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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: RedundentExprEliminator.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 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.xalan.res.XSLTErrorResources;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xml.utils.QName;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xml.utils.WrappedRuntimeException;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.xpath.Expression;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xpath.ExpressionNode;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import org.apache.xpath.ExpressionOwner;<a name="line.31"></a> |
| <FONT color="green">032</FONT> import org.apache.xpath.XPath;<a name="line.32"></a> |
| <FONT color="green">033</FONT> import org.apache.xpath.axes.AxesWalker;<a name="line.33"></a> |
| <FONT color="green">034</FONT> import org.apache.xpath.axes.FilterExprIteratorSimple;<a name="line.34"></a> |
| <FONT color="green">035</FONT> import org.apache.xpath.axes.FilterExprWalker;<a name="line.35"></a> |
| <FONT color="green">036</FONT> import org.apache.xpath.axes.LocPathIterator;<a name="line.36"></a> |
| <FONT color="green">037</FONT> import org.apache.xpath.axes.SelfIteratorNoPredicate;<a name="line.37"></a> |
| <FONT color="green">038</FONT> import org.apache.xpath.axes.WalkerFactory;<a name="line.38"></a> |
| <FONT color="green">039</FONT> import org.apache.xpath.axes.WalkingIterator;<a name="line.39"></a> |
| <FONT color="green">040</FONT> import org.apache.xpath.operations.Variable;<a name="line.40"></a> |
| <FONT color="green">041</FONT> import org.apache.xpath.operations.VariableSafeAbsRef;<a name="line.41"></a> |
| <FONT color="green">042</FONT> <a name="line.42"></a> |
| <FONT color="green">043</FONT> /**<a name="line.43"></a> |
| <FONT color="green">044</FONT> * This class eleminates redundent XPaths from a given subtree, <a name="line.44"></a> |
| <FONT color="green">045</FONT> * and also collects all absolute paths within the subtree. First <a name="line.45"></a> |
| <FONT color="green">046</FONT> * it must be called as a visitor to the subtree, and then <a name="line.46"></a> |
| <FONT color="green">047</FONT> * eleminateRedundent must be called.<a name="line.47"></a> |
| <FONT color="green">048</FONT> */<a name="line.48"></a> |
| <FONT color="green">049</FONT> public class RedundentExprEliminator extends XSLTVisitor<a name="line.49"></a> |
| <FONT color="green">050</FONT> {<a name="line.50"></a> |
| <FONT color="green">051</FONT> Vector m_paths;<a name="line.51"></a> |
| <FONT color="green">052</FONT> Vector m_absPaths;<a name="line.52"></a> |
| <FONT color="green">053</FONT> boolean m_isSameContext;<a name="line.53"></a> |
| <FONT color="green">054</FONT> AbsPathChecker m_absPathChecker = new AbsPathChecker();<a name="line.54"></a> |
| <FONT color="green">055</FONT> <a name="line.55"></a> |
| <FONT color="green">056</FONT> private static int m_uniquePseudoVarID = 1;<a name="line.56"></a> |
| <FONT color="green">057</FONT> static final String PSUEDOVARNAMESPACE = Constants.S_VENDORURL+"/xalan/psuedovar";<a name="line.57"></a> |
| <FONT color="green">058</FONT> <a name="line.58"></a> |
| <FONT color="green">059</FONT> public static final boolean DEBUG = false;<a name="line.59"></a> |
| <FONT color="green">060</FONT> public static final boolean DIAGNOSE_NUM_PATHS_REDUCED = false;<a name="line.60"></a> |
| <FONT color="green">061</FONT> public static final boolean DIAGNOSE_MULTISTEPLIST = false;<a name="line.61"></a> |
| <FONT color="green">062</FONT> <a name="line.62"></a> |
| <FONT color="green">063</FONT> /**<a name="line.63"></a> |
| <FONT color="green">064</FONT> * So we can reuse it over and over again.<a name="line.64"></a> |
| <FONT color="green">065</FONT> */<a name="line.65"></a> |
| <FONT color="green">066</FONT> VarNameCollector m_varNameCollector = new VarNameCollector();<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> * Construct a RedundentExprEliminator.<a name="line.69"></a> |
| <FONT color="green">070</FONT> */<a name="line.70"></a> |
| <FONT color="green">071</FONT> public RedundentExprEliminator()<a name="line.71"></a> |
| <FONT color="green">072</FONT> {<a name="line.72"></a> |
| <FONT color="green">073</FONT> m_isSameContext = true;<a name="line.73"></a> |
| <FONT color="green">074</FONT> m_absPaths = new Vector();<a name="line.74"></a> |
| <FONT color="green">075</FONT> m_paths = null;<a name="line.75"></a> |
| <FONT color="green">076</FONT> }<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> /**<a name="line.79"></a> |
| <FONT color="green">080</FONT> * Method to be called after the all expressions within an <a name="line.80"></a> |
| <FONT color="green">081</FONT> * node context have been visited. It eliminates redundent <a name="line.81"></a> |
| <FONT color="green">082</FONT> * expressions by creating a variable in the psuedoVarRecipient <a name="line.82"></a> |
| <FONT color="green">083</FONT> * for each redundent expression, and then rewriting the redundent <a name="line.83"></a> |
| <FONT color="green">084</FONT> * expression to be a variable reference.<a name="line.84"></a> |
| <FONT color="green">085</FONT> * <a name="line.85"></a> |
| <FONT color="green">086</FONT> * @param psuedoVarRecipient The recipient of the psuedo vars. The <a name="line.86"></a> |
| <FONT color="green">087</FONT> * variables will be inserted as first children of the element, before <a name="line.87"></a> |
| <FONT color="green">088</FONT> * any existing variables.<a name="line.88"></a> |
| <FONT color="green">089</FONT> */<a name="line.89"></a> |
| <FONT color="green">090</FONT> public void eleminateRedundentLocals(ElemTemplateElement psuedoVarRecipient)<a name="line.90"></a> |
| <FONT color="green">091</FONT> {<a name="line.91"></a> |
| <FONT color="green">092</FONT> eleminateRedundent(psuedoVarRecipient, m_paths);<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> * Method to be called after the all global expressions within a stylesheet <a name="line.96"></a> |
| <FONT color="green">097</FONT> * have been collected. It eliminates redundent <a name="line.97"></a> |
| <FONT color="green">098</FONT> * expressions by creating a variable in the psuedoVarRecipient <a name="line.98"></a> |
| <FONT color="green">099</FONT> * for each redundent expression, and then rewriting the redundent <a name="line.99"></a> |
| <FONT color="green">100</FONT> * expression to be a variable reference.<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> public void eleminateRedundentGlobals(StylesheetRoot stylesheet)<a name="line.103"></a> |
| <FONT color="green">104</FONT> {<a name="line.104"></a> |
| <FONT color="green">105</FONT> eleminateRedundent(stylesheet, m_absPaths);<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> <a name="line.108"></a> |
| <FONT color="green">109</FONT> /**<a name="line.109"></a> |
| <FONT color="green">110</FONT> * Method to be called after the all expressions within an <a name="line.110"></a> |
| <FONT color="green">111</FONT> * node context have been visited. It eliminates redundent <a name="line.111"></a> |
| <FONT color="green">112</FONT> * expressions by creating a variable in the psuedoVarRecipient <a name="line.112"></a> |
| <FONT color="green">113</FONT> * for each redundent expression, and then rewriting the redundent <a name="line.113"></a> |
| <FONT color="green">114</FONT> * expression to be a variable reference.<a name="line.114"></a> |
| <FONT color="green">115</FONT> * <a name="line.115"></a> |
| <FONT color="green">116</FONT> * @param psuedoVarRecipient The owner of the subtree from where the <a name="line.116"></a> |
| <FONT color="green">117</FONT> * paths were collected.<a name="line.117"></a> |
| <FONT color="green">118</FONT> * @param paths A vector of paths that hold ExpressionOwner objects, <a name="line.118"></a> |
| <FONT color="green">119</FONT> * which must yield LocationPathIterators.<a name="line.119"></a> |
| <FONT color="green">120</FONT> */<a name="line.120"></a> |
| <FONT color="green">121</FONT> protected void eleminateRedundent(ElemTemplateElement psuedoVarRecipient, Vector paths)<a name="line.121"></a> |
| <FONT color="green">122</FONT> {<a name="line.122"></a> |
| <FONT color="green">123</FONT> int n = paths.size();<a name="line.123"></a> |
| <FONT color="green">124</FONT> int numPathsEliminated = 0;<a name="line.124"></a> |
| <FONT color="green">125</FONT> int numUniquePathsEliminated = 0;<a name="line.125"></a> |
| <FONT color="green">126</FONT> for (int i = 0; i < n; i++)<a name="line.126"></a> |
| <FONT color="green">127</FONT> {<a name="line.127"></a> |
| <FONT color="green">128</FONT> ExpressionOwner owner = (ExpressionOwner) paths.elementAt(i);<a name="line.128"></a> |
| <FONT color="green">129</FONT> if (null != owner)<a name="line.129"></a> |
| <FONT color="green">130</FONT> {<a name="line.130"></a> |
| <FONT color="green">131</FONT> int found = findAndEliminateRedundant(i + 1, i, owner, psuedoVarRecipient, paths);<a name="line.131"></a> |
| <FONT color="green">132</FONT> if (found > 0)<a name="line.132"></a> |
| <FONT color="green">133</FONT> numUniquePathsEliminated++;<a name="line.133"></a> |
| <FONT color="green">134</FONT> numPathsEliminated += found;<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> <a name="line.137"></a> |
| <FONT color="green">138</FONT> eleminateSharedPartialPaths(psuedoVarRecipient, paths);<a name="line.138"></a> |
| <FONT color="green">139</FONT> <a name="line.139"></a> |
| <FONT color="green">140</FONT> if(DIAGNOSE_NUM_PATHS_REDUCED)<a name="line.140"></a> |
| <FONT color="green">141</FONT> diagnoseNumPaths(paths, numPathsEliminated, numUniquePathsEliminated);<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> * Eliminate the shared partial paths in the expression list.<a name="line.145"></a> |
| <FONT color="green">146</FONT> * <a name="line.146"></a> |
| <FONT color="green">147</FONT> * @param psuedoVarRecipient The recipient of the psuedo vars.<a name="line.147"></a> |
| <FONT color="green">148</FONT> * <a name="line.148"></a> |
| <FONT color="green">149</FONT> * @param paths A vector of paths that hold ExpressionOwner objects, <a name="line.149"></a> |
| <FONT color="green">150</FONT> * which must yield LocationPathIterators.<a name="line.150"></a> |
| <FONT color="green">151</FONT> */<a name="line.151"></a> |
| <FONT color="green">152</FONT> protected void eleminateSharedPartialPaths(ElemTemplateElement psuedoVarRecipient, Vector paths)<a name="line.152"></a> |
| <FONT color="green">153</FONT> {<a name="line.153"></a> |
| <FONT color="green">154</FONT> MultistepExprHolder list = createMultistepExprList(paths);<a name="line.154"></a> |
| <FONT color="green">155</FONT> if(null != list)<a name="line.155"></a> |
| <FONT color="green">156</FONT> {<a name="line.156"></a> |
| <FONT color="green">157</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.157"></a> |
| <FONT color="green">158</FONT> list.diagnose();<a name="line.158"></a> |
| <FONT color="green">159</FONT> <a name="line.159"></a> |
| <FONT color="green">160</FONT> boolean isGlobal = (paths == m_absPaths);<a name="line.160"></a> |
| <FONT color="green">161</FONT> <a name="line.161"></a> |
| <FONT color="green">162</FONT> // Iterate over the list, starting with the most number of paths, <a name="line.162"></a> |
| <FONT color="green">163</FONT> // trying to find the longest matches first.<a name="line.163"></a> |
| <FONT color="green">164</FONT> int longestStepsCount = list.m_stepCount;<a name="line.164"></a> |
| <FONT color="green">165</FONT> for (int i = longestStepsCount-1; i >= 1; i--)<a name="line.165"></a> |
| <FONT color="green">166</FONT> {<a name="line.166"></a> |
| <FONT color="green">167</FONT> MultistepExprHolder next = list;<a name="line.167"></a> |
| <FONT color="green">168</FONT> while(null != next)<a name="line.168"></a> |
| <FONT color="green">169</FONT> {<a name="line.169"></a> |
| <FONT color="green">170</FONT> if(next.m_stepCount < i)<a name="line.170"></a> |
| <FONT color="green">171</FONT> break;<a name="line.171"></a> |
| <FONT color="green">172</FONT> list = matchAndEliminatePartialPaths(next, list, isGlobal, i, psuedoVarRecipient);<a name="line.172"></a> |
| <FONT color="green">173</FONT> next = next.m_next;<a name="line.173"></a> |
| <FONT color="green">174</FONT> }<a name="line.174"></a> |
| <FONT color="green">175</FONT> }<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> <a name="line.178"></a> |
| <FONT color="green">179</FONT> /**<a name="line.179"></a> |
| <FONT color="green">180</FONT> * For a given path, see if there are any partitial matches in the list, <a name="line.180"></a> |
| <FONT color="green">181</FONT> * and, if there are, replace those partial paths with psuedo variable refs,<a name="line.181"></a> |
| <FONT color="green">182</FONT> * and create the psuedo variable decl.<a name="line.182"></a> |
| <FONT color="green">183</FONT> * <a name="line.183"></a> |
| <FONT color="green">184</FONT> * @return The head of the list, which may have changed.<a name="line.184"></a> |
| <FONT color="green">185</FONT> */<a name="line.185"></a> |
| <FONT color="green">186</FONT> protected MultistepExprHolder matchAndEliminatePartialPaths(MultistepExprHolder testee, <a name="line.186"></a> |
| <FONT color="green">187</FONT> MultistepExprHolder head,<a name="line.187"></a> |
| <FONT color="green">188</FONT> boolean isGlobal,<a name="line.188"></a> |
| <FONT color="green">189</FONT> int lengthToTest,<a name="line.189"></a> |
| <FONT color="green">190</FONT> ElemTemplateElement varScope)<a name="line.190"></a> |
| <FONT color="green">191</FONT> { <a name="line.191"></a> |
| <FONT color="green">192</FONT> if(null == testee.m_exprOwner)<a name="line.192"></a> |
| <FONT color="green">193</FONT> return head;<a name="line.193"></a> |
| <FONT color="green">194</FONT> <a name="line.194"></a> |
| <FONT color="green">195</FONT> // Start with the longest possible match, and move down.<a name="line.195"></a> |
| <FONT color="green">196</FONT> WalkingIterator iter1 = (WalkingIterator) testee.m_exprOwner.getExpression();<a name="line.196"></a> |
| <FONT color="green">197</FONT> if(partialIsVariable(testee, lengthToTest))<a name="line.197"></a> |
| <FONT color="green">198</FONT> return head;<a name="line.198"></a> |
| <FONT color="green">199</FONT> MultistepExprHolder matchedPaths = null;<a name="line.199"></a> |
| <FONT color="green">200</FONT> MultistepExprHolder matchedPathsTail = null;<a name="line.200"></a> |
| <FONT color="green">201</FONT> MultistepExprHolder meh = head;<a name="line.201"></a> |
| <FONT color="green">202</FONT> while( null != meh)<a name="line.202"></a> |
| <FONT color="green">203</FONT> {<a name="line.203"></a> |
| <FONT color="green">204</FONT> if ((meh != testee) && (null != meh.m_exprOwner))<a name="line.204"></a> |
