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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: ExsltDynamic.java 468639 2006-10-28 06:52:33Z 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.lib;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import javax.xml.parsers.DocumentBuilder;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import javax.xml.parsers.DocumentBuilderFactory;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import javax.xml.transform.TransformerException;<a name="line.25"></a> |
| <FONT color="green">026</FONT> <a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xalan.extensions.ExpressionContext;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xalan.res.XSLMessages;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.xalan.res.XSLTErrorResources;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xpath.NodeSet;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import org.apache.xpath.NodeSetDTM;<a name="line.31"></a> |
| <FONT color="green">032</FONT> import org.apache.xpath.XPath;<a name="line.32"></a> |
| <FONT color="green">033</FONT> import org.apache.xpath.XPathContext;<a name="line.33"></a> |
| <FONT color="green">034</FONT> import org.apache.xpath.objects.XBoolean;<a name="line.34"></a> |
| <FONT color="green">035</FONT> import org.apache.xpath.objects.XNodeSet;<a name="line.35"></a> |
| <FONT color="green">036</FONT> import org.apache.xpath.objects.XNumber;<a name="line.36"></a> |
| <FONT color="green">037</FONT> import org.apache.xpath.objects.XObject;<a name="line.37"></a> |
| <FONT color="green">038</FONT> <a name="line.38"></a> |
| <FONT color="green">039</FONT> import org.w3c.dom.Document;<a name="line.39"></a> |
| <FONT color="green">040</FONT> import org.w3c.dom.Element;<a name="line.40"></a> |
| <FONT color="green">041</FONT> import org.w3c.dom.Node;<a name="line.41"></a> |
| <FONT color="green">042</FONT> import org.w3c.dom.NodeList;<a name="line.42"></a> |
| <FONT color="green">043</FONT> import org.w3c.dom.Text;<a name="line.43"></a> |
| <FONT color="green">044</FONT> <a name="line.44"></a> |
| <FONT color="green">045</FONT> import org.xml.sax.SAXNotSupportedException;<a name="line.45"></a> |
| <FONT color="green">046</FONT> <a name="line.46"></a> |
| <FONT color="green">047</FONT> /**<a name="line.47"></a> |
| <FONT color="green">048</FONT> * This class contains EXSLT dynamic extension functions.<a name="line.48"></a> |
| <FONT color="green">049</FONT> *<a name="line.49"></a> |
| <FONT color="green">050</FONT> * It is accessed by specifying a namespace URI as follows:<a name="line.50"></a> |
| <FONT color="green">051</FONT> * <pre><a name="line.51"></a> |
| <FONT color="green">052</FONT> * xmlns:dyn="http://exslt.org/dynamic"<a name="line.52"></a> |
| <FONT color="green">053</FONT> * </pre><a name="line.53"></a> |
| <FONT color="green">054</FONT> * The documentation for each function has been copied from the relevant<a name="line.54"></a> |
| <FONT color="green">055</FONT> * EXSLT Implementer page.<a name="line.55"></a> |
| <FONT color="green">056</FONT> * <a name="line.56"></a> |
| <FONT color="green">057</FONT> * @see <a href="http://www.exslt.org/">EXSLT</a><a name="line.57"></a> |
| <FONT color="green">058</FONT> <a name="line.58"></a> |
| <FONT color="green">059</FONT> * @xsl.usage general<a name="line.59"></a> |
| <FONT color="green">060</FONT> */<a name="line.60"></a> |
| <FONT color="green">061</FONT> public class ExsltDynamic extends ExsltBase<a name="line.61"></a> |
| <FONT color="green">062</FONT> {<a name="line.62"></a> |
| <FONT color="green">063</FONT> <a name="line.63"></a> |
| <FONT color="green">064</FONT> public static final String EXSL_URI = "http://exslt.org/common";<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 dyn:max function calculates the maximum value for the nodes passed as <a name="line.67"></a> |
| <FONT color="green">068</FONT> * the first argument, where the value of each node is calculated dynamically <a name="line.68"></a> |
| <FONT color="green">069</FONT> * using an XPath expression passed as a string as the second argument. <a name="line.69"></a> |
| <FONT color="green">070</FONT> * <p><a name="line.70"></a> |
| <FONT color="green">071</FONT> * The expressions are evaluated relative to the nodes passed as the first argument.<a name="line.71"></a> |
| <FONT color="green">072</FONT> * In other words, the value for each node is calculated by evaluating the XPath <a name="line.72"></a> |
| <FONT color="green">073</FONT> * expression with all context information being the same as that for the call to <a name="line.73"></a> |
| <FONT color="green">074</FONT> * the dyn:max function itself, except for the following:<a name="line.74"></a> |
| <FONT color="green">075</FONT> * <p><a name="line.75"></a> |
| <FONT color="green">076</FONT> * <ul><a name="line.76"></a> |
| <FONT color="green">077</FONT> * <li>the context node is the node whose value is being calculated.</li><a name="line.77"></a> |
| <FONT color="green">078</FONT> * <li>the context position is the position of the node within the node set passed as <a name="line.78"></a> |
| <FONT color="green">079</FONT> * the first argument to the dyn:max function, arranged in document order.</li><a name="line.79"></a> |
| <FONT color="green">080</FONT> * <li>the context size is the number of nodes passed as the first argument to the <a name="line.80"></a> |
| <FONT color="green">081</FONT> * dyn:max function.</li><a name="line.81"></a> |
| <FONT color="green">082</FONT> * </ul><a name="line.82"></a> |
| <FONT color="green">083</FONT> * <p><a name="line.83"></a> |
| <FONT color="green">084</FONT> * The dyn:max function returns the maximum of these values, calculated in exactly <a name="line.84"></a> |
| <FONT color="green">085</FONT> * the same way as for math:max. <a name="line.85"></a> |
| <FONT color="green">086</FONT> * <p><a name="line.86"></a> |
| <FONT color="green">087</FONT> * If the expression string passed as the second argument is an invalid XPath <a name="line.87"></a> |
| <FONT color="green">088</FONT> * expression (including an empty string), this function returns NaN. <a name="line.88"></a> |
| <FONT color="green">089</FONT> * <p><a name="line.89"></a> |
| <FONT color="green">090</FONT> * This function must take a second argument. To calculate the maximum of a set of <a name="line.90"></a> |
| <FONT color="green">091</FONT> * nodes based on their string values, you should use the math:max function.<a name="line.91"></a> |
| <FONT color="green">092</FONT> *<a name="line.92"></a> |
