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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: WalkingIterator.java 469314 2006-10-30 23:31:59Z minchau $<a name="line.19"></a> |
| <FONT color="green">020</FONT> */<a name="line.20"></a> |
| <FONT color="green">021</FONT> package org.apache.xpath.axes;<a name="line.21"></a> |
| <FONT color="green">022</FONT> <a name="line.22"></a> |
| <FONT color="green">023</FONT> import org.apache.xml.dtm.DTM;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import org.apache.xml.utils.PrefixResolver;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.xpath.Expression;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import org.apache.xpath.ExpressionOwner;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xpath.VariableStack;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xpath.XPathVisitor;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.xpath.compiler.Compiler;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xpath.compiler.OpMap;<a name="line.30"></a> |
| <FONT color="green">031</FONT> <a name="line.31"></a> |
| <FONT color="green">032</FONT> /**<a name="line.32"></a> |
| <FONT color="green">033</FONT> * Location path iterator that uses Walkers.<a name="line.33"></a> |
| <FONT color="green">034</FONT> */<a name="line.34"></a> |
| <FONT color="green">035</FONT> <a name="line.35"></a> |
| <FONT color="green">036</FONT> public class WalkingIterator extends LocPathIterator implements ExpressionOwner<a name="line.36"></a> |
| <FONT color="green">037</FONT> {<a name="line.37"></a> |
| <FONT color="green">038</FONT> static final long serialVersionUID = 9110225941815665906L;<a name="line.38"></a> |
| <FONT color="green">039</FONT> /**<a name="line.39"></a> |
| <FONT color="green">040</FONT> * Create a WalkingIterator iterator, including creation<a name="line.40"></a> |
| <FONT color="green">041</FONT> * of step walkers from the opcode list, and call back<a name="line.41"></a> |
| <FONT color="green">042</FONT> * into the Compiler to create predicate expressions.<a name="line.42"></a> |
| <FONT color="green">043</FONT> *<a name="line.43"></a> |
| <FONT color="green">044</FONT> * @param compiler The Compiler which is creating<a name="line.44"></a> |
| <FONT color="green">045</FONT> * this expression.<a name="line.45"></a> |
| <FONT color="green">046</FONT> * @param opPos The position of this iterator in the<a name="line.46"></a> |
| <FONT color="green">047</FONT> * opcode list from the compiler.<a name="line.47"></a> |
| <FONT color="green">048</FONT> * @param shouldLoadWalkers True if walkers should be<a name="line.48"></a> |
| <FONT color="green">049</FONT> * loaded, or false if this is a derived iterator and<a name="line.49"></a> |
| <FONT color="green">050</FONT> * it doesn't wish to load child walkers.<a name="line.50"></a> |
| <FONT color="green">051</FONT> *<a name="line.51"></a> |
| <FONT color="green">052</FONT> * @throws javax.xml.transform.TransformerException<a name="line.52"></a> |
| <FONT color="green">053</FONT> */<a name="line.53"></a> |
| <FONT color="green">054</FONT> WalkingIterator(<a name="line.54"></a> |
| <FONT color="green">055</FONT> Compiler compiler, int opPos, int analysis, boolean shouldLoadWalkers)<a name="line.55"></a> |
| <FONT color="green">056</FONT> throws javax.xml.transform.TransformerException<a name="line.56"></a> |
| <FONT color="green">057</FONT> {<a name="line.57"></a> |
| <FONT color="green">058</FONT> super(compiler, opPos, analysis, shouldLoadWalkers);<a name="line.58"></a> |
| <FONT color="green">059</FONT> <a name="line.59"></a> |
| <FONT color="green">060</FONT> int firstStepPos = OpMap.getFirstChildPos(opPos);<a name="line.60"></a> |
| <FONT color="green">061</FONT> <a name="line.61"></a> |
| <FONT color="green">062</FONT> if (shouldLoadWalkers)<a name="line.62"></a> |
| <FONT color="green">063</FONT> {<a name="line.63"></a> |