| <FONT color="green">205</FONT> {<a name="line.205"></a> |
| <FONT color="green">206</FONT> WalkingIterator iter2 = (WalkingIterator) meh.m_exprOwner.getExpression();<a name="line.206"></a> |
| <FONT color="green">207</FONT> if (stepsEqual(iter1, iter2, lengthToTest))<a name="line.207"></a> |
| <FONT color="green">208</FONT> {<a name="line.208"></a> |
| <FONT color="green">209</FONT> if (null == matchedPaths)<a name="line.209"></a> |
| <FONT color="green">210</FONT> {<a name="line.210"></a> |
| <FONT color="green">211</FONT> try<a name="line.211"></a> |
| <FONT color="green">212</FONT> {<a name="line.212"></a> |
| <FONT color="green">213</FONT> matchedPaths = (MultistepExprHolder)testee.clone();<a name="line.213"></a> |
| <FONT color="green">214</FONT> testee.m_exprOwner = null; // So it won't be processed again.<a name="line.214"></a> |
| <FONT color="green">215</FONT> }<a name="line.215"></a> |
| <FONT color="green">216</FONT> catch(CloneNotSupportedException cnse){}<a name="line.216"></a> |
| <FONT color="green">217</FONT> matchedPathsTail = matchedPaths;<a name="line.217"></a> |
| <FONT color="green">218</FONT> matchedPathsTail.m_next = null;<a name="line.218"></a> |
| <FONT color="green">219</FONT> }<a name="line.219"></a> |
| <FONT color="green">220</FONT> <a name="line.220"></a> |
| <FONT color="green">221</FONT> try<a name="line.221"></a> |
| <FONT color="green">222</FONT> {<a name="line.222"></a> |
| <FONT color="green">223</FONT> matchedPathsTail.m_next = (MultistepExprHolder)meh.clone();<a name="line.223"></a> |
| <FONT color="green">224</FONT> meh.m_exprOwner = null; // So it won't be processed again.<a name="line.224"></a> |
| <FONT color="green">225</FONT> }<a name="line.225"></a> |
| <FONT color="green">226</FONT> catch(CloneNotSupportedException cnse){}<a name="line.226"></a> |
| <FONT color="green">227</FONT> matchedPathsTail = matchedPathsTail.m_next;<a name="line.227"></a> |
| <FONT color="green">228</FONT> matchedPathsTail.m_next = null;<a name="line.228"></a> |
| <FONT color="green">229</FONT> }<a name="line.229"></a> |
| <FONT color="green">230</FONT> }<a name="line.230"></a> |
| <FONT color="green">231</FONT> meh = meh.m_next;<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> int matchCount = 0;<a name="line.234"></a> |
| <FONT color="green">235</FONT> if(null != matchedPaths)<a name="line.235"></a> |
| <FONT color="green">236</FONT> {<a name="line.236"></a> |
| <FONT color="green">237</FONT> ElemTemplateElement root = isGlobal ? varScope : findCommonAncestor(matchedPaths);<a name="line.237"></a> |
| <FONT color="green">238</FONT> WalkingIterator sharedIter = (WalkingIterator)matchedPaths.m_exprOwner.getExpression();<a name="line.238"></a> |
| <FONT color="green">239</FONT> WalkingIterator newIter = createIteratorFromSteps(sharedIter, lengthToTest);<a name="line.239"></a> |
| <FONT color="green">240</FONT> ElemVariable var = createPseudoVarDecl(root, newIter, isGlobal);<a name="line.240"></a> |
| <FONT color="green">241</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.241"></a> |
| <FONT color="green">242</FONT> System.err.println("Created var: "+var.getName()+(isGlobal ? "(Global)" : ""));<a name="line.242"></a> |
| <FONT color="green">243</FONT> while(null != matchedPaths)<a name="line.243"></a> |
| <FONT color="green">244</FONT> {<a name="line.244"></a> |
| <FONT color="green">245</FONT> ExpressionOwner owner = matchedPaths.m_exprOwner;<a name="line.245"></a> |
| <FONT color="green">246</FONT> WalkingIterator iter = (WalkingIterator)owner.getExpression();<a name="line.246"></a> |
| <FONT color="green">247</FONT> <a name="line.247"></a> |
| <FONT color="green">248</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.248"></a> |
| <FONT color="green">249</FONT> diagnoseLineNumber(iter);<a name="line.249"></a> |
| <FONT color="green">250</FONT> <a name="line.250"></a> |
| <FONT color="green">251</FONT> LocPathIterator newIter2 = <a name="line.251"></a> |
| <FONT color="green">252</FONT> changePartToRef(var.getName(), iter, lengthToTest, isGlobal);<a name="line.252"></a> |
| <FONT color="green">253</FONT> owner.setExpression(newIter2);<a name="line.253"></a> |
| <FONT color="green">254</FONT> <a name="line.254"></a> |
| <FONT color="green">255</FONT> matchedPaths = matchedPaths.m_next;<a name="line.255"></a> |
| <FONT color="green">256</FONT> }<a name="line.256"></a> |
| <FONT color="green">257</FONT> }<a name="line.257"></a> |
| <FONT color="green">258</FONT> <a name="line.258"></a> |
| <FONT color="green">259</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.259"></a> |
| <FONT color="green">260</FONT> diagnoseMultistepList(matchCount, lengthToTest, isGlobal);<a name="line.260"></a> |
| <FONT color="green">261</FONT> return head;<a name="line.261"></a> |
| <FONT color="green">262</FONT> }<a name="line.262"></a> |
| <FONT color="green">263</FONT> <a name="line.263"></a> |
| <FONT color="green">264</FONT> /**<a name="line.264"></a> |
| <FONT color="green">265</FONT> * Check if results of partial reduction will just be a variable, in <a name="line.265"></a> |
| <FONT color="green">266</FONT> * which case, skip it.<a name="line.266"></a> |
| <FONT color="green">267</FONT> */<a name="line.267"></a> |
| <FONT color="green">268</FONT> boolean partialIsVariable(MultistepExprHolder testee, int lengthToTest)<a name="line.268"></a> |
| <FONT color="green">269</FONT> {<a name="line.269"></a> |
| <FONT color="green">270</FONT> if(1 == lengthToTest)<a name="line.270"></a> |
| <FONT color="green">271</FONT> {<a name="line.271"></a> |
| <FONT color="green">272</FONT> WalkingIterator wi = (WalkingIterator)testee.m_exprOwner.getExpression();<a name="line.272"></a> |
| <FONT color="green">273</FONT> if(wi.getFirstWalker() instanceof FilterExprWalker)<a name="line.273"></a> |
| <FONT color="green">274</FONT> return true;<a name="line.274"></a> |
| <FONT color="green">275</FONT> }<a name="line.275"></a> |
| <FONT color="green">276</FONT> return false;<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> * Tell what line number belongs to a given expression.<a name="line.280"></a> |
| <FONT color="green">281</FONT> */<a name="line.281"></a> |
| <FONT color="green">282</FONT> protected void diagnoseLineNumber(Expression expr)<a name="line.282"></a> |
| <FONT color="green">283</FONT> {<a name="line.283"></a> |
| <FONT color="green">284</FONT> ElemTemplateElement e = getElemFromExpression(expr);<a name="line.284"></a> |
| <FONT color="green">285</FONT> System.err.println(" " + e.getSystemId() + " Line " + e.getLineNumber());<a name="line.285"></a> |
| <FONT color="green">286</FONT> }<a name="line.286"></a> |
| <FONT color="green">287</FONT> <a name="line.287"></a> |
| <FONT color="green">288</FONT> /**<a name="line.288"></a> |
| <FONT color="green">289</FONT> * Given a linked list of expressions, find the common ancestor that is <a name="line.289"></a> |
| <FONT color="green">290</FONT> * suitable for holding a psuedo variable for shared access.<a name="line.290"></a> |
| <FONT color="green">291</FONT> */<a name="line.291"></a> |
| <FONT color="green">292</FONT> protected ElemTemplateElement findCommonAncestor(MultistepExprHolder head)<a name="line.292"></a> |
| <FONT color="green">293</FONT> {<a name="line.293"></a> |
| <FONT color="green">294</FONT> // Not sure this algorithm is the best, but will do for the moment.<a name="line.294"></a> |
| <FONT color="green">295</FONT> int numExprs = head.getLength();<a name="line.295"></a> |
| <FONT color="green">296</FONT> // The following could be made cheaper by pre-allocating large arrays, <a name="line.296"></a> |
| <FONT color="green">297</FONT> // but then we would have to assume a max number of reductions, <a name="line.297"></a> |
| <FONT color="green">298</FONT> // which I am not inclined to do right now.<a name="line.298"></a> |
| <FONT color="green">299</FONT> ElemTemplateElement[] elems = new ElemTemplateElement[numExprs];<a name="line.299"></a> |
| <FONT color="green">300</FONT> int[] ancestorCounts = new int[numExprs];<a name="line.300"></a> |
| <FONT color="green">301</FONT> <a name="line.301"></a> |
| <FONT color="green">302</FONT> // Loop through, getting the parent elements, and counting the <a name="line.302"></a> |
| <FONT color="green">303</FONT> // ancestors.<a name="line.303"></a> |
| <FONT color="green">304</FONT> MultistepExprHolder next = head;<a name="line.304"></a> |
| <FONT color="green">305</FONT> int shortestAncestorCount = 10000;<a name="line.305"></a> |
| <FONT color="green">306</FONT> for(int i = 0; i < numExprs; i++)<a name="line.306"></a> |
| <FONT color="green">307</FONT> {<a name="line.307"></a> |
| <FONT color="green">308</FONT> ElemTemplateElement elem = <a name="line.308"></a> |
| <FONT color="green">309</FONT> getElemFromExpression(next.m_exprOwner.getExpression());<a name="line.309"></a> |
| <FONT color="green">310</FONT> elems[i] = elem;<a name="line.310"></a> |
| <FONT color="green">311</FONT> int numAncestors = countAncestors(elem);<a name="line.311"></a> |
| <FONT color="green">312</FONT> ancestorCounts[i] = numAncestors;<a name="line.312"></a> |
| <FONT color="green">313</FONT> if(numAncestors < shortestAncestorCount)<a name="line.313"></a> |
| <FONT color="green">314</FONT> {<a name="line.314"></a> |
| <FONT color="green">315</FONT> shortestAncestorCount = numAncestors;<a name="line.315"></a> |
| <FONT color="green">316</FONT> }<a name="line.316"></a> |
| <FONT color="green">317</FONT> next = next.m_next;<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> // Now loop through and "correct" the elements that have more ancestors.<a name="line.320"></a> |
| <FONT color="green">321</FONT> for(int i = 0; i < numExprs; i++)<a name="line.321"></a> |
| <FONT color="green">322</FONT> {<a name="line.322"></a> |
| <FONT color="green">323</FONT> if(ancestorCounts[i] > shortestAncestorCount)<a name="line.323"></a> |
| <FONT color="green">324</FONT> {<a name="line.324"></a> |
| <FONT color="green">325</FONT> int numStepCorrection = ancestorCounts[i] - shortestAncestorCount;<a name="line.325"></a> |
| <FONT color="green">326</FONT> for(int j = 0; j < numStepCorrection; j++)<a name="line.326"></a> |
| <FONT color="green">327</FONT> {<a name="line.327"></a> |
| <FONT color="green">328</FONT> elems[i] = elems[i].getParentElem();<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> }<a name="line.331"></a> |
| <FONT color="green">332</FONT> <a name="line.332"></a> |
| <FONT color="green">333</FONT> // Now everyone has an equal number of ancestors. Walk up from here <a name="line.333"></a> |
| <FONT color="green">334</FONT> // equally until all are equal.<a name="line.334"></a> |
| <FONT color="green">335</FONT> ElemTemplateElement first = null;<a name="line.335"></a> |
| <FONT color="green">336</FONT> while(shortestAncestorCount-- >= 0)<a name="line.336"></a> |
| <FONT color="green">337</FONT> {<a name="line.337"></a> |
| <FONT color="green">338</FONT> boolean areEqual = true;<a name="line.338"></a> |
| <FONT color="green">339</FONT> first = elems[0];<a name="line.339"></a> |
| <FONT color="green">340</FONT> for(int i = 1; i < numExprs; i++)<a name="line.340"></a> |
| <FONT color="green">341</FONT> {<a name="line.341"></a> |
| <FONT color="green">342</FONT> if(first != elems[i])<a name="line.342"></a> |
| <FONT color="green">343</FONT> {<a name="line.343"></a> |
| <FONT color="green">344</FONT> areEqual = false;<a name="line.344"></a> |
| <FONT color="green">345</FONT> break;<a name="line.345"></a> |
| <FONT color="green">346</FONT> }<a name="line.346"></a> |
| <FONT color="green">347</FONT> }<a name="line.347"></a> |
| <FONT color="green">348</FONT> // This second check is to make sure we have a common ancestor that is not the same <a name="line.348"></a> |
| <FONT color="green">349</FONT> // as the expression owner... i.e. the var decl has to go above the expression owner.<a name="line.349"></a> |
| <FONT color="green">350</FONT> if(areEqual && isNotSameAsOwner(head, first) && first.canAcceptVariables())<a name="line.350"></a> |
| <FONT color="green">351</FONT> {<a name="line.351"></a> |
| <FONT color="green">352</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.352"></a> |
| <FONT color="green">353</FONT> {<a name="line.353"></a> |
| <FONT color="green">354</FONT> System.err.print(first.getClass().getName());<a name="line.354"></a> |
| <FONT color="green">355</FONT> System.err.println(" at " + first.getSystemId() + " Line " + first.getLineNumber());<a name="line.355"></a> |
| <FONT color="green">356</FONT> }<a name="line.356"></a> |
| <FONT color="green">357</FONT> return first;<a name="line.357"></a> |
| <FONT color="green">358</FONT> }<a name="line.358"></a> |
| <FONT color="green">359</FONT> <a name="line.359"></a> |
| <FONT color="green">360</FONT> for(int i = 0; i < numExprs; i++)<a name="line.360"></a> |
| <FONT color="green">361</FONT> {<a name="line.361"></a> |
| <FONT color="green">362</FONT> elems[i] = elems[i].getParentElem();<a name="line.362"></a> |
| <FONT color="green">363</FONT> }<a name="line.363"></a> |
| <FONT color="green">364</FONT> }<a name="line.364"></a> |
| <FONT color="green">365</FONT> <a name="line.365"></a> |
| <FONT color="green">366</FONT> assertion(false, "Could not find common ancestor!!!");<a name="line.366"></a> |
| <FONT color="green">367</FONT> return null;<a name="line.367"></a> |
| <FONT color="green">368</FONT> }<a name="line.368"></a> |
| <FONT color="green">369</FONT> <a name="line.369"></a> |
| <FONT color="green">370</FONT> /**<a name="line.370"></a> |
| <FONT color="green">371</FONT> * Find out if the given ElemTemplateElement is not the same as one of <a name="line.371"></a> |
| <FONT color="green">372</FONT> * the ElemTemplateElement owners of the expressions.<a name="line.372"></a> |
| <FONT color="green">373</FONT> * <a name="line.373"></a> |
| <FONT color="green">374</FONT> * @param head Head of linked list of expression owners.<a name="line.374"></a> |
| <FONT color="green">375</FONT> * @param ete The ElemTemplateElement that is a candidate for a psuedo <a name="line.375"></a> |
| <FONT color="green">376</FONT> * variable parent.<a name="line.376"></a> |
| <FONT color="green">377</FONT> * @return true if the given ElemTemplateElement is not the same as one of <a name="line.377"></a> |
| <FONT color="green">378</FONT> * the ElemTemplateElement owners of the expressions. This is to make sure <a name="line.378"></a> |
| <FONT color="green">379</FONT> * we find an ElemTemplateElement that is in a viable position to hold <a name="line.379"></a> |
| <FONT color="green">380</FONT> * psuedo variables that are visible to the references.<a name="line.380"></a> |
| <FONT color="green">381</FONT> */<a name="line.381"></a> |
| <FONT color="green">382</FONT> protected boolean isNotSameAsOwner(MultistepExprHolder head, ElemTemplateElement ete)<a name="line.382"></a> |
| <FONT color="green">383</FONT> {<a name="line.383"></a> |
