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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: FuncExtFunction.java 468655 2006-10-28 07:12:06Z minchau $<a name="line.19"></a>
<FONT color="green">020</FONT>     */<a name="line.20"></a>
<FONT color="green">021</FONT>    package org.apache.xpath.functions;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.Vector;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import org.apache.xalan.res.XSLMessages;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.xpath.Expression;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.xpath.ExpressionNode;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.xpath.ExpressionOwner;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.xpath.ExtensionsProvider;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.xpath.XPathContext;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.xpath.XPathVisitor;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.xpath.objects.XNull;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.xpath.objects.XObject;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.xpath.res.XPATHErrorResources;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.xpath.res.XPATHMessages;<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>    /**<a name="line.37"></a>
<FONT color="green">038</FONT>     * An object of this class represents an extension call expression.  When<a name="line.38"></a>
<FONT color="green">039</FONT>     * the expression executes, it calls ExtensionsTable#extFunction, and then<a name="line.39"></a>
<FONT color="green">040</FONT>     * converts the result to the appropriate XObject.<a name="line.40"></a>
<FONT color="green">041</FONT>     * @xsl.usage advanced<a name="line.41"></a>
<FONT color="green">042</FONT>     */<a name="line.42"></a>
<FONT color="green">043</FONT>    public class FuncExtFunction extends Function<a name="line.43"></a>
<FONT color="green">044</FONT>    {<a name="line.44"></a>
<FONT color="green">045</FONT>        static final long serialVersionUID = 5196115554693708718L;<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>       * The namespace for the extension function, which should not normally<a name="line.48"></a>
<FONT color="green">049</FONT>       *  be null or empty.<a name="line.49"></a>
<FONT color="green">050</FONT>       *  @serial    <a name="line.50"></a>
<FONT color="green">051</FONT>       */<a name="line.51"></a>
<FONT color="green">052</FONT>      String m_namespace;<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>       * The local name of the extension.<a name="line.55"></a>
<FONT color="green">056</FONT>       *  @serial   <a name="line.56"></a>
<FONT color="green">057</FONT>       */<a name="line.57"></a>
<FONT color="green">058</FONT>      String m_extensionName;<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>      /**<a name="line.60"></a>
<FONT color="green">061</FONT>       * Unique method key, which is passed to ExtensionsTable#extFunction in<a name="line.61"></a>
<FONT color="green">062</FONT>       *  order to allow caching of the method.<a name="line.62"></a>
<FONT color="green">063</FONT>       *  @serial <a name="line.63"></a>
<FONT color="green">064</FONT>       */<a name="line.64"></a>
<FONT color="green">065</FONT>      Object m_methodKey;<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>       * Array of static expressions which represent the parameters to the<a name="line.68"></a>
<FONT color="green">069</FONT>       *  function.<a name="line.69"></a>
<FONT color="green">070</FONT>       *  @serial   <a name="line.70"></a>
<FONT color="green">071</FONT>       */<a name="line.71"></a>
<FONT color="green">072</FONT>      Vector m_argVec = new Vector();<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>      /**<a name="line.74"></a>
<FONT color="green">075</FONT>       * This function is used to fixup variables from QNames to stack frame<a name="line.75"></a>
<FONT color="green">076</FONT>       * indexes at stylesheet build time.<a name="line.76"></a>
<FONT color="green">077</FONT>       * @param vars List of QNames that correspond to variables.  This list<a name="line.77"></a>
<FONT color="green">078</FONT>       * should be searched backwards for the first qualified name that<a name="line.78"></a>
