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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: Variable.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.operations;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import javax.xml.transform.TransformerException;<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.xml.utils.QName;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xpath.Expression;<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.XPath;<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.axes.PathComponent;<a name="line.32"></a> |
| <FONT color="green">033</FONT> import org.apache.xpath.axes.WalkerFactory;<a name="line.33"></a> |
| <FONT color="green">034</FONT> import org.apache.xpath.objects.XNodeSet;<a name="line.34"></a> |
| <FONT color="green">035</FONT> import org.apache.xpath.objects.XObject;<a name="line.35"></a> |
| <FONT color="green">036</FONT> import org.apache.xpath.res.XPATHErrorResources;<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 variable reference expression executer.<a name="line.40"></a> |
| <FONT color="green">041</FONT> */<a name="line.41"></a> |
| <FONT color="green">042</FONT> public class Variable extends Expression implements PathComponent<a name="line.42"></a> |
| <FONT color="green">043</FONT> {<a name="line.43"></a> |
| <FONT color="green">044</FONT> static final long serialVersionUID = -4334975375609297049L;<a name="line.44"></a> |
| <FONT color="green">045</FONT> /** Tell if fixupVariables was called.<a name="line.45"></a> |
| <FONT color="green">046</FONT> * @serial */<a name="line.46"></a> |
| <FONT color="green">047</FONT> private boolean m_fixUpWasCalled = false;<a name="line.47"></a> |
| <FONT color="green">048</FONT> <a name="line.48"></a> |
| <FONT color="green">049</FONT> /** The qualified name of the variable.<a name="line.49"></a> |
| <FONT color="green">050</FONT> * @serial */<a name="line.50"></a> |
| <FONT color="green">051</FONT> protected QName m_qname;<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> * The index of the variable, which is either an absolute index to a <a name="line.54"></a> |
| <FONT color="green">055</FONT> * global, or, if higher than the globals area, must be adjusted by adding <a name="line.55"></a> |
| <FONT color="green">056</FONT> * the offset to the current stack frame.<a name="line.56"></a> |
| <FONT color="green">057</FONT> */<a name="line.57"></a> |
| <FONT color="green">058</FONT> protected int m_index;<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> * Set the index for the variable into the stack. For advanced use only. You <a name="line.61"></a> |
| <FONT color="green">062</FONT> * must know what you are doing to use this.<a name="line.62"></a> |
| <FONT color="green">063</FONT> * <a name="line.63"></a> |
| <FONT color="green">064</FONT> * @param index a global or local index.<a name="line.64"></a> |
| <FONT color="green">065</FONT> */<a name="line.65"></a> |
| <FONT color="green">066</FONT> public void setIndex(int index)<a name="line.66"></a> |
| <FONT color="green">067</FONT> {<a name="line.67"></a> |
| <FONT color="green">068</FONT> m_index = index;<a name="line.68"></a> |
| <FONT color="green">069</FONT> }<a name="line.69"></a> |
| <FONT color="green">070</FONT> <a name="line.70"></a> |
| <FONT color="green">071</FONT> /**<a name="line.71"></a> |
| <FONT color="green">072</FONT> * Set the index for the variable into the stack. For advanced use only.<a name="line.72"></a> |
| <FONT color="green">073</FONT> * <a name="line.73"></a> |
