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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: XPathEvaluatorImpl.java 1225443 2011-12-29 05:44:18Z mrglavas $<a name="line.19"></a>
<FONT color="green">020</FONT>     */<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    package org.apache.xpath.domapi;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    import javax.xml.transform.TransformerException;<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.xml.utils.PrefixResolver;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.xpath.XPath;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.xpath.res.XPATHErrorResources;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.xpath.res.XPATHMessages;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.w3c.dom.DOMException;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.w3c.dom.Document;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.w3c.dom.Node;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.w3c.dom.xpath.XPathEvaluator;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.w3c.dom.xpath.XPathException;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.w3c.dom.xpath.XPathExpression;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.w3c.dom.xpath.XPathNSResolver;<a name="line.36"></a>
<FONT color="green">037</FONT>    <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>     * The class provides an implementation of XPathEvaluator according <a name="line.40"></a>
<FONT color="green">041</FONT>     * to the DOM L3 XPath Specification, Working Group Note 26 February 2004.<a name="line.41"></a>
<FONT color="green">042</FONT>     *<a name="line.42"></a>
<FONT color="green">043</FONT>     * &lt;p&gt;See also the &lt;a href='http://www.w3.org/TR/2004/NOTE-DOM-Level-3-XPath-20040226'&gt;Document Object Model (DOM) Level 3 XPath Specification&lt;/a&gt;.&lt;/p&gt;<a name="line.43"></a>
<FONT color="green">044</FONT>     * <a name="line.44"></a>
<FONT color="green">045</FONT>     * &lt;/p&gt;The evaluation of XPath expressions is provided by <a name="line.45"></a>
<FONT color="green">046</FONT>     * &lt;code&gt;XPathEvaluator&lt;/code&gt;, which will provide evaluation of XPath 1.0 <a name="line.46"></a>
<FONT color="green">047</FONT>     * expressions with no specialized extension functions or variables. It is <a name="line.47"></a>
<FONT color="green">048</FONT>     * expected that the &lt;code&gt;XPathEvaluator&lt;/code&gt; interface will be <a name="line.48"></a>
<FONT color="green">049</FONT>     * implemented on the same object which implements the &lt;code&gt;Document&lt;/code&gt; <a name="line.49"></a>
<FONT color="green">050</FONT>     * interface in an implementation which supports the XPath DOM module. <a name="line.50"></a>
<FONT color="green">051</FONT>     * &lt;code&gt;XPathEvaluator&lt;/code&gt; implementations may be available from other <a name="line.51"></a>
<FONT color="green">052</FONT>     * sources that may provide support for special extension functions or <a name="line.52"></a>
<FONT color="green">053</FONT>     * variables which are not defined in this specification.&lt;/p&gt;<a name="line.53"></a>
<FONT color="green">054</FONT>     * <a name="line.54"></a>
<FONT color="green">055</FONT>     * @see org.w3c.dom.xpath.XPathEvaluator<a name="line.55"></a>
<FONT color="green">056</FONT>     * <a name="line.56"></a>
<FONT color="green">057</FONT>     * @xsl.usage internal<a name="line.57"></a>
<FONT color="green">058</FONT>     */<a name="line.58"></a>
<FONT color="green">059</FONT>    public final class XPathEvaluatorImpl implements XPathEvaluator {<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>            /**<a name="line.61"></a>
<FONT color="green">062</FONT>             * This prefix resolver is created whenever null is passed to the <a name="line.62"></a>
<FONT color="green">063</FONT>             * evaluate method.  Its purpose is to satisfy the DOM L3 XPath API<a name="line.63"></a>
<FONT color="green">064</FONT>             * requirement that if a null prefix resolver is used, an exception <a name="line.64"></a>
