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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: ExpressionVisitor.java 468637 2006-10-28 06:51:02Z 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.extensions;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import org.apache.xalan.templates.StylesheetRoot;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import org.apache.xpath.ExpressionOwner;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.xpath.XPathVisitor;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import org.apache.xpath.functions.FuncExtFunction;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xpath.functions.FuncExtFunctionAvailable;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xpath.functions.Function;<a name="line.28"></a> |
| <FONT color="green">029</FONT> <a name="line.29"></a> |
| <FONT color="green">030</FONT> /**<a name="line.30"></a> |
| <FONT color="green">031</FONT> * When {@link org.apache.xalan.processor.StylesheetHandler} creates <a name="line.31"></a> |
| <FONT color="green">032</FONT> * an {@link org.apache.xpath.XPath}, the ExpressionVisitor<a name="line.32"></a> |
| <FONT color="green">033</FONT> * visits the XPath expression. For any extension functions it <a name="line.33"></a> |
| <FONT color="green">034</FONT> * encounters, it instructs StylesheetRoot to register the<a name="line.34"></a> |
| <FONT color="green">035</FONT> * extension namespace. <a name="line.35"></a> |
| <FONT color="green">036</FONT> * <a name="line.36"></a> |
| <FONT color="green">037</FONT> * This mechanism is required to locate extension functions<a name="line.37"></a> |
| <FONT color="green">038</FONT> * that may be embedded within an expression.<a name="line.38"></a> |
| <FONT color="green">039</FONT> */<a name="line.39"></a> |
| <FONT color="green">040</FONT> public class ExpressionVisitor extends XPathVisitor<a name="line.40"></a> |
| <FONT color="green">041</FONT> {<a name="line.41"></a> |
| <FONT color="green">042</FONT> private StylesheetRoot m_sroot;<a name="line.42"></a> |
| <FONT color="green">043</FONT> <a name="line.43"></a> |
| <FONT color="green">044</FONT> /**<a name="line.44"></a> |
| <FONT color="green">045</FONT> * The constructor sets the StylesheetRoot variable which<a name="line.45"></a> |
| <FONT color="green">046</FONT> * is used to register extension namespaces.<a name="line.46"></a> |
| <FONT color="green">047</FONT> * @param sroot the StylesheetRoot that is being constructed.<a name="line.47"></a> |
| <FONT color="green">048</FONT> */<a name="line.48"></a> |
| <FONT color="green">049</FONT> public ExpressionVisitor (StylesheetRoot sroot)<a name="line.49"></a> |
| <FONT color="green">050</FONT> {<a name="line.50"></a> |
| <FONT color="green">051</FONT> m_sroot = sroot;<a name="line.51"></a> |
| <FONT color="green">052</FONT> }<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> * If the function is an extension function, register the namespace.<a name="line.55"></a> |
| <FONT color="green">056</FONT> * <a name="line.56"></a> |
| <FONT color="green">057</FONT> * @param owner The current XPath object that owns the expression.<a name="line.57"></a> |
| <FONT color="green">058</FONT> * @param func The function currently being visited.<a name="line.58"></a> |
| <FONT color="green">059</FONT> * <a name="line.59"></a> |
| <FONT color="green">060</FONT> * @return true to continue the visit in the subtree, if any.<a name="line.60"></a> |
| <FONT color="green">061</FONT> */<a name="line.61"></a> |
| <FONT color="green">062</FONT> public boolean visitFunction(ExpressionOwner owner, Function func)<a name="line.62"></a> |
| <FONT color="green">063</FONT> {<a name="line.63"></a> |
| <FONT color="green">064</FONT> if (func instanceof FuncExtFunction)<a name="line.64"></a> |
| <FONT color="green">065</FONT> {<a name="line.65"></a> |
| <FONT color="green">066</FONT> String namespace = ((FuncExtFunction)func).getNamespace();<a name="line.66"></a> |
| <FONT color="green">067</FONT> m_sroot.getExtensionNamespacesManager().registerExtension(namespace); <a name="line.67"></a> |
| <FONT color="green">068</FONT> }<a name="line.68"></a> |
| <FONT color="green">069</FONT> else if (func instanceof FuncExtFunctionAvailable)<a name="line.69"></a> |
| <FONT color="green">070</FONT> {<a name="line.70"></a> |
| <FONT color="green">071</FONT> String arg = ((FuncExtFunctionAvailable)func).getArg0().toString();<a name="line.71"></a> |
| <FONT color="green">072</FONT> if (arg.indexOf(":") > 0)<a name="line.72"></a> |
| <FONT color="green">073</FONT> {<a name="line.73"></a> |
| <FONT color="green">074</FONT> String prefix = arg.substring(0,arg.indexOf(":"));<a name="line.74"></a> |
| <FONT color="green">075</FONT> String namespace = this.m_sroot.getNamespaceForPrefix(prefix);<a name="line.75"></a> |
| <FONT color="green">076</FONT> m_sroot.getExtensionNamespacesManager().registerExtension(namespace);<a name="line.76"></a> |
| <FONT color="green">077</FONT> }<a name="line.77"></a> |
| <FONT color="green">078</FONT> }<a name="line.78"></a> |
| <FONT color="green">079</FONT> return true;<a name="line.79"></a> |
| <FONT color="green">080</FONT> }<a name="line.80"></a> |
| <FONT color="green">081</FONT> <a name="line.81"></a> |
| <FONT color="green">082</FONT> }<a name="line.82"></a> |
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| </PRE> |
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