| <FONT color="green">074</FONT> * @return index a global or local index.<a name="line.74"></a> |
| <FONT color="green">075</FONT> */<a name="line.75"></a> |
| <FONT color="green">076</FONT> public int getIndex()<a name="line.76"></a> |
| <FONT color="green">077</FONT> {<a name="line.77"></a> |
| <FONT color="green">078</FONT> return m_index;<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> |
| <FONT color="green">082</FONT> * Set whether or not this is a global reference. For advanced use only.<a name="line.82"></a> |
| <FONT color="green">083</FONT> * <a name="line.83"></a> |
| <FONT color="green">084</FONT> * @param isGlobal true if this should be a global variable reference.<a name="line.84"></a> |
| <FONT color="green">085</FONT> */<a name="line.85"></a> |
| <FONT color="green">086</FONT> public void setIsGlobal(boolean isGlobal)<a name="line.86"></a> |
| <FONT color="green">087</FONT> {<a name="line.87"></a> |
| <FONT color="green">088</FONT> m_isGlobal = isGlobal;<a name="line.88"></a> |
| <FONT color="green">089</FONT> }<a name="line.89"></a> |
| <FONT color="green">090</FONT> <a name="line.90"></a> |
| <FONT color="green">091</FONT> /**<a name="line.91"></a> |
| <FONT color="green">092</FONT> * Set the index for the variable into the stack. For advanced use only.<a name="line.92"></a> |
| <FONT color="green">093</FONT> * <a name="line.93"></a> |
| <FONT color="green">094</FONT> * @return true if this should be a global variable reference.<a name="line.94"></a> |
| <FONT color="green">095</FONT> */<a name="line.95"></a> |
| <FONT color="green">096</FONT> public boolean getGlobal()<a name="line.96"></a> |
| <FONT color="green">097</FONT> {<a name="line.97"></a> |
| <FONT color="green">098</FONT> return m_isGlobal;<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> <a name="line.102"></a> |
| <FONT color="green">103</FONT> <a name="line.103"></a> |
| <FONT color="green">104</FONT> <a name="line.104"></a> |
| <FONT color="green">105</FONT> protected boolean m_isGlobal = false;<a name="line.105"></a> |
| <FONT color="green">106</FONT> <a name="line.106"></a> |
| <FONT color="green">107</FONT> /**<a name="line.107"></a> |
| <FONT color="green">108</FONT> * This function is used to fixup variables from QNames to stack frame <a name="line.108"></a> |
| <FONT color="green">109</FONT> * indexes at stylesheet build time.<a name="line.109"></a> |
| <FONT color="green">110</FONT> * @param vars List of QNames that correspond to variables. This list <a name="line.110"></a> |
| <FONT color="green">111</FONT> * should be searched backwards for the first qualified name that <a name="line.111"></a> |
| <FONT color="green">112</FONT> * corresponds to the variable reference qname. The position of the <a name="line.112"></a> |
| <FONT color="green">113</FONT> * QName in the vector from the start of the vector will be its position <a name="line.113"></a> |
| <FONT color="green">114</FONT> * in the stack frame (but variables above the globalsTop value will need <a name="line.114"></a> |
| <FONT color="green">115</FONT> * to be offset to the current stack frame).<a name="line.115"></a> |
| <FONT color="green">116</FONT> */<a name="line.116"></a> |
| <FONT color="green">117</FONT> public void fixupVariables(java.util.Vector vars, int globalsSize)<a name="line.117"></a> |
| <FONT color="green">118</FONT> {<a name="line.118"></a> |
| <FONT color="green">119</FONT> m_fixUpWasCalled = true;<a name="line.119"></a> |
| <FONT color="green">120</FONT> int sz = vars.size();<a name="line.120"></a> |
| <FONT color="green">121</FONT> <a name="line.121"></a> |