| <FONT color="green">093</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.93"></a> |
| <FONT color="green">094</FONT> * @param nl The node set<a name="line.94"></a> |
| <FONT color="green">095</FONT> * @param expr The expression string<a name="line.95"></a> |
| <FONT color="green">096</FONT> *<a name="line.96"></a> |
| <FONT color="green">097</FONT> * @return The maximum evaluation value<a name="line.97"></a> |
| <FONT color="green">098</FONT> */<a name="line.98"></a> |
| <FONT color="green">099</FONT> public static double max(ExpressionContext myContext, NodeList nl, String expr)<a name="line.99"></a> |
| <FONT color="green">100</FONT> throws SAXNotSupportedException<a name="line.100"></a> |
| <FONT color="green">101</FONT> {<a name="line.101"></a> |
| <FONT color="green">102</FONT> <a name="line.102"></a> |
| <FONT color="green">103</FONT> XPathContext xctxt = null;<a name="line.103"></a> |
| <FONT color="green">104</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.104"></a> |
| <FONT color="green">105</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.105"></a> |
| <FONT color="green">106</FONT> else<a name="line.106"></a> |
| <FONT color="green">107</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));<a name="line.107"></a> |
| <FONT color="green">108</FONT> <a name="line.108"></a> |
| <FONT color="green">109</FONT> if (expr == null || expr.length() == 0)<a name="line.109"></a> |
| <FONT color="green">110</FONT> return Double.NaN;<a name="line.110"></a> |
| <FONT color="green">111</FONT> <a name="line.111"></a> |
| <FONT color="green">112</FONT> NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);<a name="line.112"></a> |
| <FONT color="green">113</FONT> xctxt.pushContextNodeList(contextNodes);<a name="line.113"></a> |
| <FONT color="green">114</FONT> <a name="line.114"></a> |
| <FONT color="green">115</FONT> double maxValue = - Double.MAX_VALUE;<a name="line.115"></a> |
| <FONT color="green">116</FONT> for (int i = 0; i < contextNodes.getLength(); i++)<a name="line.116"></a> |
| <FONT color="green">117</FONT> {<a name="line.117"></a> |
| <FONT color="green">118</FONT> int contextNode = contextNodes.item(i);<a name="line.118"></a> |
| <FONT color="green">119</FONT> xctxt.pushCurrentNode(contextNode);<a name="line.119"></a> |
| <FONT color="green">120</FONT> <a name="line.120"></a> |
| <FONT color="green">121</FONT> double result = 0;<a name="line.121"></a> |
| <FONT color="green">122</FONT> try<a name="line.122"></a> |
| <FONT color="green">123</FONT> {<a name="line.123"></a> |
| <FONT color="green">124</FONT> XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),<a name="line.124"></a> |
| <FONT color="green">125</FONT> xctxt.getNamespaceContext(),<a name="line.125"></a> |
| <FONT color="green">126</FONT> XPath.SELECT);<a name="line.126"></a> |
| <FONT color="green">127</FONT> result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();<a name="line.127"></a> |
| <FONT color="green">128</FONT> }<a name="line.128"></a> |
| <FONT color="green">129</FONT> catch (TransformerException e)<a name="line.129"></a> |
| <FONT color="green">130</FONT> {<a name="line.130"></a> |
| <FONT color="green">131</FONT> xctxt.popCurrentNode();<a name="line.131"></a> |
| <FONT color="green">132</FONT> xctxt.popContextNodeList();<a name="line.132"></a> |
| <FONT color="green">133</FONT> return Double.NaN;<a name="line.133"></a> |
| <FONT color="green">134</FONT> }<a name="line.134"></a> |
| <FONT color="green">135</FONT> <a name="line.135"></a> |
| <FONT color="green">136</FONT> xctxt.popCurrentNode();<a name="line.136"></a> |
| <FONT color="green">137</FONT> <a name="line.137"></a> |
| <FONT color="green">138</FONT> if (result > maxValue)<a name="line.138"></a> |
| <FONT color="green">139</FONT> maxValue = result;<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> xctxt.popContextNodeList();<a name="line.142"></a> |
| <FONT color="green">143</FONT> return maxValue;<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> <a name="line.146"></a> |
| <FONT color="green">147</FONT> /**<a name="line.147"></a> |
| <FONT color="green">148</FONT> * The dyn:min function calculates the minimum value for the nodes passed as the <a name="line.148"></a> |
| <FONT color="green">149</FONT> * first argument, where the value of each node is calculated dynamically using <a name="line.149"></a> |
| <FONT color="green">150</FONT> * an XPath expression passed as a string as the second argument. <a name="line.150"></a> |
| <FONT color="green">151</FONT> * <p><a name="line.151"></a> |
| <FONT color="green">152</FONT> * The expressions are evaluated relative to the nodes passed as the first argument. <a name="line.152"></a> |
| <FONT color="green">153</FONT> * In other words, the value for each node is calculated by evaluating the XPath <a name="line.153"></a> |
| <FONT color="green">154</FONT> * expression with all context information being the same as that for the call to <a name="line.154"></a> |
| <FONT color="green">155</FONT> * the dyn:min function itself, except for the following: <a name="line.155"></a> |
| <FONT color="green">156</FONT> * <p><a name="line.156"></a> |
| <FONT color="green">157</FONT> * <ul><a name="line.157"></a> |
| <FONT color="green">158</FONT> * <li>the context node is the node whose value is being calculated.</li><a name="line.158"></a> |
| <FONT color="green">159</FONT> * <li>the context position is the position of the node within the node set passed <a name="line.159"></a> |
| <FONT color="green">160</FONT> * as the first argument to the dyn:min function, arranged in document order.</li><a name="line.160"></a> |
| <FONT color="green">161</FONT> * <li>the context size is the number of nodes passed as the first argument to the <a name="line.161"></a> |
| <FONT color="green">162</FONT> * dyn:min function.</li><a name="line.162"></a> |
| <FONT color="green">163</FONT> * </ul><a name="line.163"></a> |
| <FONT color="green">164</FONT> * <p><a name="line.164"></a> |
| <FONT color="green">165</FONT> * The dyn:min function returns the minimum of these values, calculated in exactly <a name="line.165"></a> |
| <FONT color="green">166</FONT> * the same way as for math:min. <a name="line.166"></a> |
| <FONT color="green">167</FONT> * <p><a name="line.167"></a> |
| <FONT color="green">168</FONT> * If the expression string passed as the second argument is an invalid XPath expression <a name="line.168"></a> |
| <FONT color="green">169</FONT> * (including an empty string), this function returns NaN. <a name="line.169"></a> |
| <FONT color="green">170</FONT> * <p><a name="line.170"></a> |
