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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: NodeSequence.java 469367 2006-10-31 04:41:08Z 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 java.util.Vector;<a name="line.23"></a> |
| <FONT color="green">024</FONT> <a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.xml.dtm.DTM;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import org.apache.xml.dtm.DTMFilter;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xml.dtm.DTMIterator;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xml.dtm.DTMManager;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.xml.utils.NodeVector;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xpath.NodeSetDTM;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import org.apache.xpath.XPathContext;<a name="line.31"></a> |
| <FONT color="green">032</FONT> import org.apache.xpath.objects.XObject;<a name="line.32"></a> |
| <FONT color="green">033</FONT> <a name="line.33"></a> |
| <FONT color="green">034</FONT> /**<a name="line.34"></a> |
| <FONT color="green">035</FONT> * This class is the dynamic wrapper for a Xalan DTMIterator instance, and <a name="line.35"></a> |
| <FONT color="green">036</FONT> * provides random access capabilities.<a name="line.36"></a> |
| <FONT color="green">037</FONT> */<a name="line.37"></a> |
| <FONT color="green">038</FONT> public class NodeSequence extends XObject<a name="line.38"></a> |
| <FONT color="green">039</FONT> implements DTMIterator, Cloneable, PathComponent<a name="line.39"></a> |
| <FONT color="green">040</FONT> {<a name="line.40"></a> |
| <FONT color="green">041</FONT> static final long serialVersionUID = 3866261934726581044L;<a name="line.41"></a> |
| <FONT color="green">042</FONT> /** The index of the last node in the iteration. */<a name="line.42"></a> |
| <FONT color="green">043</FONT> protected int m_last = -1;<a name="line.43"></a> |
| <FONT color="green">044</FONT> <a name="line.44"></a> |
| <FONT color="green">045</FONT> /**<a name="line.45"></a> |
| <FONT color="green">046</FONT> * The index of the next node to be fetched. Useful if this<a name="line.46"></a> |
| <FONT color="green">047</FONT> * is a cached iterator, and is being used as random access<a name="line.47"></a> |
| <FONT color="green">048</FONT> * NodeList.<a name="line.48"></a> |
| <FONT color="green">049</FONT> */<a name="line.49"></a> |
| <FONT color="green">050</FONT> protected int m_next = 0;<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 cache of a list of nodes obtained from the iterator so far.<a name="line.53"></a> |
| <FONT color="green">054</FONT> * This list is appended to until the iterator is exhausted and<a name="line.54"></a> |
| <FONT color="green">055</FONT> * the cache is complete.<a name="line.55"></a> |
| <FONT color="green">056</FONT> * <p><a name="line.56"></a> |
| <FONT color="green">057</FONT> * Multiple NodeSequence objects may share the same cache.<a name="line.57"></a> |
| <FONT color="green">058</FONT> */<a name="line.58"></a> |
| <FONT color="green">059</FONT> private IteratorCache m_cache;<a name="line.59"></a> |
| <FONT color="green">060</FONT> <a name="line.60"></a> |
| <FONT color="green">061</FONT> /**<a name="line.61"></a> |
| <FONT color="green">062</FONT> * If this iterator needs to cache nodes that are fetched, they<a name="line.62"></a> |
| <FONT color="green">063</FONT> * are stored in the Vector in the generic object.<a name="line.63"></a> |
| <FONT color="green">064</FONT> */<a name="line.64"></a> |
| <FONT color="green">065</FONT> protected NodeVector getVector() {<a name="line.65"></a> |
| <FONT color="green">066</FONT> NodeVector nv = (m_cache != null) ? m_cache.getVector() : null;<a name="line.66"></a> |
| <FONT color="green">067</FONT> return nv;<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> /**<a name="line.70"></a> |
| <FONT color="green">071</FONT> * Get the cache (if any) of nodes obtained from<a name="line.71"></a> |
| <FONT color="green">072</FONT> * the iterator so far. Note that the cache keeps<a name="line.72"></a> |
| <FONT color="green">073</FONT> * growing until the iterator is walked to exhaustion,<a name="line.73"></a> |
| <FONT color="green">074</FONT> * at which point the cache is "complete".<a name="line.74"></a> |
| <FONT color="green">075</FONT> */<a name="line.75"></a> |
| <FONT color="green">076</FONT> private IteratorCache getCache() {<a name="line.76"></a> |
| <FONT color="green">077</FONT> return m_cache;<a name="line.77"></a> |
| <FONT color="green">078</FONT> }<a name="line.78"></a> |
| <FONT color="green">079</FONT> <a name="line.79"></a> |
| <FONT color="green">080</FONT> /**<a name="line.80"></a> |
| <FONT color="green">081</FONT> * Set the vector where nodes will be cached.<a name="line.81"></a> |
| <FONT color="green">082</FONT> */<a name="line.82"></a> |
| <FONT color="green">083</FONT> protected void SetVector(NodeVector v)<a name="line.83"></a> |
| <FONT color="green">084</FONT> {<a name="line.84"></a> |
| <FONT color="green">085</FONT> setObject(v);<a name="line.85"></a> |
| <FONT color="green">086</FONT> }<a name="line.86"></a> |
| <FONT color="green">087</FONT> <a name="line.87"></a> |
| <FONT color="green">088</FONT> <a name="line.88"></a> |
| <FONT color="green">089</FONT> /**<a name="line.89"></a> |
| <FONT color="green">090</FONT> * If the iterator needs to cache nodes as they are fetched,<a name="line.90"></a> |
| <FONT color="green">091</FONT> * then this method returns true. <a name="line.91"></a> |
| <FONT color="green">092</FONT> */<a name="line.92"></a> |
| <FONT color="green">093</FONT> public boolean hasCache()<a name="line.93"></a> |
| <FONT color="green">094</FONT> {<a name="line.94"></a> |
| <FONT color="green">095</FONT> final NodeVector nv = getVector();<a name="line.95"></a> |
| <FONT color="green">096</FONT> return (nv != null);<a name="line.96"></a> |
| <FONT color="green">097</FONT> }<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> * If this NodeSequence has a cache, and that cache is <a name="line.100"></a> |
| <FONT color="green">101</FONT> * fully populated then this method returns true, otherwise<a name="line.101"></a> |
| <FONT color="green">102</FONT> * if there is no cache or it is not complete it returns false.<a name="line.102"></a> |
| <FONT color="green">103</FONT> */<a name="line.103"></a> |
| <FONT color="green">104</FONT> private boolean cacheComplete() {<a name="line.104"></a> |
| <FONT color="green">105</FONT> final boolean complete;<a name="line.105"></a> |
| <FONT color="green">106</FONT> if (m_cache != null) {<a name="line.106"></a> |
| <FONT color="green">107</FONT> complete = m_cache.isComplete();<a name="line.107"></a> |
| <FONT color="green">108</FONT> } else {<a name="line.108"></a> |
| <FONT color="green">109</FONT> complete = false;<a name="line.109"></a> |
| <FONT color="green">110</FONT> }<a name="line.110"></a> |
| <FONT color="green">111</FONT> return complete;<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> /**<a name="line.114"></a> |