<FONT color="green">065</FONT>             * should only be thrown when an attempt is made to resolve a prefix.<a name="line.65"></a>
<FONT color="green">066</FONT>             */<a name="line.66"></a>
<FONT color="green">067</FONT>            private static class DummyPrefixResolver implements PrefixResolver {<a name="line.67"></a>
<FONT color="green">068</FONT>    <a name="line.68"></a>
<FONT color="green">069</FONT>                    /**<a name="line.69"></a>
<FONT color="green">070</FONT>                     * Constructor for DummyPrefixResolver.<a name="line.70"></a>
<FONT color="green">071</FONT>                     */<a name="line.71"></a>
<FONT color="green">072</FONT>                    DummyPrefixResolver() {}<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>                     * @exception DOMException<a name="line.75"></a>
<FONT color="green">076</FONT>             *   NAMESPACE_ERR: Always throws this exceptionn<a name="line.76"></a>
<FONT color="green">077</FONT>                     *<a name="line.77"></a>
<FONT color="green">078</FONT>                     * @see org.apache.xml.utils.PrefixResolver#getNamespaceForPrefix(String, Node)<a name="line.78"></a>
<FONT color="green">079</FONT>                     */<a name="line.79"></a>
<FONT color="green">080</FONT>                    public String getNamespaceForPrefix(String prefix, Node context) {<a name="line.80"></a>
<FONT color="green">081</FONT>                String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_NULL_RESOLVER, null);       <a name="line.81"></a>
<FONT color="green">082</FONT>                throw new DOMException(DOMException.NAMESPACE_ERR, fmsg);   // Unable to resolve prefix with null prefix resolver.         <a name="line.82"></a>
<FONT color="green">083</FONT>                    }<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>                    /**<a name="line.85"></a>
<FONT color="green">086</FONT>                     * @exception DOMException<a name="line.86"></a>
<FONT color="green">087</FONT>             *   NAMESPACE_ERR: Always throws this exceptionn<a name="line.87"></a>
<FONT color="green">088</FONT>             * <a name="line.88"></a>
<FONT color="green">089</FONT>                     * @see org.apache.xml.utils.PrefixResolver#getNamespaceForPrefix(String)<a name="line.89"></a>
<FONT color="green">090</FONT>                     */<a name="line.90"></a>
<FONT color="green">091</FONT>                    public String getNamespaceForPrefix(String prefix) {<a name="line.91"></a>
<FONT color="green">092</FONT>                            return getNamespaceForPrefix(prefix,null);<a name="line.92"></a>
<FONT color="green">093</FONT>                    }<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>                    /**<a name="line.95"></a>
<FONT color="green">096</FONT>                     * @see org.apache.xml.utils.PrefixResolver#handlesNullPrefixes()<a name="line.96"></a>
<FONT color="green">097</FONT>                     */<a name="line.97"></a>
<FONT color="green">098</FONT>                    public boolean handlesNullPrefixes() {<a name="line.98"></a>
<FONT color="green">099</FONT>                            return false;<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>                    /**<a name="line.102"></a>
<FONT color="green">103</FONT>                     * @see org.apache.xml.utils.PrefixResolver#getBaseIdentifier()<a name="line.103"></a>
<FONT color="green">104</FONT>                     */<a name="line.104"></a>
<FONT color="green">105</FONT>                    public String getBaseIdentifier() {<a name="line.105"></a>
<FONT color="green">106</FONT>                            return null;<a name="line.106"></a>
<FONT color="green">107</FONT>                    }<a name="line.107"></a>
<FONT color="green">108</FONT>    <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>         * The document to be searched to parallel the case where the XPathEvaluator<a name="line.112"></a>
<FONT color="green">113</FONT>         * is obtained by casting a Document.<a name="line.113"></a>
<FONT color="green">114</FONT>         */  <a name="line.114"></a>