<FONT color="green">079</FONT>       * corresponds to the variable reference qname.  The position of the<a name="line.79"></a>
<FONT color="green">080</FONT>       * QName in the vector from the start of the vector will be its position<a name="line.80"></a>
<FONT color="green">081</FONT>       * in the stack frame (but variables above the globalsTop value will need<a name="line.81"></a>
<FONT color="green">082</FONT>       * to be offset to the current stack frame).<a name="line.82"></a>
<FONT color="green">083</FONT>       * NEEDSDOC @param globalsSize<a name="line.83"></a>
<FONT color="green">084</FONT>       */<a name="line.84"></a>
<FONT color="green">085</FONT>      public void fixupVariables(java.util.Vector vars, int globalsSize)<a name="line.85"></a>
<FONT color="green">086</FONT>      {<a name="line.86"></a>
<FONT color="green">087</FONT>    <a name="line.87"></a>
<FONT color="green">088</FONT>        if (null != m_argVec)<a name="line.88"></a>
<FONT color="green">089</FONT>        {<a name="line.89"></a>
<FONT color="green">090</FONT>          int nArgs = m_argVec.size();<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>          for (int i = 0; i &lt; nArgs; i++)<a name="line.92"></a>
<FONT color="green">093</FONT>          {<a name="line.93"></a>
<FONT color="green">094</FONT>            Expression arg = (Expression) m_argVec.elementAt(i);<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>            arg.fixupVariables(vars, globalsSize);<a name="line.96"></a>
<FONT color="green">097</FONT>          }<a name="line.97"></a>
<FONT color="green">098</FONT>        }<a name="line.98"></a>
<FONT color="green">099</FONT>      }<a name="line.99"></a>
<FONT color="green">100</FONT>      <a name="line.100"></a>
<FONT color="green">101</FONT>      /**<a name="line.101"></a>
<FONT color="green">102</FONT>       * Return the namespace of the extension function.<a name="line.102"></a>
<FONT color="green">103</FONT>       *<a name="line.103"></a>
<FONT color="green">104</FONT>       * @return The namespace of the extension function.<a name="line.104"></a>
<FONT color="green">105</FONT>       */<a name="line.105"></a>
<FONT color="green">106</FONT>      public String getNamespace()<a name="line.106"></a>
<FONT color="green">107</FONT>      {<a name="line.107"></a>
<FONT color="green">108</FONT>        return m_namespace;<a name="line.108"></a>
<FONT color="green">109</FONT>      }<a name="line.109"></a>
<FONT color="green">110</FONT>      <a name="line.110"></a>
<FONT color="green">111</FONT>      /**<a name="line.111"></a>
<FONT color="green">112</FONT>       * Return the name of the extension function.<a name="line.112"></a>
<FONT color="green">113</FONT>       *<a name="line.113"></a>
<FONT color="green">114</FONT>       * @return The name of the extension function.<a name="line.114"></a>
<FONT color="green">115</FONT>       */<a name="line.115"></a>
<FONT color="green">116</FONT>      public String getFunctionName()<a name="line.116"></a>
<FONT color="green">117</FONT>      {<a name="line.117"></a>
<FONT color="green">118</FONT>        return m_extensionName;<a name="line.118"></a>
<FONT color="green">119</FONT>      }<a name="line.119"></a>
<FONT color="green">120</FONT>      <a name="line.120"></a>
<FONT color="green">121</FONT>      /**<a name="line.121"></a>
<FONT color="green">122</FONT>       * Return the method key of the extension function.<a name="line.122"></a>
<FONT color="green">123</FONT>       *<a name="line.123"></a>
<FONT color="green">124</FONT>       * @return The method key of the extension function.<a name="line.124"></a>
<FONT color="green">125</FONT>       */<a name="line.125"></a>
<FONT color="green">126</FONT>      public Object getMethodKey()<a name="line.126"></a>
<FONT color="green">127</FONT>      {<a name="line.127"></a>
<FONT color="green">128</FONT>        return m_methodKey;<a name="line.128"></a>
<FONT color="green">129</FONT>      }<a name="line.129"></a>
<FONT color="green">130</FONT>    <a name="line.130"></a>
<FONT color="green">131</FONT>      /** <a name="line.131"></a>
<FONT color="green">132</FONT>       * Return the nth argument passed to the extension function.<a name="line.132"></a>
