | throw new NoSuchElementException(); |
134 | } |
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135 | ||
136 | 1452 | Object obj = this.nextObj; |
137 | 1452 | if ( siblingIter.hasNext() ) |
138 | { |
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139 | 996 | this.nextObj = siblingIter.next(); |
140 | } |
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141 | else { |
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142 | 456 | this.nextObj = null; |
143 | } |
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144 | 1452 | return obj; |
145 | } |
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146 | ||
147 | public void remove() throws UnsupportedOperationException |
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148 | { |
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149 | 6 | throw new UnsupportedOperationException(); |
150 | } |
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151 | ||
152 | } |