| <FONT color="green">384</FONT> MultistepExprHolder next = head;<a name="line.384"></a> |
| <FONT color="green">385</FONT> while(null != next)<a name="line.385"></a> |
| <FONT color="green">386</FONT> {<a name="line.386"></a> |
| <FONT color="green">387</FONT> ElemTemplateElement elemOwner = getElemFromExpression(next.m_exprOwner.getExpression());<a name="line.387"></a> |
| <FONT color="green">388</FONT> if(elemOwner == ete)<a name="line.388"></a> |
| <FONT color="green">389</FONT> return false;<a name="line.389"></a> |
| <FONT color="green">390</FONT> next = next.m_next;<a name="line.390"></a> |
| <FONT color="green">391</FONT> }<a name="line.391"></a> |
| <FONT color="green">392</FONT> return true;<a name="line.392"></a> |
| <FONT color="green">393</FONT> }<a name="line.393"></a> |
| <FONT color="green">394</FONT> <a name="line.394"></a> |
| <FONT color="green">395</FONT> /**<a name="line.395"></a> |
| <FONT color="green">396</FONT> * Count the number of ancestors that a ElemTemplateElement has.<a name="line.396"></a> |
| <FONT color="green">397</FONT> * <a name="line.397"></a> |
| <FONT color="green">398</FONT> * @param elem An representation of an element in an XSLT stylesheet.<a name="line.398"></a> |
| <FONT color="green">399</FONT> * @return The number of ancestors of elem (including the element itself).<a name="line.399"></a> |
| <FONT color="green">400</FONT> */<a name="line.400"></a> |
| <FONT color="green">401</FONT> protected int countAncestors(ElemTemplateElement elem)<a name="line.401"></a> |
| <FONT color="green">402</FONT> {<a name="line.402"></a> |
| <FONT color="green">403</FONT> int count = 0;<a name="line.403"></a> |
| <FONT color="green">404</FONT> while(null != elem)<a name="line.404"></a> |
| <FONT color="green">405</FONT> {<a name="line.405"></a> |
| <FONT color="green">406</FONT> count++;<a name="line.406"></a> |
| <FONT color="green">407</FONT> elem = elem.getParentElem();<a name="line.407"></a> |
| <FONT color="green">408</FONT> }<a name="line.408"></a> |
| <FONT color="green">409</FONT> return count;<a name="line.409"></a> |
| <FONT color="green">410</FONT> }<a name="line.410"></a> |
| <FONT color="green">411</FONT> <a name="line.411"></a> |
| <FONT color="green">412</FONT> /**<a name="line.412"></a> |
| <FONT color="green">413</FONT> * Print out diagnostics about partial multistep evaluation.<a name="line.413"></a> |
| <FONT color="green">414</FONT> */<a name="line.414"></a> |
| <FONT color="green">415</FONT> protected void diagnoseMultistepList(<a name="line.415"></a> |
| <FONT color="green">416</FONT> int matchCount,<a name="line.416"></a> |
| <FONT color="green">417</FONT> int lengthToTest,<a name="line.417"></a> |
| <FONT color="green">418</FONT> boolean isGlobal)<a name="line.418"></a> |
| <FONT color="green">419</FONT> {<a name="line.419"></a> |
| <FONT color="green">420</FONT> if (matchCount > 0)<a name="line.420"></a> |
| <FONT color="green">421</FONT> {<a name="line.421"></a> |
| <FONT color="green">422</FONT> System.err.print(<a name="line.422"></a> |
| <FONT color="green">423</FONT> "Found multistep matches: " + matchCount + ", " + lengthToTest + " length");<a name="line.423"></a> |
| <FONT color="green">424</FONT> if (isGlobal)<a name="line.424"></a> |
| <FONT color="green">425</FONT> System.err.println(" (global)");<a name="line.425"></a> |
| <FONT color="green">426</FONT> else<a name="line.426"></a> |
| <FONT color="green">427</FONT> System.err.println();<a name="line.427"></a> |
| <FONT color="green">428</FONT> }<a name="line.428"></a> |
| <FONT color="green">429</FONT> }<a name="line.429"></a> |
| <FONT color="green">430</FONT> <a name="line.430"></a> |
| <FONT color="green">431</FONT> /**<a name="line.431"></a> |
| <FONT color="green">432</FONT> * Change a given number of steps to a single variable reference.<a name="line.432"></a> |
| <FONT color="green">433</FONT> * <a name="line.433"></a> |
| <FONT color="green">434</FONT> * @param uniquePseudoVarName The name of the variable reference.<a name="line.434"></a> |
| <FONT color="green">435</FONT> * @param wi The walking iterator that is to be changed.<a name="line.435"></a> |
| <FONT color="green">436</FONT> * @param numSteps The number of steps to be changed.<a name="line.436"></a> |
| <FONT color="green">437</FONT> * @param isGlobal true if this will be a global reference.<a name="line.437"></a> |
| <FONT color="green">438</FONT> */<a name="line.438"></a> |
| <FONT color="green">439</FONT> protected LocPathIterator changePartToRef(final QName uniquePseudoVarName, WalkingIterator wi, <a name="line.439"></a> |
| <FONT color="green">440</FONT> final int numSteps, final boolean isGlobal)<a name="line.440"></a> |
| <FONT color="green">441</FONT> {<a name="line.441"></a> |
| <FONT color="green">442</FONT> Variable var = new Variable();<a name="line.442"></a> |
| <FONT color="green">443</FONT> var.setQName(uniquePseudoVarName);<a name="line.443"></a> |
| <FONT color="green">444</FONT> var.setIsGlobal(isGlobal);<a name="line.444"></a> |
| <FONT color="green">445</FONT> if(isGlobal)<a name="line.445"></a> |
| <FONT color="green">446</FONT> { ElemTemplateElement elem = getElemFromExpression(wi);<a name="line.446"></a> |
| <FONT color="green">447</FONT> StylesheetRoot root = elem.getStylesheetRoot();<a name="line.447"></a> |
| <FONT color="green">448</FONT> Vector vars = root.getVariablesAndParamsComposed();<a name="line.448"></a> |
| <FONT color="green">449</FONT> var.setIndex(vars.size()-1);<a name="line.449"></a> |
| <FONT color="green">450</FONT> }<a name="line.450"></a> |
| <FONT color="green">451</FONT> <a name="line.451"></a> |
| <FONT color="green">452</FONT> // Walk to the first walker after the one's we are replacing.<a name="line.452"></a> |
| <FONT color="green">453</FONT> AxesWalker walker = wi.getFirstWalker();<a name="line.453"></a> |
| <FONT color="green">454</FONT> for(int i = 0; i < numSteps; i++)<a name="line.454"></a> |
| <FONT color="green">455</FONT> {<a name="line.455"></a> |
| <FONT color="green">456</FONT> assertion(null != walker, "Walker should not be null!");<a name="line.456"></a> |
| <FONT color="green">457</FONT> walker = walker.getNextWalker();<a name="line.457"></a> |
| <FONT color="green">458</FONT> }<a name="line.458"></a> |
| <FONT color="green">459</FONT> <a name="line.459"></a> |
| <FONT color="green">460</FONT> if(null != walker)<a name="line.460"></a> |
| <FONT color="green">461</FONT> {<a name="line.461"></a> |
| <FONT color="green">462</FONT> <a name="line.462"></a> |
| <FONT color="green">463</FONT> FilterExprWalker few = new FilterExprWalker(wi);<a name="line.463"></a> |
| <FONT color="green">464</FONT> few.setInnerExpression(var);<a name="line.464"></a> |
| <FONT color="green">465</FONT> few.exprSetParent(wi);<a name="line.465"></a> |
| <FONT color="green">466</FONT> few.setNextWalker(walker);<a name="line.466"></a> |
| <FONT color="green">467</FONT> walker.setPrevWalker(few);<a name="line.467"></a> |
| <FONT color="green">468</FONT> wi.setFirstWalker(few);<a name="line.468"></a> |
| <FONT color="green">469</FONT> return wi;<a name="line.469"></a> |
| <FONT color="green">470</FONT> }<a name="line.470"></a> |
| <FONT color="green">471</FONT> else<a name="line.471"></a> |
| <FONT color="green">472</FONT> {<a name="line.472"></a> |
| <FONT color="green">473</FONT> FilterExprIteratorSimple feis = new FilterExprIteratorSimple(var);<a name="line.473"></a> |
| <FONT color="green">474</FONT> feis.exprSetParent(wi.exprGetParent());<a name="line.474"></a> |
| <FONT color="green">475</FONT> return feis;<a name="line.475"></a> |
| <FONT color="green">476</FONT> }<a name="line.476"></a> |
| <FONT color="green">477</FONT> }<a name="line.477"></a> |
| <FONT color="green">478</FONT> <a name="line.478"></a> |
| <FONT color="green">479</FONT> /**<a name="line.479"></a> |
| <FONT color="green">480</FONT> * Create a new WalkingIterator from the steps in another WalkingIterator.<a name="line.480"></a> |
| <FONT color="green">481</FONT> * <a name="line.481"></a> |
| <FONT color="green">482</FONT> * @param wi The iterator from where the steps will be taken.<a name="line.482"></a> |
| <FONT color="green">483</FONT> * @param numSteps The number of steps from the first to copy into the new <a name="line.483"></a> |
| <FONT color="green">484</FONT> * iterator.<a name="line.484"></a> |
| <FONT color="green">485</FONT> * @return The new iterator.<a name="line.485"></a> |
| <FONT color="green">486</FONT> */<a name="line.486"></a> |
| <FONT color="green">487</FONT> protected WalkingIterator createIteratorFromSteps(final WalkingIterator wi, int numSteps)<a name="line.487"></a> |
| <FONT color="green">488</FONT> {<a name="line.488"></a> |
| <FONT color="green">489</FONT> WalkingIterator newIter = new WalkingIterator(wi.getPrefixResolver());<a name="line.489"></a> |
| <FONT color="green">490</FONT> try<a name="line.490"></a> |
| <FONT color="green">491</FONT> {<a name="line.491"></a> |
| <FONT color="green">492</FONT> AxesWalker walker = (AxesWalker)wi.getFirstWalker().clone();<a name="line.492"></a> |
| <FONT color="green">493</FONT> newIter.setFirstWalker(walker);<a name="line.493"></a> |
| <FONT color="green">494</FONT> walker.setLocPathIterator(newIter);<a name="line.494"></a> |
| <FONT color="green">495</FONT> for(int i = 1; i < numSteps; i++)<a name="line.495"></a> |
| <FONT color="green">496</FONT> {<a name="line.496"></a> |
| <FONT color="green">497</FONT> AxesWalker next = (AxesWalker)walker.getNextWalker().clone();<a name="line.497"></a> |
| <FONT color="green">498</FONT> walker.setNextWalker(next);<a name="line.498"></a> |
| <FONT color="green">499</FONT> next.setLocPathIterator(newIter);<a name="line.499"></a> |
| <FONT color="green">500</FONT> walker = next;<a name="line.500"></a> |
| <FONT color="green">501</FONT> }<a name="line.501"></a> |
| <FONT color="green">502</FONT> walker.setNextWalker(null);<a name="line.502"></a> |
| <FONT color="green">503</FONT> }<a name="line.503"></a> |
| <FONT color="green">504</FONT> catch(CloneNotSupportedException cnse)<a name="line.504"></a> |
| <FONT color="green">505</FONT> {<a name="line.505"></a> |
| <FONT color="green">506</FONT> throw new WrappedRuntimeException(cnse);<a name="line.506"></a> |
| <FONT color="green">507</FONT> }<a name="line.507"></a> |
| <FONT color="green">508</FONT> return newIter;<a name="line.508"></a> |
| <FONT color="green">509</FONT> }<a name="line.509"></a> |
| <FONT color="green">510</FONT> <a name="line.510"></a> |
| <FONT color="green">511</FONT> /**<a name="line.511"></a> |
| <FONT color="green">512</FONT> * Compare a given number of steps between two iterators, to see if they are equal.<a name="line.512"></a> |
| <FONT color="green">513</FONT> * <a name="line.513"></a> |
| <FONT color="green">514</FONT> * @param iter1 The first iterator to compare.<a name="line.514"></a> |
| <FONT color="green">515</FONT> * @param iter2 The second iterator to compare.<a name="line.515"></a> |
| <FONT color="green">516</FONT> * @param numSteps The number of steps to compare.<a name="line.516"></a> |
| <FONT color="green">517</FONT> * @return true If the given number of steps are equal.<a name="line.517"></a> |
| <FONT color="green">518</FONT> * <a name="line.518"></a> |
| <FONT color="green">519</FONT> */<a name="line.519"></a> |
| <FONT color="green">520</FONT> protected boolean stepsEqual(WalkingIterator iter1, WalkingIterator iter2, <a name="line.520"></a> |
| <FONT color="green">521</FONT> int numSteps)<a name="line.521"></a> |
| <FONT color="green">522</FONT> {<a name="line.522"></a> |
| <FONT color="green">523</FONT> AxesWalker aw1 = iter1.getFirstWalker();<a name="line.523"></a> |
| <FONT color="green">524</FONT> AxesWalker aw2 = iter2.getFirstWalker();<a name="line.524"></a> |
| <FONT color="green">525</FONT> <a name="line.525"></a> |
| <FONT color="green">526</FONT> for(int i = 0; (i < numSteps); i++)<a name="line.526"></a> |
| <FONT color="green">527</FONT> {<a name="line.527"></a> |
| <FONT color="green">528</FONT> if((null == aw1) || (null == aw2))<a name="line.528"></a> |
| <FONT color="green">529</FONT> return false;<a name="line.529"></a> |
| <FONT color="green">530</FONT> <a name="line.530"></a> |
| <FONT color="green">531</FONT> if(!aw1.deepEquals(aw2))<a name="line.531"></a> |
| <FONT color="green">532</FONT> return false;<a name="line.532"></a> |
| <FONT color="green">533</FONT> <a name="line.533"></a> |
| <FONT color="green">534</FONT> aw1 = aw1.getNextWalker();<a name="line.534"></a> |
| <FONT color="green">535</FONT> aw2 = aw2.getNextWalker();<a name="line.535"></a> |
| <FONT color="green">536</FONT> }<a name="line.536"></a> |
| <FONT color="green">537</FONT> <a name="line.537"></a> |
| <FONT color="green">538</FONT> assertion((null != aw1) || (null != aw2), "Total match is incorrect!");<a name="line.538"></a> |
| <FONT color="green">539</FONT> <a name="line.539"></a> |
| <FONT color="green">540</FONT> return true;<a name="line.540"></a> |
| <FONT color="green">541</FONT> }<a name="line.541"></a> |
| <FONT color="green">542</FONT> <a name="line.542"></a> |
| <FONT color="green">543</FONT> /**<a name="line.543"></a> |
| <FONT color="green">544</FONT> * For the reduction of location path parts, create a list of all <a name="line.544"></a> |
| <FONT color="green">545</FONT> * the multistep paths with more than one step, sorted by the <a name="line.545"></a> |
| <FONT color="green">546</FONT> * number of steps, with the most steps occuring earlier in the list.<a name="line.546"></a> |
| <FONT color="green">547</FONT> * If the list is only one member, don't bother returning it.<a name="line.547"></a> |
| <FONT color="green">548</FONT> * <a name="line.548"></a> |
| <FONT color="green">549</FONT> * @param paths Vector of ExpressionOwner objects, which may contain null entries. <a name="line.549"></a> |
| <FONT color="green">550</FONT> * The ExpressionOwner objects must own LocPathIterator objects.<a name="line.550"></a> |
| <FONT color="green">551</FONT> * @return null if no multipart paths are found or the list is only of length 1, <a name="line.551"></a> |
| <FONT color="green">552</FONT> * otherwise the first MultistepExprHolder in a linked list of these objects.<a name="line.552"></a> |
| <FONT color="green">553</FONT> */<a name="line.553"></a> |
| <FONT color="green">554</FONT> protected MultistepExprHolder createMultistepExprList(Vector paths)<a name="line.554"></a> |
| <FONT color="green">555</FONT> {<a name="line.555"></a> |
| <FONT color="green">556</FONT> MultistepExprHolder first = null;<a name="line.556"></a> |
| <FONT color="green">557</FONT> int n = paths.size();<a name="line.557"></a> |
| <FONT color="green">558</FONT> for(int i = 0; i < n; i++)<a name="line.558"></a> |
| <FONT color="green">559</FONT> {<a name="line.559"></a> |
| <FONT color="green">560</FONT> ExpressionOwner eo = (ExpressionOwner)paths.elementAt(i);<a name="line.560"></a> |
