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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: SyntaxTreeNode.java 1225842 2011-12-30 15:14:35Z mrglavas $<a name="line.19"></a>
<FONT color="green">020</FONT> */<a name="line.20"></a>
<FONT color="green">021</FONT> <a name="line.21"></a>
<FONT color="green">022</FONT> package org.apache.xalan.xsltc.compiler;<a name="line.22"></a>
<FONT color="green">023</FONT> <a name="line.23"></a>
<FONT color="green">024</FONT> import java.util.Enumeration;<a name="line.24"></a>
<FONT color="green">025</FONT> import java.util.Hashtable;<a name="line.25"></a>
<FONT color="green">026</FONT> import java.util.Vector;<a name="line.26"></a>
<FONT color="green">027</FONT> <a name="line.27"></a>
<FONT color="green">028</FONT> import org.apache.bcel.generic.ANEWARRAY;<a name="line.28"></a>
<FONT color="green">029</FONT> import org.apache.bcel.generic.BasicType;<a name="line.29"></a>
<FONT color="green">030</FONT> import org.apache.bcel.generic.CHECKCAST;<a name="line.30"></a>
<FONT color="green">031</FONT> import org.apache.bcel.generic.ConstantPoolGen;<a name="line.31"></a>
<FONT color="green">032</FONT> import org.apache.bcel.generic.DUP_X1;<a name="line.32"></a>
<FONT color="green">033</FONT> import org.apache.bcel.generic.GETFIELD;<a name="line.33"></a>
<FONT color="green">034</FONT> import org.apache.bcel.generic.ICONST;<a name="line.34"></a>
<FONT color="green">035</FONT> import org.apache.bcel.generic.INVOKEINTERFACE;<a name="line.35"></a>
<FONT color="green">036</FONT> import org.apache.bcel.generic.INVOKESPECIAL;<a name="line.36"></a>
<FONT color="green">037</FONT> import org.apache.bcel.generic.INVOKEVIRTUAL;<a name="line.37"></a>
<FONT color="green">038</FONT> import org.apache.bcel.generic.InstructionList;<a name="line.38"></a>
<FONT color="green">039</FONT> import org.apache.bcel.generic.NEW;<a name="line.39"></a>
<FONT color="green">040</FONT> import org.apache.bcel.generic.NEWARRAY;<a name="line.40"></a>
<FONT color="green">041</FONT> import org.apache.bcel.generic.PUSH;<a name="line.41"></a>
<FONT color="green">042</FONT> import org.apache.xalan.xsltc.DOM;<a name="line.42"></a>
<FONT color="green">043</FONT> import org.apache.xalan.xsltc.compiler.util.ClassGenerator;<a name="line.43"></a>
<FONT color="green">044</FONT> import org.apache.xalan.xsltc.compiler.util.ErrorMsg;<a name="line.44"></a>
<FONT color="green">045</FONT> import org.apache.xalan.xsltc.compiler.util.MethodGenerator;<a name="line.45"></a>
<FONT color="green">046</FONT> import org.apache.xalan.xsltc.compiler.util.Type;<a name="line.46"></a>
<FONT color="green">047</FONT> import org.apache.xalan.xsltc.compiler.util.TypeCheckError;<a name="line.47"></a>
<FONT color="green">048</FONT> import org.apache.xalan.xsltc.runtime.AttributeList;<a name="line.48"></a>
<FONT color="green">049</FONT> import org.xml.sax.Attributes;<a name="line.49"></a>
<FONT color="green">050</FONT> <a name="line.50"></a>
<FONT color="green">051</FONT> <a name="line.51"></a>
<FONT color="green">052</FONT> <a name="line.52"></a>
<FONT color="green">053</FONT> /**<a name="line.53"></a>
<FONT color="green">054</FONT> * @author Jacek Ambroziak<a name="line.54"></a>
<FONT color="green">055</FONT> * @author Santiago Pericas-Geertsen<a name="line.55"></a>
<FONT color="green">056</FONT> * @author G. Todd Miller<a name="line.56"></a>
<FONT color="green">057</FONT> * @author Morten Jorensen<a name="line.57"></a>
<FONT color="green">058</FONT> * @author Erwin Bolwidt &lt;ejb@klomp.org&gt;<a name="line.58"></a>
<FONT color="green">059</FONT> * @author John Howard &lt;JohnH@schemasoft.com&gt;<a name="line.59"></a>
<FONT color="green">060</FONT> */<a name="line.60"></a>
<FONT color="green">061</FONT> public abstract class SyntaxTreeNode implements Constants {<a name="line.61"></a>
<FONT color="green">062</FONT> <a name="line.62"></a>
<FONT color="green">063</FONT> // Reference to the AST parser<a name="line.63"></a>
<FONT color="green">064</FONT> private Parser _parser;<a name="line.64"></a>
<FONT color="green">065</FONT> <a name="line.65"></a>
<FONT color="green">066</FONT> // AST navigation pointers<a name="line.66"></a>
<FONT color="green">067</FONT> protected SyntaxTreeNode _parent; // Parent node<a name="line.67"></a>
<FONT color="green">068</FONT> private Stylesheet _stylesheet; // Stylesheet ancestor node<a name="line.68"></a>
<FONT color="green">069</FONT> private Template _template; // Template ancestor node<a name="line.69"></a>
<FONT color="green">070</FONT> private final Vector _contents = new Vector(2); // Child nodes<a name="line.70"></a>
<FONT color="green">071</FONT> <a name="line.71"></a>
<FONT color="green">072</FONT> // Element description data<a name="line.72"></a>
<FONT color="green">073</FONT> protected QName _qname; // The element QName<a name="line.73"></a>
<FONT color="green">074</FONT> private int _line; // Source file line number<a name="line.74"></a>
<FONT color="green">075</FONT> protected AttributeList _attributes = null; // Attributes of this element<a name="line.75"></a>
<FONT color="green">076</FONT> private Hashtable _prefixMapping = null; // Namespace declarations<a name="line.76"></a>
<FONT color="green">077</FONT> <a name="line.77"></a>
<FONT color="green">078</FONT> public static final int UNKNOWN_STYLESHEET_NODE_ID = -1;<a name="line.78"></a>
<FONT color="green">079</FONT> <a name="line.79"></a>
<FONT color="green">080</FONT> // Records whether this node or any descendant needs to know the<a name="line.80"></a>
<FONT color="green">081</FONT> // in-scope namespaces at transform-time<a name="line.81"></a>
<FONT color="green">082</FONT> private int _nodeIDForStylesheetNSLookup = UNKNOWN_STYLESHEET_NODE_ID;<a name="line.82"></a>
<FONT color="green">083</FONT> <a name="line.83"></a>
<FONT color="green">084</FONT> // Sentinel - used to denote unrecognised syntaxt tree nodes.<a name="line.84"></a>
<FONT color="green">085</FONT> static final SyntaxTreeNode Dummy = new AbsolutePathPattern(null);<a name="line.85"></a>
<FONT color="green">086</FONT> <a name="line.86"></a>
<FONT color="green">087</FONT> // These two are used for indenting nodes in the AST (debug output)<a name="line.87"></a>
<FONT color="green">088</FONT> protected static final int IndentIncrement = 4;<a name="line.88"></a>
<FONT color="green">089</FONT> private static final char[] _spaces = <a name="line.89"></a>
<FONT color="green">090</FONT> " ".toCharArray();<a name="line.90"></a>
<FONT color="green">091</FONT> <a name="line.91"></a>
<FONT color="green">092</FONT> /**<a name="line.92"></a>
<FONT color="green">093</FONT> * Creates a new SyntaxTreeNode with a 'null' QName and no source file<a name="line.93"></a>
<FONT color="green">094</FONT> * line number reference.<a name="line.94"></a>
<FONT color="green">095</FONT> */<a name="line.95"></a>
<FONT color="green">096</FONT> public SyntaxTreeNode() {<a name="line.96"></a>
<FONT color="green">097</FONT> _line = 0;<a name="line.97"></a>
<FONT color="green">098</FONT> _qname = null;<a name="line.98"></a>
<FONT color="green">099</FONT> }<a name="line.99"></a>
<FONT color="green">100</FONT> <a name="line.100"></a>
<FONT color="green">101</FONT> /**<a name="line.101"></a>
<FONT color="green">102</FONT> * Creates a new SyntaxTreeNode with a 'null' QName.<a name="line.102"></a>
<FONT color="green">103</FONT> * @param line Source file line number reference<a name="line.103"></a>
<FONT color="green">104</FONT> */<a name="line.104"></a>
<FONT color="green">105</FONT> public SyntaxTreeNode(int line) {<a name="line.105"></a>
<FONT color="green">106</FONT> _line = line;<a name="line.106"></a>
<FONT color="green">107</FONT> _qname = null;<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> /**<a name="line.110"></a>
<FONT color="green">111</FONT> * Creates a new SyntaxTreeNode with no source file line number reference.<a name="line.111"></a>
<FONT color="green">112</FONT> * @param uri The element's namespace URI<a name="line.112"></a>
<FONT color="green">113</FONT> * @param prefix The element's namespace prefix<a name="line.113"></a>
<FONT color="green">114</FONT> * @param local The element's local name<a name="line.114"></a>
<FONT color="green">115</FONT> */<a name="line.115"></a>
<FONT color="green">116</FONT> public SyntaxTreeNode(String uri, String prefix, String local) {<a name="line.116"></a>
<FONT color="green">117</FONT> _line = 0;<a name="line.117"></a>
<FONT color="green">118</FONT> setQName(uri, prefix, local);<a name="line.118"></a>
<FONT color="green">119</FONT> }<a name="line.119"></a>
<FONT color="green">120</FONT> <a name="line.120"></a>
<FONT color="green">121</FONT> /**<a name="line.121"></a>
<FONT color="green">122</FONT> * Set the source file line number for this element<a name="line.122"></a>
<FONT color="green">123</FONT> * @param line The source file line number.<a name="line.123"></a>
<FONT color="green">124</FONT> */<a name="line.124"></a>
<FONT color="green">125</FONT> protected final void setLineNumber(int line) {<a name="line.125"></a>
<FONT color="green">126</FONT> _line = line;<a name="line.126"></a>
<FONT color="green">127</FONT> }<a name="line.127"></a>
<FONT color="green">128</FONT> <a name="line.128"></a>
<FONT color="green">129</FONT> /**<a name="line.129"></a>
<FONT color="green">130</FONT> * Get the source file line number for this element. If unavailable, lookup<a name="line.130"></a>