| <FONT color="green">115</FONT> * If this NodeSequence has a cache, mark that it is complete.<a name="line.115"></a> |
| <FONT color="green">116</FONT> * This method should be called after the iterator is exhausted.<a name="line.116"></a> |
| <FONT color="green">117</FONT> */<a name="line.117"></a> |
| <FONT color="green">118</FONT> private void markCacheComplete() {<a name="line.118"></a> |
| <FONT color="green">119</FONT> NodeVector nv = getVector();<a name="line.119"></a> |
| <FONT color="green">120</FONT> if (nv != null) {<a name="line.120"></a> |
| <FONT color="green">121</FONT> m_cache.setCacheComplete(true);<a name="line.121"></a> |
| <FONT color="green">122</FONT> } <a name="line.122"></a> |
| <FONT color="green">123</FONT> }<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> * The functional iterator that fetches nodes.<a name="line.127"></a> |
| <FONT color="green">128</FONT> */<a name="line.128"></a> |
| <FONT color="green">129</FONT> protected DTMIterator m_iter;<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> * Set the functional iterator that fetches nodes.<a name="line.132"></a> |
| <FONT color="green">133</FONT> * @param iter The iterator that is to be contained.<a name="line.133"></a> |
| <FONT color="green">134</FONT> */<a name="line.134"></a> |
| <FONT color="green">135</FONT> public final void setIter(DTMIterator iter)<a name="line.135"></a> |
| <FONT color="green">136</FONT> {<a name="line.136"></a> |
| <FONT color="green">137</FONT> m_iter = iter;<a name="line.137"></a> |
| <FONT color="green">138</FONT> }<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> * Get the functional iterator that fetches nodes.<a name="line.141"></a> |
| <FONT color="green">142</FONT> * @return The contained iterator.<a name="line.142"></a> |
| <FONT color="green">143</FONT> */<a name="line.143"></a> |
| <FONT color="green">144</FONT> public final DTMIterator getContainedIter()<a name="line.144"></a> |
| <FONT color="green">145</FONT> {<a name="line.145"></a> |
| <FONT color="green">146</FONT> return m_iter;<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> * The DTMManager to use if we're using a NodeVector only.<a name="line.150"></a> |
| <FONT color="green">151</FONT> * We may well want to do away with this, and store it in the NodeVector.<a name="line.151"></a> |
| <FONT color="green">152</FONT> */<a name="line.152"></a> |
| <FONT color="green">153</FONT> protected DTMManager m_dtmMgr;<a name="line.153"></a> |
| <FONT color="green">154</FONT> <a name="line.154"></a> |
| <FONT color="green">155</FONT> // ==== Constructors ====<a name="line.155"></a> |
| <FONT color="green">156</FONT> <a name="line.156"></a> |
| <FONT color="green">157</FONT> /**<a name="line.157"></a> |
| <FONT color="green">158</FONT> * Create a new NodeSequence from a (already cloned) iterator.<a name="line.158"></a> |
| <FONT color="green">159</FONT> * <a name="line.159"></a> |
| <FONT color="green">160</FONT> * @param iter Cloned (not static) DTMIterator.<a name="line.160"></a> |
| <FONT color="green">161</FONT> * @param context The initial context node.<a name="line.161"></a> |
| <FONT color="green">162</FONT> * @param xctxt The execution context.<a name="line.162"></a> |
| <FONT color="green">163</FONT> * @param shouldCacheNodes True if this sequence can random access.<a name="line.163"></a> |
| <FONT color="green">164</FONT> */<a name="line.164"></a> |
| <FONT color="green">165</FONT> private NodeSequence(DTMIterator iter, int context, XPathContext xctxt, boolean shouldCacheNodes)<a name="line.165"></a> |
| <FONT color="green">166</FONT> {<a name="line.166"></a> |
| <FONT color="green">167</FONT> setIter(iter);<a name="line.167"></a> |
| <FONT color="green">168</FONT> setRoot(context, xctxt);<a name="line.168"></a> |
| <FONT color="green">169</FONT> setShouldCacheNodes(shouldCacheNodes);<a name="line.169"></a> |
| <FONT color="green">170</FONT> }<a name="line.170"></a> |
| <FONT color="green">171</FONT> <a name="line.171"></a> |
| <FONT color="green">172</FONT> /**<a name="line.172"></a> |
| <FONT color="green">173</FONT> * Create a new NodeSequence from a (already cloned) iterator.<a name="line.173"></a> |
| <FONT color="green">174</FONT> * <a name="line.174"></a> |
| <FONT color="green">175</FONT> * @param nodeVector<a name="line.175"></a> |
| <FONT color="green">176</FONT> */<a name="line.176"></a> |
| <FONT color="green">177</FONT> public NodeSequence(Object nodeVector)<a name="line.177"></a> |
| <FONT color="green">178</FONT> {<a name="line.178"></a> |
| <FONT color="green">179</FONT> super(nodeVector);<a name="line.179"></a> |
| <FONT color="green">180</FONT> if (nodeVector instanceof NodeVector) {<a name="line.180"></a> |
| <FONT color="green">181</FONT> SetVector((NodeVector) nodeVector);<a name="line.181"></a> |
| <FONT color="green">182</FONT> }<a name="line.182"></a> |
| <FONT color="green">183</FONT> if(null != nodeVector)<a name="line.183"></a> |
| <FONT color="green">184</FONT> {<a name="line.184"></a> |
| <FONT color="green">185</FONT> assertion(nodeVector instanceof NodeVector, <a name="line.185"></a> |
| <FONT color="green">186</FONT> "Must have a NodeVector as the object for NodeSequence!");<a name="line.186"></a> |
| <FONT color="green">187</FONT> if(nodeVector instanceof DTMIterator)<a name="line.187"></a> |
| <FONT color="green">188</FONT> {<a name="line.188"></a> |
| <FONT color="green">189</FONT> setIter((DTMIterator)nodeVector);<a name="line.189"></a> |
| <FONT color="green">190</FONT> m_last = ((DTMIterator)nodeVector).getLength();<a name="line.190"></a> |
| <FONT color="green">191</FONT> }<a name="line.191"></a> |
| <FONT color="green">192</FONT> <a name="line.192"></a> |
| <FONT color="green">193</FONT> }<a name="line.193"></a> |
| <FONT color="green">194</FONT> }<a name="line.194"></a> |
| <FONT color="green">195</FONT> <a name="line.195"></a> |
| <FONT color="green">196</FONT> /**<a name="line.196"></a> |
| <FONT color="green">197</FONT> * Construct an empty XNodeSet object. This is used to create a mutable <a name="line.197"></a> |
| <FONT color="green">198</FONT> * nodeset to which random nodes may be added.<a name="line.198"></a> |
| <FONT color="green">199</FONT> */<a name="line.199"></a> |
| <FONT color="green">200</FONT> private NodeSequence(DTMManager dtmMgr)<a name="line.200"></a> |
| <FONT color="green">201</FONT> {<a name="line.201"></a> |
| <FONT color="green">202</FONT> super(new NodeVector());<a name="line.202"></a> |
| <FONT color="green">203</FONT> m_last = 0;<a name="line.203"></a> |
| <FONT color="green">204</FONT> m_dtmMgr = dtmMgr;<a name="line.204"></a> |
| <FONT color="green">205</FONT> }<a name="line.205"></a> |
| <FONT color="green">206</FONT> <a name="line.206"></a> |
| <FONT color="green">207</FONT> <a name="line.207"></a> |
| <FONT color="green">208</FONT> /**<a name="line.208"></a> |
| <FONT color="green">209</FONT> * Create a new NodeSequence in an invalid (null) state.<a name="line.209"></a> |
| <FONT color="green">210</FONT> */<a name="line.210"></a> |