<FONT color="green">133</FONT>       * <a name="line.133"></a>
<FONT color="green">134</FONT>       * @param n The argument number index.<a name="line.134"></a>
<FONT color="green">135</FONT>       * @return The Expression object at the given index.<a name="line.135"></a>
<FONT color="green">136</FONT>       */    <a name="line.136"></a>
<FONT color="green">137</FONT>      public Expression getArg(int n) {<a name="line.137"></a>
<FONT color="green">138</FONT>        if (n &gt;= 0 &amp;&amp; n &lt; m_argVec.size())<a name="line.138"></a>
<FONT color="green">139</FONT>          return (Expression) m_argVec.elementAt(n);<a name="line.139"></a>
<FONT color="green">140</FONT>        else<a name="line.140"></a>
<FONT color="green">141</FONT>          return null;<a name="line.141"></a>
<FONT color="green">142</FONT>      }<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>       * Return the number of arguments that were passed<a name="line.145"></a>
<FONT color="green">146</FONT>       * into this extension function.<a name="line.146"></a>
<FONT color="green">147</FONT>       *<a name="line.147"></a>
<FONT color="green">148</FONT>       * @return The number of arguments.<a name="line.148"></a>
<FONT color="green">149</FONT>       */    <a name="line.149"></a>
<FONT color="green">150</FONT>      public int getArgCount() {<a name="line.150"></a>
<FONT color="green">151</FONT>        return m_argVec.size();<a name="line.151"></a>
<FONT color="green">152</FONT>      }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>      /**<a name="line.154"></a>
<FONT color="green">155</FONT>       * Create a new FuncExtFunction based on the qualified name of the extension,<a name="line.155"></a>
<FONT color="green">156</FONT>       * and a unique method key.<a name="line.156"></a>
<FONT color="green">157</FONT>       *<a name="line.157"></a>
<FONT color="green">158</FONT>       * @param namespace The namespace for the extension function, which should<a name="line.158"></a>
<FONT color="green">159</FONT>       *                  not normally be null or empty.<a name="line.159"></a>
<FONT color="green">160</FONT>       * @param extensionName The local name of the extension.<a name="line.160"></a>
<FONT color="green">161</FONT>       * @param methodKey Unique method key, which is passed to<a name="line.161"></a>
<FONT color="green">162</FONT>       *                  ExtensionsTable#extFunction in order to allow caching<a name="line.162"></a>
<FONT color="green">163</FONT>       *                  of the method.<a name="line.163"></a>
<FONT color="green">164</FONT>       */<a name="line.164"></a>
<FONT color="green">165</FONT>      public FuncExtFunction(java.lang.String namespace,<a name="line.165"></a>
<FONT color="green">166</FONT>                             java.lang.String extensionName, Object methodKey)<a name="line.166"></a>
<FONT color="green">167</FONT>      {<a name="line.167"></a>
<FONT color="green">168</FONT>        //try{throw new Exception("FuncExtFunction() " + namespace + " " + extensionName);} catch (Exception e){e.printStackTrace();}<a name="line.168"></a>
<FONT color="green">169</FONT>        m_namespace = namespace;<a name="line.169"></a>
<FONT color="green">170</FONT>        m_extensionName = extensionName;<a name="line.170"></a>
<FONT color="green">171</FONT>        m_methodKey = methodKey;<a name="line.171"></a>
<FONT color="green">172</FONT>      }<a name="line.172"></a>
<FONT color="green">173</FONT>    <a name="line.173"></a>
<FONT color="green">174</FONT>      /**<a name="line.174"></a>
<FONT color="green">175</FONT>       * Execute the function.  The function must return<a name="line.175"></a>
<FONT color="green">176</FONT>       * a valid object.<a name="line.176"></a>
<FONT color="green">177</FONT>       * @param xctxt The current execution context.<a name="line.177"></a>
<FONT color="green">178</FONT>       * @return A valid XObject.<a name="line.178"></a>
<FONT color="green">179</FONT>       *<a name="line.179"></a>
<FONT color="green">180</FONT>       * @throws javax.xml.transform.TransformerException<a name="line.180"></a>
<FONT color="green">181</FONT>       */<a name="line.181"></a>
<FONT color="green">182</FONT>      public XObject execute(XPathContext xctxt)<a name="line.182"></a>