| <FONT color="green">171</FONT> * This function must take a second argument. To calculate the minimum of a set of <a name="line.171"></a> |
| <FONT color="green">172</FONT> * nodes based on their string values, you should use the math:min function.<a name="line.172"></a> |
| <FONT color="green">173</FONT> *<a name="line.173"></a> |
| <FONT color="green">174</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.174"></a> |
| <FONT color="green">175</FONT> * @param nl The node set<a name="line.175"></a> |
| <FONT color="green">176</FONT> * @param expr The expression string<a name="line.176"></a> |
| <FONT color="green">177</FONT> *<a name="line.177"></a> |
| <FONT color="green">178</FONT> * @return The minimum evaluation value<a name="line.178"></a> |
| <FONT color="green">179</FONT> */<a name="line.179"></a> |
| <FONT color="green">180</FONT> public static double min(ExpressionContext myContext, NodeList nl, String expr)<a name="line.180"></a> |
| <FONT color="green">181</FONT> throws SAXNotSupportedException<a name="line.181"></a> |
| <FONT color="green">182</FONT> {<a name="line.182"></a> |
| <FONT color="green">183</FONT> <a name="line.183"></a> |
| <FONT color="green">184</FONT> XPathContext xctxt = null;<a name="line.184"></a> |
| <FONT color="green">185</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.185"></a> |
| <FONT color="green">186</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.186"></a> |
| <FONT color="green">187</FONT> else<a name="line.187"></a> |
| <FONT color="green">188</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));<a name="line.188"></a> |
| <FONT color="green">189</FONT> <a name="line.189"></a> |
| <FONT color="green">190</FONT> if (expr == null || expr.length() == 0)<a name="line.190"></a> |
| <FONT color="green">191</FONT> return Double.NaN;<a name="line.191"></a> |
| <FONT color="green">192</FONT> <a name="line.192"></a> |
| <FONT color="green">193</FONT> NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);<a name="line.193"></a> |
| <FONT color="green">194</FONT> xctxt.pushContextNodeList(contextNodes);<a name="line.194"></a> |
| <FONT color="green">195</FONT> <a name="line.195"></a> |
| <FONT color="green">196</FONT> double minValue = Double.MAX_VALUE;<a name="line.196"></a> |
| <FONT color="green">197</FONT> for (int i = 0; i < nl.getLength(); i++)<a name="line.197"></a> |
| <FONT color="green">198</FONT> {<a name="line.198"></a> |
| <FONT color="green">199</FONT> int contextNode = contextNodes.item(i);<a name="line.199"></a> |
| <FONT color="green">200</FONT> xctxt.pushCurrentNode(contextNode);<a name="line.200"></a> |
| <FONT color="green">201</FONT> <a name="line.201"></a> |
| <FONT color="green">202</FONT> double result = 0;<a name="line.202"></a> |
| <FONT color="green">203</FONT> try<a name="line.203"></a> |
| <FONT color="green">204</FONT> {<a name="line.204"></a> |
| <FONT color="green">205</FONT> XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),<a name="line.205"></a> |
| <FONT color="green">206</FONT> xctxt.getNamespaceContext(),<a name="line.206"></a> |
| <FONT color="green">207</FONT> XPath.SELECT);<a name="line.207"></a> |
| <FONT color="green">208</FONT> result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();<a name="line.208"></a> |
| <FONT color="green">209</FONT> }<a name="line.209"></a> |
| <FONT color="green">210</FONT> catch (TransformerException e)<a name="line.210"></a> |
| <FONT color="green">211</FONT> {<a name="line.211"></a> |
| <FONT color="green">212</FONT> xctxt.popCurrentNode();<a name="line.212"></a> |
| <FONT color="green">213</FONT> xctxt.popContextNodeList();<a name="line.213"></a> |
| <FONT color="green">214</FONT> return Double.NaN;<a name="line.214"></a> |
| <FONT color="green">215</FONT> }<a name="line.215"></a> |
| <FONT color="green">216</FONT> <a name="line.216"></a> |
| <FONT color="green">217</FONT> xctxt.popCurrentNode();<a name="line.217"></a> |
| <FONT color="green">218</FONT> <a name="line.218"></a> |
| <FONT color="green">219</FONT> if (result < minValue)<a name="line.219"></a> |
| <FONT color="green">220</FONT> minValue = result;<a name="line.220"></a> |
| <FONT color="green">221</FONT> } <a name="line.221"></a> |
| <FONT color="green">222</FONT> <a name="line.222"></a> |
| <FONT color="green">223</FONT> xctxt.popContextNodeList();<a name="line.223"></a> |
| <FONT color="green">224</FONT> return minValue;<a name="line.224"></a> |
| <FONT color="green">225</FONT> <a name="line.225"></a> |
| <FONT color="green">226</FONT> }<a name="line.226"></a> |
| <FONT color="green">227</FONT> <a name="line.227"></a> |
| <FONT color="green">228</FONT> /**<a name="line.228"></a> |
| <FONT color="green">229</FONT> * The dyn:sum function calculates the sum for the nodes passed as the first argument, <a name="line.229"></a> |
| <FONT color="green">230</FONT> * where the value of each node is calculated dynamically using an XPath expression <a name="line.230"></a> |
| <FONT color="green">231</FONT> * passed as a string as the second argument. <a name="line.231"></a> |
| <FONT color="green">232</FONT> * <p><a name="line.232"></a> |
| <FONT color="green">233</FONT> * The expressions are evaluated relative to the nodes passed as the first argument. <a name="line.233"></a> |
| <FONT color="green">234</FONT> * In other words, the value for each node is calculated by evaluating the XPath <a name="line.234"></a> |
| <FONT color="green">235</FONT> * expression with all context information being the same as that for the call to <a name="line.235"></a> |
| <FONT color="green">236</FONT> * the dyn:sum function itself, except for the following: <a name="line.236"></a> |
| <FONT color="green">237</FONT> * <p><a name="line.237"></a> |
| <FONT color="green">238</FONT> * <ul><a name="line.238"></a> |
| <FONT color="green">239</FONT> * <li>the context node is the node whose value is being calculated.</li><a name="line.239"></a> |
| <FONT color="green">240</FONT> * <li>the context position is the position of the node within the node set passed as <a name="line.240"></a> |
| <FONT color="green">241</FONT> * the first argument to the dyn:sum function, arranged in document order.</li><a name="line.241"></a> |
| <FONT color="green">242</FONT> * <li>the context size is the number of nodes passed as the first argument to the <a name="line.242"></a> |
| <FONT color="green">243</FONT> * dyn:sum function.</li><a name="line.243"></a> |
| <FONT color="green">244</FONT> * </ul><a name="line.244"></a> |
| <FONT color="green">245</FONT> * <p><a name="line.245"></a> |
| <FONT color="green">246</FONT> * The dyn:sum function returns the sumimum of these values, calculated in exactly <a name="line.246"></a> |