<FONT color="green">115</FONT>        private final Document m_doc;<a name="line.115"></a>
<FONT color="green">116</FONT>        <a name="line.116"></a>
<FONT color="green">117</FONT>        /**<a name="line.117"></a>
<FONT color="green">118</FONT>         * Constructor for XPathEvaluatorImpl.<a name="line.118"></a>
<FONT color="green">119</FONT>         * <a name="line.119"></a>
<FONT color="green">120</FONT>         * @param doc The document to be searched, to parallel the case where''<a name="line.120"></a>
<FONT color="green">121</FONT>         *            the XPathEvaluator is obtained by casting the document.<a name="line.121"></a>
<FONT color="green">122</FONT>         */<a name="line.122"></a>
<FONT color="green">123</FONT>        public XPathEvaluatorImpl(Document doc) {<a name="line.123"></a>
<FONT color="green">124</FONT>            m_doc = doc;<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>        /**<a name="line.127"></a>
<FONT color="green">128</FONT>         * Constructor in the case that the XPath expression can be evaluated<a name="line.128"></a>
<FONT color="green">129</FONT>         * without needing an XML document at all.<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>        public XPathEvaluatorImpl() {<a name="line.132"></a>
<FONT color="green">133</FONT>                m_doc = null;<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>            /**<a name="line.136"></a>
<FONT color="green">137</FONT>         * Creates a parsed XPath expression with resolved namespaces. This is <a name="line.137"></a>
<FONT color="green">138</FONT>         * useful when an expression will be reused in an application since it <a name="line.138"></a>
<FONT color="green">139</FONT>         * makes it possible to compile the expression string into a more <a name="line.139"></a>
<FONT color="green">140</FONT>         * efficient internal form and preresolve all namespace prefixes which <a name="line.140"></a>
<FONT color="green">141</FONT>         * occur within the expression.<a name="line.141"></a>
<FONT color="green">142</FONT>         * <a name="line.142"></a>
<FONT color="green">143</FONT>         * @param expression The XPath expression string to be parsed.<a name="line.143"></a>
<FONT color="green">144</FONT>         * @param resolver The &lt;code&gt;resolver&lt;/code&gt; permits translation of <a name="line.144"></a>
<FONT color="green">145</FONT>         *   prefixes within the XPath expression into appropriate namespace URIs<a name="line.145"></a>
<FONT color="green">146</FONT>         *   . If this is specified as &lt;code&gt;null&lt;/code&gt;, any namespace prefix <a name="line.146"></a>
<FONT color="green">147</FONT>         *   within the expression will result in &lt;code&gt;DOMException&lt;/code&gt; <a name="line.147"></a>
<FONT color="green">148</FONT>         *   being thrown with the code &lt;code&gt;NAMESPACE_ERR&lt;/code&gt;.<a name="line.148"></a>
<FONT color="green">149</FONT>         * @return The compiled form of the XPath expression.<a name="line.149"></a>
<FONT color="green">150</FONT>         * @exception XPathException<a name="line.150"></a>
<FONT color="green">151</FONT>         *   INVALID_EXPRESSION_ERR: Raised if the expression is not legal <a name="line.151"></a>
<FONT color="green">152</FONT>         *   according to the rules of the &lt;code&gt;XPathEvaluator&lt;/code&gt;i<a name="line.152"></a>
<FONT color="green">153</FONT>         * @exception DOMException<a name="line.153"></a>
<FONT color="green">154</FONT>         *   NAMESPACE_ERR: Raised if the expression contains namespace prefixes <a name="line.154"></a>
<FONT color="green">155</FONT>         *   which cannot be resolved by the specified <a name="line.155"></a>
<FONT color="green">156</FONT>         *   &lt;code&gt;XPathNSResolver&lt;/code&gt;.      <a name="line.156"></a>
<FONT color="green">157</FONT>         *  <a name="line.157"></a>
<FONT color="green">158</FONT>             * @see org.w3c.dom.xpath.XPathEvaluator#createExpression(String, XPathNSResolver)<a name="line.158"></a>
<FONT color="green">159</FONT>             */<a name="line.159"></a>