<FONT color="green">183</FONT>              throws javax.xml.transform.TransformerException<a name="line.183"></a>
<FONT color="green">184</FONT>      {<a name="line.184"></a>
<FONT color="green">185</FONT>        if (xctxt.isSecureProcessing())<a name="line.185"></a>
<FONT color="green">186</FONT>          throw new javax.xml.transform.TransformerException(<a name="line.186"></a>
<FONT color="green">187</FONT>            XPATHMessages.createXPATHMessage(<a name="line.187"></a>
<FONT color="green">188</FONT>              XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED,<a name="line.188"></a>
<FONT color="green">189</FONT>              new Object[] {toString()}));<a name="line.189"></a>
<FONT color="green">190</FONT>          <a name="line.190"></a>
<FONT color="green">191</FONT>        XObject result;<a name="line.191"></a>
<FONT color="green">192</FONT>        Vector argVec = new Vector();<a name="line.192"></a>
<FONT color="green">193</FONT>        int nArgs = m_argVec.size();<a name="line.193"></a>
<FONT color="green">194</FONT>    <a name="line.194"></a>
<FONT color="green">195</FONT>        for (int i = 0; i &lt; nArgs; i++)<a name="line.195"></a>
<FONT color="green">196</FONT>        {<a name="line.196"></a>
<FONT color="green">197</FONT>          Expression arg = (Expression) m_argVec.elementAt(i);<a name="line.197"></a>
<FONT color="green">198</FONT>          <a name="line.198"></a>
<FONT color="green">199</FONT>          XObject xobj = arg.execute(xctxt);<a name="line.199"></a>
<FONT color="green">200</FONT>          /*<a name="line.200"></a>
<FONT color="green">201</FONT>           * Should cache the arguments for func:function<a name="line.201"></a>
<FONT color="green">202</FONT>           */<a name="line.202"></a>
<FONT color="green">203</FONT>          xobj.allowDetachToRelease(false); <a name="line.203"></a>
<FONT color="green">204</FONT>          argVec.addElement(xobj);<a name="line.204"></a>
<FONT color="green">205</FONT>        }<a name="line.205"></a>
<FONT color="green">206</FONT>        //dml<a name="line.206"></a>
<FONT color="green">207</FONT>        ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();<a name="line.207"></a>
<FONT color="green">208</FONT>        Object val = extProvider.extFunction(this, argVec);<a name="line.208"></a>
<FONT color="green">209</FONT>    <a name="line.209"></a>
<FONT color="green">210</FONT>        if (null != val)<a name="line.210"></a>
<FONT color="green">211</FONT>        {<a name="line.211"></a>
<FONT color="green">212</FONT>          result = XObject.create(val, xctxt);<a name="line.212"></a>
<FONT color="green">213</FONT>        }<a name="line.213"></a>
<FONT color="green">214</FONT>        else<a name="line.214"></a>
<FONT color="green">215</FONT>        {<a name="line.215"></a>
<FONT color="green">216</FONT>          result = new XNull();<a name="line.216"></a>
<FONT color="green">217</FONT>        }<a name="line.217"></a>
<FONT color="green">218</FONT>    <a name="line.218"></a>
<FONT color="green">219</FONT>        return result;<a name="line.219"></a>
<FONT color="green">220</FONT>      }<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>       * Set an argument expression for a function.  This method is called by the<a name="line.223"></a>
<FONT color="green">224</FONT>       * XPath compiler.<a name="line.224"></a>
<FONT color="green">225</FONT>       *<a name="line.225"></a>
<FONT color="green">226</FONT>       * @param arg non-null expression that represents the argument.<a name="line.226"></a>
<FONT color="green">227</FONT>       * @param argNum The argument number index.<a name="line.227"></a>
<FONT color="green">228</FONT>       *<a name="line.228"></a>
<FONT color="green">229</FONT>       * @throws WrongNumberArgsException If the argNum parameter is beyond what<a name="line.229"></a>
<FONT color="green">230</FONT>       * is specified for this function.<a name="line.230"></a>
<FONT color="green">231</FONT>       */<a name="line.231"></a>
<FONT color="green">232</FONT>      public void setArg(Expression arg, int argNum)<a name="line.232"></a>
<FONT color="green">233</FONT>              throws WrongNumberArgsException<a name="line.233"></a>