<FONT color="green">131</FONT> * in ancestors.<a name="line.131"></a>
<FONT color="green">132</FONT> *<a name="line.132"></a>
<FONT color="green">133</FONT> * @return The source file line number.<a name="line.133"></a>
<FONT color="green">134</FONT> */<a name="line.134"></a>
<FONT color="green">135</FONT> public final int getLineNumber() {<a name="line.135"></a>
<FONT color="green">136</FONT> if (_line &gt; 0) return _line;<a name="line.136"></a>
<FONT color="green">137</FONT> SyntaxTreeNode parent = getParent();<a name="line.137"></a>
<FONT color="green">138</FONT> return (parent != null) ? parent.getLineNumber() : 0;<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> * Set the QName for the syntax tree node.<a name="line.142"></a>
<FONT color="green">143</FONT> * @param qname The QName for the syntax tree node<a name="line.143"></a>
<FONT color="green">144</FONT> */<a name="line.144"></a>
<FONT color="green">145</FONT> protected void setQName(QName qname) {<a name="line.145"></a>
<FONT color="green">146</FONT> _qname = qname;<a name="line.146"></a>
<FONT color="green">147</FONT> }<a name="line.147"></a>
<FONT color="green">148</FONT> <a name="line.148"></a>
<FONT color="green">149</FONT> /**<a name="line.149"></a>
<FONT color="green">150</FONT> * Set the QName for the SyntaxTreeNode<a name="line.150"></a>
<FONT color="green">151</FONT> * @param uri The element's namespace URI<a name="line.151"></a>
<FONT color="green">152</FONT> * @param prefix The element's namespace prefix<a name="line.152"></a>
<FONT color="green">153</FONT> * @param local The element's local name<a name="line.153"></a>
<FONT color="green">154</FONT> */<a name="line.154"></a>
<FONT color="green">155</FONT> protected void setQName(String uri, String prefix, String localname) {<a name="line.155"></a>
<FONT color="green">156</FONT> _qname = new QName(uri, prefix, localname);<a name="line.156"></a>
<FONT color="green">157</FONT> }<a name="line.157"></a>
<FONT color="green">158</FONT> <a name="line.158"></a>
<FONT color="green">159</FONT> /**<a name="line.159"></a>
<FONT color="green">160</FONT> * Set the QName for the SyntaxTreeNode<a name="line.160"></a>
<FONT color="green">161</FONT> * @param qname The QName for the syntax tree node<a name="line.161"></a>
<FONT color="green">162</FONT> */<a name="line.162"></a>
<FONT color="green">163</FONT> protected QName getQName() {<a name="line.163"></a>
<FONT color="green">164</FONT> return(_qname);<a name="line.164"></a>
<FONT color="green">165</FONT> }<a name="line.165"></a>
<FONT color="green">166</FONT> <a name="line.166"></a>
<FONT color="green">167</FONT> /**<a name="line.167"></a>
<FONT color="green">168</FONT> * Set the attributes for this SyntaxTreeNode.<a name="line.168"></a>
<FONT color="green">169</FONT> * @param attributes Attributes for the element. Must be passed in as an<a name="line.169"></a>
<FONT color="green">170</FONT> * implementation of org.xml.sax.Attributes.<a name="line.170"></a>
<FONT color="green">171</FONT> */<a name="line.171"></a>
<FONT color="green">172</FONT> protected void setAttributes(AttributeList attributes) {<a name="line.172"></a>
<FONT color="green">173</FONT> _attributes = attributes;<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> * Returns a value for an attribute from the source element.<a name="line.177"></a>
<FONT color="green">178</FONT> * @param qname The QName of the attribute to return.<a name="line.178"></a>
<FONT color="green">179</FONT> * @return The value of the attribute of name 'qname'.<a name="line.179"></a>
<FONT color="green">180</FONT> */<a name="line.180"></a>
<FONT color="green">181</FONT> protected String getAttribute(String qname) {<a name="line.181"></a>
<FONT color="green">182</FONT> if (_attributes == null) {<a name="line.182"></a>
<FONT color="green">183</FONT> return EMPTYSTRING;<a name="line.183"></a>
<FONT color="green">184</FONT> }<a name="line.184"></a>
<FONT color="green">185</FONT> final String value = _attributes.getValue(qname);<a name="line.185"></a>
<FONT color="green">186</FONT> return (value == null || value.equals(EMPTYSTRING)) ? <a name="line.186"></a>
<FONT color="green">187</FONT> EMPTYSTRING : value;<a name="line.187"></a>
<FONT color="green">188</FONT> }<a name="line.188"></a>
<FONT color="green">189</FONT> <a name="line.189"></a>
<FONT color="green">190</FONT> protected String getAttribute(String prefix, String localName) {<a name="line.190"></a>
<FONT color="green">191</FONT> return getAttribute(prefix + ':' + localName);<a name="line.191"></a>
<FONT color="green">192</FONT> }<a name="line.192"></a>
<FONT color="green">193</FONT> <a name="line.193"></a>
<FONT color="green">194</FONT> protected boolean hasAttribute(String qname) {<a name="line.194"></a>
<FONT color="green">195</FONT> return (_attributes != null &amp;&amp; _attributes.getValue(qname) != null);<a name="line.195"></a>
<FONT color="green">196</FONT> }<a name="line.196"></a>
<FONT color="green">197</FONT> <a name="line.197"></a>
<FONT color="green">198</FONT> protected void addAttribute(String qname, String value) {<a name="line.198"></a>
<FONT color="green">199</FONT> _attributes.add(qname, value);<a name="line.199"></a>
<FONT color="green">200</FONT> }<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> * Returns a list of all attributes declared for the element represented by<a name="line.203"></a>
<FONT color="green">204</FONT> * this syntax tree node.<a name="line.204"></a>
<FONT color="green">205</FONT> * @return Attributes for this syntax tree node<a name="line.205"></a>
<FONT color="green">206</FONT> */<a name="line.206"></a>
<FONT color="green">207</FONT> protected Attributes getAttributes() {<a name="line.207"></a>
<FONT color="green">208</FONT> return(_attributes);<a name="line.208"></a>
<FONT color="green">209</FONT> }<a name="line.209"></a>
<FONT color="green">210</FONT> <a name="line.210"></a>
<FONT color="green">211</FONT> /**<a name="line.211"></a>
<FONT color="green">212</FONT> * Sets the prefix mapping for the namespaces that were declared in this<a name="line.212"></a>
<FONT color="green">213</FONT> * element. This does not include all prefix mappings in scope, so one<a name="line.213"></a>
<FONT color="green">214</FONT> * may have to check ancestor elements to get all mappings that are in<a name="line.214"></a>
<FONT color="green">215</FONT> * in scope. The prefixes must be passed in as a Hashtable that maps<a name="line.215"></a>
<FONT color="green">216</FONT> * namespace prefixes (String objects) to namespace URIs (also String).<a name="line.216"></a>
<FONT color="green">217</FONT> * @param mapping The Hashtable containing the mappings.<a name="line.217"></a>
<FONT color="green">218</FONT> */<a name="line.218"></a>
<FONT color="green">219</FONT> protected void setPrefixMapping(Hashtable mapping) {<a name="line.219"></a>
<FONT color="green">220</FONT> _prefixMapping = mapping;<a name="line.220"></a>
<FONT color="green">221</FONT> }<a name="line.221"></a>
<FONT color="green">222</FONT> <a name="line.222"></a>
<FONT color="green">223</FONT> /**<a name="line.223"></a>
<FONT color="green">224</FONT> * Returns a Hashtable containing the prefix mappings that were declared<a name="line.224"></a>
<FONT color="green">225</FONT> * for this element. This does not include all prefix mappings in scope,<a name="line.225"></a>
<FONT color="green">226</FONT> * so one may have to check ancestor elements to get all mappings that are<a name="line.226"></a>
<FONT color="green">227</FONT> * in in scope. <a name="line.227"></a>
<FONT color="green">228</FONT> * @return Prefix mappings (for this element only).<a name="line.228"></a>
<FONT color="green">229</FONT> */<a name="line.229"></a>
<FONT color="green">230</FONT> protected Hashtable getPrefixMapping() {<a name="line.230"></a>
<FONT color="green">231</FONT> return _prefixMapping;<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> /**<a name="line.234"></a>
<FONT color="green">235</FONT> * Adds a single prefix mapping to this syntax tree node.<a name="line.235"></a>
<FONT color="green">236</FONT> * @param prefix Namespace prefix.<a name="line.236"></a>
<FONT color="green">237</FONT> * @param uri Namespace URI.<a name="line.237"></a>
<FONT color="green">238</FONT> */<a name="line.238"></a>
<FONT color="green">239</FONT> protected void addPrefixMapping(String prefix, String uri) {<a name="line.239"></a>
<FONT color="green">240</FONT> if (_prefixMapping == null)<a name="line.240"></a>
<FONT color="green">241</FONT> _prefixMapping = new Hashtable();<a name="line.241"></a>
<FONT color="green">242</FONT> _prefixMapping.put(prefix, uri);<a name="line.242"></a>
<FONT color="green">243</FONT> }<a name="line.243"></a>
<FONT color="green">244</FONT> <a name="line.244"></a>
<FONT color="green">245</FONT> /**<a name="line.245"></a>
<FONT color="green">246</FONT> * Returns any namespace URI that is in scope for a given prefix. This<a name="line.246"></a>
<FONT color="green">247</FONT> * method checks namespace mappings for this element, and if necessary<a name="line.247"></a>
<FONT color="green">248</FONT> * for ancestor elements as well (ie. if the prefix maps to an URI in this<a name="line.248"></a>
<FONT color="green">249</FONT> * scope then you'll definately get the URI from this method).<a name="line.249"></a>
