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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: Counter.java 468645 2006-10-28 06:57:24Z minchau $<a name="line.19"></a>
<FONT color="green">020</FONT>     */<a name="line.20"></a>
<FONT color="green">021</FONT>    package org.apache.xalan.transformer;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>    import javax.xml.transform.TransformerException;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import org.apache.xalan.templates.ElemNumber;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.xml.dtm.DTM;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.xpath.NodeSetDTM;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.xpath.XPathContext;<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>    /**<a name="line.30"></a>
<FONT color="green">031</FONT>     * A class that does incremental counting for support of xsl:number.<a name="line.31"></a>
<FONT color="green">032</FONT>     * This class stores a cache of counted nodes (m_countNodes).<a name="line.32"></a>
<FONT color="green">033</FONT>     * It tries to cache the counted nodes in document order...<a name="line.33"></a>
<FONT color="green">034</FONT>     * the node count is based on its position in the cache list<a name="line.34"></a>
<FONT color="green">035</FONT>     * @xsl.usage internal<a name="line.35"></a>
<FONT color="green">036</FONT>     */<a name="line.36"></a>
<FONT color="green">037</FONT>    public class Counter<a name="line.37"></a>
<FONT color="green">038</FONT>    {<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>      /**<a name="line.40"></a>
<FONT color="green">041</FONT>       * Set the maximum ammount the m_countNodes list can<a name="line.41"></a>
<FONT color="green">042</FONT>       * grow to.<a name="line.42"></a>
<FONT color="green">043</FONT>       */<a name="line.43"></a>
<FONT color="green">044</FONT>      static final int MAXCOUNTNODES = 500;<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>      /**<a name="line.46"></a>
<FONT color="green">047</FONT>       * The start count from where m_countNodes counts<a name="line.47"></a>
<FONT color="green">048</FONT>       * from.  In other words, the count of a given node<a name="line.48"></a>
<FONT color="green">049</FONT>       * in the m_countNodes vector is node position +<a name="line.49"></a>
<FONT color="green">050</FONT>       * m_countNodesStartCount.<a name="line.50"></a>
<FONT color="green">051</FONT>       */<a name="line.51"></a>
<FONT color="green">052</FONT>      int m_countNodesStartCount = 0;<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>      /**<a name="line.54"></a>
<FONT color="green">055</FONT>       * A vector of all nodes counted so far.<a name="line.55"></a>
<FONT color="green">056</FONT>       */<a name="line.56"></a>
<FONT color="green">057</FONT>      NodeSetDTM m_countNodes;<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>      /**<a name="line.59"></a>
<FONT color="green">060</FONT>       * The node from where the counting starts.  This is needed to<a name="line.60"></a>
<FONT color="green">061</FONT>       * find a counter if the node being counted is not immediatly<a name="line.61"></a>
<FONT color="green">062</FONT>       * found in the m_countNodes vector.<a name="line.62"></a>
<FONT color="green">063</FONT>       */<a name="line.63"></a>
<FONT color="green">064</FONT>      int m_fromNode = DTM.NULL;<a name="line.64"></a>
<FONT color="green">065</FONT>    <a name="line.65"></a>
<FONT color="green">066</FONT>      /**<a name="line.66"></a>
<FONT color="green">067</FONT>       * The owning xsl:number element.<a name="line.67"></a>
<FONT color="green">068</FONT>       */<a name="line.68"></a>
<FONT color="green">069</FONT>      ElemNumber m_numberElem;<a name="line.69"></a>
<FONT color="green">070</FONT>    <a name="line.70"></a>
<FONT color="green">071</FONT>      /**<a name="line.71"></a>
<FONT color="green">072</FONT>       * Value to store result of last getCount call, for benifit<a name="line.72"></a>
<FONT color="green">073</FONT>       * of returning val from CountersTable.getCounterByCounted,<a name="line.73"></a>
<FONT color="green">074</FONT>       * who calls getCount.<a name="line.74"></a>
<FONT color="green">075</FONT>       */<a name="line.75"></a>
<FONT color="green">076</FONT>      int m_countResult;<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>      /**<a name="line.78"></a>
<FONT color="green">079</FONT>       * Construct a counter object.<a name="line.79"></a>
<FONT color="green">080</FONT>       *<a name="line.80"></a>
<FONT color="green">081</FONT>       * @param numberElem The owning xsl:number element. <a name="line.81"></a>
<FONT color="green">082</FONT>       * @param countNodes A vector of all nodes counted so far.<a name="line.82"></a>
<FONT color="green">083</FONT>       *<a name="line.83"></a>
<FONT color="green">084</FONT>       * @throws TransformerException<a name="line.84"></a>
<FONT color="green">085</FONT>       */<a name="line.85"></a>
<FONT color="green">086</FONT>      Counter(ElemNumber numberElem, NodeSetDTM countNodes) throws TransformerException<a name="line.86"></a>
<FONT color="green">087</FONT>      {<a name="line.87"></a>