| <FONT color="green">064</FONT> m_firstWalker = WalkerFactory.loadWalkers(this, compiler, firstStepPos, 0);<a name="line.64"></a> |
| <FONT color="green">065</FONT> m_lastUsedWalker = m_firstWalker;<a name="line.65"></a> |
| <FONT color="green">066</FONT> }<a name="line.66"></a> |
| <FONT color="green">067</FONT> }<a name="line.67"></a> |
| <FONT color="green">068</FONT> <a name="line.68"></a> |
| <FONT color="green">069</FONT> /**<a name="line.69"></a> |
| <FONT color="green">070</FONT> * Create a WalkingIterator object.<a name="line.70"></a> |
| <FONT color="green">071</FONT> *<a name="line.71"></a> |
| <FONT color="green">072</FONT> * @param nscontext The namespace context for this iterator,<a name="line.72"></a> |
| <FONT color="green">073</FONT> * should be OK if null.<a name="line.73"></a> |
| <FONT color="green">074</FONT> */<a name="line.74"></a> |
| <FONT color="green">075</FONT> public WalkingIterator(PrefixResolver nscontext)<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> super(nscontext);<a name="line.78"></a> |
| <FONT color="green">079</FONT> }<a name="line.79"></a> |
| <FONT color="green">080</FONT> <a name="line.80"></a> |
| <FONT color="green">081</FONT> <a name="line.81"></a> |
| <FONT color="green">082</FONT> /** <a name="line.82"></a> |
| <FONT color="green">083</FONT> * Get the analysis bits for this walker, as defined in the WalkerFactory.<a name="line.83"></a> |
| <FONT color="green">084</FONT> * @return One of WalkerFactory#BIT_DESCENDANT, etc.<a name="line.84"></a> |
| <FONT color="green">085</FONT> */<a name="line.85"></a> |
| <FONT color="green">086</FONT> public int getAnalysisBits()<a name="line.86"></a> |
| <FONT color="green">087</FONT> {<a name="line.87"></a> |
| <FONT color="green">088</FONT> int bits = 0;<a name="line.88"></a> |
| <FONT color="green">089</FONT> if (null != m_firstWalker)<a name="line.89"></a> |
| <FONT color="green">090</FONT> { <a name="line.90"></a> |
| <FONT color="green">091</FONT> AxesWalker walker = m_firstWalker;<a name="line.91"></a> |
| <FONT color="green">092</FONT> <a name="line.92"></a> |
| <FONT color="green">093</FONT> while (null != walker)<a name="line.93"></a> |
| <FONT color="green">094</FONT> {<a name="line.94"></a> |
| <FONT color="green">095</FONT> int bit = walker.getAnalysisBits();<a name="line.95"></a> |
| <FONT color="green">096</FONT> bits |= bit;<a name="line.96"></a> |
| <FONT color="green">097</FONT> walker = walker.getNextWalker();<a name="line.97"></a> |
| <FONT color="green">098</FONT> } <a name="line.98"></a> |
| <FONT color="green">099</FONT> }<a name="line.99"></a> |
| <FONT color="green">100</FONT> return bits;<a name="line.100"></a> |
| <FONT color="green">101</FONT> }<a name="line.101"></a> |
| <FONT color="green">102</FONT> <a name="line.102"></a> |
| <FONT color="green">103</FONT> /**<a name="line.103"></a> |
| <FONT color="green">104</FONT> * Get a cloned WalkingIterator that holds the same<a name="line.104"></a> |
| <FONT color="green">105</FONT> * position as this iterator.<a name="line.105"></a> |
| <FONT color="green">106</FONT> *<a name="line.106"></a> |
| <FONT color="green">107</FONT> * @return A clone of this iterator that holds the same node position.<a name="line.107"></a> |
| <FONT color="green">108</FONT> *<a name="line.108"></a> |
| <FONT color="green">109</FONT> * @throws CloneNotSupportedException<a name="line.109"></a> |
| <FONT color="green">110</FONT> */<a name="line.110"></a> |
| <FONT color="green">111</FONT> public Object clone() throws CloneNotSupportedException<a name="line.111"></a> |
| <FONT color="green">112</FONT> {<a name="line.112"></a> |
| <FONT color="green">113</FONT> <a name="line.113"></a> |
| <FONT color="green">114</FONT> WalkingIterator clone = (WalkingIterator) super.clone();<a name="line.114"></a> |
| <FONT color="green">115</FONT> <a name="line.115"></a> |
| <FONT color="green">116</FONT> // clone.m_varStackPos = this.m_varStackPos;<a name="line.116"></a> |