| <FONT color="green">247</FONT> * the same way as for sum. <a name="line.247"></a> |
| <FONT color="green">248</FONT> * <p><a name="line.248"></a> |
| <FONT color="green">249</FONT> * If the expression string passed as the second argument is an invalid XPath <a name="line.249"></a> |
| <FONT color="green">250</FONT> * expression (including an empty string), this function returns NaN. <a name="line.250"></a> |
| <FONT color="green">251</FONT> * <p><a name="line.251"></a> |
| <FONT color="green">252</FONT> * This function must take a second argument. To calculate the sumimum of a set of <a name="line.252"></a> |
| <FONT color="green">253</FONT> * nodes based on their string values, you should use the sum function.<a name="line.253"></a> |
| <FONT color="green">254</FONT> *<a name="line.254"></a> |
| <FONT color="green">255</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.255"></a> |
| <FONT color="green">256</FONT> * @param nl The node set<a name="line.256"></a> |
| <FONT color="green">257</FONT> * @param expr The expression string<a name="line.257"></a> |
| <FONT color="green">258</FONT> *<a name="line.258"></a> |
| <FONT color="green">259</FONT> * @return The sum of the evaluation value on each node<a name="line.259"></a> |
| <FONT color="green">260</FONT> */<a name="line.260"></a> |
| <FONT color="green">261</FONT> public static double sum(ExpressionContext myContext, NodeList nl, String expr)<a name="line.261"></a> |
| <FONT color="green">262</FONT> throws SAXNotSupportedException<a name="line.262"></a> |
| <FONT color="green">263</FONT> {<a name="line.263"></a> |
| <FONT color="green">264</FONT> XPathContext xctxt = null;<a name="line.264"></a> |
| <FONT color="green">265</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.265"></a> |
| <FONT color="green">266</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.266"></a> |
| <FONT color="green">267</FONT> else<a name="line.267"></a> |
| <FONT color="green">268</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));<a name="line.268"></a> |
| <FONT color="green">269</FONT> <a name="line.269"></a> |
| <FONT color="green">270</FONT> if (expr == null || expr.length() == 0)<a name="line.270"></a> |
| <FONT color="green">271</FONT> return Double.NaN;<a name="line.271"></a> |
| <FONT color="green">272</FONT> <a name="line.272"></a> |
| <FONT color="green">273</FONT> NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);<a name="line.273"></a> |
| <FONT color="green">274</FONT> xctxt.pushContextNodeList(contextNodes);<a name="line.274"></a> |
| <FONT color="green">275</FONT> <a name="line.275"></a> |
| <FONT color="green">276</FONT> double sum = 0;<a name="line.276"></a> |
| <FONT color="green">277</FONT> for (int i = 0; i < nl.getLength(); i++)<a name="line.277"></a> |
| <FONT color="green">278</FONT> {<a name="line.278"></a> |
| <FONT color="green">279</FONT> int contextNode = contextNodes.item(i);<a name="line.279"></a> |
| <FONT color="green">280</FONT> xctxt.pushCurrentNode(contextNode);<a name="line.280"></a> |
| <FONT color="green">281</FONT> <a name="line.281"></a> |
| <FONT color="green">282</FONT> double result = 0;<a name="line.282"></a> |
| <FONT color="green">283</FONT> try<a name="line.283"></a> |
| <FONT color="green">284</FONT> {<a name="line.284"></a> |
| <FONT color="green">285</FONT> XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),<a name="line.285"></a> |
| <FONT color="green">286</FONT> xctxt.getNamespaceContext(),<a name="line.286"></a> |
| <FONT color="green">287</FONT> XPath.SELECT);<a name="line.287"></a> |
| <FONT color="green">288</FONT> result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();<a name="line.288"></a> |
| <FONT color="green">289</FONT> }<a name="line.289"></a> |
| <FONT color="green">290</FONT> catch (TransformerException e)<a name="line.290"></a> |
| <FONT color="green">291</FONT> {<a name="line.291"></a> |
| <FONT color="green">292</FONT> xctxt.popCurrentNode();<a name="line.292"></a> |
| <FONT color="green">293</FONT> xctxt.popContextNodeList();<a name="line.293"></a> |
| <FONT color="green">294</FONT> return Double.NaN;<a name="line.294"></a> |
| <FONT color="green">295</FONT> }<a name="line.295"></a> |
| <FONT color="green">296</FONT> <a name="line.296"></a> |
| <FONT color="green">297</FONT> xctxt.popCurrentNode();<a name="line.297"></a> |
| <FONT color="green">298</FONT> <a name="line.298"></a> |
| <FONT color="green">299</FONT> sum = sum + result;<a name="line.299"></a> |
| <FONT color="green">300</FONT> <a name="line.300"></a> |
| <FONT color="green">301</FONT> } <a name="line.301"></a> |
| <FONT color="green">302</FONT> <a name="line.302"></a> |
| <FONT color="green">303</FONT> xctxt.popContextNodeList();<a name="line.303"></a> |
| <FONT color="green">304</FONT> return sum;<a name="line.304"></a> |
| <FONT color="green">305</FONT> }<a name="line.305"></a> |
| <FONT color="green">306</FONT> <a name="line.306"></a> |
| <FONT color="green">307</FONT> /**<a name="line.307"></a> |
| <FONT color="green">308</FONT> * The dyn:map function evaluates the expression passed as the second argument for <a name="line.308"></a> |
| <FONT color="green">309</FONT> * each of the nodes passed as the first argument, and returns a node set of those values. <a name="line.309"></a> |
| <FONT color="green">310</FONT> * <p><a name="line.310"></a> |
| <FONT color="green">311</FONT> * The expressions are evaluated relative to the nodes passed as the first argument. <a name="line.311"></a> |
| <FONT color="green">312</FONT> * In other words, the value for each node is calculated by evaluating the XPath <a name="line.312"></a> |
| <FONT color="green">313</FONT> * expression with all context information being the same as that for the call to <a name="line.313"></a> |
| <FONT color="green">314</FONT> * the dyn:map function itself, except for the following:<a name="line.314"></a> |
| <FONT color="green">315</FONT> * <p><a name="line.315"></a> |
| <FONT color="green">316</FONT> * <ul><a name="line.316"></a> |
| <FONT color="green">317</FONT> * <li>The context node is the node whose value is being calculated.</li><a name="line.317"></a> |
| <FONT color="green">318</FONT> * <li>the context position is the position of the node within the node set passed<a name="line.318"></a> |
| <FONT color="green">319</FONT> * as the first argument to the dyn:map function, arranged in document order.</li><a name="line.319"></a> |
| <FONT color="green">320</FONT> * <li>the context size is the number of nodes passed as the first argument to the <a name="line.320"></a> |