| <FONT color="green">211</FONT> public NodeSequence()<a name="line.211"></a> |
| <FONT color="green">212</FONT> {<a name="line.212"></a> |
| <FONT color="green">213</FONT> return;<a name="line.213"></a> |
| <FONT color="green">214</FONT> }<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> * @see DTMIterator#getDTM(int)<a name="line.218"></a> |
| <FONT color="green">219</FONT> */<a name="line.219"></a> |
| <FONT color="green">220</FONT> public DTM getDTM(int nodeHandle)<a name="line.220"></a> |
| <FONT color="green">221</FONT> {<a name="line.221"></a> |
| <FONT color="green">222</FONT> DTMManager mgr = getDTMManager();<a name="line.222"></a> |
| <FONT color="green">223</FONT> if(null != mgr)<a name="line.223"></a> |
| <FONT color="green">224</FONT> return getDTMManager().getDTM(nodeHandle);<a name="line.224"></a> |
| <FONT color="green">225</FONT> else<a name="line.225"></a> |
| <FONT color="green">226</FONT> {<a name="line.226"></a> |
| <FONT color="green">227</FONT> assertion(false, "Can not get a DTM Unless a DTMManager has been set!");<a name="line.227"></a> |
| <FONT color="green">228</FONT> return null;<a name="line.228"></a> |
| <FONT color="green">229</FONT> }<a name="line.229"></a> |
| <FONT color="green">230</FONT> }<a name="line.230"></a> |
| <FONT color="green">231</FONT> <a name="line.231"></a> |
| <FONT color="green">232</FONT> /**<a name="line.232"></a> |
| <FONT color="green">233</FONT> * @see DTMIterator#getDTMManager()<a name="line.233"></a> |
| <FONT color="green">234</FONT> */<a name="line.234"></a> |
| <FONT color="green">235</FONT> public DTMManager getDTMManager()<a name="line.235"></a> |
| <FONT color="green">236</FONT> {<a name="line.236"></a> |
| <FONT color="green">237</FONT> return m_dtmMgr;<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> * @see DTMIterator#getRoot()<a name="line.241"></a> |
| <FONT color="green">242</FONT> */<a name="line.242"></a> |
| <FONT color="green">243</FONT> public int getRoot()<a name="line.243"></a> |
| <FONT color="green">244</FONT> {<a name="line.244"></a> |
| <FONT color="green">245</FONT> if(null != m_iter)<a name="line.245"></a> |
| <FONT color="green">246</FONT> return m_iter.getRoot();<a name="line.246"></a> |
| <FONT color="green">247</FONT> else<a name="line.247"></a> |
| <FONT color="green">248</FONT> {<a name="line.248"></a> |
| <FONT color="green">249</FONT> // NodeSetDTM will call this, and so it's not a good thing to throw <a name="line.249"></a> |
| <FONT color="green">250</FONT> // an assertion here.<a name="line.250"></a> |
| <FONT color="green">251</FONT> // assertion(false, "Can not get the root from a non-iterated NodeSequence!");<a name="line.251"></a> |
| <FONT color="green">252</FONT> return DTM.NULL;<a name="line.252"></a> |
| <FONT color="green">253</FONT> }<a name="line.253"></a> |
| <FONT color="green">254</FONT> }<a name="line.254"></a> |
| <FONT color="green">255</FONT> <a name="line.255"></a> |
| <FONT color="green">256</FONT> /**<a name="line.256"></a> |
| <FONT color="green">257</FONT> * @see DTMIterator#setRoot(int, Object)<a name="line.257"></a> |
| <FONT color="green">258</FONT> */<a name="line.258"></a> |
| <FONT color="green">259</FONT> public void setRoot(int nodeHandle, Object environment)<a name="line.259"></a> |
| <FONT color="green">260</FONT> {<a name="line.260"></a> |
| <FONT color="green">261</FONT> if(null != m_iter)<a name="line.261"></a> |
| <FONT color="green">262</FONT> {<a name="line.262"></a> |
| <FONT color="green">263</FONT> XPathContext xctxt = (XPathContext)environment;<a name="line.263"></a> |
| <FONT color="green">264</FONT> m_dtmMgr = xctxt.getDTMManager();<a name="line.264"></a> |
| <FONT color="green">265</FONT> m_iter.setRoot(nodeHandle, environment);<a name="line.265"></a> |
| <FONT color="green">266</FONT> if(!m_iter.isDocOrdered())<a name="line.266"></a> |
| <FONT color="green">267</FONT> {<a name="line.267"></a> |
| <FONT color="green">268</FONT> if(!hasCache())<a name="line.268"></a> |
| <FONT color="green">269</FONT> setShouldCacheNodes(true);<a name="line.269"></a> |
| <FONT color="green">270</FONT> runTo(-1);<a name="line.270"></a> |
| <FONT color="green">271</FONT> m_next=0;<a name="line.271"></a> |
| <FONT color="green">272</FONT> }<a name="line.272"></a> |
| <FONT color="green">273</FONT> }<a name="line.273"></a> |
| <FONT color="green">274</FONT> else<a name="line.274"></a> |
| <FONT color="green">275</FONT> assertion(false, "Can not setRoot on a non-iterated NodeSequence!");<a name="line.275"></a> |
| <FONT color="green">276</FONT> }<a name="line.276"></a> |
| <FONT color="green">277</FONT> <a name="line.277"></a> |
| <FONT color="green">278</FONT> /**<a name="line.278"></a> |
| <FONT color="green">279</FONT> * @see DTMIterator#reset()<a name="line.279"></a> |
| <FONT color="green">280</FONT> */<a name="line.280"></a> |
| <FONT color="green">281</FONT> public void reset()<a name="line.281"></a> |
| <FONT color="green">282</FONT> {<a name="line.282"></a> |
| <FONT color="green">283</FONT> m_next = 0;<a name="line.283"></a> |
| <FONT color="green">284</FONT> // not resetting the iterator on purpose!!!<a name="line.284"></a> |
| <FONT color="green">285</FONT> }<a name="line.285"></a> |
| <FONT color="green">286</FONT> <a name="line.286"></a> |
| <FONT color="green">287</FONT> /**<a name="line.287"></a> |
| <FONT color="green">288</FONT> * @see DTMIterator#getWhatToShow()<a name="line.288"></a> |
| <FONT color="green">289</FONT> */<a name="line.289"></a> |
| <FONT color="green">290</FONT> public int getWhatToShow()<a name="line.290"></a> |
| <FONT color="green">291</FONT> {<a name="line.291"></a> |
| <FONT color="green">292</FONT> return hasCache() ? (DTMFilter.SHOW_ALL & ~DTMFilter.SHOW_ENTITY_REFERENCE) <a name="line.292"></a> |
| <FONT color="green">293</FONT> : m_iter.getWhatToShow();<a name="line.293"></a> |
| <FONT color="green">294</FONT> }<a name="line.294"></a> |
| <FONT color="green">295</FONT> <a name="line.295"></a> |
| <FONT color="green">296</FONT> /**<a name="line.296"></a> |
| <FONT color="green">297</FONT> * @see DTMIterator#getExpandEntityReferences()<a name="line.297"></a> |
| <FONT color="green">298</FONT> */<a name="line.298"></a> |
| <FONT color="green">299</FONT> public boolean getExpandEntityReferences()<a name="line.299"></a> |
| <FONT color="green">300</FONT> {<a name="line.300"></a> |
| <FONT color="green">301</FONT> if(null != m_iter)<a name="line.301"></a> |
| <FONT color="green">302</FONT> return m_iter.getExpandEntityReferences();<a name="line.302"></a> |
| <FONT color="green">303</FONT> else<a name="line.303"></a> |
| <FONT color="green">304</FONT> return true;<a name="line.304"></a> |
| <FONT color="green">305</FONT> }<a name="line.305"></a> |
| <FONT color="green">306</FONT> <a name="line.306"></a> |
| <FONT color="green">307</FONT> /**<a name="line.307"></a> |
| <FONT color="green">308</FONT> * @see DTMIterator#nextNode()<a name="line.308"></a> |
| <FONT color="green">309</FONT> */<a name="line.309"></a> |