<FONT color="green">160</FONT>            public XPathExpression createExpression(<a name="line.160"></a>
<FONT color="green">161</FONT>                    String expression,<a name="line.161"></a>
<FONT color="green">162</FONT>                    XPathNSResolver resolver)<a name="line.162"></a>
<FONT color="green">163</FONT>                    throws XPathException, DOMException {<a name="line.163"></a>
<FONT color="green">164</FONT>                    <a name="line.164"></a>
<FONT color="green">165</FONT>                    try {<a name="line.165"></a>
<FONT color="green">166</FONT>                            <a name="line.166"></a>
<FONT color="green">167</FONT>                            // If the resolver is null, create a dummy prefix resolver<a name="line.167"></a>
<FONT color="green">168</FONT>                            XPath xpath =  new XPath(expression,null,<a name="line.168"></a>
<FONT color="green">169</FONT>                                 ((null == resolver) ? new DummyPrefixResolver() : ((PrefixResolver)resolver)), <a name="line.169"></a>
<FONT color="green">170</FONT>                                  XPath.SELECT);<a name="line.170"></a>
<FONT color="green">171</FONT>                      <a name="line.171"></a>
<FONT color="green">172</FONT>                return new XPathExpressionImpl(xpath, m_doc);<a name="line.172"></a>
<FONT color="green">173</FONT>                            <a name="line.173"></a>
<FONT color="green">174</FONT>                    } catch (TransformerException e) {<a name="line.174"></a>
<FONT color="green">175</FONT>                            // Need to pass back exception code DOMException.NAMESPACE_ERR also.<a name="line.175"></a>
<FONT color="green">176</FONT>                            // Error found in DOM Level 3 XPath Test Suite.<a name="line.176"></a>
<FONT color="green">177</FONT>                            if(e instanceof XPathStylesheetDOM3Exception)<a name="line.177"></a>
<FONT color="green">178</FONT>                                    throw new DOMException(DOMException.NAMESPACE_ERR,e.getMessageAndLocation());<a name="line.178"></a>
<FONT color="green">179</FONT>                            else<a name="line.179"></a>
<FONT color="green">180</FONT>                                    throw new XPathException(XPathException.INVALID_EXPRESSION_ERR,e.getMessageAndLocation());<a name="line.180"></a>
<FONT color="green">181</FONT>                                    <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>    <a name="line.184"></a>
<FONT color="green">185</FONT>            /**<a name="line.185"></a>
<FONT color="green">186</FONT>         * Adapts any DOM node to resolve namespaces so that an XPath expression <a name="line.186"></a>
<FONT color="green">187</FONT>         * can be easily evaluated relative to the context of the node where it <a name="line.187"></a>
<FONT color="green">188</FONT>         * appeared within the document. This adapter works like the DOM Level 3 <a name="line.188"></a>
<FONT color="green">189</FONT>         * method &lt;code&gt;lookupNamespaceURI&lt;/code&gt; on nodes in resolving the <a name="line.189"></a>
<FONT color="green">190</FONT>         * namespaceURI from a given prefix using the current information available <a name="line.190"></a>
<FONT color="green">191</FONT>         * in the node's hierarchy at the time lookupNamespaceURI is called, also <a name="line.191"></a>
<FONT color="green">192</FONT>         * correctly resolving the implicit xml prefix.<a name="line.192"></a>
<FONT color="green">193</FONT>         *<a name="line.193"></a>
<FONT color="green">194</FONT>         * @param nodeResolver The node to be used as a context for namespace <a name="line.194"></a>
<FONT color="green">195</FONT>         *   resolution.<a name="line.195"></a>
<FONT color="green">196</FONT>         * @return &lt;code&gt;XPathNSResolver&lt;/code&gt; which resolves namespaces with <a name="line.196"></a>
<FONT color="green">197</FONT>         *   respect to the definitions in scope for a specified node.<a name="line.197"></a>
<FONT color="green">198</FONT>         *  <a name="line.198"></a>