| <FONT color="green">117</FONT> // clone.m_varStackContext = this.m_varStackContext;<a name="line.117"></a> |
| <FONT color="green">118</FONT> if (null != m_firstWalker)<a name="line.118"></a> |
| <FONT color="green">119</FONT> {<a name="line.119"></a> |
| <FONT color="green">120</FONT> clone.m_firstWalker = m_firstWalker.cloneDeep(clone, null);<a name="line.120"></a> |
| <FONT color="green">121</FONT> }<a name="line.121"></a> |
| <FONT color="green">122</FONT> <a name="line.122"></a> |
| <FONT color="green">123</FONT> return clone;<a name="line.123"></a> |
| <FONT color="green">124</FONT> }<a name="line.124"></a> |
| <FONT color="green">125</FONT> <a name="line.125"></a> |
| <FONT color="green">126</FONT> /**<a name="line.126"></a> |
| <FONT color="green">127</FONT> * Reset the iterator.<a name="line.127"></a> |
| <FONT color="green">128</FONT> */<a name="line.128"></a> |
| <FONT color="green">129</FONT> public void reset()<a name="line.129"></a> |
| <FONT color="green">130</FONT> {<a name="line.130"></a> |
| <FONT color="green">131</FONT> <a name="line.131"></a> |
| <FONT color="green">132</FONT> super.reset();<a name="line.132"></a> |
| <FONT color="green">133</FONT> <a name="line.133"></a> |
| <FONT color="green">134</FONT> if (null != m_firstWalker)<a name="line.134"></a> |
| <FONT color="green">135</FONT> {<a name="line.135"></a> |
| <FONT color="green">136</FONT> m_lastUsedWalker = m_firstWalker;<a name="line.136"></a> |
| <FONT color="green">137</FONT> <a name="line.137"></a> |
| <FONT color="green">138</FONT> m_firstWalker.setRoot(m_context);<a name="line.138"></a> |
| <FONT color="green">139</FONT> }<a name="line.139"></a> |
| <FONT color="green">140</FONT> <a name="line.140"></a> |
| <FONT color="green">141</FONT> }<a name="line.141"></a> |
| <FONT color="green">142</FONT> <a name="line.142"></a> |
| <FONT color="green">143</FONT> /**<a name="line.143"></a> |
| <FONT color="green">144</FONT> * Initialize the context values for this expression<a name="line.144"></a> |
| <FONT color="green">145</FONT> * after it is cloned.<a name="line.145"></a> |
| <FONT color="green">146</FONT> *<a name="line.146"></a> |
| <FONT color="green">147</FONT> * @param context The XPath runtime context for this<a name="line.147"></a> |
| <FONT color="green">148</FONT> * transformation.<a name="line.148"></a> |
| <FONT color="green">149</FONT> */<a name="line.149"></a> |
| <FONT color="green">150</FONT> public void setRoot(int context, Object environment)<a name="line.150"></a> |
| <FONT color="green">151</FONT> {<a name="line.151"></a> |
| <FONT color="green">152</FONT> <a name="line.152"></a> |
| <FONT color="green">153</FONT> super.setRoot(context, environment);<a name="line.153"></a> |
| <FONT color="green">154</FONT> <a name="line.154"></a> |
| <FONT color="green">155</FONT> if(null != m_firstWalker)<a name="line.155"></a> |
| <FONT color="green">156</FONT> {<a name="line.156"></a> |
| <FONT color="green">157</FONT> m_firstWalker.setRoot(context);<a name="line.157"></a> |
| <FONT color="green">158</FONT> m_lastUsedWalker = m_firstWalker;<a name="line.158"></a> |
| <FONT color="green">159</FONT> }<a name="line.159"></a> |
| <FONT color="green">160</FONT> }<a name="line.160"></a> |
| <FONT color="green">161</FONT> <a name="line.161"></a> |
| <FONT color="green">162</FONT> /**<a name="line.162"></a> |
| <FONT color="green">163</FONT> * Returns the next node in the set and advances the position of the<a name="line.163"></a> |
| <FONT color="green">164</FONT> * iterator in the set. After a NodeIterator is created, the first call<a name="line.164"></a> |
| <FONT color="green">165</FONT> * to nextNode() returns the first node in the set.<a name="line.165"></a> |
| <FONT color="green">166</FONT> * @return The next <code>Node</code> in the set being iterated over, or<a name="line.166"></a> |