| <FONT color="green">310</FONT> public int nextNode()<a name="line.310"></a> |
| <FONT color="green">311</FONT> {<a name="line.311"></a> |
| <FONT color="green">312</FONT> // If the cache is on, and the node has already been found, then <a name="line.312"></a> |
| <FONT color="green">313</FONT> // just return from the list.<a name="line.313"></a> |
| <FONT color="green">314</FONT> NodeVector vec = getVector();<a name="line.314"></a> |
| <FONT color="green">315</FONT> if (null != vec)<a name="line.315"></a> |
| <FONT color="green">316</FONT> { <a name="line.316"></a> |
| <FONT color="green">317</FONT> // There is a cache<a name="line.317"></a> |
| <FONT color="green">318</FONT> if(m_next < vec.size())<a name="line.318"></a> |
| <FONT color="green">319</FONT> {<a name="line.319"></a> |
| <FONT color="green">320</FONT> // The node is in the cache, so just return it.<a name="line.320"></a> |
| <FONT color="green">321</FONT> int next = vec.elementAt(m_next);<a name="line.321"></a> |
| <FONT color="green">322</FONT> m_next++;<a name="line.322"></a> |
| <FONT color="green">323</FONT> return next;<a name="line.323"></a> |
| <FONT color="green">324</FONT> }<a name="line.324"></a> |
| <FONT color="green">325</FONT> else if(cacheComplete() || (-1 != m_last) || (null == m_iter))<a name="line.325"></a> |
| <FONT color="green">326</FONT> {<a name="line.326"></a> |
| <FONT color="green">327</FONT> m_next++;<a name="line.327"></a> |
| <FONT color="green">328</FONT> return DTM.NULL;<a name="line.328"></a> |
| <FONT color="green">329</FONT> }<a name="line.329"></a> |
| <FONT color="green">330</FONT> }<a name="line.330"></a> |
| <FONT color="green">331</FONT> <a name="line.331"></a> |
| <FONT color="green">332</FONT> if (null == m_iter)<a name="line.332"></a> |
| <FONT color="green">333</FONT> return DTM.NULL;<a name="line.333"></a> |
| <FONT color="green">334</FONT> <a name="line.334"></a> |
| <FONT color="green">335</FONT> int next = m_iter.nextNode();<a name="line.335"></a> |
| <FONT color="green">336</FONT> if(DTM.NULL != next)<a name="line.336"></a> |
| <FONT color="green">337</FONT> {<a name="line.337"></a> |
| <FONT color="green">338</FONT> if(hasCache())<a name="line.338"></a> |
| <FONT color="green">339</FONT> {<a name="line.339"></a> |
| <FONT color="green">340</FONT> if(m_iter.isDocOrdered())<a name="line.340"></a> |
| <FONT color="green">341</FONT> {<a name="line.341"></a> |
| <FONT color="green">342</FONT> getVector().addElement(next);<a name="line.342"></a> |
| <FONT color="green">343</FONT> m_next++;<a name="line.343"></a> |
| <FONT color="green">344</FONT> }<a name="line.344"></a> |
| <FONT color="green">345</FONT> else<a name="line.345"></a> |
| <FONT color="green">346</FONT> {<a name="line.346"></a> |
| <FONT color="green">347</FONT> int insertIndex = addNodeInDocOrder(next);<a name="line.347"></a> |
| <FONT color="green">348</FONT> if(insertIndex >= 0)<a name="line.348"></a> |
| <FONT color="green">349</FONT> m_next++;<a name="line.349"></a> |
| <FONT color="green">350</FONT> }<a name="line.350"></a> |
| <FONT color="green">351</FONT> }<a name="line.351"></a> |
| <FONT color="green">352</FONT> else<a name="line.352"></a> |
| <FONT color="green">353</FONT> m_next++;<a name="line.353"></a> |
| <FONT color="green">354</FONT> }<a name="line.354"></a> |
| <FONT color="green">355</FONT> else<a name="line.355"></a> |
| <FONT color="green">356</FONT> {<a name="line.356"></a> |
| <FONT color="green">357</FONT> // We have exhausted the iterator, and if there is a cache<a name="line.357"></a> |
| <FONT color="green">358</FONT> // it must have all nodes in it by now, so let the cache<a name="line.358"></a> |
| <FONT color="green">359</FONT> // know that it is complete.<a name="line.359"></a> |
| <FONT color="green">360</FONT> markCacheComplete();<a name="line.360"></a> |
| <FONT color="green">361</FONT> <a name="line.361"></a> |
| <FONT color="green">362</FONT> m_last = m_next;<a name="line.362"></a> |
| <FONT color="green">363</FONT> m_next++;<a name="line.363"></a> |
| <FONT color="green">364</FONT> }<a name="line.364"></a> |
| <FONT color="green">365</FONT> <a name="line.365"></a> |
| <FONT color="green">366</FONT> return next;<a name="line.366"></a> |
| <FONT color="green">367</FONT> }<a name="line.367"></a> |
| <FONT color="green">368</FONT> <a name="line.368"></a> |
| <FONT color="green">369</FONT> /**<a name="line.369"></a> |
| <FONT color="green">370</FONT> * @see DTMIterator#previousNode()<a name="line.370"></a> |
| <FONT color="green">371</FONT> */<a name="line.371"></a> |
| <FONT color="green">372</FONT> public int previousNode()<a name="line.372"></a> |
| <FONT color="green">373</FONT> {<a name="line.373"></a> |
| <FONT color="green">374</FONT> if(hasCache())<a name="line.374"></a> |
| <FONT color="green">375</FONT> {<a name="line.375"></a> |
| <FONT color="green">376</FONT> if(m_next <= 0)<a name="line.376"></a> |
| <FONT color="green">377</FONT> return DTM.NULL;<a name="line.377"></a> |
| <FONT color="green">378</FONT> else<a name="line.378"></a> |
| <FONT color="green">379</FONT> {<a name="line.379"></a> |
| <FONT color="green">380</FONT> m_next--;<a name="line.380"></a> |
| <FONT color="green">381</FONT> return item(m_next);<a name="line.381"></a> |
| <FONT color="green">382</FONT> }<a name="line.382"></a> |
| <FONT color="green">383</FONT> }<a name="line.383"></a> |
| <FONT color="green">384</FONT> else<a name="line.384"></a> |
| <FONT color="green">385</FONT> {<a name="line.385"></a> |
| <FONT color="green">386</FONT> int n = m_iter.previousNode();<a name="line.386"></a> |
| <FONT color="green">387</FONT> m_next = m_iter.getCurrentPos();<a name="line.387"></a> |
| <FONT color="green">388</FONT> return m_next;<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> <a name="line.391"></a> |
| <FONT color="green">392</FONT> /**<a name="line.392"></a> |
| <FONT color="green">393</FONT> * @see DTMIterator#detach()<a name="line.393"></a> |
| <FONT color="green">394</FONT> */<a name="line.394"></a> |
| <FONT color="green">395</FONT> public void detach()<a name="line.395"></a> |
| <FONT color="green">396</FONT> {<a name="line.396"></a> |
| <FONT color="green">397</FONT> if(null != m_iter)<a name="line.397"></a> |
| <FONT color="green">398</FONT> m_iter.detach();<a name="line.398"></a> |
| <FONT color="green">399</FONT> super.detach();<a name="line.399"></a> |
| <FONT color="green">400</FONT> }<a name="line.400"></a> |
| <FONT color="green">401</FONT> <a name="line.401"></a> |
| <FONT color="green">402</FONT> /**<a name="line.402"></a> |
| <FONT color="green">403</FONT> * Calling this with a value of false will cause the nodeset <a name="line.403"></a> |
| <FONT color="green">404</FONT> * to be cached.<a name="line.404"></a> |
| <FONT color="green">405</FONT> * @see DTMIterator#allowDetachToRelease(boolean)<a name="line.405"></a> |
| <FONT color="green">406</FONT> */<a name="line.406"></a> |
| <FONT color="green">407</FONT> public void allowDetachToRelease(boolean allowRelease)<a name="line.407"></a> |