<FONT color="green">199</FONT>             * @see org.w3c.dom.xpath.XPathEvaluator#createNSResolver(Node)<a name="line.199"></a>
<FONT color="green">200</FONT>             */<a name="line.200"></a>
<FONT color="green">201</FONT>            public XPathNSResolver createNSResolver(Node nodeResolver) {<a name="line.201"></a>
<FONT color="green">202</FONT>            <a name="line.202"></a>
<FONT color="green">203</FONT>                    return new XPathNSResolverImpl((nodeResolver.getNodeType() == Node.DOCUMENT_NODE)<a name="line.203"></a>
<FONT color="green">204</FONT>                       ? ((Document) nodeResolver).getDocumentElement() : nodeResolver);<a name="line.204"></a>
<FONT color="green">205</FONT>            }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>            /**<a name="line.207"></a>
<FONT color="green">208</FONT>         * Evaluates an XPath expression string and returns a result of the <a name="line.208"></a>
<FONT color="green">209</FONT>         * specified type if possible.<a name="line.209"></a>
<FONT color="green">210</FONT>         * <a name="line.210"></a>
<FONT color="green">211</FONT>         * @param expression The XPath expression string to be parsed and <a name="line.211"></a>
<FONT color="green">212</FONT>         *   evaluated.<a name="line.212"></a>
<FONT color="green">213</FONT>         * @param contextNode The &lt;code&gt;context&lt;/code&gt; is context node for the <a name="line.213"></a>
<FONT color="green">214</FONT>         *   evaluation of this XPath expression. If the XPathEvaluator was <a name="line.214"></a>
<FONT color="green">215</FONT>         *   obtained by casting the &lt;code&gt;Document&lt;/code&gt; then this must be <a name="line.215"></a>
<FONT color="green">216</FONT>         *   owned by the same document and must be a &lt;code&gt;Document&lt;/code&gt;, <a name="line.216"></a>
<FONT color="green">217</FONT>         *   &lt;code&gt;Element&lt;/code&gt;, &lt;code&gt;Attribute&lt;/code&gt;, &lt;code&gt;Text&lt;/code&gt;, <a name="line.217"></a>
<FONT color="green">218</FONT>         *   &lt;code&gt;CDATASection&lt;/code&gt;, &lt;code&gt;Comment&lt;/code&gt;, <a name="line.218"></a>
<FONT color="green">219</FONT>         *   &lt;code&gt;ProcessingInstruction&lt;/code&gt;, or &lt;code&gt;XPathNamespace&lt;/code&gt; <a name="line.219"></a>
<FONT color="green">220</FONT>         *   node. If the context node is a &lt;code&gt;Text&lt;/code&gt; or a <a name="line.220"></a>
<FONT color="green">221</FONT>         *   &lt;code&gt;CDATASection&lt;/code&gt;, then the context is interpreted as the <a name="line.221"></a>
<FONT color="green">222</FONT>         *   whole logical text node as seen by XPath, unless the node is empty <a name="line.222"></a>
<FONT color="green">223</FONT>         *   in which case it may not serve as the XPath context.<a name="line.223"></a>
<FONT color="green">224</FONT>         * @param resolver The &lt;code&gt;resolver&lt;/code&gt; permits translation of <a name="line.224"></a>
<FONT color="green">225</FONT>         *   prefixes within the XPath expression into appropriate namespace URIs<a name="line.225"></a>
<FONT color="green">226</FONT>         *   . If this is specified as &lt;code&gt;null&lt;/code&gt;, any namespace prefix <a name="line.226"></a>
<FONT color="green">227</FONT>         *   within the expression will result in &lt;code&gt;DOMException&lt;/code&gt; <a name="line.227"></a>
<FONT color="green">228</FONT>         *   being thrown with the code &lt;code&gt;NAMESPACE_ERR&lt;/code&gt;.<a name="line.228"></a>
<FONT color="green">229</FONT>         * @param type If a specific &lt;code&gt;type&lt;/code&gt; is specified, then the <a name="line.229"></a>
<FONT color="green">230</FONT>         *   result will be coerced to return the specified type relying on <a name="line.230"></a>
<FONT color="green">231</FONT>         *   XPath type conversions and fail if the desired coercion is not <a name="line.231"></a>
<FONT color="green">232</FONT>         *   possible. This must be one of the type codes of <a name="line.232"></a>
<FONT color="green">233</FONT>         *   &lt;code&gt;XPathResult&lt;/code&gt;.<a name="line.233"></a>