| <FONT color="green">561</FONT> if(null == eo)<a name="line.561"></a> |
| <FONT color="green">562</FONT> continue;<a name="line.562"></a> |
| <FONT color="green">563</FONT> <a name="line.563"></a> |
| <FONT color="green">564</FONT> // Assuming location path iterators should be OK.<a name="line.564"></a> |
| <FONT color="green">565</FONT> LocPathIterator lpi = (LocPathIterator)eo.getExpression();<a name="line.565"></a> |
| <FONT color="green">566</FONT> int numPaths = countSteps(lpi);<a name="line.566"></a> |
| <FONT color="green">567</FONT> if(numPaths > 1)<a name="line.567"></a> |
| <FONT color="green">568</FONT> {<a name="line.568"></a> |
| <FONT color="green">569</FONT> if(null == first)<a name="line.569"></a> |
| <FONT color="green">570</FONT> first = new MultistepExprHolder(eo, numPaths, null);<a name="line.570"></a> |
| <FONT color="green">571</FONT> else<a name="line.571"></a> |
| <FONT color="green">572</FONT> first = first.addInSortedOrder(eo, numPaths);<a name="line.572"></a> |
| <FONT color="green">573</FONT> }<a name="line.573"></a> |
| <FONT color="green">574</FONT> }<a name="line.574"></a> |
| <FONT color="green">575</FONT> <a name="line.575"></a> |
| <FONT color="green">576</FONT> if((null == first) || (first.getLength() <= 1))<a name="line.576"></a> |
| <FONT color="green">577</FONT> return null;<a name="line.577"></a> |
| <FONT color="green">578</FONT> else<a name="line.578"></a> |
| <FONT color="green">579</FONT> return first;<a name="line.579"></a> |
| <FONT color="green">580</FONT> }<a name="line.580"></a> |
| <FONT color="green">581</FONT> <a name="line.581"></a> |
| <FONT color="green">582</FONT> /**<a name="line.582"></a> |
| <FONT color="green">583</FONT> * Look through the vector from start point, looking for redundant occurances.<a name="line.583"></a> |
| <FONT color="green">584</FONT> * When one or more are found, create a psuedo variable declaration, insert <a name="line.584"></a> |
| <FONT color="green">585</FONT> * it into the stylesheet, and replace the occurance with a reference to <a name="line.585"></a> |
| <FONT color="green">586</FONT> * the psuedo variable. When a redundent variable is found, it's slot in <a name="line.586"></a> |
| <FONT color="green">587</FONT> * the vector will be replaced by null.<a name="line.587"></a> |
| <FONT color="green">588</FONT> * <a name="line.588"></a> |
| <FONT color="green">589</FONT> * @param start The position to start looking in the vector.<a name="line.589"></a> |
| <FONT color="green">590</FONT> * @param firstOccuranceIndex The position of firstOccuranceOwner.<a name="line.590"></a> |
| <FONT color="green">591</FONT> * @param firstOccuranceOwner The owner of the expression we are looking for.<a name="line.591"></a> |
| <FONT color="green">592</FONT> * @param psuedoVarRecipient Where to put the psuedo variables.<a name="line.592"></a> |
| <FONT color="green">593</FONT> * <a name="line.593"></a> |
| <FONT color="green">594</FONT> * @return The number of expression occurances that were modified.<a name="line.594"></a> |
| <FONT color="green">595</FONT> */<a name="line.595"></a> |
| <FONT color="green">596</FONT> protected int findAndEliminateRedundant(int start, int firstOccuranceIndex,<a name="line.596"></a> |
| <FONT color="green">597</FONT> ExpressionOwner firstOccuranceOwner, <a name="line.597"></a> |
| <FONT color="green">598</FONT> ElemTemplateElement psuedoVarRecipient,<a name="line.598"></a> |
| <FONT color="green">599</FONT> Vector paths) <a name="line.599"></a> |
| <FONT color="green">600</FONT> throws org.w3c.dom.DOMException <a name="line.600"></a> |
| <FONT color="green">601</FONT> {<a name="line.601"></a> |
| <FONT color="green">602</FONT> MultistepExprHolder head = null;<a name="line.602"></a> |
| <FONT color="green">603</FONT> MultistepExprHolder tail = null;<a name="line.603"></a> |
| <FONT color="green">604</FONT> int numPathsFound = 0;<a name="line.604"></a> |
| <FONT color="green">605</FONT> int n = paths.size();<a name="line.605"></a> |
| <FONT color="green">606</FONT> <a name="line.606"></a> |
| <FONT color="green">607</FONT> Expression expr1 = firstOccuranceOwner.getExpression();<a name="line.607"></a> |
| <FONT color="green">608</FONT> if(DEBUG)<a name="line.608"></a> |
| <FONT color="green">609</FONT> assertIsLocPathIterator(expr1, firstOccuranceOwner);<a name="line.609"></a> |
| <FONT color="green">610</FONT> boolean isGlobal = (paths == m_absPaths);<a name="line.610"></a> |
| <FONT color="green">611</FONT> LocPathIterator lpi = (LocPathIterator)expr1;<a name="line.611"></a> |
| <FONT color="green">612</FONT> int stepCount = countSteps(lpi);<a name="line.612"></a> |
| <FONT color="green">613</FONT> for(int j = start; j < n; j++)<a name="line.613"></a> |
| <FONT color="green">614</FONT> {<a name="line.614"></a> |
| <FONT color="green">615</FONT> ExpressionOwner owner2 = (ExpressionOwner)paths.elementAt(j);<a name="line.615"></a> |
| <FONT color="green">616</FONT> if(null != owner2)<a name="line.616"></a> |
| <FONT color="green">617</FONT> {<a name="line.617"></a> |
| <FONT color="green">618</FONT> Expression expr2 = owner2.getExpression();<a name="line.618"></a> |
| <FONT color="green">619</FONT> boolean isEqual = expr2.deepEquals(lpi);<a name="line.619"></a> |
| <FONT color="green">620</FONT> if(isEqual)<a name="line.620"></a> |
| <FONT color="green">621</FONT> { <a name="line.621"></a> |
| <FONT color="green">622</FONT> LocPathIterator lpi2 = (LocPathIterator)expr2; <a name="line.622"></a> |
| <FONT color="green">623</FONT> if(null == head)<a name="line.623"></a> |
| <FONT color="green">624</FONT> {<a name="line.624"></a> |
| <FONT color="green">625</FONT> head = new MultistepExprHolder(firstOccuranceOwner, stepCount, null);<a name="line.625"></a> |
| <FONT color="green">626</FONT> tail = head;<a name="line.626"></a> |
| <FONT color="green">627</FONT> numPathsFound++;<a name="line.627"></a> |
| <FONT color="green">628</FONT> }<a name="line.628"></a> |
| <FONT color="green">629</FONT> tail.m_next = new MultistepExprHolder(owner2, stepCount, null);<a name="line.629"></a> |
| <FONT color="green">630</FONT> tail = tail.m_next;<a name="line.630"></a> |
| <FONT color="green">631</FONT> <a name="line.631"></a> |
| <FONT color="green">632</FONT> // Null out the occurance, so we don't have to test it again.<a name="line.632"></a> |
| <FONT color="green">633</FONT> paths.setElementAt(null, j);<a name="line.633"></a> |
| <FONT color="green">634</FONT> <a name="line.634"></a> |
| <FONT color="green">635</FONT> // foundFirst = true;<a name="line.635"></a> |
| <FONT color="green">636</FONT> numPathsFound++;<a name="line.636"></a> |
| <FONT color="green">637</FONT> }<a name="line.637"></a> |
| <FONT color="green">638</FONT> }<a name="line.638"></a> |
| <FONT color="green">639</FONT> }<a name="line.639"></a> |
| <FONT color="green">640</FONT> <a name="line.640"></a> |
| <FONT color="green">641</FONT> // Change all globals in xsl:templates, etc, to global vars no matter what.<a name="line.641"></a> |
| <FONT color="green">642</FONT> if((0 == numPathsFound) && isGlobal)<a name="line.642"></a> |
| <FONT color="green">643</FONT> {<a name="line.643"></a> |
| <FONT color="green">644</FONT> head = new MultistepExprHolder(firstOccuranceOwner, stepCount, null);<a name="line.644"></a> |
| <FONT color="green">645</FONT> numPathsFound++;<a name="line.645"></a> |
| <FONT color="green">646</FONT> }<a name="line.646"></a> |
| <FONT color="green">647</FONT> <a name="line.647"></a> |
| <FONT color="green">648</FONT> if(null != head)<a name="line.648"></a> |
| <FONT color="green">649</FONT> {<a name="line.649"></a> |
| <FONT color="green">650</FONT> ElemTemplateElement root = isGlobal ? psuedoVarRecipient : findCommonAncestor(head);<a name="line.650"></a> |
| <FONT color="green">651</FONT> LocPathIterator sharedIter = (LocPathIterator)head.m_exprOwner.getExpression();<a name="line.651"></a> |
| <FONT color="green">652</FONT> ElemVariable var = createPseudoVarDecl(root, sharedIter, isGlobal);<a name="line.652"></a> |
| <FONT color="green">653</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.653"></a> |
| <FONT color="green">654</FONT> System.err.println("Created var: "+var.getName()+(isGlobal ? "(Global)" : ""));<a name="line.654"></a> |
| <FONT color="green">655</FONT> QName uniquePseudoVarName = var.getName();<a name="line.655"></a> |
| <FONT color="green">656</FONT> while(null != head)<a name="line.656"></a> |
| <FONT color="green">657</FONT> {<a name="line.657"></a> |
| <FONT color="green">658</FONT> ExpressionOwner owner = head.m_exprOwner; <a name="line.658"></a> |
| <FONT color="green">659</FONT> if(DIAGNOSE_MULTISTEPLIST)<a name="line.659"></a> |
| <FONT color="green">660</FONT> diagnoseLineNumber(owner.getExpression());<a name="line.660"></a> |
| <FONT color="green">661</FONT> changeToVarRef(uniquePseudoVarName, owner, paths, root);<a name="line.661"></a> |
| <FONT color="green">662</FONT> head = head.m_next;<a name="line.662"></a> |
| <FONT color="green">663</FONT> }<a name="line.663"></a> |
| <FONT color="green">664</FONT> // Replace the first occurance with the variable's XPath, so <a name="line.664"></a> |
| <FONT color="green">665</FONT> // that further reduction may take place if needed.<a name="line.665"></a> |
| <FONT color="green">666</FONT> paths.setElementAt(var.getSelect(), firstOccuranceIndex);<a name="line.666"></a> |
| <FONT color="green">667</FONT> }<a name="line.667"></a> |
| <FONT color="green">668</FONT> <a name="line.668"></a> |
| <FONT color="green">669</FONT> return numPathsFound;<a name="line.669"></a> |
| <FONT color="green">670</FONT> } <a name="line.670"></a> |
| <FONT color="green">671</FONT> <a name="line.671"></a> |
| <FONT color="green">672</FONT> /**<a name="line.672"></a> |
| <FONT color="green">673</FONT> * To be removed.<a name="line.673"></a> |
| <FONT color="green">674</FONT> */<a name="line.674"></a> |
| <FONT color="green">675</FONT> protected int oldFindAndEliminateRedundant(int start, int firstOccuranceIndex,<a name="line.675"></a> |
| <FONT color="green">676</FONT> ExpressionOwner firstOccuranceOwner, <a name="line.676"></a> |
| <FONT color="green">677</FONT> ElemTemplateElement psuedoVarRecipient,<a name="line.677"></a> |
| <FONT color="green">678</FONT> Vector paths) <a name="line.678"></a> |
| <FONT color="green">679</FONT> throws org.w3c.dom.DOMException <a name="line.679"></a> |
| <FONT color="green">680</FONT> {<a name="line.680"></a> |
| <FONT color="green">681</FONT> QName uniquePseudoVarName = null;<a name="line.681"></a> |
| <FONT color="green">682</FONT> boolean foundFirst = false;<a name="line.682"></a> |
| <FONT color="green">683</FONT> int numPathsFound = 0;<a name="line.683"></a> |
| <FONT color="green">684</FONT> int n = paths.size();<a name="line.684"></a> |
| <FONT color="green">685</FONT> Expression expr1 = firstOccuranceOwner.getExpression();<a name="line.685"></a> |
| <FONT color="green">686</FONT> if(DEBUG)<a name="line.686"></a> |
| <FONT color="green">687</FONT> assertIsLocPathIterator(expr1, firstOccuranceOwner);<a name="line.687"></a> |
| <FONT color="green">688</FONT> boolean isGlobal = (paths == m_absPaths);<a name="line.688"></a> |
| <FONT color="green">689</FONT> LocPathIterator lpi = (LocPathIterator)expr1;<a name="line.689"></a> |
| <FONT color="green">690</FONT> for(int j = start; j < n; j++)<a name="line.690"></a> |
| <FONT color="green">691</FONT> {<a name="line.691"></a> |
| <FONT color="green">692</FONT> ExpressionOwner owner2 = (ExpressionOwner)paths.elementAt(j);<a name="line.692"></a> |
| <FONT color="green">693</FONT> if(null != owner2)<a name="line.693"></a> |
| <FONT color="green">694</FONT> {<a name="line.694"></a> |
| <FONT color="green">695</FONT> Expression expr2 = owner2.getExpression();<a name="line.695"></a> |
| <FONT color="green">696</FONT> boolean isEqual = expr2.deepEquals(lpi);<a name="line.696"></a> |
| <FONT color="green">697</FONT> if(isEqual)<a name="line.697"></a> |
| <FONT color="green">698</FONT> { <a name="line.698"></a> |
| <FONT color="green">699</FONT> LocPathIterator lpi2 = (LocPathIterator)expr2; <a name="line.699"></a> |
| <FONT color="green">700</FONT> if(!foundFirst)<a name="line.700"></a> |
| <FONT color="green">701</FONT> {<a name="line.701"></a> |
| <FONT color="green">702</FONT> foundFirst = true;<a name="line.702"></a> |
| <FONT color="green">703</FONT> // Insert variable decl into psuedoVarRecipient<a name="line.703"></a> |
| <FONT color="green">704</FONT> // We want to insert this into the first legitimate <a name="line.704"></a> |
| <FONT color="green">705</FONT> // position for a variable.<a name="line.705"></a> |
| <FONT color="green">706</FONT> ElemVariable var = createPseudoVarDecl(psuedoVarRecipient, lpi, isGlobal);<a name="line.706"></a> |
| <FONT color="green">707</FONT> if(null == var)<a name="line.707"></a> |
| <FONT color="green">708</FONT> return 0;<a name="line.708"></a> |
| <FONT color="green">709</FONT> uniquePseudoVarName = var.getName();<a name="line.709"></a> |
| <FONT color="green">710</FONT> <a name="line.710"></a> |
| <FONT color="green">711</FONT> changeToVarRef(uniquePseudoVarName, firstOccuranceOwner, <a name="line.711"></a> |
| <FONT color="green">712</FONT> paths, psuedoVarRecipient);<a name="line.712"></a> |
| <FONT color="green">713</FONT> <a name="line.713"></a> |
| <FONT color="green">714</FONT> // Replace the first occurance with the variable's XPath, so <a name="line.714"></a> |
| <FONT color="green">715</FONT> // that further reduction may take place if needed.<a name="line.715"></a> |
| <FONT color="green">716</FONT> paths.setElementAt(var.getSelect(), firstOccuranceIndex);<a name="line.716"></a> |
| <FONT color="green">717</FONT> numPathsFound++;<a name="line.717"></a> |
| <FONT color="green">718</FONT> }<a name="line.718"></a> |
| <FONT color="green">719</FONT> <a name="line.719"></a> |
| <FONT color="green">720</FONT> changeToVarRef(uniquePseudoVarName, owner2, paths, psuedoVarRecipient);<a name="line.720"></a> |
| <FONT color="green">721</FONT> <a name="line.721"></a> |
| <FONT color="green">722</FONT> // Null out the occurance, so we don't have to test it again.<a name="line.722"></a> |
| <FONT color="green">723</FONT> paths.setElementAt(null, j);<a name="line.723"></a> |
| <FONT color="green">724</FONT> <a name="line.724"></a> |
| <FONT color="green">725</FONT> // foundFirst = true;<a name="line.725"></a> |
| <FONT color="green">726</FONT> numPathsFound++;<a name="line.726"></a> |
| <FONT color="green">727</FONT> }<a name="line.727"></a> |
| <FONT color="green">728</FONT> }<a name="line.728"></a> |
| <FONT color="green">729</FONT> }<a name="line.729"></a> |
| <FONT color="green">730</FONT> <a name="line.730"></a> |
| <FONT color="green">731</FONT> // Change all globals in xsl:templates, etc, to global vars no matter what.<a name="line.731"></a> |
| <FONT color="green">732</FONT> if((0 == numPathsFound) && (paths == m_absPaths))<a name="line.732"></a> |