| <FONT color="green">408</FONT> {<a name="line.408"></a> |
| <FONT color="green">409</FONT> if((false == allowRelease) && !hasCache())<a name="line.409"></a> |
| <FONT color="green">410</FONT> {<a name="line.410"></a> |
| <FONT color="green">411</FONT> setShouldCacheNodes(true);<a name="line.411"></a> |
| <FONT color="green">412</FONT> }<a name="line.412"></a> |
| <FONT color="green">413</FONT> <a name="line.413"></a> |
| <FONT color="green">414</FONT> if(null != m_iter)<a name="line.414"></a> |
| <FONT color="green">415</FONT> m_iter.allowDetachToRelease(allowRelease);<a name="line.415"></a> |
| <FONT color="green">416</FONT> super.allowDetachToRelease(allowRelease);<a name="line.416"></a> |
| <FONT color="green">417</FONT> }<a name="line.417"></a> |
| <FONT color="green">418</FONT> <a name="line.418"></a> |
| <FONT color="green">419</FONT> /**<a name="line.419"></a> |
| <FONT color="green">420</FONT> * @see DTMIterator#getCurrentNode()<a name="line.420"></a> |
| <FONT color="green">421</FONT> */<a name="line.421"></a> |
| <FONT color="green">422</FONT> public int getCurrentNode()<a name="line.422"></a> |
| <FONT color="green">423</FONT> {<a name="line.423"></a> |
| <FONT color="green">424</FONT> if(hasCache())<a name="line.424"></a> |
| <FONT color="green">425</FONT> {<a name="line.425"></a> |
| <FONT color="green">426</FONT> int currentIndex = m_next-1;<a name="line.426"></a> |
| <FONT color="green">427</FONT> NodeVector vec = getVector();<a name="line.427"></a> |
| <FONT color="green">428</FONT> if((currentIndex >= 0) && (currentIndex < vec.size()))<a name="line.428"></a> |
| <FONT color="green">429</FONT> return vec.elementAt(currentIndex);<a name="line.429"></a> |
| <FONT color="green">430</FONT> else<a name="line.430"></a> |
| <FONT color="green">431</FONT> return DTM.NULL;<a name="line.431"></a> |
| <FONT color="green">432</FONT> }<a name="line.432"></a> |
| <FONT color="green">433</FONT> <a name="line.433"></a> |
| <FONT color="green">434</FONT> if(null != m_iter)<a name="line.434"></a> |
| <FONT color="green">435</FONT> {<a name="line.435"></a> |
| <FONT color="green">436</FONT> return m_iter.getCurrentNode();<a name="line.436"></a> |
| <FONT color="green">437</FONT> }<a name="line.437"></a> |
| <FONT color="green">438</FONT> else<a name="line.438"></a> |
| <FONT color="green">439</FONT> return DTM.NULL;<a name="line.439"></a> |
| <FONT color="green">440</FONT> }<a name="line.440"></a> |
| <FONT color="green">441</FONT> <a name="line.441"></a> |
| <FONT color="green">442</FONT> /**<a name="line.442"></a> |
| <FONT color="green">443</FONT> * @see DTMIterator#isFresh()<a name="line.443"></a> |
| <FONT color="green">444</FONT> */<a name="line.444"></a> |
| <FONT color="green">445</FONT> public boolean isFresh()<a name="line.445"></a> |
| <FONT color="green">446</FONT> {<a name="line.446"></a> |
| <FONT color="green">447</FONT> return (0 == m_next);<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> * @see DTMIterator#setShouldCacheNodes(boolean)<a name="line.451"></a> |
| <FONT color="green">452</FONT> */<a name="line.452"></a> |
| <FONT color="green">453</FONT> public void setShouldCacheNodes(boolean b)<a name="line.453"></a> |
| <FONT color="green">454</FONT> {<a name="line.454"></a> |
| <FONT color="green">455</FONT> if (b)<a name="line.455"></a> |
| <FONT color="green">456</FONT> {<a name="line.456"></a> |
| <FONT color="green">457</FONT> if(!hasCache())<a name="line.457"></a> |
| <FONT color="green">458</FONT> {<a name="line.458"></a> |
| <FONT color="green">459</FONT> SetVector(new NodeVector());<a name="line.459"></a> |
| <FONT color="green">460</FONT> }<a name="line.460"></a> |
| <FONT color="green">461</FONT> // else<a name="line.461"></a> |
| <FONT color="green">462</FONT> // getVector().RemoveAllNoClear(); // Is this good?<a name="line.462"></a> |
| <FONT color="green">463</FONT> }<a name="line.463"></a> |
| <FONT color="green">464</FONT> else<a name="line.464"></a> |
| <FONT color="green">465</FONT> SetVector(null);<a name="line.465"></a> |
| <FONT color="green">466</FONT> }<a name="line.466"></a> |
| <FONT color="green">467</FONT> <a name="line.467"></a> |
| <FONT color="green">468</FONT> /**<a name="line.468"></a> |
| <FONT color="green">469</FONT> * @see DTMIterator#isMutable()<a name="line.469"></a> |
| <FONT color="green">470</FONT> */<a name="line.470"></a> |
| <FONT color="green">471</FONT> public boolean isMutable()<a name="line.471"></a> |
| <FONT color="green">472</FONT> {<a name="line.472"></a> |
| <FONT color="green">473</FONT> return hasCache(); // though may be surprising if it also has an iterator!<a name="line.473"></a> |
| <FONT color="green">474</FONT> }<a name="line.474"></a> |
| <FONT color="green">475</FONT> <a name="line.475"></a> |
| <FONT color="green">476</FONT> /**<a name="line.476"></a> |
| <FONT color="green">477</FONT> * @see DTMIterator#getCurrentPos()<a name="line.477"></a> |
| <FONT color="green">478</FONT> */<a name="line.478"></a> |
| <FONT color="green">479</FONT> public int getCurrentPos()<a name="line.479"></a> |
| <FONT color="green">480</FONT> {<a name="line.480"></a> |
| <FONT color="green">481</FONT> return m_next;<a name="line.481"></a> |
| <FONT color="green">482</FONT> }<a name="line.482"></a> |
| <FONT color="green">483</FONT> <a name="line.483"></a> |
| <FONT color="green">484</FONT> /**<a name="line.484"></a> |
| <FONT color="green">485</FONT> * @see DTMIterator#runTo(int)<a name="line.485"></a> |
| <FONT color="green">486</FONT> */<a name="line.486"></a> |
| <FONT color="green">487</FONT> public void runTo(int index)<a name="line.487"></a> |
| <FONT color="green">488</FONT> {<a name="line.488"></a> |
| <FONT color="green">489</FONT> int n;<a name="line.489"></a> |
| <FONT color="green">490</FONT> <a name="line.490"></a> |
| <FONT color="green">491</FONT> if (-1 == index)<a name="line.491"></a> |
| <FONT color="green">492</FONT> {<a name="line.492"></a> |
| <FONT color="green">493</FONT> int pos = m_next;<a name="line.493"></a> |
| <FONT color="green">494</FONT> while (DTM.NULL != (n = nextNode()));<a name="line.494"></a> |
| <FONT color="green">495</FONT> m_next = pos;<a name="line.495"></a> |
| <FONT color="green">496</FONT> }<a name="line.496"></a> |
| <FONT color="green">497</FONT> else if(m_next == index)<a name="line.497"></a> |
| <FONT color="green">498</FONT> {<a name="line.498"></a> |
| <FONT color="green">499</FONT> return;<a name="line.499"></a> |
| <FONT color="green">500</FONT> }<a name="line.500"></a> |
| <FONT color="green">501</FONT> else if(hasCache() && m_next < getVector().size())<a name="line.501"></a> |
| <FONT color="green">502</FONT> {<a name="line.502"></a> |
| <FONT color="green">503</FONT> m_next = index;<a name="line.503"></a> |
| <FONT color="green">504</FONT> }<a name="line.504"></a> |
| <FONT color="green">505</FONT> else if((null == getVector()) && (index < m_next))<a name="line.505"></a> |
| <FONT color="green">506</FONT> {<a name="line.506"></a> |
| <FONT color="green">507</FONT> while ((m_next >= index) && DTM.NULL != (n = previousNode()));<a name="line.507"></a> |