<FONT color="green">250</FONT> * @param prefix Namespace prefix.<a name="line.250"></a>
<FONT color="green">251</FONT> * @return Namespace URI.<a name="line.251"></a>
<FONT color="green">252</FONT> */<a name="line.252"></a>
<FONT color="green">253</FONT> protected String lookupNamespace(String prefix) {<a name="line.253"></a>
<FONT color="green">254</FONT> // Initialise the output (default is 'null' for undefined)<a name="line.254"></a>
<FONT color="green">255</FONT> String uri = null;<a name="line.255"></a>
<FONT color="green">256</FONT> <a name="line.256"></a>
<FONT color="green">257</FONT> // First look up the prefix/uri mapping in our own hashtable...<a name="line.257"></a>
<FONT color="green">258</FONT> if (_prefixMapping != null)<a name="line.258"></a>
<FONT color="green">259</FONT> uri = (String)_prefixMapping.get(prefix);<a name="line.259"></a>
<FONT color="green">260</FONT> // ... but if we can't find it there we ask our parent for the mapping<a name="line.260"></a>
<FONT color="green">261</FONT> if ((uri == null) &amp;&amp; (_parent != null)) {<a name="line.261"></a>
<FONT color="green">262</FONT> uri = _parent.lookupNamespace(prefix);<a name="line.262"></a>
<FONT color="green">263</FONT> if ((prefix == Constants.EMPTYSTRING) &amp;&amp; (uri == null))<a name="line.263"></a>
<FONT color="green">264</FONT> uri = Constants.EMPTYSTRING;<a name="line.264"></a>
<FONT color="green">265</FONT> }<a name="line.265"></a>
<FONT color="green">266</FONT> // ... and then we return whatever URI we've got.<a name="line.266"></a>
<FONT color="green">267</FONT> return(uri);<a name="line.267"></a>
<FONT color="green">268</FONT> }<a name="line.268"></a>
<FONT color="green">269</FONT> <a name="line.269"></a>
<FONT color="green">270</FONT> /**<a name="line.270"></a>
<FONT color="green">271</FONT> * Returns any namespace prefix that is mapped to a prefix in the current<a name="line.271"></a>
<FONT color="green">272</FONT> * scope. This method checks namespace mappings for this element, and if<a name="line.272"></a>
<FONT color="green">273</FONT> * necessary for ancestor elements as well (ie. if the URI is declared<a name="line.273"></a>
<FONT color="green">274</FONT> * within the current scope then you'll definately get the prefix from<a name="line.274"></a>
<FONT color="green">275</FONT> * this method). Note that this is a very slow method and consequentially<a name="line.275"></a>
<FONT color="green">276</FONT> * it should only be used strictly when needed.<a name="line.276"></a>
<FONT color="green">277</FONT> * @param uri Namespace URI.<a name="line.277"></a>
<FONT color="green">278</FONT> * @return Namespace prefix.<a name="line.278"></a>
<FONT color="green">279</FONT> */<a name="line.279"></a>
<FONT color="green">280</FONT> protected String lookupPrefix(String uri) {<a name="line.280"></a>
<FONT color="green">281</FONT> // Initialise the output (default is 'null' for undefined)<a name="line.281"></a>
<FONT color="green">282</FONT> String prefix = null;<a name="line.282"></a>
<FONT color="green">283</FONT> <a name="line.283"></a>
<FONT color="green">284</FONT> // First look up the prefix/uri mapping in our own hashtable...<a name="line.284"></a>
<FONT color="green">285</FONT> if ((_prefixMapping != null) &amp;&amp;<a name="line.285"></a>
<FONT color="green">286</FONT> (_prefixMapping.contains(uri))) {<a name="line.286"></a>
<FONT color="green">287</FONT> Enumeration prefixes = _prefixMapping.keys();<a name="line.287"></a>
<FONT color="green">288</FONT> while (prefixes.hasMoreElements()) {<a name="line.288"></a>
<FONT color="green">289</FONT> prefix = (String)prefixes.nextElement();<a name="line.289"></a>
<FONT color="green">290</FONT> String mapsTo = (String)_prefixMapping.get(prefix);<a name="line.290"></a>
<FONT color="green">291</FONT> if (mapsTo.equals(uri)) return(prefix);<a name="line.291"></a>
<FONT color="green">292</FONT> }<a name="line.292"></a>
<FONT color="green">293</FONT> }<a name="line.293"></a>
<FONT color="green">294</FONT> // ... but if we can't find it there we ask our parent for the mapping<a name="line.294"></a>
<FONT color="green">295</FONT> else if (_parent != null) {<a name="line.295"></a>
<FONT color="green">296</FONT> prefix = _parent.lookupPrefix(uri);<a name="line.296"></a>
<FONT color="green">297</FONT> if ((uri == Constants.EMPTYSTRING) &amp;&amp; (prefix == null))<a name="line.297"></a>
<FONT color="green">298</FONT> prefix = Constants.EMPTYSTRING;<a name="line.298"></a>
<FONT color="green">299</FONT> }<a name="line.299"></a>
<FONT color="green">300</FONT> return(prefix);<a name="line.300"></a>
<FONT color="green">301</FONT> }<a name="line.301"></a>
<FONT color="green">302</FONT> <a name="line.302"></a>
<FONT color="green">303</FONT> /**<a name="line.303"></a>
<FONT color="green">304</FONT> * Set this node's parser. The parser (the XSLT parser) gives this<a name="line.304"></a>
<FONT color="green">305</FONT> * syntax tree node access to the symbol table and XPath parser.<a name="line.305"></a>
<FONT color="green">306</FONT> * @param parser The XSLT parser.<a name="line.306"></a>
<FONT color="green">307</FONT> */<a name="line.307"></a>
<FONT color="green">308</FONT> protected void setParser(Parser parser) {<a name="line.308"></a>
<FONT color="green">309</FONT> _parser = parser;<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> * Returns this node's XSLT parser.<a name="line.313"></a>
<FONT color="green">314</FONT> * @return The XSLT parser.<a name="line.314"></a>
<FONT color="green">315</FONT> */<a name="line.315"></a>
<FONT color="green">316</FONT> public final Parser getParser() {<a name="line.316"></a>
<FONT color="green">317</FONT> return _parser;<a name="line.317"></a>
<FONT color="green">318</FONT> }<a name="line.318"></a>
<FONT color="green">319</FONT> <a name="line.319"></a>
<FONT color="green">320</FONT> /**<a name="line.320"></a>
<FONT color="green">321</FONT> * Set this syntax tree node's parent node<a name="line.321"></a>
<FONT color="green">322</FONT> * @param parent The parent node.<a name="line.322"></a>
<FONT color="green">323</FONT> */<a name="line.323"></a>
<FONT color="green">324</FONT> protected void setParent(SyntaxTreeNode parent) {<a name="line.324"></a>
<FONT color="green">325</FONT> if (_parent == null)<a name="line.325"></a>
<FONT color="green">326</FONT> _parent = parent;<a name="line.326"></a>
<FONT color="green">327</FONT> }<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> * Returns this syntax tree node's parent node.<a name="line.330"></a>
<FONT color="green">331</FONT> * @return The parent syntax tree node.<a name="line.331"></a>
<FONT color="green">332</FONT> */<a name="line.332"></a>
<FONT color="green">333</FONT> protected final SyntaxTreeNode getParent() {<a name="line.333"></a>
<FONT color="green">334</FONT> return _parent;<a name="line.334"></a>
<FONT color="green">335</FONT> }<a name="line.335"></a>
<FONT color="green">336</FONT> <a name="line.336"></a>
<FONT color="green">337</FONT> /**<a name="line.337"></a>
<FONT color="green">338</FONT> * Returns 'true' if this syntax tree node is the Sentinal node.<a name="line.338"></a>
<FONT color="green">339</FONT> * @return 'true' if this syntax tree node is the Sentinal node.<a name="line.339"></a>
<FONT color="green">340</FONT> */<a name="line.340"></a>
<FONT color="green">341</FONT> protected final boolean isDummy() {<a name="line.341"></a>
<FONT color="green">342</FONT> return this == Dummy;<a name="line.342"></a>
<FONT color="green">343</FONT> }<a name="line.343"></a>
<FONT color="green">344</FONT> <a name="line.344"></a>
<FONT color="green">345</FONT> /**<a name="line.345"></a>
<FONT color="green">346</FONT> * Get the import precedence of this element. The import precedence equals<a name="line.346"></a>
<FONT color="green">347</FONT> * the import precedence of the stylesheet in which this element occured.<a name="line.347"></a>
<FONT color="green">348</FONT> * @return The import precedence of this syntax tree node.<a name="line.348"></a>
<FONT color="green">349</FONT> */<a name="line.349"></a>
<FONT color="green">350</FONT> protected int getImportPrecedence() {<a name="line.350"></a>
<FONT color="green">351</FONT> Stylesheet stylesheet = getStylesheet();<a name="line.351"></a>
<FONT color="green">352</FONT> if (stylesheet == null) return Integer.MIN_VALUE;<a name="line.352"></a>
<FONT color="green">353</FONT> return stylesheet.getImportPrecedence();<a name="line.353"></a>
<FONT color="green">354</FONT> }<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> * Get the Stylesheet node that represents the &lt;xsl:stylesheet/&gt; element<a name="line.357"></a>
<FONT color="green">358</FONT> * that this node occured under.<a name="line.358"></a>
<FONT color="green">359</FONT> * @return The Stylesheet ancestor node of this node.<a name="line.359"></a>
<FONT color="green">360</FONT> */<a name="line.360"></a>
<FONT color="green">361</FONT> public Stylesheet getStylesheet() {<a name="line.361"></a>
<FONT color="green">362</FONT> if (_stylesheet == null) {<a name="line.362"></a>
<FONT color="green">363</FONT> SyntaxTreeNode parent = this;<a name="line.363"></a>
<FONT color="green">364</FONT> while (parent != null) {<a name="line.364"></a>
<FONT color="green">365</FONT> if (parent instanceof Stylesheet)<a name="line.365"></a>
<FONT color="green">366</FONT> return((Stylesheet)parent);<a name="line.366"></a>