<FONT color="green">234</FONT>         * @param result The &lt;code&gt;result&lt;/code&gt; specifies a specific result <a name="line.234"></a>
<FONT color="green">235</FONT>         *   object which may be reused and returned by this method. If this is <a name="line.235"></a>
<FONT color="green">236</FONT>         *   specified as &lt;code&gt;null&lt;/code&gt;or the implementation does not reuse <a name="line.236"></a>
<FONT color="green">237</FONT>         *   the specified result, a new result object will be constructed and <a name="line.237"></a>
<FONT color="green">238</FONT>         *   returned.For XPath 1.0 results, this object will be of type <a name="line.238"></a>
<FONT color="green">239</FONT>         *   &lt;code&gt;XPathResult&lt;/code&gt;.<a name="line.239"></a>
<FONT color="green">240</FONT>         * @return The result of the evaluation of the XPath expression.For XPath <a name="line.240"></a>
<FONT color="green">241</FONT>         *   1.0 results, this object will be of type &lt;code&gt;XPathResult&lt;/code&gt;.<a name="line.241"></a>
<FONT color="green">242</FONT>         * @exception XPathException<a name="line.242"></a>
<FONT color="green">243</FONT>         *   INVALID_EXPRESSION_ERR: Raised if the expression is not legal <a name="line.243"></a>
<FONT color="green">244</FONT>         *   according to the rules of the &lt;code&gt;XPathEvaluator&lt;/code&gt;i<a name="line.244"></a>
<FONT color="green">245</FONT>         *   &lt;br&gt;TYPE_ERR: Raised if the result cannot be converted to return the <a name="line.245"></a>
<FONT color="green">246</FONT>         *   specified type.<a name="line.246"></a>
<FONT color="green">247</FONT>         * @exception DOMException<a name="line.247"></a>
<FONT color="green">248</FONT>         *   NAMESPACE_ERR: Raised if the expression contains namespace prefixes <a name="line.248"></a>
<FONT color="green">249</FONT>         *   which cannot be resolved by the specified <a name="line.249"></a>
<FONT color="green">250</FONT>         *   &lt;code&gt;XPathNSResolver&lt;/code&gt;.<a name="line.250"></a>
<FONT color="green">251</FONT>         *   &lt;br&gt;WRONG_DOCUMENT_ERR: The Node is from a document that is not <a name="line.251"></a>
<FONT color="green">252</FONT>         *   supported by this XPathEvaluator.<a name="line.252"></a>
<FONT color="green">253</FONT>         *   &lt;br&gt;NOT_SUPPORTED_ERR: The Node is not a type permitted as an XPath <a name="line.253"></a>
<FONT color="green">254</FONT>         *   context node.<a name="line.254"></a>
<FONT color="green">255</FONT>             * <a name="line.255"></a>
<FONT color="green">256</FONT>             * @see org.w3c.dom.xpath.XPathEvaluator#evaluate(String, Node, XPathNSResolver, short, XPathResult)<a name="line.256"></a>
<FONT color="green">257</FONT>             */<a name="line.257"></a>
<FONT color="green">258</FONT>            public Object evaluate(<a name="line.258"></a>
<FONT color="green">259</FONT>                    String expression,<a name="line.259"></a>
<FONT color="green">260</FONT>                    Node contextNode,<a name="line.260"></a>
<FONT color="green">261</FONT>                    XPathNSResolver resolver,<a name="line.261"></a>
<FONT color="green">262</FONT>                    short type,<a name="line.262"></a>
<FONT color="green">263</FONT>                    Object result)<a name="line.263"></a>
<FONT color="green">264</FONT>                    throws XPathException, DOMException {<a name="line.264"></a>
<FONT color="green">265</FONT>                            <a name="line.265"></a>
<FONT color="green">266</FONT>                    XPathExpression xpathExpression = createExpression(expression, resolver);<a name="line.266"></a>
<FONT color="green">267</FONT>                    <a name="line.267"></a>
<FONT color="green">268</FONT>                    return  xpathExpression.evaluate(contextNode, type, result);<a name="line.268"></a>
<FONT color="green">269</FONT>            }<a name="line.269"></a>
<FONT color="green">270</FONT>    <a name="line.270"></a>
<FONT color="green">271</FONT>    }<a name="line.271"></a>


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