<FONT color="green">088</FONT>        m_countNodes = countNodes;<a name="line.88"></a>
<FONT color="green">089</FONT>        m_numberElem = numberElem;<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>       * Construct a counter object.<a name="line.93"></a>
<FONT color="green">094</FONT>       *<a name="line.94"></a>
<FONT color="green">095</FONT>       * @param numberElem The owning xsl:number element. <a name="line.95"></a>
<FONT color="green">096</FONT>       *<a name="line.96"></a>
<FONT color="green">097</FONT>       * @throws TransformerException<a name="line.97"></a>
<FONT color="green">098</FONT>       *<a name="line.98"></a>
<FONT color="green">099</FONT>      Counter(ElemNumber numberElem) throws TransformerException<a name="line.99"></a>
<FONT color="green">100</FONT>      {<a name="line.100"></a>
<FONT color="green">101</FONT>        m_numberElem = numberElem;<a name="line.101"></a>
<FONT color="green">102</FONT>      }*/<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>      /**<a name="line.104"></a>
<FONT color="green">105</FONT>       * Try and find a node that was previously counted. If found,<a name="line.105"></a>
<FONT color="green">106</FONT>       * return a positive integer that corresponds to the count.<a name="line.106"></a>
<FONT color="green">107</FONT>       *<a name="line.107"></a>
<FONT color="green">108</FONT>       * @param support The XPath context to use<a name="line.108"></a>
<FONT color="green">109</FONT>       * @param node The node to be counted.<a name="line.109"></a>
<FONT color="green">110</FONT>       * <a name="line.110"></a>
<FONT color="green">111</FONT>       * @return The count of the node, or -1 if not found.<a name="line.111"></a>
<FONT color="green">112</FONT>       */<a name="line.112"></a>
<FONT color="green">113</FONT>      int getPreviouslyCounted(XPathContext support, int node)<a name="line.113"></a>
<FONT color="green">114</FONT>      {<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>        int n = m_countNodes.size();<a name="line.116"></a>
<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>        m_countResult = 0;<a name="line.118"></a>
<FONT color="green">119</FONT>    <a name="line.119"></a>
<FONT color="green">120</FONT>        for (int i = n - 1; i &gt;= 0; i--)<a name="line.120"></a>
<FONT color="green">121</FONT>        {<a name="line.121"></a>
<FONT color="green">122</FONT>          int countedNode = m_countNodes.elementAt(i);<a name="line.122"></a>
<FONT color="green">123</FONT>    <a name="line.123"></a>
<FONT color="green">124</FONT>          if (node == countedNode)<a name="line.124"></a>
<FONT color="green">125</FONT>          {<a name="line.125"></a>
<FONT color="green">126</FONT>    <a name="line.126"></a>
<FONT color="green">127</FONT>            // Since the list is in backwards order, the count is <a name="line.127"></a>
<FONT color="green">128</FONT>            // how many are in the rest of the list.<a name="line.128"></a>
<FONT color="green">129</FONT>            m_countResult = i + 1 + m_countNodesStartCount;<a name="line.129"></a>
<FONT color="green">130</FONT>    <a name="line.130"></a>
<FONT color="green">131</FONT>            break;<a name="line.131"></a>
<FONT color="green">132</FONT>          }<a name="line.132"></a>
<FONT color="green">133</FONT>          <a name="line.133"></a>
<FONT color="green">134</FONT>          DTM dtm = support.getDTM(countedNode);<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>          // Try to see if the given node falls after the counted node...<a name="line.136"></a>
<FONT color="green">137</FONT>          // if it does, don't keep searching backwards.<a name="line.137"></a>
<FONT color="green">138</FONT>          if (dtm.isNodeAfter(countedNode, node))<a name="line.138"></a>
<FONT color="green">139</FONT>            break;<a name="line.139"></a>
<FONT color="green">140</FONT>        }<a name="line.140"></a>
<FONT color="green">141</FONT>    <a name="line.141"></a>
<FONT color="green">142</FONT>        return m_countResult;<a name="line.142"></a>
<FONT color="green">143</FONT>      }<a name="line.143"></a>
<FONT color="green">144</FONT>    <a name="line.144"></a>
<FONT color="green">145</FONT>      /**<a name="line.145"></a>
<FONT color="green">146</FONT>       * Get the last node in the list.<a name="line.146"></a>
<FONT color="green">147</FONT>       *<a name="line.147"></a>
<FONT color="green">148</FONT>       * @return the last node in the list.<a name="line.148"></a>
<FONT color="green">149</FONT>       */<a name="line.149"></a>
<FONT color="green">150</FONT>      int getLast()<a name="line.150"></a>
<FONT color="green">151</FONT>      {<a name="line.151"></a>
<FONT color="green">152</FONT>    <a name="line.152"></a>
<FONT color="green">153</FONT>        int size = m_countNodes.size();<a name="line.153"></a>
<FONT color="green">154</FONT>    <a name="line.154"></a>
<FONT color="green">155</FONT>        return (size &gt; 0) ? m_countNodes.elementAt(size - 1) : DTM.NULL;<a name="line.155"></a>
<FONT color="green">156</FONT>      }<a name="line.156"></a>
<FONT color="green">157</FONT>    }<a name="line.157"></a>


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