<FONT color="green">367</FONT> parent = parent.getParent();<a name="line.367"></a>
<FONT color="green">368</FONT> }<a name="line.368"></a>
<FONT color="green">369</FONT> _stylesheet = (Stylesheet)parent;<a name="line.369"></a>
<FONT color="green">370</FONT> }<a name="line.370"></a>
<FONT color="green">371</FONT> return(_stylesheet);<a name="line.371"></a>
<FONT color="green">372</FONT> }<a name="line.372"></a>
<FONT color="green">373</FONT> <a name="line.373"></a>
<FONT color="green">374</FONT> /**<a name="line.374"></a>
<FONT color="green">375</FONT> * Get the Template node that represents the &lt;xsl:template/&gt; element<a name="line.375"></a>
<FONT color="green">376</FONT> * that this node occured under. Note that this method will return 'null'<a name="line.376"></a>
<FONT color="green">377</FONT> * for nodes that represent top-level elements.<a name="line.377"></a>
<FONT color="green">378</FONT> * @return The Template ancestor node of this node or 'null'.<a name="line.378"></a>
<FONT color="green">379</FONT> */<a name="line.379"></a>
<FONT color="green">380</FONT> protected Template getTemplate() {<a name="line.380"></a>
<FONT color="green">381</FONT> if (_template == null) {<a name="line.381"></a>
<FONT color="green">382</FONT> SyntaxTreeNode parent = this;<a name="line.382"></a>
<FONT color="green">383</FONT> while ((parent != null) &amp;&amp; (!(parent instanceof Template)))<a name="line.383"></a>
<FONT color="green">384</FONT> parent = parent.getParent();<a name="line.384"></a>
<FONT color="green">385</FONT> _template = (Template)parent;<a name="line.385"></a>
<FONT color="green">386</FONT> }<a name="line.386"></a>
<FONT color="green">387</FONT> return(_template);<a name="line.387"></a>
<FONT color="green">388</FONT> }<a name="line.388"></a>
<FONT color="green">389</FONT> <a name="line.389"></a>
<FONT color="green">390</FONT> /**<a name="line.390"></a>
<FONT color="green">391</FONT> * Returns a reference to the XSLTC (XSLT compiler) in use.<a name="line.391"></a>
<FONT color="green">392</FONT> * @return XSLTC - XSLT compiler.<a name="line.392"></a>
<FONT color="green">393</FONT> */<a name="line.393"></a>
<FONT color="green">394</FONT> protected final XSLTC getXSLTC() {<a name="line.394"></a>
<FONT color="green">395</FONT> return _parser.getXSLTC();<a name="line.395"></a>
<FONT color="green">396</FONT> }<a name="line.396"></a>
<FONT color="green">397</FONT> <a name="line.397"></a>
<FONT color="green">398</FONT> /**<a name="line.398"></a>
<FONT color="green">399</FONT> * Returns the XSLT parser's symbol table.<a name="line.399"></a>
<FONT color="green">400</FONT> * @return Symbol table.<a name="line.400"></a>
<FONT color="green">401</FONT> */<a name="line.401"></a>
<FONT color="green">402</FONT> protected final SymbolTable getSymbolTable() {<a name="line.402"></a>
<FONT color="green">403</FONT> return (_parser == null) ? null : _parser.getSymbolTable();<a name="line.403"></a>
<FONT color="green">404</FONT> }<a name="line.404"></a>
<FONT color="green">405</FONT> <a name="line.405"></a>
<FONT color="green">406</FONT> /**<a name="line.406"></a>
<FONT color="green">407</FONT> * Parse the contents of this syntax tree nodes (child nodes, XPath<a name="line.407"></a>
<FONT color="green">408</FONT> * expressions, patterns and functions). The default behaviour is to parser<a name="line.408"></a>
<FONT color="green">409</FONT> * the syntax tree node's children (since there are no common expressions,<a name="line.409"></a>
<FONT color="green">410</FONT> * patterns, etc. that can be handled in this base class.<a name="line.410"></a>
<FONT color="green">411</FONT> * @param parser reference to the XSLT parser<a name="line.411"></a>
<FONT color="green">412</FONT> */<a name="line.412"></a>
<FONT color="green">413</FONT> public void parseContents(Parser parser) {<a name="line.413"></a>
<FONT color="green">414</FONT> parseChildren(parser);<a name="line.414"></a>
<FONT color="green">415</FONT> }<a name="line.415"></a>
<FONT color="green">416</FONT> <a name="line.416"></a>
<FONT color="green">417</FONT> /**<a name="line.417"></a>
<FONT color="green">418</FONT> * Parse all children of this syntax tree node. This method is normally<a name="line.418"></a>
<FONT color="green">419</FONT> * called by the parseContents() method.<a name="line.419"></a>
<FONT color="green">420</FONT> * @param parser reference to the XSLT parser<a name="line.420"></a>
<FONT color="green">421</FONT> */<a name="line.421"></a>
<FONT color="green">422</FONT> protected final void parseChildren(Parser parser) {<a name="line.422"></a>
<FONT color="green">423</FONT> <a name="line.423"></a>
<FONT color="green">424</FONT> Vector locals = null; // only create when needed<a name="line.424"></a>
<FONT color="green">425</FONT> <a name="line.425"></a>
<FONT color="green">426</FONT> final int count = _contents.size();<a name="line.426"></a>
<FONT color="green">427</FONT> for (int i=0; i&lt;count; i++) {<a name="line.427"></a>
<FONT color="green">428</FONT> SyntaxTreeNode child = (SyntaxTreeNode)_contents.elementAt(i);<a name="line.428"></a>
<FONT color="green">429</FONT> parser.getSymbolTable().setCurrentNode(child);<a name="line.429"></a>
<FONT color="green">430</FONT> child.parseContents(parser);<a name="line.430"></a>
<FONT color="green">431</FONT> // if variable or parameter, add it to scope<a name="line.431"></a>
<FONT color="green">432</FONT> final QName varOrParamName = updateScope(parser, child);<a name="line.432"></a>
<FONT color="green">433</FONT> if (varOrParamName != null) {<a name="line.433"></a>
<FONT color="green">434</FONT> if (locals == null) {<a name="line.434"></a>
<FONT color="green">435</FONT> locals = new Vector(2);<a name="line.435"></a>
<FONT color="green">436</FONT> }<a name="line.436"></a>
<FONT color="green">437</FONT> locals.addElement(varOrParamName);<a name="line.437"></a>
<FONT color="green">438</FONT> }<a name="line.438"></a>
<FONT color="green">439</FONT> }<a name="line.439"></a>
<FONT color="green">440</FONT> <a name="line.440"></a>
<FONT color="green">441</FONT> parser.getSymbolTable().setCurrentNode(this);<a name="line.441"></a>
<FONT color="green">442</FONT> <a name="line.442"></a>
<FONT color="green">443</FONT> // after the last element, remove any locals from scope<a name="line.443"></a>
<FONT color="green">444</FONT> if (locals != null) {<a name="line.444"></a>
<FONT color="green">445</FONT> final int nLocals = locals.size();<a name="line.445"></a>
<FONT color="green">446</FONT> for (int i = 0; i &lt; nLocals; i++) {<a name="line.446"></a>
<FONT color="green">447</FONT> parser.removeVariable((QName)locals.elementAt(i));<a name="line.447"></a>
<FONT color="green">448</FONT> }<a name="line.448"></a>
<FONT color="green">449</FONT> }<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> /**<a name="line.452"></a>
<FONT color="green">453</FONT> * Add a node to the current scope and return name of a variable or<a name="line.453"></a>
<FONT color="green">454</FONT> * parameter if the node represents a variable or a parameter.<a name="line.454"></a>
<FONT color="green">455</FONT> */<a name="line.455"></a>
<FONT color="green">456</FONT> protected QName updateScope(Parser parser, SyntaxTreeNode node) {<a name="line.456"></a>
<FONT color="green">457</FONT> if (node instanceof Variable) {<a name="line.457"></a>
<FONT color="green">458</FONT> final Variable var = (Variable)node;<a name="line.458"></a>
<FONT color="green">459</FONT> parser.addVariable(var);<a name="line.459"></a>
<FONT color="green">460</FONT> return var.getName();<a name="line.460"></a>
<FONT color="green">461</FONT> }<a name="line.461"></a>
<FONT color="green">462</FONT> else if (node instanceof Param) {<a name="line.462"></a>
<FONT color="green">463</FONT> final Param param = (Param)node;<a name="line.463"></a>
<FONT color="green">464</FONT> parser.addParameter(param);<a name="line.464"></a>
<FONT color="green">465</FONT> return param.getName();<a name="line.465"></a>
<FONT color="green">466</FONT> }<a name="line.466"></a>
<FONT color="green">467</FONT> else {<a name="line.467"></a>
<FONT color="green">468</FONT> return null;<a name="line.468"></a>
<FONT color="green">469</FONT> }<a name="line.469"></a>
<FONT color="green">470</FONT> }<a name="line.470"></a>
<FONT color="green">471</FONT> <a name="line.471"></a>
<FONT color="green">472</FONT> /**<a name="line.472"></a>
<FONT color="green">473</FONT> * Type check the children of this node. The type check phase may add<a name="line.473"></a>
<FONT color="green">474</FONT> * coercions (CastExpr) to the AST.<a name="line.474"></a>
<FONT color="green">475</FONT> * @param stable The compiler/parser's symbol table<a name="line.475"></a>
<FONT color="green">476</FONT> */<a name="line.476"></a>
<FONT color="green">477</FONT> public abstract Type typeCheck(SymbolTable stable) throws TypeCheckError;<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> * Call typeCheck() on all child syntax tree nodes.<a name="line.480"></a>
<FONT color="green">481</FONT> * @param stable The compiler/parser's symbol table<a name="line.481"></a>
<FONT color="green">482</FONT> */<a name="line.482"></a>
<FONT color="green">483</FONT> protected Type typeCheckContents(SymbolTable stable) throws TypeCheckError {<a name="line.483"></a>
<FONT color="green">484</FONT> final int n = elementCount();<a name="line.484"></a>
<FONT color="green">485</FONT> for (int i = 0; i &lt; n; i++) {<a name="line.485"></a>