| <FONT color="green">733</FONT> {<a name="line.733"></a> |
| <FONT color="green">734</FONT> ElemVariable var = createPseudoVarDecl(psuedoVarRecipient, lpi, true);<a name="line.734"></a> |
| <FONT color="green">735</FONT> if(null == var)<a name="line.735"></a> |
| <FONT color="green">736</FONT> return 0;<a name="line.736"></a> |
| <FONT color="green">737</FONT> uniquePseudoVarName = var.getName();<a name="line.737"></a> |
| <FONT color="green">738</FONT> changeToVarRef(uniquePseudoVarName, firstOccuranceOwner, paths, psuedoVarRecipient);<a name="line.738"></a> |
| <FONT color="green">739</FONT> paths.setElementAt(var.getSelect(), firstOccuranceIndex);<a name="line.739"></a> |
| <FONT color="green">740</FONT> numPathsFound++;<a name="line.740"></a> |
| <FONT color="green">741</FONT> }<a name="line.741"></a> |
| <FONT color="green">742</FONT> return numPathsFound;<a name="line.742"></a> |
| <FONT color="green">743</FONT> }<a name="line.743"></a> |
| <FONT color="green">744</FONT> <a name="line.744"></a> |
| <FONT color="green">745</FONT> /**<a name="line.745"></a> |
| <FONT color="green">746</FONT> * Count the steps in a given location path.<a name="line.746"></a> |
| <FONT color="green">747</FONT> * <a name="line.747"></a> |
| <FONT color="green">748</FONT> * @param lpi The location path iterator that owns the steps.<a name="line.748"></a> |
| <FONT color="green">749</FONT> * @return The number of steps in the given location path.<a name="line.749"></a> |
| <FONT color="green">750</FONT> */<a name="line.750"></a> |
| <FONT color="green">751</FONT> protected int countSteps(LocPathIterator lpi)<a name="line.751"></a> |
| <FONT color="green">752</FONT> {<a name="line.752"></a> |
| <FONT color="green">753</FONT> if(lpi instanceof WalkingIterator)<a name="line.753"></a> |
| <FONT color="green">754</FONT> {<a name="line.754"></a> |
| <FONT color="green">755</FONT> WalkingIterator wi = (WalkingIterator)lpi;<a name="line.755"></a> |
| <FONT color="green">756</FONT> AxesWalker aw = wi.getFirstWalker();<a name="line.756"></a> |
| <FONT color="green">757</FONT> int count = 0;<a name="line.757"></a> |
| <FONT color="green">758</FONT> while(null != aw)<a name="line.758"></a> |
| <FONT color="green">759</FONT> {<a name="line.759"></a> |
| <FONT color="green">760</FONT> count++;<a name="line.760"></a> |
| <FONT color="green">761</FONT> aw = aw.getNextWalker();<a name="line.761"></a> |
| <FONT color="green">762</FONT> }<a name="line.762"></a> |
| <FONT color="green">763</FONT> return count;<a name="line.763"></a> |
| <FONT color="green">764</FONT> }<a name="line.764"></a> |
| <FONT color="green">765</FONT> else<a name="line.765"></a> |
| <FONT color="green">766</FONT> return 1;<a name="line.766"></a> |
| <FONT color="green">767</FONT> }<a name="line.767"></a> |
| <FONT color="green">768</FONT> <a name="line.768"></a> |
| <FONT color="green">769</FONT> /**<a name="line.769"></a> |
| <FONT color="green">770</FONT> * Change the expression owned by the owner argument to a variable reference <a name="line.770"></a> |
| <FONT color="green">771</FONT> * of the given name.<a name="line.771"></a> |
| <FONT color="green">772</FONT> * <a name="line.772"></a> |
| <FONT color="green">773</FONT> * Warning: For global vars, this function relies on the variable declaration <a name="line.773"></a> |
| <FONT color="green">774</FONT> * to which it refers having been added just prior to this function being called,<a name="line.774"></a> |
| <FONT color="green">775</FONT> * so that the reference index can be determined from the size of the global variables <a name="line.775"></a> |
| <FONT color="green">776</FONT> * list minus one.<a name="line.776"></a> |
| <FONT color="green">777</FONT> * <a name="line.777"></a> |
| <FONT color="green">778</FONT> * @param varName The name of the variable which will be referenced.<a name="line.778"></a> |
| <FONT color="green">779</FONT> * @param owner The owner of the expression which will be replaced by a variable ref.<a name="line.779"></a> |
| <FONT color="green">780</FONT> * @param paths The paths list that the iterator came from, mainly to determine<a name="line.780"></a> |
| <FONT color="green">781</FONT> * if this is a local or global reduction.<a name="line.781"></a> |
| <FONT color="green">782</FONT> * @param psuedoVarRecipient The element within whose scope the variable is <a name="line.782"></a> |
| <FONT color="green">783</FONT> * being inserted, possibly a StylesheetRoot.<a name="line.783"></a> |
| <FONT color="green">784</FONT> */<a name="line.784"></a> |
| <FONT color="green">785</FONT> protected void changeToVarRef(QName varName, ExpressionOwner owner, <a name="line.785"></a> |
| <FONT color="green">786</FONT> Vector paths, ElemTemplateElement psuedoVarRecipient) <a name="line.786"></a> |
| <FONT color="green">787</FONT> {<a name="line.787"></a> |
| <FONT color="green">788</FONT> Variable varRef = (paths == m_absPaths) ? new VariableSafeAbsRef() : new Variable();<a name="line.788"></a> |
| <FONT color="green">789</FONT> varRef.setQName(varName);<a name="line.789"></a> |
| <FONT color="green">790</FONT> if(paths == m_absPaths)<a name="line.790"></a> |
| <FONT color="green">791</FONT> {<a name="line.791"></a> |
| <FONT color="green">792</FONT> StylesheetRoot root = (StylesheetRoot)psuedoVarRecipient;<a name="line.792"></a> |
| <FONT color="green">793</FONT> Vector globalVars = root.getVariablesAndParamsComposed();<a name="line.793"></a> |
| <FONT color="green">794</FONT> // Assume this operation is occuring just after the decl has <a name="line.794"></a> |
| <FONT color="green">795</FONT> // been added.<a name="line.795"></a> |
| <FONT color="green">796</FONT> varRef.setIndex(globalVars.size()-1);<a name="line.796"></a> |
| <FONT color="green">797</FONT> varRef.setIsGlobal(true);<a name="line.797"></a> |
| <FONT color="green">798</FONT> }<a name="line.798"></a> |
| <FONT color="green">799</FONT> owner.setExpression(varRef);<a name="line.799"></a> |
| <FONT color="green">800</FONT> }<a name="line.800"></a> |
| <FONT color="green">801</FONT> <a name="line.801"></a> |
| <FONT color="green">802</FONT> private synchronized static int getPseudoVarID(){<a name="line.802"></a> |
| <FONT color="green">803</FONT> return m_uniquePseudoVarID++; <a name="line.803"></a> |
| <FONT color="green">804</FONT> }<a name="line.804"></a> |
| <FONT color="green">805</FONT> <a name="line.805"></a> |
| <FONT color="green">806</FONT> /**<a name="line.806"></a> |
| <FONT color="green">807</FONT> * Create a psuedo variable reference that will represent the <a name="line.807"></a> |
| <FONT color="green">808</FONT> * shared redundent XPath, and add it to the stylesheet.<a name="line.808"></a> |
| <FONT color="green">809</FONT> * <a name="line.809"></a> |
| <FONT color="green">810</FONT> * @param psuedoVarRecipient The broadest scope of where the variable <a name="line.810"></a> |
| <FONT color="green">811</FONT> * should be inserted, usually an xsl:template or xsl:for-each.<a name="line.811"></a> |
| <FONT color="green">812</FONT> * @param lpi The LocationPathIterator that the variable should represent.<a name="line.812"></a> |
| <FONT color="green">813</FONT> * @param isGlobal true if the paths are global.<a name="line.813"></a> |
| <FONT color="green">814</FONT> * @return The new psuedo var element.<a name="line.814"></a> |
| <FONT color="green">815</FONT> */<a name="line.815"></a> |
| <FONT color="green">816</FONT> protected ElemVariable createPseudoVarDecl(<a name="line.816"></a> |
| <FONT color="green">817</FONT> ElemTemplateElement psuedoVarRecipient,<a name="line.817"></a> |
| <FONT color="green">818</FONT> LocPathIterator lpi, boolean isGlobal)<a name="line.818"></a> |
| <FONT color="green">819</FONT> throws org.w3c.dom.DOMException<a name="line.819"></a> |
| <FONT color="green">820</FONT> {<a name="line.820"></a> |
| <FONT color="green">821</FONT> QName uniquePseudoVarName = new QName (PSUEDOVARNAMESPACE, "#"+getPseudoVarID());<a name="line.821"></a> |
| <FONT color="green">822</FONT> <a name="line.822"></a> |
| <FONT color="green">823</FONT> if(isGlobal)<a name="line.823"></a> |
| <FONT color="green">824</FONT> {<a name="line.824"></a> |
| <FONT color="green">825</FONT> return createGlobalPseudoVarDecl(uniquePseudoVarName, <a name="line.825"></a> |
| <FONT color="green">826</FONT> (StylesheetRoot)psuedoVarRecipient, lpi);<a name="line.826"></a> |
| <FONT color="green">827</FONT> }<a name="line.827"></a> |
| <FONT color="green">828</FONT> else <a name="line.828"></a> |
| <FONT color="green">829</FONT> return createLocalPseudoVarDecl(uniquePseudoVarName, psuedoVarRecipient, lpi);<a name="line.829"></a> |
| <FONT color="green">830</FONT> }<a name="line.830"></a> |
| <FONT color="green">831</FONT> <a name="line.831"></a> |
| <FONT color="green">832</FONT> /**<a name="line.832"></a> |
| <FONT color="green">833</FONT> * Create a psuedo variable reference that will represent the <a name="line.833"></a> |
| <FONT color="green">834</FONT> * shared redundent XPath, for a local reduction.<a name="line.834"></a> |
| <FONT color="green">835</FONT> * <a name="line.835"></a> |
| <FONT color="green">836</FONT> * @param uniquePseudoVarName The name of the new variable.<a name="line.836"></a> |
| <FONT color="green">837</FONT> * @param stylesheetRoot The broadest scope of where the variable <a name="line.837"></a> |
| <FONT color="green">838</FONT> * should be inserted, which must be a StylesheetRoot element in this case.<a name="line.838"></a> |
| <FONT color="green">839</FONT> * @param lpi The LocationPathIterator that the variable should represent.<a name="line.839"></a> |
| <FONT color="green">840</FONT> * @return null if the decl was not created, otherwise the new Pseudo var <a name="line.840"></a> |
| <FONT color="green">841</FONT> * element.<a name="line.841"></a> |
| <FONT color="green">842</FONT> */<a name="line.842"></a> |
| <FONT color="green">843</FONT> protected ElemVariable createGlobalPseudoVarDecl(QName uniquePseudoVarName,<a name="line.843"></a> |
| <FONT color="green">844</FONT> StylesheetRoot stylesheetRoot, <a name="line.844"></a> |
| <FONT color="green">845</FONT> LocPathIterator lpi) <a name="line.845"></a> |
| <FONT color="green">846</FONT> throws org.w3c.dom.DOMException <a name="line.846"></a> |
| <FONT color="green">847</FONT> {<a name="line.847"></a> |
| <FONT color="green">848</FONT> ElemVariable psuedoVar = new ElemVariable();<a name="line.848"></a> |
| <FONT color="green">849</FONT> psuedoVar.setIsTopLevel(true);<a name="line.849"></a> |
| <FONT color="green">850</FONT> XPath xpath = new XPath(lpi);<a name="line.850"></a> |
| <FONT color="green">851</FONT> psuedoVar.setSelect(xpath);<a name="line.851"></a> |
| <FONT color="green">852</FONT> psuedoVar.setName(uniquePseudoVarName);<a name="line.852"></a> |
| <FONT color="green">853</FONT> <a name="line.853"></a> |
| <FONT color="green">854</FONT> Vector globalVars = stylesheetRoot.getVariablesAndParamsComposed();<a name="line.854"></a> |
| <FONT color="green">855</FONT> psuedoVar.setIndex(globalVars.size());<a name="line.855"></a> |
| <FONT color="green">856</FONT> globalVars.addElement(psuedoVar);<a name="line.856"></a> |
| <FONT color="green">857</FONT> return psuedoVar;<a name="line.857"></a> |
| <FONT color="green">858</FONT> }<a name="line.858"></a> |
| <FONT color="green">859</FONT> <a name="line.859"></a> |
| <FONT color="green">860</FONT> <a name="line.860"></a> |
| <FONT color="green">861</FONT> <a name="line.861"></a> |
| <FONT color="green">862</FONT> <a name="line.862"></a> |
| <FONT color="green">863</FONT> /**<a name="line.863"></a> |
| <FONT color="green">864</FONT> * Create a psuedo variable reference that will represent the <a name="line.864"></a> |
| <FONT color="green">865</FONT> * shared redundent XPath, for a local reduction.<a name="line.865"></a> |
| <FONT color="green">866</FONT> * <a name="line.866"></a> |
| <FONT color="green">867</FONT> * @param uniquePseudoVarName The name of the new variable.<a name="line.867"></a> |
| <FONT color="green">868</FONT> * @param psuedoVarRecipient The broadest scope of where the variable <a name="line.868"></a> |
| <FONT color="green">869</FONT> * should be inserted, usually an xsl:template or xsl:for-each.<a name="line.869"></a> |
| <FONT color="green">870</FONT> * @param lpi The LocationPathIterator that the variable should represent.<a name="line.870"></a> |
| <FONT color="green">871</FONT> * @return null if the decl was not created, otherwise the new Pseudo var <a name="line.871"></a> |
| <FONT color="green">872</FONT> * element.<a name="line.872"></a> |
| <FONT color="green">873</FONT> */<a name="line.873"></a> |
| <FONT color="green">874</FONT> protected ElemVariable createLocalPseudoVarDecl(QName uniquePseudoVarName,<a name="line.874"></a> |
| <FONT color="green">875</FONT> ElemTemplateElement psuedoVarRecipient, <a name="line.875"></a> |
| <FONT color="green">876</FONT> LocPathIterator lpi) <a name="line.876"></a> |
| <FONT color="green">877</FONT> throws org.w3c.dom.DOMException <a name="line.877"></a> |
| <FONT color="green">878</FONT> {<a name="line.878"></a> |
| <FONT color="green">879</FONT> ElemVariable psuedoVar = new ElemVariablePsuedo();<a name="line.879"></a> |
| <FONT color="green">880</FONT> <a name="line.880"></a> |
| <FONT color="green">881</FONT> XPath xpath = new XPath(lpi);<a name="line.881"></a> |
| <FONT color="green">882</FONT> psuedoVar.setSelect(xpath);<a name="line.882"></a> |
| <FONT color="green">883</FONT> psuedoVar.setName(uniquePseudoVarName);<a name="line.883"></a> |
| <FONT color="green">884</FONT> <a name="line.884"></a> |
| <FONT color="green">885</FONT> ElemVariable var = addVarDeclToElem(psuedoVarRecipient, lpi, psuedoVar);<a name="line.885"></a> |
| <FONT color="green">886</FONT> <a name="line.886"></a> |
| <FONT color="green">887</FONT> lpi.exprSetParent(var);<a name="line.887"></a> |
| <FONT color="green">888</FONT> <a name="line.888"></a> |
| <FONT color="green">889</FONT> return var;<a name="line.889"></a> |
| <FONT color="green">890</FONT> }<a name="line.890"></a> |
| <FONT color="green">891</FONT> <a name="line.891"></a> |
| <FONT color="green">892</FONT> /**<a name="line.892"></a> |
| <FONT color="green">893</FONT> * Add the given variable to the psuedoVarRecipient.<a name="line.893"></a> |
| <FONT color="green">894</FONT> */<a name="line.894"></a> |
| <FONT color="green">895</FONT> protected ElemVariable addVarDeclToElem(<a name="line.895"></a> |
| <FONT color="green">896</FONT> ElemTemplateElement psuedoVarRecipient,<a name="line.896"></a> |
| <FONT color="green">897</FONT> LocPathIterator lpi,<a name="line.897"></a> |
| <FONT color="green">898</FONT> ElemVariable psuedoVar)<a name="line.898"></a> |
| <FONT color="green">899</FONT> throws org.w3c.dom.DOMException<a name="line.899"></a> |
| <FONT color="green">900</FONT> {<a name="line.900"></a> |