| <FONT color="green">122</FONT> for (int i = vars.size()-1; i >= 0; i--) <a name="line.122"></a> |
| <FONT color="green">123</FONT> {<a name="line.123"></a> |
| <FONT color="green">124</FONT> QName qn = (QName)vars.elementAt(i);<a name="line.124"></a> |
| <FONT color="green">125</FONT> // System.out.println("qn: "+qn);<a name="line.125"></a> |
| <FONT color="green">126</FONT> if(qn.equals(m_qname))<a name="line.126"></a> |
| <FONT color="green">127</FONT> {<a name="line.127"></a> |
| <FONT color="green">128</FONT> <a name="line.128"></a> |
| <FONT color="green">129</FONT> if(i < globalsSize)<a name="line.129"></a> |
| <FONT color="green">130</FONT> {<a name="line.130"></a> |
| <FONT color="green">131</FONT> m_isGlobal = true;<a name="line.131"></a> |
| <FONT color="green">132</FONT> m_index = i;<a name="line.132"></a> |
| <FONT color="green">133</FONT> }<a name="line.133"></a> |
| <FONT color="green">134</FONT> else<a name="line.134"></a> |
| <FONT color="green">135</FONT> {<a name="line.135"></a> |
| <FONT color="green">136</FONT> m_index = i-globalsSize;<a name="line.136"></a> |
| <FONT color="green">137</FONT> }<a name="line.137"></a> |
| <FONT color="green">138</FONT> <a name="line.138"></a> |
| <FONT color="green">139</FONT> return;<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> <a name="line.142"></a> |
| <FONT color="green">143</FONT> java.lang.String msg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_COULD_NOT_FIND_VAR, <a name="line.143"></a> |
| <FONT color="green">144</FONT> new Object[]{m_qname.toString()});<a name="line.144"></a> |
| <FONT color="green">145</FONT> <a name="line.145"></a> |
| <FONT color="green">146</FONT> TransformerException te = new TransformerException(msg, this);<a name="line.146"></a> |
| <FONT color="green">147</FONT> <a name="line.147"></a> |
| <FONT color="green">148</FONT> throw new org.apache.xml.utils.WrappedRuntimeException(te);<a name="line.148"></a> |
| <FONT color="green">149</FONT> <a name="line.149"></a> |
| <FONT color="green">150</FONT> }<a name="line.150"></a> |
| <FONT color="green">151</FONT> <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> * Set the qualified name of the variable.<a name="line.154"></a> |
| <FONT color="green">155</FONT> *<a name="line.155"></a> |
| <FONT color="green">156</FONT> * @param qname Must be a non-null reference to a qualified name.<a name="line.156"></a> |
| <FONT color="green">157</FONT> */<a name="line.157"></a> |
| <FONT color="green">158</FONT> public void setQName(QName qname)<a name="line.158"></a> |
| <FONT color="green">159</FONT> {<a name="line.159"></a> |
| <FONT color="green">160</FONT> m_qname = qname;<a name="line.160"></a> |
| <FONT color="green">161</FONT> }<a name="line.161"></a> |
| <FONT color="green">162</FONT> <a name="line.162"></a> |
| <FONT color="green">163</FONT> /**<a name="line.163"></a> |
| <FONT color="green">164</FONT> * Get the qualified name of the variable.<a name="line.164"></a> |
| <FONT color="green">165</FONT> *<a name="line.165"></a> |
| <FONT color="green">166</FONT> * @return A non-null reference to a qualified name.<a name="line.166"></a> |
| <FONT color="green">167</FONT> */<a name="line.167"></a> |
| <FONT color="green">168</FONT> public QName getQName()<a name="line.168"></a> |
| <FONT color="green">169</FONT> {<a name="line.169"></a> |
| <FONT color="green">170</FONT> return m_qname;<a name="line.170"></a> |
| <FONT color="green">171</FONT> }<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> * Execute an expression in the XPath runtime context, and return the<a name="line.174"></a> |