<FONT color="green">486</FONT> SyntaxTreeNode item = (SyntaxTreeNode)_contents.elementAt(i);<a name="line.486"></a>
<FONT color="green">487</FONT> item.typeCheck(stable);<a name="line.487"></a>
<FONT color="green">488</FONT> }<a name="line.488"></a>
<FONT color="green">489</FONT> return Type.Void;<a name="line.489"></a>
<FONT color="green">490</FONT> }<a name="line.490"></a>
<FONT color="green">491</FONT> <a name="line.491"></a>
<FONT color="green">492</FONT> /**<a name="line.492"></a>
<FONT color="green">493</FONT> * Translate this abstract syntax tree node into JVM bytecodes.<a name="line.493"></a>
<FONT color="green">494</FONT> * @param classGen BCEL Java class generator<a name="line.494"></a>
<FONT color="green">495</FONT> * @param methodGen BCEL Java method generator<a name="line.495"></a>
<FONT color="green">496</FONT> */<a name="line.496"></a>
<FONT color="green">497</FONT> public abstract void translate(ClassGenerator classGen,<a name="line.497"></a>
<FONT color="green">498</FONT> MethodGenerator methodGen);<a name="line.498"></a>
<FONT color="green">499</FONT> <a name="line.499"></a>
<FONT color="green">500</FONT> /**<a name="line.500"></a>
<FONT color="green">501</FONT> * Call translate() on all child syntax tree nodes.<a name="line.501"></a>
<FONT color="green">502</FONT> * @param classGen BCEL Java class generator<a name="line.502"></a>
<FONT color="green">503</FONT> * @param methodGen BCEL Java method generator<a name="line.503"></a>
<FONT color="green">504</FONT> */<a name="line.504"></a>
<FONT color="green">505</FONT> protected void translateContents(ClassGenerator classGen,<a name="line.505"></a>
<FONT color="green">506</FONT> MethodGenerator methodGen) {<a name="line.506"></a>
<FONT color="green">507</FONT> // Call translate() on all child nodes<a name="line.507"></a>
<FONT color="green">508</FONT> final int n = elementCount();<a name="line.508"></a>
<FONT color="green">509</FONT> <a name="line.509"></a>
<FONT color="green">510</FONT> for (int i = 0; i &lt; n; i++) {<a name="line.510"></a>
<FONT color="green">511</FONT> methodGen.markChunkStart();<a name="line.511"></a>
<FONT color="green">512</FONT> final SyntaxTreeNode item = (SyntaxTreeNode)_contents.elementAt(i);<a name="line.512"></a>
<FONT color="green">513</FONT> item.translate(classGen, methodGen);<a name="line.513"></a>
<FONT color="green">514</FONT> methodGen.markChunkEnd();<a name="line.514"></a>
<FONT color="green">515</FONT> }<a name="line.515"></a>
<FONT color="green">516</FONT> <a name="line.516"></a>
<FONT color="green">517</FONT> // After translation, unmap any registers for any variables/parameters<a name="line.517"></a>
<FONT color="green">518</FONT> // that were declared in this scope. Performing this unmapping in the<a name="line.518"></a>
<FONT color="green">519</FONT> // same AST scope as the declaration deals with the problems of<a name="line.519"></a>
<FONT color="green">520</FONT> // references falling out-of-scope inside the for-each element.<a name="line.520"></a>
<FONT color="green">521</FONT> // (the cause of which being 'lazy' register allocation for references)<a name="line.521"></a>
<FONT color="green">522</FONT> for (int i = 0; i &lt; n; i++) {<a name="line.522"></a>
<FONT color="green">523</FONT> if( _contents.elementAt(i) instanceof VariableBase) {<a name="line.523"></a>
<FONT color="green">524</FONT> final VariableBase var = (VariableBase)_contents.elementAt(i);<a name="line.524"></a>
<FONT color="green">525</FONT> var.unmapRegister(methodGen);<a name="line.525"></a>
<FONT color="green">526</FONT> }<a name="line.526"></a>
<FONT color="green">527</FONT> }<a name="line.527"></a>
<FONT color="green">528</FONT> }<a name="line.528"></a>
<FONT color="green">529</FONT> <a name="line.529"></a>
<FONT color="green">530</FONT> /**<a name="line.530"></a>
<FONT color="green">531</FONT> * Return true if the node represents a simple RTF.<a name="line.531"></a>
<FONT color="green">532</FONT> *<a name="line.532"></a>
<FONT color="green">533</FONT> * A node is a simple RTF if all children only produce Text value.<a name="line.533"></a>
<FONT color="green">534</FONT> *<a name="line.534"></a>
<FONT color="green">535</FONT> * @param node A node<a name="line.535"></a>
<FONT color="green">536</FONT> * @return true if the node content can be considered as a simple RTF.<a name="line.536"></a>
<FONT color="green">537</FONT> */<a name="line.537"></a>
<FONT color="green">538</FONT> private boolean isSimpleRTF(SyntaxTreeNode node) {<a name="line.538"></a>
<FONT color="green">539</FONT> <a name="line.539"></a>
<FONT color="green">540</FONT> Vector contents = node.getContents();<a name="line.540"></a>
<FONT color="green">541</FONT> for (int i = 0; i &lt; contents.size(); i++) {<a name="line.541"></a>
<FONT color="green">542</FONT> SyntaxTreeNode item = (SyntaxTreeNode)contents.elementAt(i);<a name="line.542"></a>
<FONT color="green">543</FONT> if (!isTextElement(item, false))<a name="line.543"></a>
<FONT color="green">544</FONT> return false;<a name="line.544"></a>
<FONT color="green">545</FONT> }<a name="line.545"></a>
<FONT color="green">546</FONT> <a name="line.546"></a>
<FONT color="green">547</FONT> return true;<a name="line.547"></a>
<FONT color="green">548</FONT> }<a name="line.548"></a>
<FONT color="green">549</FONT> <a name="line.549"></a>
<FONT color="green">550</FONT> /**<a name="line.550"></a>
<FONT color="green">551</FONT> * Return true if the node represents an adaptive RTF.<a name="line.551"></a>
<FONT color="green">552</FONT> *<a name="line.552"></a>
<FONT color="green">553</FONT> * A node is an adaptive RTF if each children is a Text element<a name="line.553"></a>
<FONT color="green">554</FONT> * or it is &lt;xsl:call-template&gt; or &lt;xsl:apply-templates&gt;.<a name="line.554"></a>
<FONT color="green">555</FONT> *<a name="line.555"></a>
<FONT color="green">556</FONT> * @param node A node<a name="line.556"></a>
<FONT color="green">557</FONT> * @return true if the node content can be considered as an adaptive RTF.<a name="line.557"></a>
<FONT color="green">558</FONT> */<a name="line.558"></a>
<FONT color="green">559</FONT> private boolean isAdaptiveRTF(SyntaxTreeNode node) {<a name="line.559"></a>
<FONT color="green">560</FONT> <a name="line.560"></a>
<FONT color="green">561</FONT> Vector contents = node.getContents();<a name="line.561"></a>
<FONT color="green">562</FONT> for (int i = 0; i &lt; contents.size(); i++) {<a name="line.562"></a>
<FONT color="green">563</FONT> SyntaxTreeNode item = (SyntaxTreeNode)contents.elementAt(i);<a name="line.563"></a>
<FONT color="green">564</FONT> if (!isTextElement(item, true))<a name="line.564"></a>
<FONT color="green">565</FONT> return false;<a name="line.565"></a>
<FONT color="green">566</FONT> }<a name="line.566"></a>
<FONT color="green">567</FONT> <a name="line.567"></a>
<FONT color="green">568</FONT> return true;<a name="line.568"></a>
<FONT color="green">569</FONT> }<a name="line.569"></a>
<FONT color="green">570</FONT> <a name="line.570"></a>
<FONT color="green">571</FONT> /**<a name="line.571"></a>
<FONT color="green">572</FONT> * Return true if the node only produces Text content.<a name="line.572"></a>
<FONT color="green">573</FONT> *<a name="line.573"></a>
<FONT color="green">574</FONT> * A node is a Text element if it is Text, xsl:value-of, xsl:number, <a name="line.574"></a>
<FONT color="green">575</FONT> * or a combination of these nested in a control instruction (xsl:if or<a name="line.575"></a>
<FONT color="green">576</FONT> * xsl:choose).<a name="line.576"></a>
<FONT color="green">577</FONT> *<a name="line.577"></a>
<FONT color="green">578</FONT> * If the doExtendedCheck flag is true, xsl:call-template and xsl:apply-templates<a name="line.578"></a>
<FONT color="green">579</FONT> * are also considered as Text elements.<a name="line.579"></a>
<FONT color="green">580</FONT> *<a name="line.580"></a>
<FONT color="green">581</FONT> * @param node A node<a name="line.581"></a>
<FONT color="green">582</FONT> * @param doExtendedCheck If this flag is true, &lt;xsl:call-template&gt; and <a name="line.582"></a>
<FONT color="green">583</FONT> * &lt;xsl:apply-templates&gt; are also considered as Text elements.<a name="line.583"></a>
<FONT color="green">584</FONT> *<a name="line.584"></a>
<FONT color="green">585</FONT> * @return true if the node of Text type<a name="line.585"></a>
<FONT color="green">586</FONT> */<a name="line.586"></a>
<FONT color="green">587</FONT> private boolean isTextElement(SyntaxTreeNode node, boolean doExtendedCheck) {<a name="line.587"></a>
<FONT color="green">588</FONT> if (node instanceof ValueOf || node instanceof Number<a name="line.588"></a>
<FONT color="green">589</FONT> || node instanceof Text)<a name="line.589"></a>
<FONT color="green">590</FONT> {<a name="line.590"></a>
<FONT color="green">591</FONT> return true;<a name="line.591"></a>
<FONT color="green">592</FONT> }<a name="line.592"></a>
<FONT color="green">593</FONT> else if (node instanceof If) {<a name="line.593"></a>
<FONT color="green">594</FONT> return doExtendedCheck ? isAdaptiveRTF(node) : isSimpleRTF(node);<a name="line.594"></a>
<FONT color="green">595</FONT> }<a name="line.595"></a>
<FONT color="green">596</FONT> else if (node instanceof Choose) {<a name="line.596"></a>
<FONT color="green">597</FONT> Vector contents = node.getContents();<a name="line.597"></a>