| <FONT color="green">321</FONT> * dyn:map function.</li><a name="line.321"></a> |
| <FONT color="green">322</FONT> * </ul><a name="line.322"></a> |
| <FONT color="green">323</FONT> * <p><a name="line.323"></a> |
| <FONT color="green">324</FONT> * If the expression string passed as the second argument is an invalid XPath <a name="line.324"></a> |
| <FONT color="green">325</FONT> * expression (including an empty string), this function returns an empty node set. <a name="line.325"></a> |
| <FONT color="green">326</FONT> * <p><a name="line.326"></a> |
| <FONT color="green">327</FONT> * If the XPath expression evaluates as a node set, the dyn:map function returns <a name="line.327"></a> |
| <FONT color="green">328</FONT> * the union of the node sets returned by evaluating the expression for each of the <a name="line.328"></a> |
| <FONT color="green">329</FONT> * nodes in the first argument. Note that this may mean that the node set resulting <a name="line.329"></a> |
| <FONT color="green">330</FONT> * from the call to the dyn:map function contains a different number of nodes from <a name="line.330"></a> |
| <FONT color="green">331</FONT> * the number in the node set passed as the first argument to the function. <a name="line.331"></a> |
| <FONT color="green">332</FONT> * <p><a name="line.332"></a> |
| <FONT color="green">333</FONT> * If the XPath expression evaluates as a number, the dyn:map function returns a <a name="line.333"></a> |
| <FONT color="green">334</FONT> * node set containing one exsl:number element (namespace http://exslt.org/common) <a name="line.334"></a> |
| <FONT color="green">335</FONT> * for each node in the node set passed as the first argument to the dyn:map function, <a name="line.335"></a> |
| <FONT color="green">336</FONT> * in document order. The string value of each exsl:number element is the same as <a name="line.336"></a> |
| <FONT color="green">337</FONT> * the result of converting the number resulting from evaluating the expression to <a name="line.337"></a> |
| <FONT color="green">338</FONT> * a string as with the number function, with the exception that Infinity results <a name="line.338"></a> |
| <FONT color="green">339</FONT> * in an exsl:number holding the highest number the implementation can store, and <a name="line.339"></a> |
| <FONT color="green">340</FONT> * -Infinity results in an exsl:number holding the lowest number the implementation <a name="line.340"></a> |
| <FONT color="green">341</FONT> * can store. <a name="line.341"></a> |
| <FONT color="green">342</FONT> * <p><a name="line.342"></a> |
| <FONT color="green">343</FONT> * If the XPath expression evaluates as a boolean, the dyn:map function returns a <a name="line.343"></a> |
| <FONT color="green">344</FONT> * node set containing one exsl:boolean element (namespace http://exslt.org/common) <a name="line.344"></a> |
| <FONT color="green">345</FONT> * for each node in the node set passed as the first argument to the dyn:map function, <a name="line.345"></a> |
| <FONT color="green">346</FONT> * in document order. The string value of each exsl:boolean element is 'true' if the <a name="line.346"></a> |
| <FONT color="green">347</FONT> * expression evaluates as true for the node, and '' if the expression evaluates as <a name="line.347"></a> |
| <FONT color="green">348</FONT> * false. <a name="line.348"></a> |
| <FONT color="green">349</FONT> * <p><a name="line.349"></a> |
| <FONT color="green">350</FONT> * Otherwise, the dyn:map function returns a node set containing one exsl:string <a name="line.350"></a> |
| <FONT color="green">351</FONT> * element (namespace http://exslt.org/common) for each node in the node set passed <a name="line.351"></a> |
| <FONT color="green">352</FONT> * as the first argument to the dyn:map function, in document order. The string <a name="line.352"></a> |
| <FONT color="green">353</FONT> * value of each exsl:string element is the same as the result of converting the <a name="line.353"></a> |
| <FONT color="green">354</FONT> * result of evaluating the expression for the relevant node to a string as with <a name="line.354"></a> |
| <FONT color="green">355</FONT> * the string function.<a name="line.355"></a> |
| <FONT color="green">356</FONT> *<a name="line.356"></a> |
| <FONT color="green">357</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.357"></a> |
| <FONT color="green">358</FONT> * @param nl The node set<a name="line.358"></a> |
| <FONT color="green">359</FONT> * @param expr The expression string<a name="line.359"></a> |
| <FONT color="green">360</FONT> *<a name="line.360"></a> |
| <FONT color="green">361</FONT> * @return The node set after evaluation<a name="line.361"></a> |
| <FONT color="green">362</FONT> */<a name="line.362"></a> |
| <FONT color="green">363</FONT> public static NodeList map(ExpressionContext myContext, NodeList nl, String expr)<a name="line.363"></a> |
| <FONT color="green">364</FONT> throws SAXNotSupportedException<a name="line.364"></a> |
| <FONT color="green">365</FONT> {<a name="line.365"></a> |
| <FONT color="green">366</FONT> XPathContext xctxt = null;<a name="line.366"></a> |
| <FONT color="green">367</FONT> Document lDoc = null;<a name="line.367"></a> |
| <FONT color="green">368</FONT> <a name="line.368"></a> |
| <FONT color="green">369</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.369"></a> |
| <FONT color="green">370</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.370"></a> |
| <FONT color="green">371</FONT> else<a name="line.371"></a> |
| <FONT color="green">372</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));<a name="line.372"></a> |
| <FONT color="green">373</FONT> <a name="line.373"></a> |
| <FONT color="green">374</FONT> if (expr == null || expr.length() == 0)<a name="line.374"></a> |
| <FONT color="green">375</FONT> return new NodeSet();<a name="line.375"></a> |
| <FONT color="green">376</FONT> <a name="line.376"></a> |
| <FONT color="green">377</FONT> NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);<a name="line.377"></a> |
| <FONT color="green">378</FONT> xctxt.pushContextNodeList(contextNodes);<a name="line.378"></a> |
| <FONT color="green">379</FONT> <a name="line.379"></a> |
| <FONT color="green">380</FONT> NodeSet resultSet = new NodeSet();<a name="line.380"></a> |
| <FONT color="green">381</FONT> resultSet.setShouldCacheNodes(true);<a name="line.381"></a> |
| <FONT color="green">382</FONT> <a name="line.382"></a> |
| <FONT color="green">383</FONT> for (int i = 0; i < nl.getLength(); i++)<a name="line.383"></a> |
| <FONT color="green">384</FONT> {<a name="line.384"></a> |