| <FONT color="green">175</FONT> * result of the expression.<a name="line.175"></a> |
| <FONT color="green">176</FONT> *<a name="line.176"></a> |
| <FONT color="green">177</FONT> *<a name="line.177"></a> |
| <FONT color="green">178</FONT> * @param xctxt The XPath runtime context.<a name="line.178"></a> |
| <FONT color="green">179</FONT> *<a name="line.179"></a> |
| <FONT color="green">180</FONT> * @return The result of the expression in the form of a <code>XObject</code>.<a name="line.180"></a> |
| <FONT color="green">181</FONT> *<a name="line.181"></a> |
| <FONT color="green">182</FONT> * @throws javax.xml.transform.TransformerException if a runtime exception<a name="line.182"></a> |
| <FONT color="green">183</FONT> * occurs.<a name="line.183"></a> |
| <FONT color="green">184</FONT> */<a name="line.184"></a> |
| <FONT color="green">185</FONT> public XObject execute(XPathContext xctxt)<a name="line.185"></a> |
| <FONT color="green">186</FONT> throws javax.xml.transform.TransformerException<a name="line.186"></a> |
| <FONT color="green">187</FONT> {<a name="line.187"></a> |
| <FONT color="green">188</FONT> return execute(xctxt, false);<a name="line.188"></a> |
| <FONT color="green">189</FONT> }<a name="line.189"></a> |
| <FONT color="green">190</FONT> <a name="line.190"></a> |
| <FONT color="green">191</FONT> <a name="line.191"></a> |
| <FONT color="green">192</FONT> /**<a name="line.192"></a> |
| <FONT color="green">193</FONT> * Dereference the variable, and return the reference value. Note that lazy <a name="line.193"></a> |
| <FONT color="green">194</FONT> * evaluation will occur. If a variable within scope is not found, a warning <a name="line.194"></a> |
| <FONT color="green">195</FONT> * will be sent to the error listener, and an empty nodeset will be returned.<a name="line.195"></a> |
| <FONT color="green">196</FONT> *<a name="line.196"></a> |
| <FONT color="green">197</FONT> *<a name="line.197"></a> |
| <FONT color="green">198</FONT> * @param xctxt The runtime execution context.<a name="line.198"></a> |
| <FONT color="green">199</FONT> *<a name="line.199"></a> |
| <FONT color="green">200</FONT> * @return The evaluated variable, or an empty nodeset if not found.<a name="line.200"></a> |
| <FONT color="green">201</FONT> *<a name="line.201"></a> |
| <FONT color="green">202</FONT> * @throws javax.xml.transform.TransformerException<a name="line.202"></a> |
| <FONT color="green">203</FONT> */<a name="line.203"></a> |
| <FONT color="green">204</FONT> public XObject execute(XPathContext xctxt, boolean destructiveOK) throws javax.xml.transform.TransformerException<a name="line.204"></a> |
| <FONT color="green">205</FONT> {<a name="line.205"></a> |
| <FONT color="green">206</FONT> org.apache.xml.utils.PrefixResolver xprefixResolver = xctxt.getNamespaceContext();<a name="line.206"></a> |
| <FONT color="green">207</FONT> <a name="line.207"></a> |
| <FONT color="green">208</FONT> XObject result;<a name="line.208"></a> |
| <FONT color="green">209</FONT> // Is the variable fetched always the same?<a name="line.209"></a> |
| <FONT color="green">210</FONT> // XObject result = xctxt.getVariable(m_qname);<a name="line.210"></a> |
| <FONT color="green">211</FONT> if(m_fixUpWasCalled)<a name="line.211"></a> |
| <FONT color="green">212</FONT> { <a name="line.212"></a> |
| <FONT color="green">213</FONT> if(m_isGlobal)<a name="line.213"></a> |
| <FONT color="green">214</FONT> result = xctxt.getVarStack().getGlobalVariable(xctxt, m_index, destructiveOK);<a name="line.214"></a> |
