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| <FONT color="green">001</FONT> /*<a name="line.1"></a> |
| <FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <FONT color="green">003</FONT> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <FONT color="green">004</FONT> * distributed with this work for additional information<a name="line.4"></a> |
| <FONT color="green">005</FONT> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <FONT color="green">006</FONT> * to you under the Apache License, Version 2.0 (the "License");<a name="line.6"></a> |
| <FONT color="green">007</FONT> * you may not use this file except in compliance with the License.<a name="line.7"></a> |
| <FONT color="green">008</FONT> * You may obtain a copy of the License at<a name="line.8"></a> |
| <FONT color="green">009</FONT> *<a name="line.9"></a> |
| <FONT color="green">010</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <FONT color="green">011</FONT> *<a name="line.11"></a> |
| <FONT color="green">012</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <FONT color="green">013</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <FONT color="green">014</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <FONT color="green">015</FONT> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <FONT color="green">016</FONT> * limitations under the License.<a name="line.16"></a> |
| <FONT color="green">017</FONT> */<a name="line.17"></a> |
| <FONT color="green">018</FONT> /*<a name="line.18"></a> |
| <FONT color="green">019</FONT> * $Id: DTMAxisIterNodeList.java 468653 2006-10-28 07:07:05Z minchau $<a name="line.19"></a> |
| <FONT color="green">020</FONT> */<a name="line.20"></a> |
| <FONT color="green">021</FONT> package org.apache.xml.dtm.ref;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import org.apache.xml.dtm.DTM;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import org.apache.xml.dtm.DTMAxisIterator;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.xml.utils.IntVector;<a name="line.25"></a> |
| <FONT color="green">026</FONT> <a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.w3c.dom.Node;<a name="line.27"></a> |
| <FONT color="green">028</FONT> <a name="line.28"></a> |
| <FONT color="green">029</FONT> /**<a name="line.29"></a> |
| <FONT color="green">030</FONT> * <code>DTMAxisNodeList</code> gives us an implementation of the DOM's<a name="line.30"></a> |
| <FONT color="green">031</FONT> * NodeList interface wrapped around a DTM Iterator. The author<a name="line.31"></a> |
| <FONT color="green">032</FONT> * considers this something of an abominations, since NodeList was not<a name="line.32"></a> |
| <FONT color="green">033</FONT> * intended to be a general purpose "list of nodes" API and is<a name="line.33"></a> |
| <FONT color="green">034</FONT> * generally considered by the DOM WG to have be a mistake... but I'm<a name="line.34"></a> |
| <FONT color="green">035</FONT> * told that some of the XPath/XSLT folks say they must have this<a name="line.35"></a> |
| <FONT color="green">036</FONT> * solution.<a name="line.36"></a> |
| <FONT color="green">037</FONT> *<a name="line.37"></a> |
| <FONT color="green">038</FONT> * Please note that this is not necessarily equivlaent to a DOM<a name="line.38"></a> |
| <FONT color="green">039</FONT> * NodeList operating over the same document. In particular:<a name="line.39"></a> |
| <FONT color="green">040</FONT> * <ul><a name="line.40"></a> |
| <FONT color="green">041</FONT> *<a name="line.41"></a> |
| <FONT color="green">042</FONT> * <li>If there are several Text nodes in logical succession (ie,<a name="line.42"></a> |
| <FONT color="green">043</FONT> * across CDATASection and EntityReference boundaries), we will return<a name="line.43"></a> |
| <FONT color="green">044</FONT> * only the first; the caller is responsible for stepping through<a name="line.44"></a> |
| <FONT color="green">045</FONT> * them.<a name="line.45"></a> |