| <FONT color="green">508</FONT> }<a name="line.508"></a> |
| <FONT color="green">509</FONT> else<a name="line.509"></a> |
| <FONT color="green">510</FONT> { <a name="line.510"></a> |
| <FONT color="green">511</FONT> while ((m_next < index) && DTM.NULL != (n = nextNode()));<a name="line.511"></a> |
| <FONT color="green">512</FONT> }<a name="line.512"></a> |
| <FONT color="green">513</FONT> <a name="line.513"></a> |
| <FONT color="green">514</FONT> }<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> * @see DTMIterator#setCurrentPos(int)<a name="line.517"></a> |
| <FONT color="green">518</FONT> */<a name="line.518"></a> |
| <FONT color="green">519</FONT> public void setCurrentPos(int i)<a name="line.519"></a> |
| <FONT color="green">520</FONT> {<a name="line.520"></a> |
| <FONT color="green">521</FONT> runTo(i);<a name="line.521"></a> |
| <FONT color="green">522</FONT> }<a name="line.522"></a> |
| <FONT color="green">523</FONT> <a name="line.523"></a> |
| <FONT color="green">524</FONT> /**<a name="line.524"></a> |
| <FONT color="green">525</FONT> * @see DTMIterator#item(int)<a name="line.525"></a> |
| <FONT color="green">526</FONT> */<a name="line.526"></a> |
| <FONT color="green">527</FONT> public int item(int index)<a name="line.527"></a> |
| <FONT color="green">528</FONT> {<a name="line.528"></a> |
| <FONT color="green">529</FONT> setCurrentPos(index);<a name="line.529"></a> |
| <FONT color="green">530</FONT> int n = nextNode();<a name="line.530"></a> |
| <FONT color="green">531</FONT> m_next = index;<a name="line.531"></a> |
| <FONT color="green">532</FONT> return n;<a name="line.532"></a> |
| <FONT color="green">533</FONT> }<a name="line.533"></a> |
| <FONT color="green">534</FONT> <a name="line.534"></a> |
| <FONT color="green">535</FONT> /**<a name="line.535"></a> |
| <FONT color="green">536</FONT> * @see DTMIterator#setItem(int, int)<a name="line.536"></a> |
| <FONT color="green">537</FONT> */<a name="line.537"></a> |
| <FONT color="green">538</FONT> public void setItem(int node, int index)<a name="line.538"></a> |
| <FONT color="green">539</FONT> {<a name="line.539"></a> |
| <FONT color="green">540</FONT> NodeVector vec = getVector();<a name="line.540"></a> |
| <FONT color="green">541</FONT> if(null != vec)<a name="line.541"></a> |
| <FONT color="green">542</FONT> {<a name="line.542"></a> |
| <FONT color="green">543</FONT> int oldNode = vec.elementAt(index);<a name="line.543"></a> |
| <FONT color="green">544</FONT> if (oldNode != node && m_cache.useCount() > 1) {<a name="line.544"></a> |
| <FONT color="green">545</FONT> /* If we are going to set the node at the given index<a name="line.545"></a> |
| <FONT color="green">546</FONT> * to a different value, and the cache is shared<a name="line.546"></a> |
| <FONT color="green">547</FONT> * (has a use count greater than 1)<a name="line.547"></a> |
| <FONT color="green">548</FONT> * then make a copy of the cache and use it<a name="line.548"></a> |
| <FONT color="green">549</FONT> * so we don't overwrite the value for other<a name="line.549"></a> |
| <FONT color="green">550</FONT> * users of the cache.<a name="line.550"></a> |
| <FONT color="green">551</FONT> */<a name="line.551"></a> |
| <FONT color="green">552</FONT> IteratorCache newCache = new IteratorCache();<a name="line.552"></a> |
| <FONT color="green">553</FONT> final NodeVector nv;<a name="line.553"></a> |
| <FONT color="green">554</FONT> try {<a name="line.554"></a> |
| <FONT color="green">555</FONT> nv = (NodeVector) vec.clone();<a name="line.555"></a> |
| <FONT color="green">556</FONT> } catch (CloneNotSupportedException e) {<a name="line.556"></a> |
| <FONT color="green">557</FONT> // This should never happen<a name="line.557"></a> |
| <FONT color="green">558</FONT> e.printStackTrace();<a name="line.558"></a> |
| <FONT color="green">559</FONT> RuntimeException rte = new RuntimeException(e.getMessage()); <a name="line.559"></a> |
| <FONT color="green">560</FONT> throw rte;<a name="line.560"></a> |
| <FONT color="green">561</FONT> }<a name="line.561"></a> |
| <FONT color="green">562</FONT> newCache.setVector(nv);<a name="line.562"></a> |
| <FONT color="green">563</FONT> newCache.setCacheComplete(true);<a name="line.563"></a> |
| <FONT color="green">564</FONT> m_cache = newCache;<a name="line.564"></a> |
| <FONT color="green">565</FONT> vec = nv;<a name="line.565"></a> |
| <FONT color="green">566</FONT> <a name="line.566"></a> |
| <FONT color="green">567</FONT> // Keep our superclass informed of the current NodeVector<a name="line.567"></a> |
| <FONT color="green">568</FONT> super.setObject(nv); <a name="line.568"></a> |
| <FONT color="green">569</FONT> <a name="line.569"></a> |
| <FONT color="green">570</FONT> /* When we get to here the new cache has<a name="line.570"></a> |
| <FONT color="green">571</FONT> * a use count of 1 and when setting a<a name="line.571"></a> |
| <FONT color="green">572</FONT> * bunch of values on the same NodeSequence,<a name="line.572"></a> |
| <FONT color="green">573</FONT> * such as when sorting, we will keep setting<a name="line.573"></a> |
| <FONT color="green">574</FONT> * values in that same copy which has a use count of 1.<a name="line.574"></a> |
| <FONT color="green">575</FONT> */<a name="line.575"></a> |
| <FONT color="green">576</FONT> }<a name="line.576"></a> |
| <FONT color="green">577</FONT> vec.setElementAt(node, index);<a name="line.577"></a> |
| <FONT color="green">578</FONT> m_last = vec.size();<a name="line.578"></a> |
| <FONT color="green">579</FONT> }<a name="line.579"></a> |
| <FONT color="green">580</FONT> else<a name="line.580"></a> |
| <FONT color="green">581</FONT> m_iter.setItem(node, index);<a name="line.581"></a> |
| <FONT color="green">582</FONT> }<a name="line.582"></a> |
| <FONT color="green">583</FONT> <a name="line.583"></a> |
| <FONT color="green">584</FONT> /**<a name="line.584"></a> |
| <FONT color="green">585</FONT> * @see DTMIterator#getLength()<a name="line.585"></a> |
| <FONT color="green">586</FONT> */<a name="line.586"></a> |
| <FONT color="green">587</FONT> public int getLength()<a name="line.587"></a> |
| <FONT color="green">588</FONT> {<a name="line.588"></a> |
| <FONT color="green">589</FONT> IteratorCache cache = getCache();<a name="line.589"></a> |
| <FONT color="green">590</FONT> <a name="line.590"></a> |
| <FONT color="green">591</FONT> if(cache != null)<a name="line.591"></a> |
| <FONT color="green">592</FONT> {<a name="line.592"></a> |
| <FONT color="green">593</FONT> // Nodes from the iterator are cached<a name="line.593"></a> |
| <FONT color="green">594</FONT> if (cache.isComplete()) {<a name="line.594"></a> |
| <FONT color="green">595</FONT> // All of the nodes from the iterator are cached<a name="line.595"></a> |
| <FONT color="green">596</FONT> // so just return the number of nodes in the cache<a name="line.596"></a> |
| <FONT color="green">597</FONT> NodeVector nv = cache.getVector();<a name="line.597"></a> |
| <FONT color="green">598</FONT> return nv.size();<a name="line.598"></a> |