<FONT color="green">234</FONT>      {<a name="line.234"></a>
<FONT color="green">235</FONT>        m_argVec.addElement(arg);<a name="line.235"></a>
<FONT color="green">236</FONT>        arg.exprSetParent(this);<a name="line.236"></a>
<FONT color="green">237</FONT>      }<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>      /**<a name="line.239"></a>
<FONT color="green">240</FONT>       * Check that the number of arguments passed to this function is correct.<a name="line.240"></a>
<FONT color="green">241</FONT>       *<a name="line.241"></a>
<FONT color="green">242</FONT>       *<a name="line.242"></a>
<FONT color="green">243</FONT>       * @param argNum The number of arguments that is being passed to the function.<a name="line.243"></a>
<FONT color="green">244</FONT>       *<a name="line.244"></a>
<FONT color="green">245</FONT>       * @throws WrongNumberArgsException<a name="line.245"></a>
<FONT color="green">246</FONT>       */<a name="line.246"></a>
<FONT color="green">247</FONT>      public void checkNumberArgs(int argNum) throws WrongNumberArgsException{}<a name="line.247"></a>
<FONT color="green">248</FONT>    <a name="line.248"></a>
<FONT color="green">249</FONT>    <a name="line.249"></a>
<FONT color="green">250</FONT>      class ArgExtOwner implements ExpressionOwner<a name="line.250"></a>
<FONT color="green">251</FONT>      {<a name="line.251"></a>
<FONT color="green">252</FONT>      <a name="line.252"></a>
<FONT color="green">253</FONT>        Expression m_exp;<a name="line.253"></a>
<FONT color="green">254</FONT>            <a name="line.254"></a>
<FONT color="green">255</FONT>            ArgExtOwner(Expression exp)<a name="line.255"></a>
<FONT color="green">256</FONT>            {<a name="line.256"></a>
<FONT color="green">257</FONT>                    m_exp = exp;<a name="line.257"></a>
<FONT color="green">258</FONT>            }<a name="line.258"></a>
<FONT color="green">259</FONT>            <a name="line.259"></a>
<FONT color="green">260</FONT>        /**<a name="line.260"></a>
<FONT color="green">261</FONT>         * @see ExpressionOwner#getExpression()<a name="line.261"></a>
<FONT color="green">262</FONT>         */<a name="line.262"></a>
<FONT color="green">263</FONT>        public Expression getExpression()<a name="line.263"></a>
<FONT color="green">264</FONT>        {<a name="line.264"></a>
<FONT color="green">265</FONT>          return m_exp;<a name="line.265"></a>
<FONT color="green">266</FONT>        }<a name="line.266"></a>
<FONT color="green">267</FONT>    <a name="line.267"></a>
<FONT color="green">268</FONT>    <a name="line.268"></a>
<FONT color="green">269</FONT>        /**<a name="line.269"></a>
<FONT color="green">270</FONT>         * @see ExpressionOwner#setExpression(Expression)<a name="line.270"></a>
<FONT color="green">271</FONT>         */<a name="line.271"></a>
<FONT color="green">272</FONT>        public void setExpression(Expression exp)<a name="line.272"></a>
<FONT color="green">273</FONT>        {<a name="line.273"></a>
<FONT color="green">274</FONT>            exp.exprSetParent(FuncExtFunction.this);<a name="line.274"></a>
<FONT color="green">275</FONT>            m_exp = exp;<a name="line.275"></a>
<FONT color="green">276</FONT>        }<a name="line.276"></a>
<FONT color="green">277</FONT>      }<a name="line.277"></a>
<FONT color="green">278</FONT>      <a name="line.278"></a>
<FONT color="green">279</FONT>      <a name="line.279"></a>
<FONT color="green">280</FONT>      /**<a name="line.280"></a>
<FONT color="green">281</FONT>       * Call the visitors for the function arguments.<a name="line.281"></a>
<FONT color="green">282</FONT>       */<a name="line.282"></a>
<FONT color="green">283</FONT>      public void callArgVisitors(XPathVisitor visitor)<a name="line.283"></a>
<FONT color="green">284</FONT>      {<a name="line.284"></a>
<FONT color="green">285</FONT>          for (int i = 0; i &lt; m_argVec.size(); i++)<a name="line.285"></a>
<FONT color="green">286</FONT>          {<a name="line.286"></a>
<FONT color="green">287</FONT>             Expression exp = (Expression)m_argVec.elementAt(i);<a name="line.287"></a>
<FONT color="green">288</FONT>             exp.callVisitors(new ArgExtOwner(exp), visitor);<a name="line.288"></a>