| <FONT color="green">385</FONT> int contextNode = contextNodes.item(i);<a name="line.385"></a> |
| <FONT color="green">386</FONT> xctxt.pushCurrentNode(contextNode);<a name="line.386"></a> |
| <FONT color="green">387</FONT> <a name="line.387"></a> |
| <FONT color="green">388</FONT> XObject object = null;<a name="line.388"></a> |
| <FONT color="green">389</FONT> try<a name="line.389"></a> |
| <FONT color="green">390</FONT> {<a name="line.390"></a> |
| <FONT color="green">391</FONT> XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),<a name="line.391"></a> |
| <FONT color="green">392</FONT> xctxt.getNamespaceContext(),<a name="line.392"></a> |
| <FONT color="green">393</FONT> XPath.SELECT);<a name="line.393"></a> |
| <FONT color="green">394</FONT> object = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext());<a name="line.394"></a> |
| <FONT color="green">395</FONT> <a name="line.395"></a> |
| <FONT color="green">396</FONT> if (object instanceof XNodeSet)<a name="line.396"></a> |
| <FONT color="green">397</FONT> {<a name="line.397"></a> |
| <FONT color="green">398</FONT> NodeList nodelist = null;<a name="line.398"></a> |
| <FONT color="green">399</FONT> nodelist = ((XNodeSet)object).nodelist();<a name="line.399"></a> |
| <FONT color="green">400</FONT> <a name="line.400"></a> |
| <FONT color="green">401</FONT> for (int k = 0; k < nodelist.getLength(); k++)<a name="line.401"></a> |
| <FONT color="green">402</FONT> {<a name="line.402"></a> |
| <FONT color="green">403</FONT> Node n = nodelist.item(k);<a name="line.403"></a> |
| <FONT color="green">404</FONT> if (!resultSet.contains(n))<a name="line.404"></a> |
| <FONT color="green">405</FONT> resultSet.addNode(n);<a name="line.405"></a> |
| <FONT color="green">406</FONT> }<a name="line.406"></a> |
| <FONT color="green">407</FONT> }<a name="line.407"></a> |
| <FONT color="green">408</FONT> else<a name="line.408"></a> |
| <FONT color="green">409</FONT> {<a name="line.409"></a> |
| <FONT color="green">410</FONT> if (lDoc == null)<a name="line.410"></a> |
| <FONT color="green">411</FONT> {<a name="line.411"></a> |
| <FONT color="green">412</FONT> DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();<a name="line.412"></a> |
| <FONT color="green">413</FONT> dbf.setNamespaceAware(true);<a name="line.413"></a> |
| <FONT color="green">414</FONT> DocumentBuilder db = dbf.newDocumentBuilder();<a name="line.414"></a> |
| <FONT color="green">415</FONT> lDoc = db.newDocument();<a name="line.415"></a> |
| <FONT color="green">416</FONT> }<a name="line.416"></a> |
| <FONT color="green">417</FONT> <a name="line.417"></a> |
| <FONT color="green">418</FONT> Element element = null;<a name="line.418"></a> |
| <FONT color="green">419</FONT> if (object instanceof XNumber)<a name="line.419"></a> |
| <FONT color="green">420</FONT> element = lDoc.createElementNS(EXSL_URI, "exsl:number");<a name="line.420"></a> |
| <FONT color="green">421</FONT> else if (object instanceof XBoolean)<a name="line.421"></a> |
| <FONT color="green">422</FONT> element = lDoc.createElementNS(EXSL_URI, "exsl:boolean");<a name="line.422"></a> |
| <FONT color="green">423</FONT> else<a name="line.423"></a> |
| <FONT color="green">424</FONT> element = lDoc.createElementNS(EXSL_URI, "exsl:string");<a name="line.424"></a> |
| <FONT color="green">425</FONT> <a name="line.425"></a> |
| <FONT color="green">426</FONT> Text textNode = lDoc.createTextNode(object.str());<a name="line.426"></a> |
| <FONT color="green">427</FONT> element.appendChild(textNode);<a name="line.427"></a> |
| <FONT color="green">428</FONT> resultSet.addNode(element);<a name="line.428"></a> |
| <FONT color="green">429</FONT> }<a name="line.429"></a> |
| <FONT color="green">430</FONT> }<a name="line.430"></a> |
| <FONT color="green">431</FONT> catch (Exception e)<a name="line.431"></a> |
| <FONT color="green">432</FONT> {<a name="line.432"></a> |
| <FONT color="green">433</FONT> xctxt.popCurrentNode();<a name="line.433"></a> |
| <FONT color="green">434</FONT> xctxt.popContextNodeList();<a name="line.434"></a> |
| <FONT color="green">435</FONT> return new NodeSet();<a name="line.435"></a> |
| <FONT color="green">436</FONT> }<a name="line.436"></a> |
| <FONT color="green">437</FONT> <a name="line.437"></a> |
| <FONT color="green">438</FONT> xctxt.popCurrentNode();<a name="line.438"></a> |
| <FONT color="green">439</FONT> <a name="line.439"></a> |
| <FONT color="green">440</FONT> } <a name="line.440"></a> |
| <FONT color="green">441</FONT> <a name="line.441"></a> |
| <FONT color="green">442</FONT> xctxt.popContextNodeList();<a name="line.442"></a> |
| <FONT color="green">443</FONT> return resultSet;<a name="line.443"></a> |
| <FONT color="green">444</FONT> }<a name="line.444"></a> |
| <FONT color="green">445</FONT> <a name="line.445"></a> |
| <FONT color="green">446</FONT> /**<a name="line.446"></a> |
| <FONT color="green">447</FONT> * The dyn:evaluate function evaluates a string as an XPath expression and returns <a name="line.447"></a> |
| <FONT color="green">448</FONT> * the resulting value, which might be a boolean, number, string, node set, result <a name="line.448"></a> |
| <FONT color="green">449</FONT> * tree fragment or external object. The sole argument is the string to be evaluated.<a name="line.449"></a> |
| <FONT color="green">450</FONT> * <p><a name="line.450"></a> |
| <FONT color="green">451</FONT> * If the expression string passed as the second argument is an invalid XPath <a name="line.451"></a> |
| <FONT color="green">452</FONT> * expression (including an empty string), this function returns an empty node set. <a name="line.452"></a> |
| <FONT color="green">453</FONT> * <p><a name="line.453"></a> |
| <FONT color="green">454</FONT> * You should only use this function if the expression must be constructed dynamically, <a name="line.454"></a> |
| <FONT color="green">455</FONT> * otherwise it is much more efficient to use the expression literally.<a name="line.455"></a> |
| <FONT color="green">456</FONT> *<a name="line.456"></a> |
| <FONT color="green">457</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.457"></a> |
| <FONT color="green">458</FONT> * @param xpathExpr The XPath expression string<a name="line.458"></a> |
| <FONT color="green">459</FONT> *<a name="line.459"></a> |
| <FONT color="green">460</FONT> * @return The evaluation result <a name="line.460"></a> |
| <FONT color="green">461</FONT> */<a name="line.461"></a> |
| <FONT color="green">462</FONT> public static XObject evaluate(ExpressionContext myContext, String xpathExpr)<a name="line.462"></a> |
| <FONT color="green">463</FONT> throws SAXNotSupportedException<a name="line.463"></a> |