| <FONT color="green">901</FONT> // Create psuedo variable element<a name="line.901"></a> |
| <FONT color="green">902</FONT> ElemTemplateElement ete = psuedoVarRecipient.getFirstChildElem();<a name="line.902"></a> |
| <FONT color="green">903</FONT> <a name="line.903"></a> |
| <FONT color="green">904</FONT> lpi.callVisitors(null, m_varNameCollector);<a name="line.904"></a> |
| <FONT color="green">905</FONT> <a name="line.905"></a> |
| <FONT color="green">906</FONT> // If the location path contains variables, we have to insert the <a name="line.906"></a> |
| <FONT color="green">907</FONT> // psuedo variable after the reference. (Otherwise, we want to <a name="line.907"></a> |
| <FONT color="green">908</FONT> // insert it as close as possible to the top, so we'll be sure <a name="line.908"></a> |
| <FONT color="green">909</FONT> // it is in scope for any other vars.<a name="line.909"></a> |
| <FONT color="green">910</FONT> if (m_varNameCollector.getVarCount() > 0)<a name="line.910"></a> |
| <FONT color="green">911</FONT> {<a name="line.911"></a> |
| <FONT color="green">912</FONT> ElemTemplateElement baseElem = getElemFromExpression(lpi);<a name="line.912"></a> |
| <FONT color="green">913</FONT> ElemVariable varElem = getPrevVariableElem(baseElem);<a name="line.913"></a> |
| <FONT color="green">914</FONT> while (null != varElem)<a name="line.914"></a> |
| <FONT color="green">915</FONT> {<a name="line.915"></a> |
| <FONT color="green">916</FONT> if (m_varNameCollector.doesOccur(varElem.getName()))<a name="line.916"></a> |
| <FONT color="green">917</FONT> {<a name="line.917"></a> |
| <FONT color="green">918</FONT> psuedoVarRecipient = varElem.getParentElem();<a name="line.918"></a> |
| <FONT color="green">919</FONT> ete = varElem.getNextSiblingElem();<a name="line.919"></a> |
| <FONT color="green">920</FONT> break;<a name="line.920"></a> |
| <FONT color="green">921</FONT> }<a name="line.921"></a> |
| <FONT color="green">922</FONT> varElem = getPrevVariableElem(varElem);<a name="line.922"></a> |
| <FONT color="green">923</FONT> }<a name="line.923"></a> |
| <FONT color="green">924</FONT> }<a name="line.924"></a> |
| <FONT color="green">925</FONT> <a name="line.925"></a> |
| <FONT color="green">926</FONT> if ((null != ete) && (Constants.ELEMNAME_PARAMVARIABLE == ete.getXSLToken()))<a name="line.926"></a> |
| <FONT color="green">927</FONT> {<a name="line.927"></a> |
| <FONT color="green">928</FONT> // Can't stick something in front of a param, so abandon! (see variable13.xsl)<a name="line.928"></a> |
| <FONT color="green">929</FONT> if(isParam(lpi))<a name="line.929"></a> |
| <FONT color="green">930</FONT> return null;<a name="line.930"></a> |
| <FONT color="green">931</FONT> <a name="line.931"></a> |
| <FONT color="green">932</FONT> while (null != ete)<a name="line.932"></a> |
| <FONT color="green">933</FONT> {<a name="line.933"></a> |
| <FONT color="green">934</FONT> ete = ete.getNextSiblingElem();<a name="line.934"></a> |
| <FONT color="green">935</FONT> if ((null != ete) && Constants.ELEMNAME_PARAMVARIABLE != ete.getXSLToken())<a name="line.935"></a> |
| <FONT color="green">936</FONT> break;<a name="line.936"></a> |
| <FONT color="green">937</FONT> }<a name="line.937"></a> |
| <FONT color="green">938</FONT> }<a name="line.938"></a> |
| <FONT color="green">939</FONT> psuedoVarRecipient.insertBefore(psuedoVar, ete);<a name="line.939"></a> |
| <FONT color="green">940</FONT> m_varNameCollector.reset();<a name="line.940"></a> |
| <FONT color="green">941</FONT> return psuedoVar;<a name="line.941"></a> |
| <FONT color="green">942</FONT> }<a name="line.942"></a> |
| <FONT color="green">943</FONT> <a name="line.943"></a> |
| <FONT color="green">944</FONT> /**<a name="line.944"></a> |
| <FONT color="green">945</FONT> * Tell if the expr param is contained within an xsl:param.<a name="line.945"></a> |
| <FONT color="green">946</FONT> */<a name="line.946"></a> |
| <FONT color="green">947</FONT> protected boolean isParam(ExpressionNode expr)<a name="line.947"></a> |
| <FONT color="green">948</FONT> {<a name="line.948"></a> |
| <FONT color="green">949</FONT> while(null != expr)<a name="line.949"></a> |
| <FONT color="green">950</FONT> {<a name="line.950"></a> |
| <FONT color="green">951</FONT> if(expr instanceof ElemTemplateElement)<a name="line.951"></a> |
| <FONT color="green">952</FONT> break;<a name="line.952"></a> |
| <FONT color="green">953</FONT> expr = expr.exprGetParent();<a name="line.953"></a> |
| <FONT color="green">954</FONT> }<a name="line.954"></a> |
| <FONT color="green">955</FONT> if(null != expr)<a name="line.955"></a> |
| <FONT color="green">956</FONT> {<a name="line.956"></a> |
| <FONT color="green">957</FONT> ElemTemplateElement ete = (ElemTemplateElement)expr;<a name="line.957"></a> |
| <FONT color="green">958</FONT> while(null != ete)<a name="line.958"></a> |
| <FONT color="green">959</FONT> {<a name="line.959"></a> |
| <FONT color="green">960</FONT> int type = ete.getXSLToken();<a name="line.960"></a> |
| <FONT color="green">961</FONT> switch(type)<a name="line.961"></a> |
| <FONT color="green">962</FONT> {<a name="line.962"></a> |
| <FONT color="green">963</FONT> case Constants.ELEMNAME_PARAMVARIABLE:<a name="line.963"></a> |
| <FONT color="green">964</FONT> return true;<a name="line.964"></a> |
| <FONT color="green">965</FONT> case Constants.ELEMNAME_TEMPLATE:<a name="line.965"></a> |
| <FONT color="green">966</FONT> case Constants.ELEMNAME_STYLESHEET:<a name="line.966"></a> |
| <FONT color="green">967</FONT> return false;<a name="line.967"></a> |
| <FONT color="green">968</FONT> }<a name="line.968"></a> |
| <FONT color="green">969</FONT> ete = ete.getParentElem();<a name="line.969"></a> |
| <FONT color="green">970</FONT> }<a name="line.970"></a> |
| <FONT color="green">971</FONT> }<a name="line.971"></a> |
| <FONT color="green">972</FONT> return false;<a name="line.972"></a> |
| <FONT color="green">973</FONT> <a name="line.973"></a> |
| <FONT color="green">974</FONT> }<a name="line.974"></a> |
| <FONT color="green">975</FONT> <a name="line.975"></a> |
| <FONT color="green">976</FONT> /**<a name="line.976"></a> |
| <FONT color="green">977</FONT> * Find the previous occurance of a xsl:variable. Stop <a name="line.977"></a> |
| <FONT color="green">978</FONT> * the search when a xsl:for-each, xsl:template, or xsl:stylesheet is <a name="line.978"></a> |
| <FONT color="green">979</FONT> * encountered.<a name="line.979"></a> |
| <FONT color="green">980</FONT> * <a name="line.980"></a> |
| <FONT color="green">981</FONT> * @param elem Should be non-null template element.<a name="line.981"></a> |
| <FONT color="green">982</FONT> * @return The first previous occurance of an xsl:variable or xsl:param, <a name="line.982"></a> |
| <FONT color="green">983</FONT> * or null if none is found.<a name="line.983"></a> |
| <FONT color="green">984</FONT> */<a name="line.984"></a> |
| <FONT color="green">985</FONT> protected ElemVariable getPrevVariableElem(ElemTemplateElement elem)<a name="line.985"></a> |
| <FONT color="green">986</FONT> {<a name="line.986"></a> |
| <FONT color="green">987</FONT> // This could be somewhat optimized. since getPreviousSiblingElem is a <a name="line.987"></a> |
| <FONT color="green">988</FONT> // fairly expensive operation.<a name="line.988"></a> |
| <FONT color="green">989</FONT> while(null != (elem = getPrevElementWithinContext(elem)))<a name="line.989"></a> |
| <FONT color="green">990</FONT> {<a name="line.990"></a> |
| <FONT color="green">991</FONT> int type = elem.getXSLToken();<a name="line.991"></a> |
| <FONT color="green">992</FONT> <a name="line.992"></a> |
| <FONT color="green">993</FONT> if((Constants.ELEMNAME_VARIABLE == type) ||<a name="line.993"></a> |
| <FONT color="green">994</FONT> (Constants.ELEMNAME_PARAMVARIABLE == type))<a name="line.994"></a> |
| <FONT color="green">995</FONT> {<a name="line.995"></a> |
| <FONT color="green">996</FONT> return (ElemVariable)elem;<a name="line.996"></a> |
| <FONT color="green">997</FONT> }<a name="line.997"></a> |
| <FONT color="green">998</FONT> }<a name="line.998"></a> |
| <FONT color="green">999</FONT> return null;<a name="line.999"></a> |
| <FONT color="green">1000</FONT> }<a name="line.1000"></a> |
| <FONT color="green">1001</FONT> <a name="line.1001"></a> |
| <FONT color="green">1002</FONT> /**<a name="line.1002"></a> |
| <FONT color="green">1003</FONT> * Get the previous sibling or parent of the given template, stopping at <a name="line.1003"></a> |
| <FONT color="green">1004</FONT> * xsl:for-each, xsl:template, or xsl:stylesheet.<a name="line.1004"></a> |
| <FONT color="green">1005</FONT> * <a name="line.1005"></a> |
| <FONT color="green">1006</FONT> * @param elem Should be non-null template element.<a name="line.1006"></a> |
| <FONT color="green">1007</FONT> * @return previous sibling or parent, or null if previous is xsl:for-each, <a name="line.1007"></a> |
| <FONT color="green">1008</FONT> * xsl:template, or xsl:stylesheet.<a name="line.1008"></a> |
| <FONT color="green">1009</FONT> */<a name="line.1009"></a> |
| <FONT color="green">1010</FONT> protected ElemTemplateElement getPrevElementWithinContext(ElemTemplateElement elem)<a name="line.1010"></a> |
| <FONT color="green">1011</FONT> {<a name="line.1011"></a> |
| <FONT color="green">1012</FONT> ElemTemplateElement prev = elem.getPreviousSiblingElem();<a name="line.1012"></a> |
| <FONT color="green">1013</FONT> if(null == prev)<a name="line.1013"></a> |
| <FONT color="green">1014</FONT> prev = elem.getParentElem();<a name="line.1014"></a> |
| <FONT color="green">1015</FONT> if(null != prev)<a name="line.1015"></a> |
| <FONT color="green">1016</FONT> {<a name="line.1016"></a> |
| <FONT color="green">1017</FONT> int type = prev.getXSLToken();<a name="line.1017"></a> |
| <FONT color="green">1018</FONT> if((Constants.ELEMNAME_FOREACH == type) || <a name="line.1018"></a> |
| <FONT color="green">1019</FONT> (Constants.ELEMNAME_TEMPLATE == type) ||<a name="line.1019"></a> |
| <FONT color="green">1020</FONT> (Constants.ELEMNAME_STYLESHEET == type))<a name="line.1020"></a> |
| <FONT color="green">1021</FONT> {<a name="line.1021"></a> |
| <FONT color="green">1022</FONT> prev = null;<a name="line.1022"></a> |
| <FONT color="green">1023</FONT> }<a name="line.1023"></a> |
| <FONT color="green">1024</FONT> }<a name="line.1024"></a> |
| <FONT color="green">1025</FONT> return prev;<a name="line.1025"></a> |
| <FONT color="green">1026</FONT> }<a name="line.1026"></a> |
| <FONT color="green">1027</FONT> <a name="line.1027"></a> |
| <FONT color="green">1028</FONT> /**<a name="line.1028"></a> |
| <FONT color="green">1029</FONT> * From an XPath expression component, get the ElemTemplateElement <a name="line.1029"></a> |
| <FONT color="green">1030</FONT> * owner.<a name="line.1030"></a> |
| <FONT color="green">1031</FONT> * <a name="line.1031"></a> |
| <FONT color="green">1032</FONT> * @param expr Should be static expression with proper parentage.<a name="line.1032"></a> |
| <FONT color="green">1033</FONT> * @return Valid ElemTemplateElement, or throw a runtime exception <a name="line.1033"></a> |
| <FONT color="green">1034</FONT> * if it is not found.<a name="line.1034"></a> |
| <FONT color="green">1035</FONT> */<a name="line.1035"></a> |
| <FONT color="green">1036</FONT> protected ElemTemplateElement getElemFromExpression(Expression expr)<a name="line.1036"></a> |
| <FONT color="green">1037</FONT> {<a name="line.1037"></a> |
| <FONT color="green">1038</FONT> ExpressionNode parent = expr.exprGetParent();<a name="line.1038"></a> |
| <FONT color="green">1039</FONT> while(null != parent)<a name="line.1039"></a> |
| <FONT color="green">1040</FONT> {<a name="line.1040"></a> |
| <FONT color="green">1041</FONT> if(parent instanceof ElemTemplateElement)<a name="line.1041"></a> |
| <FONT color="green">1042</FONT> return (ElemTemplateElement)parent;<a name="line.1042"></a> |
| <FONT color="green">1043</FONT> parent = parent.exprGetParent();<a name="line.1043"></a> |
| <FONT color="green">1044</FONT> }<a name="line.1044"></a> |
| <FONT color="green">1045</FONT> throw new RuntimeException(XSLMessages.createMessage(XSLTErrorResources.ER_ASSERT_NO_TEMPLATE_PARENT, null));<a name="line.1045"></a> |
| <FONT color="green">1046</FONT> // "Programmer's error! expr has no ElemTemplateElement parent!");<a name="line.1046"></a> |
| <FONT color="green">1047</FONT> }<a name="line.1047"></a> |
| <FONT color="green">1048</FONT> <a name="line.1048"></a> |
| <FONT color="green">1049</FONT> /**<a name="line.1049"></a> |
| <FONT color="green">1050</FONT> * Tell if the given LocPathIterator is relative to an absolute path, i.e. <a name="line.1050"></a> |
| <FONT color="green">1051</FONT> * in not dependent on the context.<a name="line.1051"></a> |
| <FONT color="green">1052</FONT> * <a name="line.1052"></a> |
| <FONT color="green">1053</FONT> * @return true if the LocPathIterator is not dependent on the context node.<a name="line.1053"></a> |
| <FONT color="green">1054</FONT> */<a name="line.1054"></a> |
| <FONT color="green">1055</FONT> public boolean isAbsolute(LocPathIterator path)<a name="line.1055"></a> |
| <FONT color="green">1056</FONT> {<a name="line.1056"></a> |
| <FONT color="green">1057</FONT> int analysis = path.getAnalysisBits();<a name="line.1057"></a> |
| <FONT color="green">1058</FONT> boolean isAbs = (WalkerFactory.isSet(analysis, WalkerFactory.BIT_ROOT) || <a name="line.1058"></a> |
| <FONT color="green">1059</FONT> WalkerFactory.isSet(analysis, WalkerFactory.BIT_ANY_DESCENDANT_FROM_ROOT));<a name="line.1059"></a> |
| <FONT color="green">1060</FONT> if(isAbs)<a name="line.1060"></a> |
| <FONT color="green">1061</FONT> {<a name="line.1061"></a> |
| <FONT color="green">1062</FONT> isAbs = m_absPathChecker.checkAbsolute(path);<a name="line.1062"></a> |
| <FONT color="green">1063</FONT> }<a name="line.1063"></a> |
| <FONT color="green">1064</FONT> return isAbs;<a name="line.1064"></a> |
| <FONT color="green">1065</FONT> }<a name="line.1065"></a> |
| <FONT color="green">1066</FONT> <a name="line.1066"></a> |
| <FONT color="green">1067</FONT> <a name="line.1067"></a> |
| <FONT color="green">1068</FONT> /**<a name="line.1068"></a> |
| <FONT color="green">1069</FONT> * Visit a LocationPath.<a name="line.1069"></a> |
| <FONT color="green">1070</FONT> * @param owner The owner of the expression, to which the expression can <a name="line.1070"></a> |
| <FONT color="green">1071</FONT> * be reset if rewriting takes place.<a name="line.1071"></a> |
| <FONT color="green">1072</FONT> * @param path The LocationPath object.<a name="line.1072"></a> |
| <FONT color="green">1073</FONT> * @return true if the sub expressions should be traversed.<a name="line.1073"></a> |
| <FONT color="green">1074</FONT> */<a name="line.1074"></a> |
| <FONT color="green">1075</FONT> public boolean visitLocationPath(ExpressionOwner owner, LocPathIterator path)<a name="line.1075"></a> |