| <FONT color="green">167</FONT> * <code>null</code> if there are no more members in that set.<a name="line.167"></a> |
| <FONT color="green">168</FONT> */<a name="line.168"></a> |
| <FONT color="green">169</FONT> public int nextNode()<a name="line.169"></a> |
| <FONT color="green">170</FONT> {<a name="line.170"></a> |
| <FONT color="green">171</FONT> if(m_foundLast)<a name="line.171"></a> |
| <FONT color="green">172</FONT> return DTM.NULL;<a name="line.172"></a> |
| <FONT color="green">173</FONT> <a name="line.173"></a> |
| <FONT color="green">174</FONT> // If the variable stack position is not -1, we'll have to <a name="line.174"></a> |
| <FONT color="green">175</FONT> // set our position in the variable stack, so our variable access <a name="line.175"></a> |
| <FONT color="green">176</FONT> // will be correct. Iterators that are at the top level of the <a name="line.176"></a> |
| <FONT color="green">177</FONT> // expression need to reset the variable stack, while iterators <a name="line.177"></a> |
| <FONT color="green">178</FONT> // in predicates do not need to, and should not, since their execution<a name="line.178"></a> |
| <FONT color="green">179</FONT> // may be much later than top-level iterators. <a name="line.179"></a> |
| <FONT color="green">180</FONT> // m_varStackPos is set in setRoot, which is called <a name="line.180"></a> |
| <FONT color="green">181</FONT> // from the execute method.<a name="line.181"></a> |
| <FONT color="green">182</FONT> if (-1 == m_stackFrame)<a name="line.182"></a> |
| <FONT color="green">183</FONT> {<a name="line.183"></a> |
| <FONT color="green">184</FONT> return returnNextNode(m_firstWalker.nextNode());<a name="line.184"></a> |
| <FONT color="green">185</FONT> }<a name="line.185"></a> |
| <FONT color="green">186</FONT> else<a name="line.186"></a> |
| <FONT color="green">187</FONT> {<a name="line.187"></a> |
| <FONT color="green">188</FONT> VariableStack vars = m_execContext.getVarStack();<a name="line.188"></a> |
| <FONT color="green">189</FONT> <a name="line.189"></a> |
| <FONT color="green">190</FONT> // These three statements need to be combined into one operation.<a name="line.190"></a> |
| <FONT color="green">191</FONT> int savedStart = vars.getStackFrame();<a name="line.191"></a> |
| <FONT color="green">192</FONT> <a name="line.192"></a> |
| <FONT color="green">193</FONT> vars.setStackFrame(m_stackFrame);<a name="line.193"></a> |
| <FONT color="green">194</FONT> <a name="line.194"></a> |
| <FONT color="green">195</FONT> int n = returnNextNode(m_firstWalker.nextNode());<a name="line.195"></a> |
| <FONT color="green">196</FONT> <a name="line.196"></a> |
| <FONT color="green">197</FONT> // These two statements need to be combined into one operation.<a name="line.197"></a> |
| <FONT color="green">198</FONT> vars.setStackFrame(savedStart);<a name="line.198"></a> |
| <FONT color="green">199</FONT> <a name="line.199"></a> |
| <FONT color="green">200</FONT> return n;<a name="line.200"></a> |
| <FONT color="green">201</FONT> }<a name="line.201"></a> |
| <FONT color="green">202</FONT> }<a name="line.202"></a> |
| <FONT color="green">203</FONT> <a name="line.203"></a> |
| <FONT color="green">204</FONT> <a name="line.204"></a> |
| <FONT color="green">205</FONT> /**<a name="line.205"></a> |
| <FONT color="green">206</FONT> * Get the head of the walker list.<a name="line.206"></a> |
| <FONT color="green">207</FONT> *<a name="line.207"></a> |
| <FONT color="green">208</FONT> * @return The head of the walker list, or null<a name="line.208"></a> |
| <FONT color="green">209</FONT> * if this iterator does not implement walkers.<a name="line.209"></a> |
| <FONT color="green">210</FONT> * @xsl.usage advanced<a name="line.210"></a> |
| <FONT color="green">211</FONT> */<a name="line.211"></a> |
| <FONT color="green">212</FONT> public final AxesWalker getFirstWalker()<a name="line.212"></a> |
| <FONT color="green">213</FONT> {<a name="line.213"></a> |