<FONT color="green">289</FONT>          }<a name="line.289"></a>
<FONT color="green">290</FONT>        <a name="line.290"></a>
<FONT color="green">291</FONT>      }<a name="line.291"></a>
<FONT color="green">292</FONT>    <a name="line.292"></a>
<FONT color="green">293</FONT>      /**<a name="line.293"></a>
<FONT color="green">294</FONT>       * Set the parent node.<a name="line.294"></a>
<FONT color="green">295</FONT>       * For an extension function, we also need to set the parent<a name="line.295"></a>
<FONT color="green">296</FONT>       * node for all argument expressions.<a name="line.296"></a>
<FONT color="green">297</FONT>       * <a name="line.297"></a>
<FONT color="green">298</FONT>       * @param n The parent node<a name="line.298"></a>
<FONT color="green">299</FONT>       */<a name="line.299"></a>
<FONT color="green">300</FONT>      public void exprSetParent(ExpressionNode n) <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>        super.exprSetParent(n);<a name="line.303"></a>
<FONT color="green">304</FONT>          <a name="line.304"></a>
<FONT color="green">305</FONT>        int nArgs = m_argVec.size();<a name="line.305"></a>
<FONT color="green">306</FONT>    <a name="line.306"></a>
<FONT color="green">307</FONT>        for (int i = 0; i &lt; nArgs; i++)<a name="line.307"></a>
<FONT color="green">308</FONT>        {<a name="line.308"></a>
<FONT color="green">309</FONT>          Expression arg = (Expression) m_argVec.elementAt(i);<a name="line.309"></a>
<FONT color="green">310</FONT>    <a name="line.310"></a>
<FONT color="green">311</FONT>          arg.exprSetParent(n);<a name="line.311"></a>
<FONT color="green">312</FONT>        }           <a name="line.312"></a>
<FONT color="green">313</FONT>      }<a name="line.313"></a>
<FONT color="green">314</FONT>    <a name="line.314"></a>
<FONT color="green">315</FONT>      /**<a name="line.315"></a>
<FONT color="green">316</FONT>       * Constructs and throws a WrongNumberArgException with the appropriate<a name="line.316"></a>
<FONT color="green">317</FONT>       * message for this function object.  This class supports an arbitrary<a name="line.317"></a>
<FONT color="green">318</FONT>       * number of arguments, so this method must never be called.<a name="line.318"></a>
<FONT color="green">319</FONT>       *<a name="line.319"></a>
<FONT color="green">320</FONT>       * @throws WrongNumberArgsException<a name="line.320"></a>
<FONT color="green">321</FONT>       */<a name="line.321"></a>
<FONT color="green">322</FONT>      protected void reportWrongNumberArgs() throws WrongNumberArgsException {<a name="line.322"></a>
<FONT color="green">323</FONT>        String fMsg = XSLMessages.createXPATHMessage(<a name="line.323"></a>
<FONT color="green">324</FONT>            XPATHErrorResources.ER_INCORRECT_PROGRAMMER_ASSERTION,<a name="line.324"></a>
<FONT color="green">325</FONT>            new Object[]{ "Programmer's assertion:  the method FunctionMultiArgs.reportWrongNumberArgs() should never be called." });<a name="line.325"></a>
<FONT color="green">326</FONT>    <a name="line.326"></a>
<FONT color="green">327</FONT>        throw new RuntimeException(fMsg);<a name="line.327"></a>
<FONT color="green">328</FONT>      }<a name="line.328"></a>
<FONT color="green">329</FONT>      <a name="line.329"></a>
<FONT color="green">330</FONT>      /**<a name="line.330"></a>
<FONT color="green">331</FONT>       * Return the name of the extesion function in string format<a name="line.331"></a>
<FONT color="green">332</FONT>       */<a name="line.332"></a>
<FONT color="green">333</FONT>      public String toString()<a name="line.333"></a>
<FONT color="green">334</FONT>      {<a name="line.334"></a>
<FONT color="green">335</FONT>        if (m_namespace != null &amp;&amp; m_namespace.length() &gt; 0)<a name="line.335"></a>
<FONT color="green">336</FONT>          return "{" + m_namespace + "}" + m_extensionName;<a name="line.336"></a>
<FONT color="green">337</FONT>        else<a name="line.337"></a>
<FONT color="green">338</FONT>          return m_extensionName;<a name="line.338"></a>
<FONT color="green">339</FONT>      }  <a name="line.339"></a>
<FONT color="green">340</FONT>    }<a name="line.340"></a>


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