| <FONT color="green">1076</FONT> {<a name="line.1076"></a> |
| <FONT color="green">1077</FONT> // Don't optimize "." or single step variable paths.<a name="line.1077"></a> |
| <FONT color="green">1078</FONT> // Both of these cases could use some further optimization by themselves.<a name="line.1078"></a> |
| <FONT color="green">1079</FONT> if(path instanceof SelfIteratorNoPredicate)<a name="line.1079"></a> |
| <FONT color="green">1080</FONT> {<a name="line.1080"></a> |
| <FONT color="green">1081</FONT> return true;<a name="line.1081"></a> |
| <FONT color="green">1082</FONT> }<a name="line.1082"></a> |
| <FONT color="green">1083</FONT> else if(path instanceof WalkingIterator)<a name="line.1083"></a> |
| <FONT color="green">1084</FONT> {<a name="line.1084"></a> |
| <FONT color="green">1085</FONT> WalkingIterator wi = (WalkingIterator)path;<a name="line.1085"></a> |
| <FONT color="green">1086</FONT> AxesWalker aw = wi.getFirstWalker();<a name="line.1086"></a> |
| <FONT color="green">1087</FONT> if((aw instanceof FilterExprWalker) && (null == aw.getNextWalker()))<a name="line.1087"></a> |
| <FONT color="green">1088</FONT> {<a name="line.1088"></a> |
| <FONT color="green">1089</FONT> FilterExprWalker few = (FilterExprWalker)aw;<a name="line.1089"></a> |
| <FONT color="green">1090</FONT> Expression exp = few.getInnerExpression();<a name="line.1090"></a> |
| <FONT color="green">1091</FONT> if(exp instanceof Variable)<a name="line.1091"></a> |
| <FONT color="green">1092</FONT> return true;<a name="line.1092"></a> |
| <FONT color="green">1093</FONT> }<a name="line.1093"></a> |
| <FONT color="green">1094</FONT> }<a name="line.1094"></a> |
| <FONT color="green">1095</FONT> <a name="line.1095"></a> |
| <FONT color="green">1096</FONT> if (isAbsolute(path) && (null != m_absPaths))<a name="line.1096"></a> |
| <FONT color="green">1097</FONT> {<a name="line.1097"></a> |
| <FONT color="green">1098</FONT> if(DEBUG)<a name="line.1098"></a> |
| <FONT color="green">1099</FONT> validateNewAddition(m_absPaths, owner, path);<a name="line.1099"></a> |
| <FONT color="green">1100</FONT> m_absPaths.addElement(owner);<a name="line.1100"></a> |
| <FONT color="green">1101</FONT> }<a name="line.1101"></a> |
| <FONT color="green">1102</FONT> else if (m_isSameContext && (null != m_paths))<a name="line.1102"></a> |
| <FONT color="green">1103</FONT> {<a name="line.1103"></a> |
| <FONT color="green">1104</FONT> if(DEBUG)<a name="line.1104"></a> |
| <FONT color="green">1105</FONT> validateNewAddition(m_paths, owner, path);<a name="line.1105"></a> |
| <FONT color="green">1106</FONT> m_paths.addElement(owner);<a name="line.1106"></a> |
| <FONT color="green">1107</FONT> }<a name="line.1107"></a> |
| <FONT color="green">1108</FONT> <a name="line.1108"></a> |
| <FONT color="green">1109</FONT> return true;<a name="line.1109"></a> |
| <FONT color="green">1110</FONT> }<a name="line.1110"></a> |
| <FONT color="green">1111</FONT> <a name="line.1111"></a> |
| <FONT color="green">1112</FONT> /**<a name="line.1112"></a> |
| <FONT color="green">1113</FONT> * Visit a predicate within a location path. Note that there isn't a <a name="line.1113"></a> |
| <FONT color="green">1114</FONT> * proper unique component for predicates, and that the expression will <a name="line.1114"></a> |
| <FONT color="green">1115</FONT> * be called also for whatever type Expression is.<a name="line.1115"></a> |
| <FONT color="green">1116</FONT> * <a name="line.1116"></a> |
| <FONT color="green">1117</FONT> * @param owner The owner of the expression, to which the expression can <a name="line.1117"></a> |
| <FONT color="green">1118</FONT> * be reset if rewriting takes place.<a name="line.1118"></a> |
| <FONT color="green">1119</FONT> * @param pred The predicate object.<a name="line.1119"></a> |
| <FONT color="green">1120</FONT> * @return true if the sub expressions should be traversed.<a name="line.1120"></a> |
| <FONT color="green">1121</FONT> */<a name="line.1121"></a> |
| <FONT color="green">1122</FONT> public boolean visitPredicate(ExpressionOwner owner, Expression pred)<a name="line.1122"></a> |
| <FONT color="green">1123</FONT> {<a name="line.1123"></a> |
| <FONT color="green">1124</FONT> boolean savedIsSame = m_isSameContext;<a name="line.1124"></a> |
| <FONT color="green">1125</FONT> m_isSameContext = false;<a name="line.1125"></a> |
| <FONT color="green">1126</FONT> <a name="line.1126"></a> |
| <FONT color="green">1127</FONT> // Any further down, just collect the absolute paths.<a name="line.1127"></a> |
| <FONT color="green">1128</FONT> pred.callVisitors(owner, this);<a name="line.1128"></a> |
| <FONT color="green">1129</FONT> <a name="line.1129"></a> |
| <FONT color="green">1130</FONT> m_isSameContext = savedIsSame;<a name="line.1130"></a> |
| <FONT color="green">1131</FONT> <a name="line.1131"></a> |
| <FONT color="green">1132</FONT> // We've already gone down the subtree, so don't go have the caller <a name="line.1132"></a> |
| <FONT color="green">1133</FONT> // go any further.<a name="line.1133"></a> |
| <FONT color="green">1134</FONT> return false;<a name="line.1134"></a> |
| <FONT color="green">1135</FONT> }<a name="line.1135"></a> |
| <FONT color="green">1136</FONT> <a name="line.1136"></a> |
| <FONT color="green">1137</FONT> /**<a name="line.1137"></a> |
| <FONT color="green">1138</FONT> * Visit an XSLT top-level instruction.<a name="line.1138"></a> |
| <FONT color="green">1139</FONT> * <a name="line.1139"></a> |
| <FONT color="green">1140</FONT> * @param elem The xsl instruction element object.<a name="line.1140"></a> |
| <FONT color="green">1141</FONT> * @return true if the sub expressions should be traversed.<a name="line.1141"></a> |
| <FONT color="green">1142</FONT> */<a name="line.1142"></a> |
| <FONT color="green">1143</FONT> public boolean visitTopLevelInstruction(ElemTemplateElement elem)<a name="line.1143"></a> |
| <FONT color="green">1144</FONT> {<a name="line.1144"></a> |
| <FONT color="green">1145</FONT> int type = elem.getXSLToken();<a name="line.1145"></a> |
| <FONT color="green">1146</FONT> switch(type)<a name="line.1146"></a> |
| <FONT color="green">1147</FONT> {<a name="line.1147"></a> |
| <FONT color="green">1148</FONT> case Constants.ELEMNAME_TEMPLATE :<a name="line.1148"></a> |
| <FONT color="green">1149</FONT> return visitInstruction(elem);<a name="line.1149"></a> |
| <FONT color="green">1150</FONT> default:<a name="line.1150"></a> |
| <FONT color="green">1151</FONT> return true;<a name="line.1151"></a> |
| <FONT color="green">1152</FONT> }<a name="line.1152"></a> |
| <FONT color="green">1153</FONT> }<a name="line.1153"></a> |
| <FONT color="green">1154</FONT> <a name="line.1154"></a> |
| <FONT color="green">1155</FONT> <a name="line.1155"></a> |
| <FONT color="green">1156</FONT> /**<a name="line.1156"></a> |
| <FONT color="green">1157</FONT> * Visit an XSLT instruction. Any element that isn't called by one <a name="line.1157"></a> |
| <FONT color="green">1158</FONT> * of the other visit methods, will be called by this method.<a name="line.1158"></a> |
| <FONT color="green">1159</FONT> * <a name="line.1159"></a> |
| <FONT color="green">1160</FONT> * @param elem The xsl instruction element object.<a name="line.1160"></a> |
| <FONT color="green">1161</FONT> * @return true if the sub expressions should be traversed.<a name="line.1161"></a> |
| <FONT color="green">1162</FONT> */<a name="line.1162"></a> |
| <FONT color="green">1163</FONT> public boolean visitInstruction(ElemTemplateElement elem)<a name="line.1163"></a> |
| <FONT color="green">1164</FONT> {<a name="line.1164"></a> |
| <FONT color="green">1165</FONT> int type = elem.getXSLToken();<a name="line.1165"></a> |
| <FONT color="green">1166</FONT> switch (type)<a name="line.1166"></a> |
| <FONT color="green">1167</FONT> {<a name="line.1167"></a> |
| <FONT color="green">1168</FONT> case Constants.ELEMNAME_CALLTEMPLATE :<a name="line.1168"></a> |
| <FONT color="green">1169</FONT> case Constants.ELEMNAME_TEMPLATE :<a name="line.1169"></a> |
| <FONT color="green">1170</FONT> case Constants.ELEMNAME_FOREACH :<a name="line.1170"></a> |
| <FONT color="green">1171</FONT> {<a name="line.1171"></a> |
| <FONT color="green">1172</FONT> <a name="line.1172"></a> |
| <FONT color="green">1173</FONT> // Just get the select value.<a name="line.1173"></a> |
| <FONT color="green">1174</FONT> if(type == Constants.ELEMNAME_FOREACH)<a name="line.1174"></a> |
| <FONT color="green">1175</FONT> {<a name="line.1175"></a> |
| <FONT color="green">1176</FONT> ElemForEach efe = (ElemForEach) elem;<a name="line.1176"></a> |
| <FONT color="green">1177</FONT> <a name="line.1177"></a> |
| <FONT color="green">1178</FONT> Expression select = efe.getSelect();<a name="line.1178"></a> |
| <FONT color="green">1179</FONT> select.callVisitors(efe, this);<a name="line.1179"></a> |
| <FONT color="green">1180</FONT> }<a name="line.1180"></a> |
| <FONT color="green">1181</FONT> <a name="line.1181"></a> |
| <FONT color="green">1182</FONT> Vector savedPaths = m_paths;<a name="line.1182"></a> |
| <FONT color="green">1183</FONT> m_paths = new Vector();<a name="line.1183"></a> |
| <FONT color="green">1184</FONT> <a name="line.1184"></a> |
| <FONT color="green">1185</FONT> // Visit children. Call the superclass callChildVisitors, because <a name="line.1185"></a> |
| <FONT color="green">1186</FONT> // we don't want to visit the xsl:for-each select attribute, or, for <a name="line.1186"></a> |
| <FONT color="green">1187</FONT> // that matter, the xsl:template's match attribute.<a name="line.1187"></a> |
| <FONT color="green">1188</FONT> elem.callChildVisitors(this, false); <a name="line.1188"></a> |
| <FONT color="green">1189</FONT> eleminateRedundentLocals(elem);<a name="line.1189"></a> |
| <FONT color="green">1190</FONT> <a name="line.1190"></a> |
| <FONT color="green">1191</FONT> m_paths = savedPaths;<a name="line.1191"></a> |
| <FONT color="green">1192</FONT> <a name="line.1192"></a> |
| <FONT color="green">1193</FONT> // select.callVisitors(efe, this);<a name="line.1193"></a> |
| <FONT color="green">1194</FONT> return false;<a name="line.1194"></a> |
| <FONT color="green">1195</FONT> }<a name="line.1195"></a> |
| <FONT color="green">1196</FONT> case Constants.ELEMNAME_NUMBER :<a name="line.1196"></a> |
| <FONT color="green">1197</FONT> case Constants.ELEMNAME_SORT :<a name="line.1197"></a> |
| <FONT color="green">1198</FONT> // Just collect absolute paths until and unless we can fully<a name="line.1198"></a> |
| <FONT color="green">1199</FONT> // analyze these cases.<a name="line.1199"></a> |
| <FONT color="green">1200</FONT> boolean savedIsSame = m_isSameContext;<a name="line.1200"></a> |
| <FONT color="green">1201</FONT> m_isSameContext = false;<a name="line.1201"></a> |
| <FONT color="green">1202</FONT> elem.callChildVisitors(this);<a name="line.1202"></a> |
| <FONT color="green">1203</FONT> m_isSameContext = savedIsSame;<a name="line.1203"></a> |
| <FONT color="green">1204</FONT> return false;<a name="line.1204"></a> |
| <FONT color="green">1205</FONT> <a name="line.1205"></a> |
| <FONT color="green">1206</FONT> default :<a name="line.1206"></a> |
| <FONT color="green">1207</FONT> return true;<a name="line.1207"></a> |
| <FONT color="green">1208</FONT> }<a name="line.1208"></a> |
| <FONT color="green">1209</FONT> }<a name="line.1209"></a> |
| <FONT color="green">1210</FONT> <a name="line.1210"></a> |
| <FONT color="green">1211</FONT> // ==== DIAGNOSTIC AND DEBUG FUNCTIONS ====<a name="line.1211"></a> |
| <FONT color="green">1212</FONT> <a name="line.1212"></a> |
| <FONT color="green">1213</FONT> /**<a name="line.1213"></a> |
| <FONT color="green">1214</FONT> * Print out to std err the number of paths reduced.<a name="line.1214"></a> |
| <FONT color="green">1215</FONT> */<a name="line.1215"></a> |
| <FONT color="green">1216</FONT> protected void diagnoseNumPaths(Vector paths, int numPathsEliminated, <a name="line.1216"></a> |
| <FONT color="green">1217</FONT> int numUniquePathsEliminated) <a name="line.1217"></a> |
| <FONT color="green">1218</FONT> {<a name="line.1218"></a> |
| <FONT color="green">1219</FONT> if (numPathsEliminated > 0)<a name="line.1219"></a> |
| <FONT color="green">1220</FONT> { <a name="line.1220"></a> |
| <FONT color="green">1221</FONT> if(paths == m_paths)<a name="line.1221"></a> |
| <FONT color="green">1222</FONT> {<a name="line.1222"></a> |
| <FONT color="green">1223</FONT> System.err.println("Eliminated " + numPathsEliminated + " total paths!");<a name="line.1223"></a> |
| <FONT color="green">1224</FONT> System.err.println(<a name="line.1224"></a> |
| <FONT color="green">1225</FONT> "Consolodated " + numUniquePathsEliminated + " redundent paths!");<a name="line.1225"></a> |
| <FONT color="green">1226</FONT> }<a name="line.1226"></a> |
| <FONT color="green">1227</FONT> else<a name="line.1227"></a> |
| <FONT color="green">1228</FONT> {<a name="line.1228"></a> |
| <FONT color="green">1229</FONT> System.err.println("Eliminated " + numPathsEliminated + " total global paths!");<a name="line.1229"></a> |
| <FONT color="green">1230</FONT> System.err.println(<a name="line.1230"></a> |
| <FONT color="green">1231</FONT> "Consolodated " + numUniquePathsEliminated + " redundent global paths!");<a name="line.1231"></a> |
| <FONT color="green">1232</FONT> }<a name="line.1232"></a> |
| <FONT color="green">1233</FONT> } <a name="line.1233"></a> |
| <FONT color="green">1234</FONT> }<a name="line.1234"></a> |
| <FONT color="green">1235</FONT> <a name="line.1235"></a> |
| <FONT color="green">1236</FONT> <a name="line.1236"></a> |
| <FONT color="green">1237</FONT> /**<a name="line.1237"></a> |
| <FONT color="green">1238</FONT> * Assert that the expression is a LocPathIterator, and, if <a name="line.1238"></a> |
| <FONT color="green">1239</FONT> * not, try to give some diagnostic info.<a name="line.1239"></a> |
| <FONT color="green">1240</FONT> */<a name="line.1240"></a> |
| <FONT color="green">1241</FONT> private final void assertIsLocPathIterator(Expression expr1, ExpressionOwner eo) <a name="line.1241"></a> |
| <FONT color="green">1242</FONT> throws RuntimeException <a name="line.1242"></a> |
| <FONT color="green">1243</FONT> {<a name="line.1243"></a> |
| <FONT color="green">1244</FONT> if(!(expr1 instanceof LocPathIterator))<a name="line.1244"></a> |
| <FONT color="green">1245</FONT> {<a name="line.1245"></a> |
| <FONT color="green">1246</FONT> String errMsg;<a name="line.1246"></a> |
| <FONT color="green">1247</FONT> if(expr1 instanceof Variable)<a name="line.1247"></a> |
| <FONT color="green">1248</FONT> {<a name="line.1248"></a> |
| <FONT color="green">1249</FONT> errMsg = "Programmer's assertion: expr1 not an iterator: "+<a name="line.1249"></a> |
| <FONT color="green">1250</FONT> ((Variable)expr1).getQName();<a name="line.1250"></a> |
| <FONT color="green">1251</FONT> }<a name="line.1251"></a> |
| <FONT color="green">1252</FONT> else<a name="line.1252"></a> |
| <FONT color="green">1253</FONT> {<a name="line.1253"></a> |