<FONT color="green">598</FONT> for (int i = 0; i &lt; contents.size(); i++) {<a name="line.598"></a>
<FONT color="green">599</FONT> SyntaxTreeNode item = (SyntaxTreeNode)contents.elementAt(i);<a name="line.599"></a>
<FONT color="green">600</FONT> if (item instanceof Text || <a name="line.600"></a>
<FONT color="green">601</FONT> ((item instanceof When || item instanceof Otherwise)<a name="line.601"></a>
<FONT color="green">602</FONT> &amp;&amp; ((doExtendedCheck &amp;&amp; isAdaptiveRTF(item))<a name="line.602"></a>
<FONT color="green">603</FONT> || (!doExtendedCheck &amp;&amp; isSimpleRTF(item)))))<a name="line.603"></a>
<FONT color="green">604</FONT> continue;<a name="line.604"></a>
<FONT color="green">605</FONT> else<a name="line.605"></a>
<FONT color="green">606</FONT> return false;<a name="line.606"></a>
<FONT color="green">607</FONT> }<a name="line.607"></a>
<FONT color="green">608</FONT> return true;<a name="line.608"></a>
<FONT color="green">609</FONT> }<a name="line.609"></a>
<FONT color="green">610</FONT> else if (doExtendedCheck &amp;&amp; <a name="line.610"></a>
<FONT color="green">611</FONT> (node instanceof CallTemplate<a name="line.611"></a>
<FONT color="green">612</FONT> || node instanceof ApplyTemplates))<a name="line.612"></a>
<FONT color="green">613</FONT> return true;<a name="line.613"></a>
<FONT color="green">614</FONT> else<a name="line.614"></a>
<FONT color="green">615</FONT> return false;<a name="line.615"></a>
<FONT color="green">616</FONT> }<a name="line.616"></a>
<FONT color="green">617</FONT> <a name="line.617"></a>
<FONT color="green">618</FONT> /**<a name="line.618"></a>
<FONT color="green">619</FONT> * Utility method used by parameters and variables to store result trees<a name="line.619"></a>
<FONT color="green">620</FONT> * @param classGen BCEL Java class generator<a name="line.620"></a>
<FONT color="green">621</FONT> * @param methodGen BCEL Java method generator<a name="line.621"></a>
<FONT color="green">622</FONT> */<a name="line.622"></a>
<FONT color="green">623</FONT> protected void compileResultTree(ClassGenerator classGen,<a name="line.623"></a>
<FONT color="green">624</FONT> MethodGenerator methodGen) <a name="line.624"></a>
<FONT color="green">625</FONT> {<a name="line.625"></a>
<FONT color="green">626</FONT> final ConstantPoolGen cpg = classGen.getConstantPool();<a name="line.626"></a>
<FONT color="green">627</FONT> final InstructionList il = methodGen.getInstructionList();<a name="line.627"></a>
<FONT color="green">628</FONT> final Stylesheet stylesheet = classGen.getStylesheet();<a name="line.628"></a>
<FONT color="green">629</FONT> <a name="line.629"></a>
<FONT color="green">630</FONT> boolean isSimple = isSimpleRTF(this);<a name="line.630"></a>
<FONT color="green">631</FONT> boolean isAdaptive = false;<a name="line.631"></a>
<FONT color="green">632</FONT> if (!isSimple) {<a name="line.632"></a>
<FONT color="green">633</FONT> isAdaptive = isAdaptiveRTF(this);<a name="line.633"></a>
<FONT color="green">634</FONT> }<a name="line.634"></a>
<FONT color="green">635</FONT> <a name="line.635"></a>
<FONT color="green">636</FONT> int rtfType = isSimple ? DOM.SIMPLE_RTF<a name="line.636"></a>
<FONT color="green">637</FONT> : (isAdaptive ? DOM.ADAPTIVE_RTF : DOM.TREE_RTF);<a name="line.637"></a>
<FONT color="green">638</FONT> <a name="line.638"></a>
<FONT color="green">639</FONT> // Save the current handler base on the stack<a name="line.639"></a>
<FONT color="green">640</FONT> il.append(methodGen.loadHandler());<a name="line.640"></a>
<FONT color="green">641</FONT> <a name="line.641"></a>
<FONT color="green">642</FONT> final String DOM_CLASS = classGen.getDOMClass();<a name="line.642"></a>
<FONT color="green">643</FONT> <a name="line.643"></a>
<FONT color="green">644</FONT> // Create new instance of DOM class (with RTF_INITIAL_SIZE nodes)<a name="line.644"></a>
<FONT color="green">645</FONT> //int index = cpg.addMethodref(DOM_IMPL, "&lt;init&gt;", "(I)V");<a name="line.645"></a>
<FONT color="green">646</FONT> //il.append(new NEW(cpg.addClass(DOM_IMPL)));<a name="line.646"></a>
<FONT color="green">647</FONT> <a name="line.647"></a>
<FONT color="green">648</FONT> il.append(methodGen.loadDOM());<a name="line.648"></a>
<FONT color="green">649</FONT> int index = cpg.addInterfaceMethodref(DOM_INTF,<a name="line.649"></a>
<FONT color="green">650</FONT> "getResultTreeFrag",<a name="line.650"></a>
<FONT color="green">651</FONT> "(IIZ)" + DOM_INTF_SIG);<a name="line.651"></a>
<FONT color="green">652</FONT> il.append(new PUSH(cpg, RTF_INITIAL_SIZE));<a name="line.652"></a>
<FONT color="green">653</FONT> il.append(new PUSH(cpg, rtfType));<a name="line.653"></a>
<FONT color="green">654</FONT> il.append(new PUSH(cpg, stylesheet.callsNodeset()));<a name="line.654"></a>
<FONT color="green">655</FONT> il.append(new INVOKEINTERFACE(index,4));<a name="line.655"></a>
<FONT color="green">656</FONT> <a name="line.656"></a>
<FONT color="green">657</FONT> il.append(DUP);<a name="line.657"></a>
<FONT color="green">658</FONT> <a name="line.658"></a>
<FONT color="green">659</FONT> // Overwrite old handler with DOM handler<a name="line.659"></a>
<FONT color="green">660</FONT> index = cpg.addInterfaceMethodref(DOM_INTF,<a name="line.660"></a>
<FONT color="green">661</FONT> "getOutputDomBuilder",<a name="line.661"></a>
<FONT color="green">662</FONT> "()" + TRANSLET_OUTPUT_SIG);<a name="line.662"></a>
<FONT color="green">663</FONT> <a name="line.663"></a>
<FONT color="green">664</FONT> il.append(new INVOKEINTERFACE(index,1));<a name="line.664"></a>
<FONT color="green">665</FONT> il.append(DUP);<a name="line.665"></a>
<FONT color="green">666</FONT> il.append(methodGen.storeHandler());<a name="line.666"></a>
<FONT color="green">667</FONT> <a name="line.667"></a>
<FONT color="green">668</FONT> // Call startDocument on the new handler<a name="line.668"></a>
<FONT color="green">669</FONT> il.append(methodGen.startDocument());<a name="line.669"></a>
<FONT color="green">670</FONT> <a name="line.670"></a>
<FONT color="green">671</FONT> // Instantiate result tree fragment<a name="line.671"></a>
<FONT color="green">672</FONT> translateContents(classGen, methodGen);<a name="line.672"></a>
<FONT color="green">673</FONT> <a name="line.673"></a>
<FONT color="green">674</FONT> // Call endDocument on the new handler<a name="line.674"></a>
<FONT color="green">675</FONT> il.append(methodGen.loadHandler());<a name="line.675"></a>
<FONT color="green">676</FONT> il.append(methodGen.endDocument());<a name="line.676"></a>
<FONT color="green">677</FONT> <a name="line.677"></a>
<FONT color="green">678</FONT> // Check if we need to wrap the DOMImpl object in a DOMAdapter object.<a name="line.678"></a>
<FONT color="green">679</FONT> // DOMAdapter is not needed if the RTF is a simple RTF and the nodeset()<a name="line.679"></a>
<FONT color="green">680</FONT> // function is not used.<a name="line.680"></a>
<FONT color="green">681</FONT> if (stylesheet.callsNodeset()<a name="line.681"></a>
<FONT color="green">682</FONT> &amp;&amp; !DOM_CLASS.equals(DOM_IMPL_CLASS)) {<a name="line.682"></a>
<FONT color="green">683</FONT> // new org.apache.xalan.xsltc.dom.DOMAdapter(DOMImpl,String[]);<a name="line.683"></a>
<FONT color="green">684</FONT> index = cpg.addMethodref(DOM_ADAPTER_CLASS,<a name="line.684"></a>
<FONT color="green">685</FONT> "&lt;init&gt;",<a name="line.685"></a>
<FONT color="green">686</FONT> "("+DOM_INTF_SIG+<a name="line.686"></a>
<FONT color="green">687</FONT> "["+STRING_SIG+<a name="line.687"></a>
<FONT color="green">688</FONT> "["+STRING_SIG+<a name="line.688"></a>
<FONT color="green">689</FONT> "[I"+<a name="line.689"></a>
<FONT color="green">690</FONT> "["+STRING_SIG+")V");<a name="line.690"></a>
<FONT color="green">691</FONT> il.append(new NEW(cpg.addClass(DOM_ADAPTER_CLASS)));<a name="line.691"></a>
<FONT color="green">692</FONT> il.append(new DUP_X1());<a name="line.692"></a>
<FONT color="green">693</FONT> il.append(SWAP);<a name="line.693"></a>
<FONT color="green">694</FONT> <a name="line.694"></a>
<FONT color="green">695</FONT> /*<a name="line.695"></a>
<FONT color="green">696</FONT> * Give the DOM adapter an empty type mapping if the nodeset<a name="line.696"></a>
<FONT color="green">697</FONT> * extension function is never called.<a name="line.697"></a>
<FONT color="green">698</FONT> */<a name="line.698"></a>
<FONT color="green">699</FONT> if (!stylesheet.callsNodeset()) {<a name="line.699"></a>
<FONT color="green">700</FONT> il.append(new ICONST(0));<a name="line.700"></a>
<FONT color="green">701</FONT> il.append(new ANEWARRAY(cpg.addClass(STRING)));<a name="line.701"></a>
<FONT color="green">702</FONT> il.append(DUP);<a name="line.702"></a>
<FONT color="green">703</FONT> il.append(DUP);<a name="line.703"></a>
<FONT color="green">704</FONT> il.append(new ICONST(0));<a name="line.704"></a>
<FONT color="green">705</FONT> il.append(new NEWARRAY(BasicType.INT));<a name="line.705"></a>
<FONT color="green">706</FONT> il.append(SWAP);<a name="line.706"></a>
<FONT color="green">707</FONT> il.append(new INVOKESPECIAL(index));<a name="line.707"></a>
<FONT color="green">708</FONT> }<a name="line.708"></a>
<FONT color="green">709</FONT> else {<a name="line.709"></a>
<FONT color="green">710</FONT> // Push name arrays on the stack<a name="line.710"></a>
