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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: AbsPathChecker.java 468643 2006-10-28 06:56:03Z 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.templates;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import org.apache.xpath.ExpressionOwner;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import org.apache.xpath.XPathVisitor;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.xpath.axes.LocPathIterator;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import org.apache.xpath.functions.FuncCurrent;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xpath.functions.FuncExtFunction;<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> import org.apache.xpath.operations.Variable;<a name="line.29"></a> |
| <FONT color="green">030</FONT> <a name="line.30"></a> |
| <FONT color="green">031</FONT> /**<a name="line.31"></a> |
| <FONT color="green">032</FONT> * This class runs over a path expression that is assumed to be absolute, and <a name="line.32"></a> |
| <FONT color="green">033</FONT> * checks for variables and the like that may make it context dependent.<a name="line.33"></a> |
| <FONT color="green">034</FONT> */<a name="line.34"></a> |
| <FONT color="green">035</FONT> public class AbsPathChecker extends XPathVisitor<a name="line.35"></a> |
| <FONT color="green">036</FONT> {<a name="line.36"></a> |
| <FONT color="green">037</FONT> private boolean m_isAbs = true;<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> * Process the LocPathIterator to see if it contains variables <a name="line.40"></a> |
| <FONT color="green">041</FONT> * or functions that may make it context dependent.<a name="line.41"></a> |
| <FONT color="green">042</FONT> * @param path LocPathIterator that is assumed to be absolute, but needs checking.<a name="line.42"></a> |
| <FONT color="green">043</FONT> * @return true if the path is confirmed to be absolute, false if it <a name="line.43"></a> |
| <FONT color="green">044</FONT> * may contain context dependencies.<a name="line.44"></a> |
| <FONT color="green">045</FONT> */<a name="line.45"></a> |
| <FONT color="green">046</FONT> public boolean checkAbsolute(LocPathIterator path)<a name="line.46"></a> |
| <FONT color="green">047</FONT> {<a name="line.47"></a> |
| <FONT color="green">048</FONT> m_isAbs = true;<a name="line.48"></a> |
| <FONT color="green">049</FONT> path.callVisitors(null, this);<a name="line.49"></a> |
| <FONT color="green">050</FONT> return m_isAbs;<a name="line.50"></a> |
| <FONT color="green">051</FONT> }<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> * Visit a function.<a name="line.54"></a> |
| <FONT color="green">055</FONT> * @param owner The owner of the expression, to which the expression can <a name="line.55"></a> |
| <FONT color="green">056</FONT> * be reset if rewriting takes place.<a name="line.56"></a> |
| <FONT color="green">057</FONT> * @param func The function reference object.<a name="line.57"></a> |
| <FONT color="green">058</FONT> * @return true if the sub expressions should be traversed.<a name="line.58"></a> |
| <FONT color="green">059</FONT> */<a name="line.59"></a> |
| <FONT color="green">060</FONT> public boolean visitFunction(ExpressionOwner owner, Function func)<a name="line.60"></a> |
| <FONT color="green">061</FONT> {<a name="line.61"></a> |
| <FONT color="green">062</FONT> if((func instanceof FuncCurrent) ||<a name="line.62"></a> |
| <FONT color="green">063</FONT> (func instanceof FuncExtFunction))<a name="line.63"></a> |
| <FONT color="green">064</FONT> m_isAbs = false;<a name="line.64"></a> |
| <FONT color="green">065</FONT> return true;<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> /**<a name="line.68"></a> |
| <FONT color="green">069</FONT> * Visit a variable reference.<a name="line.69"></a> |
| <FONT color="green">070</FONT> * @param owner The owner of the expression, to which the expression can <a name="line.70"></a> |
| <FONT color="green">071</FONT> * be reset if rewriting takes place.<a name="line.71"></a> |
| <FONT color="green">072</FONT> * @param var The variable reference object.<a name="line.72"></a> |
| <FONT color="green">073</FONT> * @return true if the sub expressions should be traversed.<a name="line.73"></a> |
| <FONT color="green">074</FONT> */<a name="line.74"></a> |
| <FONT color="green">075</FONT> public boolean visitVariableRef(ExpressionOwner owner, Variable var)<a name="line.75"></a> |
| <FONT color="green">076</FONT> {<a name="line.76"></a> |
| <FONT color="green">077</FONT> m_isAbs = false;<a name="line.77"></a> |
| <FONT color="green">078</FONT> return true;<a name="line.78"></a> |
| <FONT color="green">079</FONT> }<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> |
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| </PRE> |
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