| <FONT color="green">464</FONT> {<a name="line.464"></a> |
| <FONT color="green">465</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.465"></a> |
| <FONT color="green">466</FONT> {<a name="line.466"></a> |
| <FONT color="green">467</FONT> XPathContext xctxt = null;<a name="line.467"></a> |
| <FONT color="green">468</FONT> try<a name="line.468"></a> |
| <FONT color="green">469</FONT> {<a name="line.469"></a> |
| <FONT color="green">470</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.470"></a> |
| <FONT color="green">471</FONT> XPath dynamicXPath = new XPath(xpathExpr, xctxt.getSAXLocator(),<a name="line.471"></a> |
| <FONT color="green">472</FONT> xctxt.getNamespaceContext(),<a name="line.472"></a> |
| <FONT color="green">473</FONT> XPath.SELECT);<a name="line.473"></a> |
| <FONT color="green">474</FONT> <a name="line.474"></a> |
| <FONT color="green">475</FONT> return dynamicXPath.execute(xctxt, myContext.getContextNode(),<a name="line.475"></a> |
| <FONT color="green">476</FONT> xctxt.getNamespaceContext());<a name="line.476"></a> |
| <FONT color="green">477</FONT> }<a name="line.477"></a> |
| <FONT color="green">478</FONT> catch (TransformerException e)<a name="line.478"></a> |
| <FONT color="green">479</FONT> {<a name="line.479"></a> |
| <FONT color="green">480</FONT> return new XNodeSet(xctxt.getDTMManager());<a name="line.480"></a> |
| <FONT color="green">481</FONT> }<a name="line.481"></a> |
| <FONT color="green">482</FONT> }<a name="line.482"></a> |
| <FONT color="green">483</FONT> else<a name="line.483"></a> |
| <FONT color="green">484</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext })); //"Invalid context passed to evaluate "<a name="line.484"></a> |
| <FONT color="green">485</FONT> }<a name="line.485"></a> |
| <FONT color="green">486</FONT> <a name="line.486"></a> |
| <FONT color="green">487</FONT> /**<a name="line.487"></a> |
| <FONT color="green">488</FONT> * The dyn:closure function creates a node set resulting from transitive closure of <a name="line.488"></a> |
| <FONT color="green">489</FONT> * evaluating the expression passed as the second argument on each of the nodes passed <a name="line.489"></a> |
| <FONT color="green">490</FONT> * as the first argument, then on the node set resulting from that and so on until no <a name="line.490"></a> |
| <FONT color="green">491</FONT> * more nodes are found. For example: <a name="line.491"></a> |
| <FONT color="green">492</FONT> * <pre><a name="line.492"></a> |
| <FONT color="green">493</FONT> * dyn:closure(., '*')<a name="line.493"></a> |
| <FONT color="green">494</FONT> * </pre><a name="line.494"></a> |
| <FONT color="green">495</FONT> * returns all the descendant elements of the node (its element children, their <a name="line.495"></a> |
| <FONT color="green">496</FONT> * children, their children's children and so on). <a name="line.496"></a> |
| <FONT color="green">497</FONT> * <p><a name="line.497"></a> |
| <FONT color="green">498</FONT> * The expression is thus evaluated several times, each with a different node set <a name="line.498"></a> |
| <FONT color="green">499</FONT> * acting as the context of the expression. The first time the expression is <a name="line.499"></a> |
| <FONT color="green">500</FONT> * evaluated, the context node set is the first argument passed to the dyn:closure <a name="line.500"></a> |
| <FONT color="green">501</FONT> * function. In other words, the node set for each node is calculated by evaluating <a name="line.501"></a> |
| <FONT color="green">502</FONT> * the XPath expression with all context information being the same as that for <a name="line.502"></a> |
| <FONT color="green">503</FONT> * the call to the dyn:closure function itself, except for the following:<a name="line.503"></a> |
| <FONT color="green">504</FONT> * <p><a name="line.504"></a> |
| <FONT color="green">505</FONT> * <ul><a name="line.505"></a> |
| <FONT color="green">506</FONT> * <li>the context node is the node whose value is being calculated.</li><a name="line.506"></a> |
| <FONT color="green">507</FONT> * <li>the context position is the position of the node within the node set passed <a name="line.507"></a> |
| <FONT color="green">508</FONT> * as the first argument to the dyn:closure function, arranged in document order.</li><a name="line.508"></a> |
| <FONT color="green">509</FONT> * <li>the context size is the number of nodes passed as the first argument to the <a name="line.509"></a> |
| <FONT color="green">510</FONT> * dyn:closure function.</li><a name="line.510"></a> |
| <FONT color="green">511</FONT> * <li>the current node is the node whose value is being calculated.</li><a name="line.511"></a> |
| <FONT color="green">512</FONT> * </ul><a name="line.512"></a> |
| <FONT color="green">513</FONT> * <p><a name="line.513"></a> |
| <FONT color="green">514</FONT> * The result for a particular iteration is the union of the node sets resulting <a name="line.514"></a> |
| <FONT color="green">515</FONT> * from evaluting the expression for each of the nodes in the source node set for <a name="line.515"></a> |
| <FONT color="green">516</FONT> * that iteration. This result is then used as the source node set for the next <a name="line.516"></a> |
| <FONT color="green">517</FONT> * iteration, and so on. The result of the function as a whole is the union of <a name="line.517"></a> |
| <FONT color="green">518</FONT> * the node sets generated by each iteration. <a name="line.518"></a> |
| <FONT color="green">519</FONT> * <p><a name="line.519"></a> |
| <FONT color="green">520</FONT> * If the expression string passed as the second argument is an invalid XPath <a name="line.520"></a> |
| <FONT color="green">521</FONT> * expression (including an empty string) or an expression that does not return a <a name="line.521"></a> |
| <FONT color="green">522</FONT> * node set, this function returns an empty node set.<a name="line.522"></a> |
| <FONT color="green">523</FONT> *<a name="line.523"></a> |
| <FONT color="green">524</FONT> * @param myContext The ExpressionContext passed by the extension processor<a name="line.524"></a> |
| <FONT color="green">525</FONT> * @param nl The node set<a name="line.525"></a> |
| <FONT color="green">526</FONT> * @param expr The expression string<a name="line.526"></a> |
| <FONT color="green">527</FONT> *<a name="line.527"></a> |
| <FONT color="green">528</FONT> * @return The node set after evaluation<a name="line.528"></a> |
| <FONT color="green">529</FONT> */<a name="line.529"></a> |
| <FONT color="green">530</FONT> public static NodeList closure(ExpressionContext myContext, NodeList nl, String expr)<a name="line.530"></a> |