| <FONT color="green">214</FONT> return m_firstWalker;<a name="line.214"></a> |
| <FONT color="green">215</FONT> }<a name="line.215"></a> |
| <FONT color="green">216</FONT> <a name="line.216"></a> |
| <FONT color="green">217</FONT> /**<a name="line.217"></a> |
| <FONT color="green">218</FONT> * Set the head of the walker list.<a name="line.218"></a> |
| <FONT color="green">219</FONT> * <a name="line.219"></a> |
| <FONT color="green">220</FONT> * @param walker Should be a valid AxesWalker.<a name="line.220"></a> |
| <FONT color="green">221</FONT> * @xsl.usage advanced<a name="line.221"></a> |
| <FONT color="green">222</FONT> */<a name="line.222"></a> |
| <FONT color="green">223</FONT> public final void setFirstWalker(AxesWalker walker)<a name="line.223"></a> |
| <FONT color="green">224</FONT> {<a name="line.224"></a> |
| <FONT color="green">225</FONT> m_firstWalker = walker;<a name="line.225"></a> |
| <FONT color="green">226</FONT> }<a name="line.226"></a> |
| <FONT color="green">227</FONT> <a name="line.227"></a> |
| <FONT color="green">228</FONT> <a name="line.228"></a> |
| <FONT color="green">229</FONT> /**<a name="line.229"></a> |
| <FONT color="green">230</FONT> * Set the last used walker.<a name="line.230"></a> |
| <FONT color="green">231</FONT> *<a name="line.231"></a> |
| <FONT color="green">232</FONT> * @param walker The last used walker, or null.<a name="line.232"></a> |
| <FONT color="green">233</FONT> * @xsl.usage advanced<a name="line.233"></a> |
| <FONT color="green">234</FONT> */<a name="line.234"></a> |
| <FONT color="green">235</FONT> public final void setLastUsedWalker(AxesWalker walker)<a name="line.235"></a> |
| <FONT color="green">236</FONT> {<a name="line.236"></a> |
| <FONT color="green">237</FONT> m_lastUsedWalker = walker;<a name="line.237"></a> |
| <FONT color="green">238</FONT> }<a name="line.238"></a> |
| <FONT color="green">239</FONT> <a name="line.239"></a> |
| <FONT color="green">240</FONT> /**<a name="line.240"></a> |
| <FONT color="green">241</FONT> * Get the last used walker.<a name="line.241"></a> |
| <FONT color="green">242</FONT> *<a name="line.242"></a> |
| <FONT color="green">243</FONT> * @return The last used walker, or null.<a name="line.243"></a> |
| <FONT color="green">244</FONT> * @xsl.usage advanced<a name="line.244"></a> |
| <FONT color="green">245</FONT> */<a name="line.245"></a> |
| <FONT color="green">246</FONT> public final AxesWalker getLastUsedWalker()<a name="line.246"></a> |
| <FONT color="green">247</FONT> {<a name="line.247"></a> |
| <FONT color="green">248</FONT> return m_lastUsedWalker;<a name="line.248"></a> |
| <FONT color="green">249</FONT> }<a name="line.249"></a> |
| <FONT color="green">250</FONT> <a name="line.250"></a> |
| <FONT color="green">251</FONT> /**<a name="line.251"></a> |
| <FONT color="green">252</FONT> * Detaches the iterator from the set which it iterated over, releasing<a name="line.252"></a> |
| <FONT color="green">253</FONT> * any computational resources and placing the iterator in the INVALID<a name="line.253"></a> |
| <FONT color="green">254</FONT> * state. After<code>detach</code> has been invoked, calls to<a name="line.254"></a> |
| <FONT color="green">255</FONT> * <code>nextNode</code> or<code>previousNode</code> will raise the<a name="line.255"></a> |
| <FONT color="green">256</FONT> * exception INVALID_STATE_ERR.<a name="line.256"></a> |
| <FONT color="green">257</FONT> */<a name="line.257"></a> |
| <FONT color="green">258</FONT> public void detach()<a name="line.258"></a> |
| <FONT color="green">259</FONT> { <a name="line.259"></a> |
| <FONT color="green">260</FONT> if(m_allowDetach)<a name="line.260"></a> |
| <FONT color="green">261</FONT> {<a name="line.261"></a> |
| <FONT color="green">262</FONT> AxesWalker walker = m_firstWalker; <a name="line.262"></a> |
| <FONT color="green">263</FONT> while (null != walker)<a name="line.263"></a> |