| <FONT color="green">215</FONT> else<a name="line.215"></a> |
| <FONT color="green">216</FONT> result = xctxt.getVarStack().getLocalVariable(xctxt, m_index, destructiveOK);<a name="line.216"></a> |
| <FONT color="green">217</FONT> } <a name="line.217"></a> |
| <FONT color="green">218</FONT> else { <a name="line.218"></a> |
| <FONT color="green">219</FONT> result = xctxt.getVarStack().getVariableOrParam(xctxt,m_qname);<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> if (null == result)<a name="line.222"></a> |
| <FONT color="green">223</FONT> {<a name="line.223"></a> |
| <FONT color="green">224</FONT> // This should now never happen...<a name="line.224"></a> |
| <FONT color="green">225</FONT> warn(xctxt, XPATHErrorResources.WG_ILLEGAL_VARIABLE_REFERENCE,<a name="line.225"></a> |
| <FONT color="green">226</FONT> new Object[]{ m_qname.getLocalPart() }); //"VariableReference given for variable out "+<a name="line.226"></a> |
| <FONT color="green">227</FONT> // (new RuntimeException()).printStackTrace();<a name="line.227"></a> |
| <FONT color="green">228</FONT> // error(xctxt, XPATHErrorResources.ER_COULDNOT_GET_VAR_NAMED,<a name="line.228"></a> |
| <FONT color="green">229</FONT> // new Object[]{ m_qname.getLocalPart() }); //"Could not get variable named "+varName);<a name="line.229"></a> |
| <FONT color="green">230</FONT> <a name="line.230"></a> |
| <FONT color="green">231</FONT> result = new XNodeSet(xctxt.getDTMManager());<a name="line.231"></a> |
| <FONT color="green">232</FONT> }<a name="line.232"></a> |
| <FONT color="green">233</FONT> <a name="line.233"></a> |
| <FONT color="green">234</FONT> return result;<a name="line.234"></a> |
| <FONT color="green">235</FONT> // }<a name="line.235"></a> |
| <FONT color="green">236</FONT> // else<a name="line.236"></a> |
| <FONT color="green">237</FONT> // {<a name="line.237"></a> |
| <FONT color="green">238</FONT> // // Hack city... big time. This is needed to evaluate xpaths from extensions, <a name="line.238"></a> |
| <FONT color="green">239</FONT> // // pending some bright light going off in my head. Some sort of callback?<a name="line.239"></a> |
| <FONT color="green">240</FONT> // synchronized(this)<a name="line.240"></a> |
| <FONT color="green">241</FONT> // {<a name="line.241"></a> |
| <FONT color="green">242</FONT> // org.apache.xalan.templates.ElemVariable vvar= getElemVariable();<a name="line.242"></a> |
| <FONT color="green">243</FONT> // if(null != vvar)<a name="line.243"></a> |
| <FONT color="green">244</FONT> // {<a name="line.244"></a> |
| <FONT color="green">245</FONT> // m_index = vvar.getIndex();<a name="line.245"></a> |
| <FONT color="green">246</FONT> // m_isGlobal = vvar.getIsTopLevel();<a name="line.246"></a> |
| <FONT color="green">247</FONT> // m_fixUpWasCalled = true;<a name="line.247"></a> |
| <FONT color="green">248</FONT> // return execute(xctxt);<a name="line.248"></a> |
| <FONT color="green">249</FONT> // }<a name="line.249"></a> |
| <FONT color="green">250</FONT> // }<a name="line.250"></a> |
| <FONT color="green">251</FONT> // throw new javax.xml.transform.TransformerException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_VAR_NOT_RESOLVABLE, new Object[]{m_qname.toString()})); //"Variable not resolvable: "+m_qname);<a name="line.251"></a> |
| <FONT color="green">252</FONT> // }<a name="line.252"></a> |
| <FONT color="green">253</FONT> }<a name="line.253"></a> |
| <FONT color="green">254</FONT> <a name="line.254"></a> |
| <FONT color="green">255</FONT> /**<a name="line.255"></a> |