| <FONT color="green">046</FONT> * (%REVIEW% Provide a convenience routine here to assist, pending<a name="line.46"></a> |
| <FONT color="green">047</FONT> * proposed DOM Level 3 getAdjacentText() operation?) </li><a name="line.47"></a> |
| <FONT color="green">048</FONT> *<a name="line.48"></a> |
| <FONT color="green">049</FONT> * <li>Since the whole XPath/XSLT architecture assumes that the source<a name="line.49"></a> |
| <FONT color="green">050</FONT> * document is not altered while we're working with it, we do not<a name="line.50"></a> |
| <FONT color="green">051</FONT> * promise to implement the DOM NodeList's "live view" response to<a name="line.51"></a> |
| <FONT color="green">052</FONT> * document mutation. </li><a name="line.52"></a> |
| <FONT color="green">053</FONT> *<a name="line.53"></a> |
| <FONT color="green">054</FONT> * </ul><a name="line.54"></a> |
| <FONT color="green">055</FONT> *<a name="line.55"></a> |
| <FONT color="green">056</FONT> * <p>State: In progress!!</p><a name="line.56"></a> |
| <FONT color="green">057</FONT> * */<a name="line.57"></a> |
| <FONT color="green">058</FONT> public class DTMAxisIterNodeList extends DTMNodeListBase {<a name="line.58"></a> |
| <FONT color="green">059</FONT> private DTM m_dtm;<a name="line.59"></a> |
| <FONT color="green">060</FONT> private DTMAxisIterator m_iter;<a name="line.60"></a> |
| <FONT color="green">061</FONT> private IntVector m_cachedNodes;<a name="line.61"></a> |
| <FONT color="green">062</FONT> private int m_last = -1;<a name="line.62"></a> |
| <FONT color="green">063</FONT> //================================================================<a name="line.63"></a> |
| <FONT color="green">064</FONT> // Methods unique to this class<a name="line.64"></a> |
| <FONT color="green">065</FONT> private DTMAxisIterNodeList() {<a name="line.65"></a> |
| <FONT color="green">066</FONT> }<a name="line.66"></a> |
| <FONT color="green">067</FONT> <a name="line.67"></a> |
| <FONT color="green">068</FONT> /**<a name="line.68"></a> |
| <FONT color="green">069</FONT> * Public constructor: Wrap a DTMNodeList around an existing<a name="line.69"></a> |
| <FONT color="green">070</FONT> * and preconfigured DTMAxisIterator<a name="line.70"></a> |
| <FONT color="green">071</FONT> */<a name="line.71"></a> |
| <FONT color="green">072</FONT> public DTMAxisIterNodeList(DTM dtm, DTMAxisIterator dtmAxisIterator) {<a name="line.72"></a> |
| <FONT color="green">073</FONT> if (dtmAxisIterator == null) {<a name="line.73"></a> |
| <FONT color="green">074</FONT> m_last = 0;<a name="line.74"></a> |
| <FONT color="green">075</FONT> } else {<a name="line.75"></a> |
| <FONT color="green">076</FONT> m_cachedNodes = new IntVector();<a name="line.76"></a> |
| <FONT color="green">077</FONT> m_dtm = dtm;<a name="line.77"></a> |
| <FONT color="green">078</FONT> }<a name="line.78"></a> |
| <FONT color="green">079</FONT> m_iter = dtmAxisIterator;<a name="line.79"></a> |
| <FONT color="green">080</FONT> }<a name="line.80"></a> |
| <FONT color="green">081</FONT> <a name="line.81"></a> |
| <FONT color="green">082</FONT> /**<a name="line.82"></a> |
| <FONT color="green">083</FONT> * Access the wrapped DTMIterator. I'm not sure whether anyone will<a name="line.83"></a> |
| <FONT color="green">084</FONT> * need this or not, but let's write it and think about it.<a name="line.84"></a> |
| <FONT color="green">085</FONT> *<a name="line.85"></a> |
| <FONT color="green">086</FONT> */<a name="line.86"></a> |
| <FONT color="green">087</FONT> public DTMAxisIterator getDTMAxisIterator() {<a name="line.87"></a> |
| <FONT color="green">088</FONT> return m_iter;<a name="line.88"></a> |
| <FONT color="green">089</FONT> }<a name="line.89"></a> |
| <FONT color="green">090</FONT> <a name="line.90"></a> |
| <FONT color="green">091</FONT> <a name="line.91"></a> |
| <FONT color="green">092</FONT> //================================================================<a name="line.92"></a> |
| <FONT color="green">093</FONT> // org.w3c.dom.NodeList API follows<a name="line.93"></a> |