| <FONT color="green">264</FONT> {<a name="line.264"></a> |
| <FONT color="green">265</FONT> walker.detach();<a name="line.265"></a> |
| <FONT color="green">266</FONT> walker = walker.getNextWalker();<a name="line.266"></a> |
| <FONT color="green">267</FONT> }<a name="line.267"></a> |
| <FONT color="green">268</FONT> <a name="line.268"></a> |
| <FONT color="green">269</FONT> m_lastUsedWalker = null;<a name="line.269"></a> |
| <FONT color="green">270</FONT> <a name="line.270"></a> |
| <FONT color="green">271</FONT> // Always call the superclass detach last!<a name="line.271"></a> |
| <FONT color="green">272</FONT> super.detach();<a name="line.272"></a> |
| <FONT color="green">273</FONT> }<a name="line.273"></a> |
| <FONT color="green">274</FONT> }<a name="line.274"></a> |
| <FONT color="green">275</FONT> <a name="line.275"></a> |
| <FONT color="green">276</FONT> /**<a name="line.276"></a> |
| <FONT color="green">277</FONT> * This function is used to fixup variables from QNames to stack frame <a name="line.277"></a> |
| <FONT color="green">278</FONT> * indexes at stylesheet build time.<a name="line.278"></a> |
| <FONT color="green">279</FONT> * @param vars List of QNames that correspond to variables. This list <a name="line.279"></a> |
| <FONT color="green">280</FONT> * should be searched backwards for the first qualified name that <a name="line.280"></a> |
| <FONT color="green">281</FONT> * corresponds to the variable reference qname. The position of the <a name="line.281"></a> |
| <FONT color="green">282</FONT> * QName in the vector from the start of the vector will be its position <a name="line.282"></a> |
| <FONT color="green">283</FONT> * in the stack frame (but variables above the globalsTop value will need <a name="line.283"></a> |
| <FONT color="green">284</FONT> * to be offset to the current stack frame).<a name="line.284"></a> |
| <FONT color="green">285</FONT> */<a name="line.285"></a> |
| <FONT color="green">286</FONT> public void fixupVariables(java.util.Vector vars, int globalsSize)<a name="line.286"></a> |
| <FONT color="green">287</FONT> {<a name="line.287"></a> |
| <FONT color="green">288</FONT> m_predicateIndex = -1;<a name="line.288"></a> |
| <FONT color="green">289</FONT> <a name="line.289"></a> |
| <FONT color="green">290</FONT> AxesWalker walker = m_firstWalker;<a name="line.290"></a> |
| <FONT color="green">291</FONT> <a name="line.291"></a> |
| <FONT color="green">292</FONT> while (null != walker)<a name="line.292"></a> |
| <FONT color="green">293</FONT> {<a name="line.293"></a> |
| <FONT color="green">294</FONT> walker.fixupVariables(vars, globalsSize);<a name="line.294"></a> |
| <FONT color="green">295</FONT> walker = walker.getNextWalker();<a name="line.295"></a> |
| <FONT color="green">296</FONT> }<a name="line.296"></a> |
| <FONT color="green">297</FONT> }<a name="line.297"></a> |
| <FONT color="green">298</FONT> <a name="line.298"></a> |
| <FONT color="green">299</FONT> /**<a name="line.299"></a> |
| <FONT color="green">300</FONT> * @see org.apache.xpath.XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)<a name="line.300"></a> |
| <FONT color="green">301</FONT> */<a name="line.301"></a> |
| <FONT color="green">302</FONT> public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)<a name="line.302"></a> |
| <FONT color="green">303</FONT> {<a name="line.303"></a> |
| <FONT color="green">304</FONT> if(visitor.visitLocationPath(owner, this))<a name="line.304"></a> |
| <FONT color="green">305</FONT> {<a name="line.305"></a> |
| <FONT color="green">306</FONT> if(null != m_firstWalker)<a name="line.306"></a> |
| <FONT color="green">307</FONT> {<a name="line.307"></a> |
| <FONT color="green">308</FONT> m_firstWalker.callVisitors(this, visitor);<a name="line.308"></a> |
| <FONT color="green">309</FONT> }<a name="line.309"></a> |
| <FONT color="green">310</FONT> }<a name="line.310"></a> |
| <FONT color="green">311</FONT> }<a name="line.311"></a> |