| <FONT color="green">256</FONT> * Get the XSLT ElemVariable that this sub-expression references. In order for <a name="line.256"></a> |
| <FONT color="green">257</FONT> * this to work, the SourceLocator must be the owning ElemTemplateElement.<a name="line.257"></a> |
| <FONT color="green">258</FONT> * @return The dereference to the ElemVariable, or null if not found.<a name="line.258"></a> |
| <FONT color="green">259</FONT> */<a name="line.259"></a> |
| <FONT color="green">260</FONT> public org.apache.xalan.templates.ElemVariable getElemVariable()<a name="line.260"></a> |
| <FONT color="green">261</FONT> {<a name="line.261"></a> |
| <FONT color="green">262</FONT> <a name="line.262"></a> |
| <FONT color="green">263</FONT> // Get the current ElemTemplateElement, and then walk backwards in <a name="line.263"></a> |
| <FONT color="green">264</FONT> // document order, searching <a name="line.264"></a> |
| <FONT color="green">265</FONT> // for an xsl:param element or xsl:variable element that matches our <a name="line.265"></a> |
| <FONT color="green">266</FONT> // qname. If we reach the top level, use the StylesheetRoot's composed<a name="line.266"></a> |
| <FONT color="green">267</FONT> // list of top level variables and parameters.<a name="line.267"></a> |
| <FONT color="green">268</FONT> <a name="line.268"></a> |
| <FONT color="green">269</FONT> org.apache.xalan.templates.ElemVariable vvar = null; <a name="line.269"></a> |
| <FONT color="green">270</FONT> org.apache.xpath.ExpressionNode owner = getExpressionOwner();<a name="line.270"></a> |
| <FONT color="green">271</FONT> <a name="line.271"></a> |
| <FONT color="green">272</FONT> if (null != owner && owner instanceof org.apache.xalan.templates.ElemTemplateElement)<a name="line.272"></a> |
| <FONT color="green">273</FONT> {<a name="line.273"></a> |
| <FONT color="green">274</FONT> <a name="line.274"></a> |
| <FONT color="green">275</FONT> org.apache.xalan.templates.ElemTemplateElement prev = <a name="line.275"></a> |
| <FONT color="green">276</FONT> (org.apache.xalan.templates.ElemTemplateElement) owner;<a name="line.276"></a> |
| <FONT color="green">277</FONT> <a name="line.277"></a> |
| <FONT color="green">278</FONT> if (!(prev instanceof org.apache.xalan.templates.Stylesheet))<a name="line.278"></a> |
| <FONT color="green">279</FONT> { <a name="line.279"></a> |
| <FONT color="green">280</FONT> while ( prev != null && !(prev.getParentNode() instanceof org.apache.xalan.templates.Stylesheet) )<a name="line.280"></a> |
| <FONT color="green">281</FONT> {<a name="line.281"></a> |
| <FONT color="green">282</FONT> org.apache.xalan.templates.ElemTemplateElement savedprev = prev;<a name="line.282"></a> |
| <FONT color="green">283</FONT> <a name="line.283"></a> |
| <FONT color="green">284</FONT> while (null != (prev = prev.getPreviousSiblingElem()))<a name="line.284"></a> |
| <FONT color="green">285</FONT> {<a name="line.285"></a> |
| <FONT color="green">286</FONT> if(prev instanceof org.apache.xalan.templates.ElemVariable)<a name="line.286"></a> |
| <FONT color="green">287</FONT> {<a name="line.287"></a> |
| <FONT color="green">288</FONT> vvar = (org.apache.xalan.templates.ElemVariable) prev;<a name="line.288"></a> |
| <FONT color="green">289</FONT> <a name="line.289"></a> |
| <FONT color="green">290</FONT> if (vvar.getName().equals(m_qname))<a name="line.290"></a> |
| <FONT color="green">291</FONT> {<a name="line.291"></a> |
| <FONT color="green">292</FONT> return vvar;<a name="line.292"></a> |
| <FONT color="green">293</FONT> }<a name="line.293"></a> |