<FONT color="green">711</FONT> il.append(ALOAD_0);<a name="line.711"></a>
<FONT color="green">712</FONT> il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS,<a name="line.712"></a>
<FONT color="green">713</FONT> NAMES_INDEX,<a name="line.713"></a>
<FONT color="green">714</FONT> NAMES_INDEX_SIG))); <a name="line.714"></a>
<FONT color="green">715</FONT> il.append(ALOAD_0);<a name="line.715"></a>
<FONT color="green">716</FONT> il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS,<a name="line.716"></a>
<FONT color="green">717</FONT> URIS_INDEX,<a name="line.717"></a>
<FONT color="green">718</FONT> URIS_INDEX_SIG))); <a name="line.718"></a>
<FONT color="green">719</FONT> il.append(ALOAD_0);<a name="line.719"></a>
<FONT color="green">720</FONT> il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS,<a name="line.720"></a>
<FONT color="green">721</FONT> TYPES_INDEX,<a name="line.721"></a>
<FONT color="green">722</FONT> TYPES_INDEX_SIG))); <a name="line.722"></a>
<FONT color="green">723</FONT> il.append(ALOAD_0);<a name="line.723"></a>
<FONT color="green">724</FONT> il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS,<a name="line.724"></a>
<FONT color="green">725</FONT> NAMESPACE_INDEX,<a name="line.725"></a>
<FONT color="green">726</FONT> NAMESPACE_INDEX_SIG)));<a name="line.726"></a>
<FONT color="green">727</FONT> <a name="line.727"></a>
<FONT color="green">728</FONT> // Initialized DOM adapter<a name="line.728"></a>
<FONT color="green">729</FONT> il.append(new INVOKESPECIAL(index));<a name="line.729"></a>
<FONT color="green">730</FONT> <a name="line.730"></a>
<FONT color="green">731</FONT> // Add DOM adapter to MultiDOM class by calling addDOMAdapter()<a name="line.731"></a>
<FONT color="green">732</FONT> il.append(DUP);<a name="line.732"></a>
<FONT color="green">733</FONT> il.append(methodGen.loadDOM());<a name="line.733"></a>
<FONT color="green">734</FONT> il.append(new CHECKCAST(cpg.addClass(classGen.getDOMClass())));<a name="line.734"></a>
<FONT color="green">735</FONT> il.append(SWAP);<a name="line.735"></a>
<FONT color="green">736</FONT> index = cpg.addMethodref(MULTI_DOM_CLASS,<a name="line.736"></a>
<FONT color="green">737</FONT> "addDOMAdapter",<a name="line.737"></a>
<FONT color="green">738</FONT> "(" + DOM_ADAPTER_SIG + ")I");<a name="line.738"></a>
<FONT color="green">739</FONT> il.append(new INVOKEVIRTUAL(index));<a name="line.739"></a>
<FONT color="green">740</FONT> il.append(POP); // ignore mask returned by addDOMAdapter<a name="line.740"></a>
<FONT color="green">741</FONT> }<a name="line.741"></a>
<FONT color="green">742</FONT> }<a name="line.742"></a>
<FONT color="green">743</FONT> <a name="line.743"></a>
<FONT color="green">744</FONT> // Restore old handler base from stack<a name="line.744"></a>
<FONT color="green">745</FONT> il.append(SWAP);<a name="line.745"></a>
<FONT color="green">746</FONT> il.append(methodGen.storeHandler());<a name="line.746"></a>
<FONT color="green">747</FONT> }<a name="line.747"></a>
<FONT color="green">748</FONT> <a name="line.748"></a>
<FONT color="green">749</FONT> /**<a name="line.749"></a>
<FONT color="green">750</FONT> * Retrieve an ID to identify the namespaces in scope at this point in the<a name="line.750"></a>
<FONT color="green">751</FONT> * stylesheet<a name="line.751"></a>
<FONT color="green">752</FONT> * @return An &lt;code&gt;int&lt;/code&gt; representing the node ID or &lt;code&gt;-1&lt;/code&gt;<a name="line.752"></a>
<FONT color="green">753</FONT> * if no namespace declarations are in scope<a name="line.753"></a>
<FONT color="green">754</FONT> */<a name="line.754"></a>
<FONT color="green">755</FONT> protected final int getNodeIDForStylesheetNSLookup() {<a name="line.755"></a>
<FONT color="green">756</FONT> if (_nodeIDForStylesheetNSLookup == UNKNOWN_STYLESHEET_NODE_ID) {<a name="line.756"></a>
<FONT color="green">757</FONT> Hashtable prefixMapping = getPrefixMapping();<a name="line.757"></a>
<FONT color="green">758</FONT> int parentNodeID =<a name="line.758"></a>
<FONT color="green">759</FONT> (_parent != null) ? _parent.getNodeIDForStylesheetNSLookup()<a name="line.759"></a>
<FONT color="green">760</FONT> : UNKNOWN_STYLESHEET_NODE_ID; <a name="line.760"></a>
<FONT color="green">761</FONT> <a name="line.761"></a>
<FONT color="green">762</FONT> // If this node in the stylesheet has no namespace declarations of<a name="line.762"></a>
<FONT color="green">763</FONT> // its own, use the ID of the nearest ancestor element that does <a name="line.763"></a>
<FONT color="green">764</FONT> // have namespace declarations.<a name="line.764"></a>
<FONT color="green">765</FONT> if (prefixMapping == null) {<a name="line.765"></a>
<FONT color="green">766</FONT> _nodeIDForStylesheetNSLookup = parentNodeID;<a name="line.766"></a>
<FONT color="green">767</FONT> } else {<a name="line.767"></a>
<FONT color="green">768</FONT> // Inform the XSLTC object that we'll need to know about this<a name="line.768"></a>
<FONT color="green">769</FONT> // node's namespace declarations.<a name="line.769"></a>
<FONT color="green">770</FONT> _nodeIDForStylesheetNSLookup =<a name="line.770"></a>
<FONT color="green">771</FONT> getXSLTC().registerStylesheetPrefixMappingForRuntime(<a name="line.771"></a>
<FONT color="green">772</FONT> prefixMapping, parentNodeID);<a name="line.772"></a>
<FONT color="green">773</FONT> }<a name="line.773"></a>
<FONT color="green">774</FONT> }<a name="line.774"></a>
<FONT color="green">775</FONT> <a name="line.775"></a>
<FONT color="green">776</FONT> return _nodeIDForStylesheetNSLookup;<a name="line.776"></a>
<FONT color="green">777</FONT> }<a name="line.777"></a>
<FONT color="green">778</FONT> /**<a name="line.778"></a>
<FONT color="green">779</FONT> * Returns true if this expression/instruction depends on the context. By <a name="line.779"></a>
<FONT color="green">780</FONT> * default, every expression/instruction depends on the context unless it <a name="line.780"></a>
<FONT color="green">781</FONT> * overrides this method. Currently used to determine if result trees are <a name="line.781"></a>
<FONT color="green">782</FONT> * compiled using procedures or little DOMs (result tree fragments).<a name="line.782"></a>
<FONT color="green">783</FONT> * @return 'true' if this node depends on the context.<a name="line.783"></a>
<FONT color="green">784</FONT> */<a name="line.784"></a>
<FONT color="green">785</FONT> protected boolean contextDependent() {<a name="line.785"></a>
<FONT color="green">786</FONT> return true;<a name="line.786"></a>
<FONT color="green">787</FONT> }<a name="line.787"></a>
<FONT color="green">788</FONT> <a name="line.788"></a>
<FONT color="green">789</FONT> /**<a name="line.789"></a>
<FONT color="green">790</FONT> * Return true if any of the expressions/instructions in the contents of<a name="line.790"></a>
<FONT color="green">791</FONT> * this node is context dependent.<a name="line.791"></a>
<FONT color="green">792</FONT> * @return 'true' if the contents of this node is context dependent.<a name="line.792"></a>
<FONT color="green">793</FONT> */<a name="line.793"></a>
<FONT color="green">794</FONT> protected boolean dependentContents() {<a name="line.794"></a>
<FONT color="green">795</FONT> final int n = elementCount();<a name="line.795"></a>
<FONT color="green">796</FONT> for (int i = 0; i &lt; n; i++) {<a name="line.796"></a>
<FONT color="green">797</FONT> final SyntaxTreeNode item = (SyntaxTreeNode)_contents.elementAt(i);<a name="line.797"></a>
<FONT color="green">798</FONT> if (item.contextDependent()) {<a name="line.798"></a>
<FONT color="green">799</FONT> return true;<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> return false;<a name="line.802"></a>
<FONT color="green">803</FONT> }<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> * Adds a child node to this syntax tree node.<a name="line.806"></a>
<FONT color="green">807</FONT> * @param element is the new child node.<a name="line.807"></a>
<FONT color="green">808</FONT> */<a name="line.808"></a>
<FONT color="green">809</FONT> protected final void addElement(SyntaxTreeNode element) {<a name="line.809"></a>
<FONT color="green">810</FONT> _contents.addElement(element);<a name="line.810"></a>
<FONT color="green">811</FONT> element.setParent(this);<a name="line.811"></a>
<FONT color="green">812</FONT> }<a name="line.812"></a>
<FONT color="green">813</FONT> <a name="line.813"></a>
<FONT color="green">814</FONT> /**<a name="line.814"></a>
<FONT color="green">815</FONT> * Inserts the first child node of this syntax tree node. The existing<a name="line.815"></a>
<FONT color="green">816</FONT> * children are shifted back one position.<a name="line.816"></a>
<FONT color="green">817</FONT> * @param element is the new child node.<a name="line.817"></a>
<FONT color="green">818</FONT> */<a name="line.818"></a>
<FONT color="green">819</FONT> protected final void setFirstElement(SyntaxTreeNode element) {<a name="line.819"></a>
<FONT color="green">820</FONT> _contents.insertElementAt(element,0);<a name="line.820"></a>
<FONT color="green">821</FONT> element.setParent(this);<a name="line.821"></a>
<FONT color="green">822</FONT> }<a name="line.822"></a>
<FONT color="green">823</FONT> <a name="line.823"></a>
<FONT color="green">824</FONT> /**<a name="line.824"></a>
<FONT color="green">825</FONT> * Removed a child node of this syntax tree node.<a name="line.825"></a>