| <FONT color="green">094</FONT> <a name="line.94"></a> |
| <FONT color="green">095</FONT> /**<a name="line.95"></a> |
| <FONT color="green">096</FONT> * Returns the <code>index</code>th item in the collection. If <a name="line.96"></a> |
| <FONT color="green">097</FONT> * <code>index</code> is greater than or equal to the number of nodes in <a name="line.97"></a> |
| <FONT color="green">098</FONT> * the list, this returns <code>null</code>.<a name="line.98"></a> |
| <FONT color="green">099</FONT> * @param index Index into the collection.<a name="line.99"></a> |
| <FONT color="green">100</FONT> * @return The node at the <code>index</code>th position in the <a name="line.100"></a> |
| <FONT color="green">101</FONT> * <code>NodeList</code>, or <code>null</code> if that is not a valid <a name="line.101"></a> |
| <FONT color="green">102</FONT> * index.<a name="line.102"></a> |
| <FONT color="green">103</FONT> */<a name="line.103"></a> |
| <FONT color="green">104</FONT> public Node item(int index) {<a name="line.104"></a> |
| <FONT color="green">105</FONT> if (m_iter != null) {<a name="line.105"></a> |
| <FONT color="green">106</FONT> int node;<a name="line.106"></a> |
| <FONT color="green">107</FONT> int count = m_cachedNodes.size();<a name="line.107"></a> |
| <FONT color="green">108</FONT> <a name="line.108"></a> |
| <FONT color="green">109</FONT> if (count > index) {<a name="line.109"></a> |
| <FONT color="green">110</FONT> node = m_cachedNodes.elementAt(index);<a name="line.110"></a> |
| <FONT color="green">111</FONT> return m_dtm.getNode(node);<a name="line.111"></a> |
| <FONT color="green">112</FONT> } else if (m_last == -1) {<a name="line.112"></a> |
| <FONT color="green">113</FONT> while (((node = m_iter.next()) != DTMAxisIterator.END)<a name="line.113"></a> |
| <FONT color="green">114</FONT> && count <= index) {<a name="line.114"></a> |
| <FONT color="green">115</FONT> m_cachedNodes.addElement(node);<a name="line.115"></a> |
| <FONT color="green">116</FONT> count++;<a name="line.116"></a> |
| <FONT color="green">117</FONT> }<a name="line.117"></a> |
| <FONT color="green">118</FONT> if (node == DTMAxisIterator.END) {<a name="line.118"></a> |
| <FONT color="green">119</FONT> m_last = count;<a name="line.119"></a> |
| <FONT color="green">120</FONT> } else {<a name="line.120"></a> |
| <FONT color="green">121</FONT> return m_dtm.getNode(node);<a name="line.121"></a> |
| <FONT color="green">122</FONT> }<a name="line.122"></a> |
| <FONT color="green">123</FONT> }<a name="line.123"></a> |
| <FONT color="green">124</FONT> }<a name="line.124"></a> |
| <FONT color="green">125</FONT> return null;<a name="line.125"></a> |
| <FONT color="green">126</FONT> }<a name="line.126"></a> |
| <FONT color="green">127</FONT> <a name="line.127"></a> |
| <FONT color="green">128</FONT> /**<a name="line.128"></a> |
| <FONT color="green">129</FONT> * The number of nodes in the list. The range of valid child node indices <a name="line.129"></a> |
| <FONT color="green">130</FONT> * is 0 to <code>length-1</code> inclusive. <a name="line.130"></a> |
| <FONT color="green">131</FONT> */<a name="line.131"></a> |
| <FONT color="green">132</FONT> public int getLength() {<a name="line.132"></a> |
| <FONT color="green">133</FONT> if (m_last == -1) {<a name="line.133"></a> |
| <FONT color="green">134</FONT> int node;<a name="line.134"></a> |
| <FONT color="green">135</FONT> while ((node = m_iter.next()) != DTMAxisIterator.END) {<a name="line.135"></a> |
| <FONT color="green">136</FONT> m_cachedNodes.addElement(node);<a name="line.136"></a> |
| <FONT color="green">137</FONT> }<a name="line.137"></a> |
| <FONT color="green">138</FONT> m_last = m_cachedNodes.size();<a name="line.138"></a> |
| <FONT color="green">139</FONT> }<a name="line.139"></a> |
| <FONT color="green">140</FONT> return m_last;<a name="line.140"></a> |
| <FONT color="green">141</FONT> }<a name="line.141"></a> |
| <FONT color="green">142</FONT> }<a name="line.142"></a> |
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