| <FONT color="green">1254</FONT> errMsg = "Programmer's assertion: expr1 not an iterator: "+<a name="line.1254"></a> |
| <FONT color="green">1255</FONT> expr1.getClass().getName();<a name="line.1255"></a> |
| <FONT color="green">1256</FONT> }<a name="line.1256"></a> |
| <FONT color="green">1257</FONT> throw new RuntimeException(errMsg + ", "+<a name="line.1257"></a> |
| <FONT color="green">1258</FONT> eo.getClass().getName()+" "+<a name="line.1258"></a> |
| <FONT color="green">1259</FONT> expr1.exprGetParent());<a name="line.1259"></a> |
| <FONT color="green">1260</FONT> }<a name="line.1260"></a> |
| <FONT color="green">1261</FONT> }<a name="line.1261"></a> |
| <FONT color="green">1262</FONT> <a name="line.1262"></a> |
| <FONT color="green">1263</FONT> <a name="line.1263"></a> |
| <FONT color="green">1264</FONT> /**<a name="line.1264"></a> |
| <FONT color="green">1265</FONT> * Validate some assumptions about the new LocPathIterator and it's <a name="line.1265"></a> |
| <FONT color="green">1266</FONT> * owner and the state of the list.<a name="line.1266"></a> |
| <FONT color="green">1267</FONT> */<a name="line.1267"></a> |
| <FONT color="green">1268</FONT> private static void validateNewAddition(Vector paths, ExpressionOwner owner, <a name="line.1268"></a> |
| <FONT color="green">1269</FONT> LocPathIterator path) <a name="line.1269"></a> |
| <FONT color="green">1270</FONT> throws RuntimeException <a name="line.1270"></a> |
| <FONT color="green">1271</FONT> {<a name="line.1271"></a> |
| <FONT color="green">1272</FONT> assertion(owner.getExpression() == path, "owner.getExpression() != path!!!");<a name="line.1272"></a> |
| <FONT color="green">1273</FONT> int n = paths.size();<a name="line.1273"></a> |
| <FONT color="green">1274</FONT> // There should never be any duplicates in the list!<a name="line.1274"></a> |
| <FONT color="green">1275</FONT> for(int i = 0; i < n; i++)<a name="line.1275"></a> |
| <FONT color="green">1276</FONT> {<a name="line.1276"></a> |
| <FONT color="green">1277</FONT> ExpressionOwner ew = (ExpressionOwner)paths.elementAt(i);<a name="line.1277"></a> |
| <FONT color="green">1278</FONT> assertion(ew != owner, "duplicate owner on the list!!!");<a name="line.1278"></a> |
| <FONT color="green">1279</FONT> assertion(ew.getExpression() != path, "duplicate expression on the list!!!");<a name="line.1279"></a> |
| <FONT color="green">1280</FONT> }<a name="line.1280"></a> |
| <FONT color="green">1281</FONT> }<a name="line.1281"></a> |
| <FONT color="green">1282</FONT> <a name="line.1282"></a> |
| <FONT color="green">1283</FONT> /**<a name="line.1283"></a> |
| <FONT color="green">1284</FONT> * Simple assertion.<a name="line.1284"></a> |
| <FONT color="green">1285</FONT> */<a name="line.1285"></a> |
| <FONT color="green">1286</FONT> protected static void assertion(boolean b, String msg)<a name="line.1286"></a> |
| <FONT color="green">1287</FONT> {<a name="line.1287"></a> |
| <FONT color="green">1288</FONT> if(!b)<a name="line.1288"></a> |
| <FONT color="green">1289</FONT> {<a name="line.1289"></a> |
| <FONT color="green">1290</FONT> throw new RuntimeException(XSLMessages.createMessage(XSLTErrorResources.ER_ASSERT_REDUNDENT_EXPR_ELIMINATOR, new Object[]{msg}));<a name="line.1290"></a> |
| <FONT color="green">1291</FONT> // "Programmer's assertion in RundundentExprEliminator: "+msg);<a name="line.1291"></a> |
| <FONT color="green">1292</FONT> }<a name="line.1292"></a> |
| <FONT color="green">1293</FONT> }<a name="line.1293"></a> |
| <FONT color="green">1294</FONT> <a name="line.1294"></a> |
| <FONT color="green">1295</FONT> /**<a name="line.1295"></a> |
| <FONT color="green">1296</FONT> * Since we want to sort multistep expressions by length, use <a name="line.1296"></a> |
| <FONT color="green">1297</FONT> * a linked list with elements of type MultistepExprHolder.<a name="line.1297"></a> |
| <FONT color="green">1298</FONT> */<a name="line.1298"></a> |
| <FONT color="green">1299</FONT> class MultistepExprHolder implements Cloneable<a name="line.1299"></a> |
| <FONT color="green">1300</FONT> {<a name="line.1300"></a> |
| <FONT color="green">1301</FONT> ExpressionOwner m_exprOwner; // Will change to null once we have processed this item.<a name="line.1301"></a> |
| <FONT color="green">1302</FONT> final int m_stepCount;<a name="line.1302"></a> |
| <FONT color="green">1303</FONT> MultistepExprHolder m_next;<a name="line.1303"></a> |
| <FONT color="green">1304</FONT> <a name="line.1304"></a> |
| <FONT color="green">1305</FONT> /**<a name="line.1305"></a> |
| <FONT color="green">1306</FONT> * Clone this object.<a name="line.1306"></a> |
| <FONT color="green">1307</FONT> */<a name="line.1307"></a> |
| <FONT color="green">1308</FONT> public Object clone()<a name="line.1308"></a> |
| <FONT color="green">1309</FONT> throws CloneNotSupportedException<a name="line.1309"></a> |
| <FONT color="green">1310</FONT> {<a name="line.1310"></a> |
| <FONT color="green">1311</FONT> return super.clone();<a name="line.1311"></a> |
| <FONT color="green">1312</FONT> }<a name="line.1312"></a> |
| <FONT color="green">1313</FONT> <a name="line.1313"></a> |
| <FONT color="green">1314</FONT> /**<a name="line.1314"></a> |
| <FONT color="green">1315</FONT> * Create a MultistepExprHolder.<a name="line.1315"></a> |
| <FONT color="green">1316</FONT> * <a name="line.1316"></a> |
| <FONT color="green">1317</FONT> * @param exprOwner the owner of the expression we are holding.<a name="line.1317"></a> |
| <FONT color="green">1318</FONT> * It must hold a LocationPathIterator.<a name="line.1318"></a> |
| <FONT color="green">1319</FONT> * @param stepCount The number of steps in the location path.<a name="line.1319"></a> |
| <FONT color="green">1320</FONT> */<a name="line.1320"></a> |
| <FONT color="green">1321</FONT> MultistepExprHolder(ExpressionOwner exprOwner, int stepCount, MultistepExprHolder next)<a name="line.1321"></a> |
| <FONT color="green">1322</FONT> {<a name="line.1322"></a> |
| <FONT color="green">1323</FONT> m_exprOwner = exprOwner;<a name="line.1323"></a> |
| <FONT color="green">1324</FONT> assertion(null != m_exprOwner, "exprOwner can not be null!");<a name="line.1324"></a> |
| <FONT color="green">1325</FONT> m_stepCount = stepCount;<a name="line.1325"></a> |
| <FONT color="green">1326</FONT> m_next = next;<a name="line.1326"></a> |
| <FONT color="green">1327</FONT> }<a name="line.1327"></a> |
| <FONT color="green">1328</FONT> <a name="line.1328"></a> |
| <FONT color="green">1329</FONT> /**<a name="line.1329"></a> |
| <FONT color="green">1330</FONT> * Add a new MultistepExprHolder in sorted order in the list.<a name="line.1330"></a> |
| <FONT color="green">1331</FONT> * <a name="line.1331"></a> |
| <FONT color="green">1332</FONT> * @param exprOwner the owner of the expression we are holding.<a name="line.1332"></a> |
| <FONT color="green">1333</FONT> * It must hold a LocationPathIterator.<a name="line.1333"></a> |
| <FONT color="green">1334</FONT> * @param stepCount The number of steps in the location path.<a name="line.1334"></a> |
| <FONT color="green">1335</FONT> * @return The new head of the linked list.<a name="line.1335"></a> |
| <FONT color="green">1336</FONT> */<a name="line.1336"></a> |
| <FONT color="green">1337</FONT> MultistepExprHolder addInSortedOrder(ExpressionOwner exprOwner, int stepCount)<a name="line.1337"></a> |
| <FONT color="green">1338</FONT> {<a name="line.1338"></a> |
| <FONT color="green">1339</FONT> MultistepExprHolder first = this;<a name="line.1339"></a> |
| <FONT color="green">1340</FONT> MultistepExprHolder next = this;<a name="line.1340"></a> |
| <FONT color="green">1341</FONT> MultistepExprHolder prev = null;<a name="line.1341"></a> |
| <FONT color="green">1342</FONT> while(null != next)<a name="line.1342"></a> |
| <FONT color="green">1343</FONT> {<a name="line.1343"></a> |
| <FONT color="green">1344</FONT> if(stepCount >= next.m_stepCount)<a name="line.1344"></a> |
| <FONT color="green">1345</FONT> {<a name="line.1345"></a> |
| <FONT color="green">1346</FONT> MultistepExprHolder newholder = new MultistepExprHolder(exprOwner, stepCount, next);<a name="line.1346"></a> |
| <FONT color="green">1347</FONT> if(null == prev)<a name="line.1347"></a> |
| <FONT color="green">1348</FONT> first = newholder;<a name="line.1348"></a> |
| <FONT color="green">1349</FONT> else<a name="line.1349"></a> |
| <FONT color="green">1350</FONT> prev.m_next = newholder;<a name="line.1350"></a> |
| <FONT color="green">1351</FONT> <a name="line.1351"></a> |
| <FONT color="green">1352</FONT> return first;<a name="line.1352"></a> |
| <FONT color="green">1353</FONT> }<a name="line.1353"></a> |
| <FONT color="green">1354</FONT> prev = next;<a name="line.1354"></a> |
| <FONT color="green">1355</FONT> next = next.m_next;<a name="line.1355"></a> |
| <FONT color="green">1356</FONT> }<a name="line.1356"></a> |
| <FONT color="green">1357</FONT> <a name="line.1357"></a> |
| <FONT color="green">1358</FONT> prev.m_next = new MultistepExprHolder(exprOwner, stepCount, null);<a name="line.1358"></a> |
| <FONT color="green">1359</FONT> return first;<a name="line.1359"></a> |
| <FONT color="green">1360</FONT> }<a name="line.1360"></a> |
| <FONT color="green">1361</FONT> <a name="line.1361"></a> |
| <FONT color="green">1362</FONT> /**<a name="line.1362"></a> |
| <FONT color="green">1363</FONT> * Remove the given element from the list. 'this' should <a name="line.1363"></a> |
| <FONT color="green">1364</FONT> * be the head of the list. If the item to be removed is not <a name="line.1364"></a> |
| <FONT color="green">1365</FONT> * found, an assertion will be made.<a name="line.1365"></a> |
| <FONT color="green">1366</FONT> * <a name="line.1366"></a> |
| <FONT color="green">1367</FONT> * @param itemToRemove The item to remove from the list.<a name="line.1367"></a> |
| <FONT color="green">1368</FONT> * @return The head of the list, which may have changed if itemToRemove <a name="line.1368"></a> |
| <FONT color="green">1369</FONT> * is the same as this element. Null if the item to remove is the <a name="line.1369"></a> |
| <FONT color="green">1370</FONT> * only item in the list.<a name="line.1370"></a> |
| <FONT color="green">1371</FONT> */<a name="line.1371"></a> |
| <FONT color="green">1372</FONT> MultistepExprHolder unlink(MultistepExprHolder itemToRemove)<a name="line.1372"></a> |
| <FONT color="green">1373</FONT> {<a name="line.1373"></a> |
| <FONT color="green">1374</FONT> MultistepExprHolder first = this;<a name="line.1374"></a> |
| <FONT color="green">1375</FONT> MultistepExprHolder next = this;<a name="line.1375"></a> |
| <FONT color="green">1376</FONT> MultistepExprHolder prev = null;<a name="line.1376"></a> |
| <FONT color="green">1377</FONT> while(null != next)<a name="line.1377"></a> |
| <FONT color="green">1378</FONT> {<a name="line.1378"></a> |
| <FONT color="green">1379</FONT> if(next == itemToRemove)<a name="line.1379"></a> |
| <FONT color="green">1380</FONT> {<a name="line.1380"></a> |
| <FONT color="green">1381</FONT> if(null == prev)<a name="line.1381"></a> |
| <FONT color="green">1382</FONT> first = next.m_next;<a name="line.1382"></a> |
| <FONT color="green">1383</FONT> else<a name="line.1383"></a> |
| <FONT color="green">1384</FONT> prev.m_next = next.m_next;<a name="line.1384"></a> |
| <FONT color="green">1385</FONT> <a name="line.1385"></a> |
| <FONT color="green">1386</FONT> next.m_next = null;<a name="line.1386"></a> |
| <FONT color="green">1387</FONT> <a name="line.1387"></a> |
| <FONT color="green">1388</FONT> return first;<a name="line.1388"></a> |
| <FONT color="green">1389</FONT> }<a name="line.1389"></a> |
| <FONT color="green">1390</FONT> prev = next;<a name="line.1390"></a> |
| <FONT color="green">1391</FONT> next = next.m_next;<a name="line.1391"></a> |
| <FONT color="green">1392</FONT> }<a name="line.1392"></a> |
| <FONT color="green">1393</FONT> <a name="line.1393"></a> |
| <FONT color="green">1394</FONT> assertion(false, "unlink failed!!!");<a name="line.1394"></a> |
| <FONT color="green">1395</FONT> return null;<a name="line.1395"></a> |
| <FONT color="green">1396</FONT> }<a name="line.1396"></a> |
| <FONT color="green">1397</FONT> <a name="line.1397"></a> |
| <FONT color="green">1398</FONT> /**<a name="line.1398"></a> |
| <FONT color="green">1399</FONT> * Get the number of linked list items.<a name="line.1399"></a> |
| <FONT color="green">1400</FONT> */<a name="line.1400"></a> |
| <FONT color="green">1401</FONT> int getLength()<a name="line.1401"></a> |
| <FONT color="green">1402</FONT> {<a name="line.1402"></a> |
| <FONT color="green">1403</FONT> int count = 0;<a name="line.1403"></a> |
| <FONT color="green">1404</FONT> MultistepExprHolder next = this;<a name="line.1404"></a> |
| <FONT color="green">1405</FONT> while(null != next)<a name="line.1405"></a> |
| <FONT color="green">1406</FONT> {<a name="line.1406"></a> |
| <FONT color="green">1407</FONT> count++;<a name="line.1407"></a> |
| <FONT color="green">1408</FONT> next = next.m_next;<a name="line.1408"></a> |
| <FONT color="green">1409</FONT> }<a name="line.1409"></a> |
| <FONT color="green">1410</FONT> return count;<a name="line.1410"></a> |
| <FONT color="green">1411</FONT> }<a name="line.1411"></a> |
| <FONT color="green">1412</FONT> <a name="line.1412"></a> |
| <FONT color="green">1413</FONT> /**<a name="line.1413"></a> |
| <FONT color="green">1414</FONT> * Print diagnostics out for the multistep list.<a name="line.1414"></a> |
| <FONT color="green">1415</FONT> */<a name="line.1415"></a> |
| <FONT color="green">1416</FONT> protected void diagnose()<a name="line.1416"></a> |
| <FONT color="green">1417</FONT> {<a name="line.1417"></a> |
| <FONT color="green">1418</FONT> System.err.print("Found multistep iterators: " + this.getLength() + " ");<a name="line.1418"></a> |
| <FONT color="green">1419</FONT> MultistepExprHolder next = this;<a name="line.1419"></a> |
| <FONT color="green">1420</FONT> while (null != next)<a name="line.1420"></a> |
| <FONT color="green">1421</FONT> {<a name="line.1421"></a> |
| <FONT color="green">1422</FONT> System.err.print("" + next.m_stepCount);<a name="line.1422"></a> |
| <FONT color="green">1423</FONT> next = next.m_next;<a name="line.1423"></a> |
| <FONT color="green">1424</FONT> if (null != next)<a name="line.1424"></a> |
| <FONT color="green">1425</FONT> System.err.print(", ");<a name="line.1425"></a> |
| <FONT color="green">1426</FONT> }<a name="line.1426"></a> |
| <FONT color="green">1427</FONT> System.err.println();<a name="line.1427"></a> |
| <FONT color="green">1428</FONT> }<a name="line.1428"></a> |
| <FONT color="green">1429</FONT> <a name="line.1429"></a> |
| <FONT color="green">1430</FONT> }<a name="line.1430"></a> |
| <FONT color="green">1431</FONT> <a name="line.1431"></a> |
| <FONT color="green">1432</FONT> }<a name="line.1432"></a> |
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| </PRE> |
| </BODY> |
| </HTML> |