| <FONT color="green">312</FONT> <a name="line.312"></a> |
| <FONT color="green">313</FONT> <a name="line.313"></a> |
| <FONT color="green">314</FONT> /** The last used step walker in the walker list.<a name="line.314"></a> |
| <FONT color="green">315</FONT> * @serial */<a name="line.315"></a> |
| <FONT color="green">316</FONT> protected AxesWalker m_lastUsedWalker;<a name="line.316"></a> |
| <FONT color="green">317</FONT> <a name="line.317"></a> |
| <FONT color="green">318</FONT> /** The head of the step walker list.<a name="line.318"></a> |
| <FONT color="green">319</FONT> * @serial */<a name="line.319"></a> |
| <FONT color="green">320</FONT> protected AxesWalker m_firstWalker;<a name="line.320"></a> |
| <FONT color="green">321</FONT> <a name="line.321"></a> |
| <FONT color="green">322</FONT> /**<a name="line.322"></a> |
| <FONT color="green">323</FONT> * @see ExpressionOwner#getExpression()<a name="line.323"></a> |
| <FONT color="green">324</FONT> */<a name="line.324"></a> |
| <FONT color="green">325</FONT> public Expression getExpression()<a name="line.325"></a> |
| <FONT color="green">326</FONT> {<a name="line.326"></a> |
| <FONT color="green">327</FONT> return m_firstWalker;<a name="line.327"></a> |
| <FONT color="green">328</FONT> }<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> * @see ExpressionOwner#setExpression(Expression)<a name="line.331"></a> |
| <FONT color="green">332</FONT> */<a name="line.332"></a> |
| <FONT color="green">333</FONT> public void setExpression(Expression exp)<a name="line.333"></a> |
| <FONT color="green">334</FONT> {<a name="line.334"></a> |
| <FONT color="green">335</FONT> exp.exprSetParent(this);<a name="line.335"></a> |
| <FONT color="green">336</FONT> m_firstWalker = (AxesWalker)exp;<a name="line.336"></a> |
| <FONT color="green">337</FONT> }<a name="line.337"></a> |
| <FONT color="green">338</FONT> <a name="line.338"></a> |
| <FONT color="green">339</FONT> /**<a name="line.339"></a> |
| <FONT color="green">340</FONT> * @see Expression#deepEquals(Expression)<a name="line.340"></a> |
| <FONT color="green">341</FONT> */<a name="line.341"></a> |
| <FONT color="green">342</FONT> public boolean deepEquals(Expression expr)<a name="line.342"></a> |
| <FONT color="green">343</FONT> {<a name="line.343"></a> |
| <FONT color="green">344</FONT> if (!super.deepEquals(expr))<a name="line.344"></a> |
| <FONT color="green">345</FONT> return false;<a name="line.345"></a> |
| <FONT color="green">346</FONT> <a name="line.346"></a> |
| <FONT color="green">347</FONT> AxesWalker walker1 = m_firstWalker;<a name="line.347"></a> |
| <FONT color="green">348</FONT> AxesWalker walker2 = ((WalkingIterator)expr).m_firstWalker;<a name="line.348"></a> |
| <FONT color="green">349</FONT> while ((null != walker1) && (null != walker2))<a name="line.349"></a> |
| <FONT color="green">350</FONT> {<a name="line.350"></a> |
| <FONT color="green">351</FONT> if(!walker1.deepEquals(walker2))<a name="line.351"></a> |
| <FONT color="green">352</FONT> return false;<a name="line.352"></a> |
| <FONT color="green">353</FONT> walker1 = walker1.getNextWalker();<a name="line.353"></a> |
| <FONT color="green">354</FONT> walker2 = walker2.getNextWalker();<a name="line.354"></a> |
| <FONT color="green">355</FONT> }<a name="line.355"></a> |
| <FONT color="green">356</FONT> <a name="line.356"></a> |
| <FONT color="green">357</FONT> if((null != walker1) || (null != walker2))<a name="line.357"></a> |
| <FONT color="green">358</FONT> return false;<a name="line.358"></a> |
| <FONT color="green">359</FONT> <a name="line.359"></a> |
| <FONT color="green">360</FONT> return true;<a name="line.360"></a> |
| <FONT color="green">361</FONT> }<a name="line.361"></a> |
| <FONT color="green">362</FONT> <a name="line.362"></a> |
| <FONT color="green">363</FONT> }<a name="line.363"></a> |
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| </PRE> |
| </BODY> |
| </HTML> |