| <FONT color="green">294</FONT> vvar = null; <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> prev = savedprev.getParentElem();<a name="line.297"></a> |
| <FONT color="green">298</FONT> }<a name="line.298"></a> |
| <FONT color="green">299</FONT> }<a name="line.299"></a> |
| <FONT color="green">300</FONT> if (prev != null)<a name="line.300"></a> |
| <FONT color="green">301</FONT> vvar = prev.getStylesheetRoot().getVariableOrParamComposed(m_qname);<a name="line.301"></a> |
| <FONT color="green">302</FONT> }<a name="line.302"></a> |
| <FONT color="green">303</FONT> return vvar;<a name="line.303"></a> |
| <FONT color="green">304</FONT> <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> * Tell if this expression returns a stable number that will not change during <a name="line.308"></a> |
| <FONT color="green">309</FONT> * iterations within the expression. This is used to determine if a proximity <a name="line.309"></a> |
| <FONT color="green">310</FONT> * position predicate can indicate that no more searching has to occur.<a name="line.310"></a> |
| <FONT color="green">311</FONT> * <a name="line.311"></a> |
| <FONT color="green">312</FONT> *<a name="line.312"></a> |
| <FONT color="green">313</FONT> * @return true if the expression represents a stable number.<a name="line.313"></a> |
| <FONT color="green">314</FONT> */<a name="line.314"></a> |
| <FONT color="green">315</FONT> public boolean isStableNumber()<a name="line.315"></a> |
| <FONT color="green">316</FONT> {<a name="line.316"></a> |
| <FONT color="green">317</FONT> return true;<a name="line.317"></a> |
| <FONT color="green">318</FONT> }<a name="line.318"></a> |
| <FONT color="green">319</FONT> <a name="line.319"></a> |
| <FONT color="green">320</FONT> /** <a name="line.320"></a> |
| <FONT color="green">321</FONT> * Get the analysis bits for this walker, as defined in the WalkerFactory.<a name="line.321"></a> |
| <FONT color="green">322</FONT> * @return One of WalkerFactory#BIT_DESCENDANT, etc.<a name="line.322"></a> |
| <FONT color="green">323</FONT> */<a name="line.323"></a> |
| <FONT color="green">324</FONT> public int getAnalysisBits()<a name="line.324"></a> |
| <FONT color="green">325</FONT> {<a name="line.325"></a> |
| <FONT color="green">326</FONT> org.apache.xalan.templates.ElemVariable vvar = getElemVariable();<a name="line.326"></a> |
| <FONT color="green">327</FONT> if(null != vvar)<a name="line.327"></a> |
| <FONT color="green">328</FONT> {<a name="line.328"></a> |
| <FONT color="green">329</FONT> XPath xpath = vvar.getSelect();<a name="line.329"></a> |
| <FONT color="green">330</FONT> if(null != xpath)<a name="line.330"></a> |
| <FONT color="green">331</FONT> {<a name="line.331"></a> |
| <FONT color="green">332</FONT> Expression expr = xpath.getExpression();<a name="line.332"></a> |
| <FONT color="green">333</FONT> if(null != expr && expr instanceof PathComponent)<a name="line.333"></a> |
| <FONT color="green">334</FONT> {<a name="line.334"></a> |
| <FONT color="green">335</FONT> return ((PathComponent)expr).getAnalysisBits();<a name="line.335"></a> |
| <FONT color="green">336</FONT> }<a name="line.336"></a> |
| <FONT color="green">337</FONT> }<a name="line.337"></a> |
| <FONT color="green">338</FONT> }<a name="line.338"></a> |
| <FONT color="green">339</FONT> return WalkerFactory.BIT_FILTER;<a name="line.339"></a> |
| <FONT color="green">340</FONT> }<a name="line.340"></a> |
| <FONT color="green">341</FONT> <a name="line.341"></a> |
| <FONT color="green">342</FONT> <a name="line.342"></a> |
| <FONT color="green">343</FONT> /**<a name="line.343"></a> |