| <FONT color="green">599</FONT> }<a name="line.599"></a> |
| <FONT color="green">600</FONT> <a name="line.600"></a> |
| <FONT color="green">601</FONT> // If this NodeSequence wraps a mutable nodeset, then<a name="line.601"></a> |
| <FONT color="green">602</FONT> // m_last will not reflect the size of the nodeset if<a name="line.602"></a> |
| <FONT color="green">603</FONT> // it has been mutated...<a name="line.603"></a> |
| <FONT color="green">604</FONT> if (m_iter instanceof NodeSetDTM)<a name="line.604"></a> |
| <FONT color="green">605</FONT> {<a name="line.605"></a> |
| <FONT color="green">606</FONT> return m_iter.getLength();<a name="line.606"></a> |
| <FONT color="green">607</FONT> } <a name="line.607"></a> |
| <FONT color="green">608</FONT> <a name="line.608"></a> |
| <FONT color="green">609</FONT> if(-1 == m_last)<a name="line.609"></a> |
| <FONT color="green">610</FONT> {<a name="line.610"></a> |
| <FONT color="green">611</FONT> int pos = m_next;<a name="line.611"></a> |
| <FONT color="green">612</FONT> runTo(-1);<a name="line.612"></a> |
| <FONT color="green">613</FONT> m_next = pos;<a name="line.613"></a> |
| <FONT color="green">614</FONT> }<a name="line.614"></a> |
| <FONT color="green">615</FONT> return m_last;<a name="line.615"></a> |
| <FONT color="green">616</FONT> }<a name="line.616"></a> |
| <FONT color="green">617</FONT> else<a name="line.617"></a> |
| <FONT color="green">618</FONT> {<a name="line.618"></a> |
| <FONT color="green">619</FONT> return (-1 == m_last) ? (m_last = m_iter.getLength()) : m_last;<a name="line.619"></a> |
| <FONT color="green">620</FONT> }<a name="line.620"></a> |
| <FONT color="green">621</FONT> }<a name="line.621"></a> |
| <FONT color="green">622</FONT> <a name="line.622"></a> |
| <FONT color="green">623</FONT> /**<a name="line.623"></a> |
| <FONT color="green">624</FONT> * Note: Not a deep clone.<a name="line.624"></a> |
| <FONT color="green">625</FONT> * @see DTMIterator#cloneWithReset()<a name="line.625"></a> |
| <FONT color="green">626</FONT> */<a name="line.626"></a> |
| <FONT color="green">627</FONT> public DTMIterator cloneWithReset() throws CloneNotSupportedException<a name="line.627"></a> |
| <FONT color="green">628</FONT> {<a name="line.628"></a> |
| <FONT color="green">629</FONT> NodeSequence seq = (NodeSequence)super.clone();<a name="line.629"></a> |
| <FONT color="green">630</FONT> seq.m_next = 0;<a name="line.630"></a> |
| <FONT color="green">631</FONT> if (m_cache != null) {<a name="line.631"></a> |
| <FONT color="green">632</FONT> // In making this clone of an iterator we are making<a name="line.632"></a> |
| <FONT color="green">633</FONT> // another NodeSequence object it has a reference<a name="line.633"></a> |
| <FONT color="green">634</FONT> // to the same IteratorCache object as the original<a name="line.634"></a> |
| <FONT color="green">635</FONT> // so we need to remember that more than one<a name="line.635"></a> |
| <FONT color="green">636</FONT> // NodeSequence object shares the cache.<a name="line.636"></a> |
| <FONT color="green">637</FONT> m_cache.increaseUseCount();<a name="line.637"></a> |
| <FONT color="green">638</FONT> }<a name="line.638"></a> |
| <FONT color="green">639</FONT> <a name="line.639"></a> |
| <FONT color="green">640</FONT> return seq;<a name="line.640"></a> |
| <FONT color="green">641</FONT> }<a name="line.641"></a> |
| <FONT color="green">642</FONT> <a name="line.642"></a> |
| <FONT color="green">643</FONT> /**<a name="line.643"></a> |
| <FONT color="green">644</FONT> * Get a clone of this iterator, but don't reset the iteration in the <a name="line.644"></a> |
| <FONT color="green">645</FONT> * process, so that it may be used from the current position.<a name="line.645"></a> |
| <FONT color="green">646</FONT> * Note: Not a deep clone.<a name="line.646"></a> |
| <FONT color="green">647</FONT> *<a name="line.647"></a> |
| <FONT color="green">648</FONT> * @return A clone of this object.<a name="line.648"></a> |
| <FONT color="green">649</FONT> *<a name="line.649"></a> |
| <FONT color="green">650</FONT> * @throws CloneNotSupportedException<a name="line.650"></a> |
| <FONT color="green">651</FONT> */<a name="line.651"></a> |
| <FONT color="green">652</FONT> public Object clone() throws CloneNotSupportedException<a name="line.652"></a> |
| <FONT color="green">653</FONT> {<a name="line.653"></a> |
| <FONT color="green">654</FONT> NodeSequence clone = (NodeSequence) super.clone();<a name="line.654"></a> |
| <FONT color="green">655</FONT> if (null != m_iter) clone.m_iter = (DTMIterator) m_iter.clone();<a name="line.655"></a> |
| <FONT color="green">656</FONT> if (m_cache != null) {<a name="line.656"></a> |
| <FONT color="green">657</FONT> // In making this clone of an iterator we are making<a name="line.657"></a> |
| <FONT color="green">658</FONT> // another NodeSequence object it has a reference<a name="line.658"></a> |
| <FONT color="green">659</FONT> // to the same IteratorCache object as the original<a name="line.659"></a> |
| <FONT color="green">660</FONT> // so we need to remember that more than one<a name="line.660"></a> |
| <FONT color="green">661</FONT> // NodeSequence object shares the cache.<a name="line.661"></a> |
| <FONT color="green">662</FONT> m_cache.increaseUseCount();<a name="line.662"></a> |
| <FONT color="green">663</FONT> }<a name="line.663"></a> |
| <FONT color="green">664</FONT> <a name="line.664"></a> |
| <FONT color="green">665</FONT> return clone;<a name="line.665"></a> |
| <FONT color="green">666</FONT> }<a name="line.666"></a> |
| <FONT color="green">667</FONT> <a name="line.667"></a> |
| <FONT color="green">668</FONT> <a name="line.668"></a> |
| <FONT color="green">669</FONT> /**<a name="line.669"></a> |
| <FONT color="green">670</FONT> * @see DTMIterator#isDocOrdered()<a name="line.670"></a> |
| <FONT color="green">671</FONT> */<a name="line.671"></a> |
| <FONT color="green">672</FONT> public boolean isDocOrdered()<a name="line.672"></a> |
| <FONT color="green">673</FONT> {<a name="line.673"></a> |
| <FONT color="green">674</FONT> if(null != m_iter)<a name="line.674"></a> |
| <FONT color="green">675</FONT> return m_iter.isDocOrdered();<a name="line.675"></a> |
| <FONT color="green">676</FONT> else<a name="line.676"></a> |
| <FONT color="green">677</FONT> return true; // can't be sure?<a name="line.677"></a> |
| <FONT color="green">678</FONT> }<a name="line.678"></a> |
| <FONT color="green">679</FONT> <a name="line.679"></a> |
| <FONT color="green">680</FONT> /**<a name="line.680"></a> |
| <FONT color="green">681</FONT> * @see DTMIterator#getAxis()<a name="line.681"></a> |
| <FONT color="green">682</FONT> */<a name="line.682"></a> |
| <FONT color="green">683</FONT> public int getAxis()<a name="line.683"></a> |
| <FONT color="green">684</FONT> {<a name="line.684"></a> |
| <FONT color="green">685</FONT> if(null != m_iter)<a name="line.685"></a> |
| <FONT color="green">686</FONT> return m_iter.getAxis();<a name="line.686"></a> |
| <FONT color="green">687</FONT> else<a name="line.687"></a> |