<FONT color="green">826</FONT> * @param element is the child node to remove.<a name="line.826"></a>
<FONT color="green">827</FONT> */<a name="line.827"></a>
<FONT color="green">828</FONT> protected final void removeElement(SyntaxTreeNode element) {<a name="line.828"></a>
<FONT color="green">829</FONT> _contents.remove(element);<a name="line.829"></a>
<FONT color="green">830</FONT> element.setParent(null);<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> /**<a name="line.833"></a>
<FONT color="green">834</FONT> * Returns a Vector containing all the child nodes of this node.<a name="line.834"></a>
<FONT color="green">835</FONT> * @return A Vector containing all the child nodes of this node.<a name="line.835"></a>
<FONT color="green">836</FONT> */<a name="line.836"></a>
<FONT color="green">837</FONT> protected final Vector getContents() {<a name="line.837"></a>
<FONT color="green">838</FONT> return _contents;<a name="line.838"></a>
<FONT color="green">839</FONT> }<a name="line.839"></a>
<FONT color="green">840</FONT> <a name="line.840"></a>
<FONT color="green">841</FONT> /**<a name="line.841"></a>
<FONT color="green">842</FONT> * Tells you if this node has any child nodes.<a name="line.842"></a>
<FONT color="green">843</FONT> * @return 'true' if this node has any children.<a name="line.843"></a>
<FONT color="green">844</FONT> */<a name="line.844"></a>
<FONT color="green">845</FONT> protected final boolean hasContents() {<a name="line.845"></a>
<FONT color="green">846</FONT> return elementCount() &gt; 0;<a name="line.846"></a>
<FONT color="green">847</FONT> }<a name="line.847"></a>
<FONT color="green">848</FONT> <a name="line.848"></a>
<FONT color="green">849</FONT> /**<a name="line.849"></a>
<FONT color="green">850</FONT> * Returns the number of children this node has.<a name="line.850"></a>
<FONT color="green">851</FONT> * @return Number of child nodes.<a name="line.851"></a>
<FONT color="green">852</FONT> */<a name="line.852"></a>
<FONT color="green">853</FONT> protected final int elementCount() {<a name="line.853"></a>
<FONT color="green">854</FONT> return _contents.size();<a name="line.854"></a>
<FONT color="green">855</FONT> }<a name="line.855"></a>
<FONT color="green">856</FONT> <a name="line.856"></a>
<FONT color="green">857</FONT> /**<a name="line.857"></a>
<FONT color="green">858</FONT> * Returns an Enumeration of all child nodes of this node.<a name="line.858"></a>
<FONT color="green">859</FONT> * @return An Enumeration of all child nodes of this node.<a name="line.859"></a>
<FONT color="green">860</FONT> */<a name="line.860"></a>
<FONT color="green">861</FONT> protected final Enumeration elements() {<a name="line.861"></a>
<FONT color="green">862</FONT> return _contents.elements();<a name="line.862"></a>
<FONT color="green">863</FONT> }<a name="line.863"></a>
<FONT color="green">864</FONT> <a name="line.864"></a>
<FONT color="green">865</FONT> /**<a name="line.865"></a>
<FONT color="green">866</FONT> * Returns a child node at a given position.<a name="line.866"></a>
<FONT color="green">867</FONT> * @param pos The child node's position.<a name="line.867"></a>
<FONT color="green">868</FONT> * @return The child node.<a name="line.868"></a>
<FONT color="green">869</FONT> */<a name="line.869"></a>
<FONT color="green">870</FONT> protected final Object elementAt(int pos) {<a name="line.870"></a>
<FONT color="green">871</FONT> return _contents.elementAt(pos);<a name="line.871"></a>
<FONT color="green">872</FONT> }<a name="line.872"></a>
<FONT color="green">873</FONT> <a name="line.873"></a>
<FONT color="green">874</FONT> /**<a name="line.874"></a>
<FONT color="green">875</FONT> * Returns this element's last child<a name="line.875"></a>
<FONT color="green">876</FONT> * @return The child node.<a name="line.876"></a>
<FONT color="green">877</FONT> */<a name="line.877"></a>
<FONT color="green">878</FONT> protected final SyntaxTreeNode lastChild() {<a name="line.878"></a>
<FONT color="green">879</FONT> if (_contents.size() == 0) return null;<a name="line.879"></a>
<FONT color="green">880</FONT> return (SyntaxTreeNode)_contents.lastElement();<a name="line.880"></a>
<FONT color="green">881</FONT> }<a name="line.881"></a>
<FONT color="green">882</FONT> <a name="line.882"></a>
<FONT color="green">883</FONT> /**<a name="line.883"></a>
<FONT color="green">884</FONT> * Displays the contents of this syntax tree node (to stdout).<a name="line.884"></a>
<FONT color="green">885</FONT> * This method is intended for debugging _only_, and should be overridden<a name="line.885"></a>
<FONT color="green">886</FONT> * by all syntax tree node implementations.<a name="line.886"></a>
<FONT color="green">887</FONT> * @param indent Indentation level for syntax tree levels.<a name="line.887"></a>
<FONT color="green">888</FONT> */<a name="line.888"></a>
<FONT color="green">889</FONT> public void display(int indent) {<a name="line.889"></a>
<FONT color="green">890</FONT> displayContents(indent);<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> /**<a name="line.893"></a>
<FONT color="green">894</FONT> * Displays the contents of this syntax tree node (to stdout).<a name="line.894"></a>
<FONT color="green">895</FONT> * This method is intended for debugging _only_ !!!<a name="line.895"></a>
<FONT color="green">896</FONT> * @param indent Indentation level for syntax tree levels.<a name="line.896"></a>
<FONT color="green">897</FONT> */<a name="line.897"></a>
<FONT color="green">898</FONT> protected void displayContents(int indent) {<a name="line.898"></a>
<FONT color="green">899</FONT> final int n = elementCount();<a name="line.899"></a>
<FONT color="green">900</FONT> for (int i = 0; i &lt; n; i++) {<a name="line.900"></a>
<FONT color="green">901</FONT> SyntaxTreeNode item = (SyntaxTreeNode)_contents.elementAt(i);<a name="line.901"></a>
<FONT color="green">902</FONT> item.display(indent);<a name="line.902"></a>
<FONT color="green">903</FONT> }<a name="line.903"></a>
<FONT color="green">904</FONT> }<a name="line.904"></a>
<FONT color="green">905</FONT> <a name="line.905"></a>
<FONT color="green">906</FONT> /**<a name="line.906"></a>
<FONT color="green">907</FONT> * Set the indentation level for debug output.<a name="line.907"></a>
<FONT color="green">908</FONT> * @param indent Indentation level for syntax tree levels.<a name="line.908"></a>
<FONT color="green">909</FONT> */<a name="line.909"></a>
<FONT color="green">910</FONT> protected final void indent(int indent) {<a name="line.910"></a>
<FONT color="green">911</FONT> System.out.print(new String(_spaces, 0, indent));<a name="line.911"></a>
<FONT color="green">912</FONT> }<a name="line.912"></a>
<FONT color="green">913</FONT> <a name="line.913"></a>
<FONT color="green">914</FONT> /**<a name="line.914"></a>
<FONT color="green">915</FONT> * Report an error to the parser.<a name="line.915"></a>
<FONT color="green">916</FONT> * @param element The element in which the error occured (normally 'this'<a name="line.916"></a>
<FONT color="green">917</FONT> * but it could also be an expression/pattern/etc.)<a name="line.917"></a>
<FONT color="green">918</FONT> * @param parser The XSLT parser to report the error to.<a name="line.918"></a>
<FONT color="green">919</FONT> * @param error The error code (from util/ErrorMsg).<a name="line.919"></a>
<FONT color="green">920</FONT> * @param message Any additional error message.<a name="line.920"></a>
<FONT color="green">921</FONT> */<a name="line.921"></a>
<FONT color="green">922</FONT> protected void reportError(SyntaxTreeNode element, Parser parser,<a name="line.922"></a>
<FONT color="green">923</FONT> String errorCode, String message) {<a name="line.923"></a>
<FONT color="green">924</FONT> final ErrorMsg error = new ErrorMsg(errorCode, message, element);<a name="line.924"></a>
<FONT color="green">925</FONT> parser.reportError(Constants.ERROR, error);<a name="line.925"></a>
<FONT color="green">926</FONT> }<a name="line.926"></a>
<FONT color="green">927</FONT> <a name="line.927"></a>
<FONT color="green">928</FONT> /**<a name="line.928"></a>
<FONT color="green">929</FONT> * Report a recoverable error to the parser.<a name="line.929"></a>
<FONT color="green">930</FONT> * @param element The element in which the error occured (normally 'this'<a name="line.930"></a>
<FONT color="green">931</FONT> * but it could also be an expression/pattern/etc.)<a name="line.931"></a>
<FONT color="green">932</FONT> * @param parser The XSLT parser to report the error to.<a name="line.932"></a>
<FONT color="green">933</FONT> * @param error The error code (from util/ErrorMsg).<a name="line.933"></a>
<FONT color="green">934</FONT> * @param message Any additional error message.<a name="line.934"></a>
<FONT color="green">935</FONT> */<a name="line.935"></a>
<FONT color="green">936</FONT> protected void reportWarning(SyntaxTreeNode element, Parser parser,<a name="line.936"></a>
<FONT color="green">937</FONT> String errorCode, String message) {<a name="line.937"></a>
<FONT color="green">938</FONT> final ErrorMsg error = new ErrorMsg(errorCode, message, element);<a name="line.938"></a>
<FONT color="green">939</FONT> parser.reportError(Constants.WARNING, error);<a name="line.939"></a>
<FONT color="green">940</FONT> }<a name="line.940"></a>
<FONT color="green">941</FONT> <a name="line.941"></a>
<FONT color="green">942</FONT> }<a name="line.942"></a>
</PRE>
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