| <FONT color="green">344</FONT> * @see org.apache.xpath.XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)<a name="line.344"></a> |
| <FONT color="green">345</FONT> */<a name="line.345"></a> |
| <FONT color="green">346</FONT> public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)<a name="line.346"></a> |
| <FONT color="green">347</FONT> {<a name="line.347"></a> |
| <FONT color="green">348</FONT> visitor.visitVariableRef(owner, this);<a name="line.348"></a> |
| <FONT color="green">349</FONT> }<a name="line.349"></a> |
| <FONT color="green">350</FONT> /**<a name="line.350"></a> |
| <FONT color="green">351</FONT> * @see Expression#deepEquals(Expression)<a name="line.351"></a> |
| <FONT color="green">352</FONT> */<a name="line.352"></a> |
| <FONT color="green">353</FONT> public boolean deepEquals(Expression expr)<a name="line.353"></a> |
| <FONT color="green">354</FONT> {<a name="line.354"></a> |
| <FONT color="green">355</FONT> if(!isSameClass(expr))<a name="line.355"></a> |
| <FONT color="green">356</FONT> return false;<a name="line.356"></a> |
| <FONT color="green">357</FONT> <a name="line.357"></a> |
| <FONT color="green">358</FONT> if(!m_qname.equals(((Variable)expr).m_qname))<a name="line.358"></a> |
| <FONT color="green">359</FONT> return false;<a name="line.359"></a> |
| <FONT color="green">360</FONT> <a name="line.360"></a> |
| <FONT color="green">361</FONT> // We have to make sure that the qname really references <a name="line.361"></a> |
| <FONT color="green">362</FONT> // the same variable element.<a name="line.362"></a> |
| <FONT color="green">363</FONT> if(getElemVariable() != ((Variable)expr).getElemVariable())<a name="line.363"></a> |
| <FONT color="green">364</FONT> return false;<a name="line.364"></a> |
| <FONT color="green">365</FONT> <a name="line.365"></a> |
| <FONT color="green">366</FONT> return true;<a name="line.366"></a> |
| <FONT color="green">367</FONT> }<a name="line.367"></a> |
| <FONT color="green">368</FONT> <a name="line.368"></a> |
| <FONT color="green">369</FONT> static final java.lang.String PSUEDOVARNAMESPACE = "http://xml.apache.org/xalan/psuedovar";<a name="line.369"></a> |
| <FONT color="green">370</FONT> <a name="line.370"></a> |
| <FONT color="green">371</FONT> /**<a name="line.371"></a> |
| <FONT color="green">372</FONT> * Tell if this is a psuedo variable reference, declared by Xalan instead <a name="line.372"></a> |
| <FONT color="green">373</FONT> * of by the user.<a name="line.373"></a> |
| <FONT color="green">374</FONT> */<a name="line.374"></a> |
| <FONT color="green">375</FONT> public boolean isPsuedoVarRef()<a name="line.375"></a> |
| <FONT color="green">376</FONT> {<a name="line.376"></a> |
| <FONT color="green">377</FONT> java.lang.String ns = m_qname.getNamespaceURI();<a name="line.377"></a> |
| <FONT color="green">378</FONT> if((null != ns) && ns.equals(PSUEDOVARNAMESPACE))<a name="line.378"></a> |
| <FONT color="green">379</FONT> {<a name="line.379"></a> |
| <FONT color="green">380</FONT> if(m_qname.getLocalName().startsWith("#"))<a name="line.380"></a> |
| <FONT color="green">381</FONT> return true;<a name="line.381"></a> |
| <FONT color="green">382</FONT> }<a name="line.382"></a> |
| <FONT color="green">383</FONT> return false;<a name="line.383"></a> |
| <FONT color="green">384</FONT> }<a name="line.384"></a> |
| <FONT color="green">385</FONT> <a name="line.385"></a> |
| <FONT color="green">386</FONT> <a name="line.386"></a> |
| <FONT color="green">387</FONT> }<a name="line.387"></a> |
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| </PRE> |
| </BODY> |
| </HTML> |