| <FONT color="green">531</FONT> throws SAXNotSupportedException<a name="line.531"></a> |
| <FONT color="green">532</FONT> {<a name="line.532"></a> |
| <FONT color="green">533</FONT> XPathContext xctxt = null;<a name="line.533"></a> |
| <FONT color="green">534</FONT> if (myContext instanceof XPathContext.XPathExpressionContext)<a name="line.534"></a> |
| <FONT color="green">535</FONT> xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();<a name="line.535"></a> |
| <FONT color="green">536</FONT> else<a name="line.536"></a> |
| <FONT color="green">537</FONT> throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));<a name="line.537"></a> |
| <FONT color="green">538</FONT> <a name="line.538"></a> |
| <FONT color="green">539</FONT> if (expr == null || expr.length() == 0)<a name="line.539"></a> |
| <FONT color="green">540</FONT> return new NodeSet();<a name="line.540"></a> |
| <FONT color="green">541</FONT> <a name="line.541"></a> |
| <FONT color="green">542</FONT> NodeSet closureSet = new NodeSet();<a name="line.542"></a> |
| <FONT color="green">543</FONT> closureSet.setShouldCacheNodes(true);<a name="line.543"></a> |
| <FONT color="green">544</FONT> <a name="line.544"></a> |
| <FONT color="green">545</FONT> NodeList iterationList = nl;<a name="line.545"></a> |
| <FONT color="green">546</FONT> do<a name="line.546"></a> |
| <FONT color="green">547</FONT> {<a name="line.547"></a> |
| <FONT color="green">548</FONT> <a name="line.548"></a> |
| <FONT color="green">549</FONT> NodeSet iterationSet = new NodeSet();<a name="line.549"></a> |
| <FONT color="green">550</FONT> <a name="line.550"></a> |
| <FONT color="green">551</FONT> NodeSetDTM contextNodes = new NodeSetDTM(iterationList, xctxt);<a name="line.551"></a> |
| <FONT color="green">552</FONT> xctxt.pushContextNodeList(contextNodes);<a name="line.552"></a> |
| <FONT color="green">553</FONT> <a name="line.553"></a> |
| <FONT color="green">554</FONT> for (int i = 0; i < iterationList.getLength(); i++)<a name="line.554"></a> |
| <FONT color="green">555</FONT> {<a name="line.555"></a> |
| <FONT color="green">556</FONT> int contextNode = contextNodes.item(i);<a name="line.556"></a> |
| <FONT color="green">557</FONT> xctxt.pushCurrentNode(contextNode);<a name="line.557"></a> |
| <FONT color="green">558</FONT> <a name="line.558"></a> |
| <FONT color="green">559</FONT> XObject object = null;<a name="line.559"></a> |
| <FONT color="green">560</FONT> try<a name="line.560"></a> |
| <FONT color="green">561</FONT> {<a name="line.561"></a> |
| <FONT color="green">562</FONT> XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),<a name="line.562"></a> |
| <FONT color="green">563</FONT> xctxt.getNamespaceContext(),<a name="line.563"></a> |
| <FONT color="green">564</FONT> XPath.SELECT);<a name="line.564"></a> |
| <FONT color="green">565</FONT> object = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext());<a name="line.565"></a> |
| <FONT color="green">566</FONT> <a name="line.566"></a> |
| <FONT color="green">567</FONT> if (object instanceof XNodeSet)<a name="line.567"></a> |
| <FONT color="green">568</FONT> {<a name="line.568"></a> |
| <FONT color="green">569</FONT> NodeList nodelist = null;<a name="line.569"></a> |
| <FONT color="green">570</FONT> nodelist = ((XNodeSet)object).nodelist();<a name="line.570"></a> |
| <FONT color="green">571</FONT> <a name="line.571"></a> |
| <FONT color="green">572</FONT> for (int k = 0; k < nodelist.getLength(); k++)<a name="line.572"></a> |
| <FONT color="green">573</FONT> {<a name="line.573"></a> |
| <FONT color="green">574</FONT> Node n = nodelist.item(k);<a name="line.574"></a> |
| <FONT color="green">575</FONT> if (!iterationSet.contains(n))<a name="line.575"></a> |
| <FONT color="green">576</FONT> iterationSet.addNode(n);<a name="line.576"></a> |
| <FONT color="green">577</FONT> } <a name="line.577"></a> |
| <FONT color="green">578</FONT> }<a name="line.578"></a> |
| <FONT color="green">579</FONT> else<a name="line.579"></a> |
| <FONT color="green">580</FONT> {<a name="line.580"></a> |
| <FONT color="green">581</FONT> xctxt.popCurrentNode();<a name="line.581"></a> |
| <FONT color="green">582</FONT> xctxt.popContextNodeList();<a name="line.582"></a> |
| <FONT color="green">583</FONT> return new NodeSet();<a name="line.583"></a> |
| <FONT color="green">584</FONT> } <a name="line.584"></a> |
| <FONT color="green">585</FONT> }<a name="line.585"></a> |
| <FONT color="green">586</FONT> catch (TransformerException e)<a name="line.586"></a> |
| <FONT color="green">587</FONT> {<a name="line.587"></a> |
| <FONT color="green">588</FONT> xctxt.popCurrentNode();<a name="line.588"></a> |
| <FONT color="green">589</FONT> xctxt.popContextNodeList();<a name="line.589"></a> |
| <FONT color="green">590</FONT> return new NodeSet();<a name="line.590"></a> |
| <FONT color="green">591</FONT> }<a name="line.591"></a> |
| <FONT color="green">592</FONT> <a name="line.592"></a> |
| <FONT color="green">593</FONT> xctxt.popCurrentNode();<a name="line.593"></a> |
| <FONT color="green">594</FONT> <a name="line.594"></a> |
| <FONT color="green">595</FONT> }<a name="line.595"></a> |
| <FONT color="green">596</FONT> <a name="line.596"></a> |
| <FONT color="green">597</FONT> xctxt.popContextNodeList();<a name="line.597"></a> |
| <FONT color="green">598</FONT> <a name="line.598"></a> |
| <FONT color="green">599</FONT> iterationList = iterationSet;<a name="line.599"></a> |
| <FONT color="green">600</FONT> <a name="line.600"></a> |
| <FONT color="green">601</FONT> for (int i = 0; i < iterationList.getLength(); i++)<a name="line.601"></a> |
| <FONT color="green">602</FONT> {<a name="line.602"></a> |
| <FONT color="green">603</FONT> Node n = iterationList.item(i);<a name="line.603"></a> |
| <FONT color="green">604</FONT> if (!closureSet.contains(n))<a name="line.604"></a> |
| <FONT color="green">605</FONT> closureSet.addNode(n);<a name="line.605"></a> |
| <FONT color="green">606</FONT> }<a name="line.606"></a> |
| <FONT color="green">607</FONT> <a name="line.607"></a> |
| <FONT color="green">608</FONT> } while(iterationList.getLength() > 0);<a name="line.608"></a> |
| <FONT color="green">609</FONT> <a name="line.609"></a> |
| <FONT color="green">610</FONT> return closureSet;<a name="line.610"></a> |
| <FONT color="green">611</FONT> <a name="line.611"></a> |
| <FONT color="green">612</FONT> }<a name="line.612"></a> |
| <FONT color="green">613</FONT> <a name="line.613"></a> |
| <FONT color="green">614</FONT> }<a name="line.614"></a> |
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| </PRE> |
| </BODY> |
| </HTML> |