| <FONT color="green">688</FONT> {<a name="line.688"></a> |
| <FONT color="green">689</FONT> assertion(false, "Can not getAxis from a non-iterated node sequence!");<a name="line.689"></a> |
| <FONT color="green">690</FONT> return 0;<a name="line.690"></a> |
| <FONT color="green">691</FONT> }<a name="line.691"></a> |
| <FONT color="green">692</FONT> }<a name="line.692"></a> |
| <FONT color="green">693</FONT> <a name="line.693"></a> |
| <FONT color="green">694</FONT> /**<a name="line.694"></a> |
| <FONT color="green">695</FONT> * @see PathComponent#getAnalysisBits()<a name="line.695"></a> |
| <FONT color="green">696</FONT> */<a name="line.696"></a> |
| <FONT color="green">697</FONT> public int getAnalysisBits()<a name="line.697"></a> |
| <FONT color="green">698</FONT> {<a name="line.698"></a> |
| <FONT color="green">699</FONT> if((null != m_iter) && (m_iter instanceof PathComponent))<a name="line.699"></a> |
| <FONT color="green">700</FONT> return ((PathComponent)m_iter).getAnalysisBits();<a name="line.700"></a> |
| <FONT color="green">701</FONT> else<a name="line.701"></a> |
| <FONT color="green">702</FONT> return 0;<a name="line.702"></a> |
| <FONT color="green">703</FONT> }<a name="line.703"></a> |
| <FONT color="green">704</FONT> <a name="line.704"></a> |
| <FONT color="green">705</FONT> /**<a name="line.705"></a> |
| <FONT color="green">706</FONT> * @see org.apache.xpath.Expression#fixupVariables(Vector, int)<a name="line.706"></a> |
| <FONT color="green">707</FONT> */<a name="line.707"></a> |
| <FONT color="green">708</FONT> public void fixupVariables(Vector vars, int globalsSize)<a name="line.708"></a> |
| <FONT color="green">709</FONT> {<a name="line.709"></a> |
| <FONT color="green">710</FONT> super.fixupVariables(vars, globalsSize);<a name="line.710"></a> |
| <FONT color="green">711</FONT> } <a name="line.711"></a> |
| <FONT color="green">712</FONT> <a name="line.712"></a> |
| <FONT color="green">713</FONT> /**<a name="line.713"></a> |
| <FONT color="green">714</FONT> * Add the node into a vector of nodes where it should occur in<a name="line.714"></a> |
| <FONT color="green">715</FONT> * document order.<a name="line.715"></a> |
| <FONT color="green">716</FONT> * @param node The node to be added.<a name="line.716"></a> |
| <FONT color="green">717</FONT> * @return insertIndex.<a name="line.717"></a> |
| <FONT color="green">718</FONT> * @throws RuntimeException thrown if this NodeSetDTM is not of <a name="line.718"></a> |
| <FONT color="green">719</FONT> * a mutable type.<a name="line.719"></a> |
| <FONT color="green">720</FONT> */<a name="line.720"></a> |
| <FONT color="green">721</FONT> protected int addNodeInDocOrder(int node)<a name="line.721"></a> |
| <FONT color="green">722</FONT> {<a name="line.722"></a> |
| <FONT color="green">723</FONT> assertion(hasCache(), "addNodeInDocOrder must be done on a mutable sequence!");<a name="line.723"></a> |
| <FONT color="green">724</FONT> <a name="line.724"></a> |
| <FONT color="green">725</FONT> int insertIndex = -1;<a name="line.725"></a> |
| <FONT color="green">726</FONT> <a name="line.726"></a> |
| <FONT color="green">727</FONT> NodeVector vec = getVector();<a name="line.727"></a> |
| <FONT color="green">728</FONT> <a name="line.728"></a> |
| <FONT color="green">729</FONT> // This needs to do a binary search, but a binary search <a name="line.729"></a> |
| <FONT color="green">730</FONT> // is somewhat tough because the sequence test involves <a name="line.730"></a> |
| <FONT color="green">731</FONT> // two nodes.<a name="line.731"></a> |
| <FONT color="green">732</FONT> int size = vec.size(), i;<a name="line.732"></a> |
| <FONT color="green">733</FONT> <a name="line.733"></a> |
| <FONT color="green">734</FONT> for (i = size - 1; i >= 0; i--)<a name="line.734"></a> |
| <FONT color="green">735</FONT> {<a name="line.735"></a> |
| <FONT color="green">736</FONT> int child = vec.elementAt(i);<a name="line.736"></a> |
| <FONT color="green">737</FONT> <a name="line.737"></a> |
| <FONT color="green">738</FONT> if (child == node)<a name="line.738"></a> |
| <FONT color="green">739</FONT> {<a name="line.739"></a> |
| <FONT color="green">740</FONT> i = -2; // Duplicate, suppress insert<a name="line.740"></a> |
| <FONT color="green">741</FONT> <a name="line.741"></a> |
| <FONT color="green">742</FONT> break;<a name="line.742"></a> |
| <FONT color="green">743</FONT> }<a name="line.743"></a> |
| <FONT color="green">744</FONT> <a name="line.744"></a> |
| <FONT color="green">745</FONT> DTM dtm = m_dtmMgr.getDTM(node);<a name="line.745"></a> |
| <FONT color="green">746</FONT> if (!dtm.isNodeAfter(node, child))<a name="line.746"></a> |
| <FONT color="green">747</FONT> {<a name="line.747"></a> |
| <FONT color="green">748</FONT> break;<a name="line.748"></a> |
| <FONT color="green">749</FONT> }<a name="line.749"></a> |
| <FONT color="green">750</FONT> }<a name="line.750"></a> |
| <FONT color="green">751</FONT> <a name="line.751"></a> |
| <FONT color="green">752</FONT> if (i != -2)<a name="line.752"></a> |
| <FONT color="green">753</FONT> {<a name="line.753"></a> |
| <FONT color="green">754</FONT> insertIndex = i + 1;<a name="line.754"></a> |
| <FONT color="green">755</FONT> <a name="line.755"></a> |
| <FONT color="green">756</FONT> vec.insertElementAt(node, insertIndex);<a name="line.756"></a> |
| <FONT color="green">757</FONT> }<a name="line.757"></a> |
| <FONT color="green">758</FONT> <a name="line.758"></a> |
| <FONT color="green">759</FONT> // checkDups();<a name="line.759"></a> |
| <FONT color="green">760</FONT> return insertIndex;<a name="line.760"></a> |
| <FONT color="green">761</FONT> } // end addNodeInDocOrder(Vector v, Object obj)<a name="line.761"></a> |
| <FONT color="green">762</FONT> <a name="line.762"></a> |
| <FONT color="green">763</FONT> /**<a name="line.763"></a> |
| <FONT color="green">764</FONT> * It used to be that many locations in the code simply<a name="line.764"></a> |
| <FONT color="green">765</FONT> * did an assignment to this.m_obj directly, rather than<a name="line.765"></a> |
| <FONT color="green">766</FONT> * calling the setObject(Object) method. The problem is<a name="line.766"></a> |
| <FONT color="green">767</FONT> * that our super-class would be updated on what the <a name="line.767"></a> |
| <FONT color="green">768</FONT> * cache associated with this NodeSequence, but<a name="line.768"></a> |
| <FONT color="green">769</FONT> * we wouldn't know ourselves.<a name="line.769"></a> |
| <FONT color="green">770</FONT> * <p><a name="line.770"></a> |
| <FONT color="green">771</FONT> * All setting of m_obj is done through setObject() now,<a name="line.771"></a> |
| <FONT color="green">772</FONT> * and this method over-rides the super-class method.<a name="line.772"></a> |
| <FONT color="green">773</FONT> * So now we are in the loop have an opportunity<a name="line.773"></a> |
| <FONT color="green">774</FONT> * to update some caching information.<a name="line.774"></a> |
| <FONT color="green">775</FONT> *<a name="line.775"></a> |
| <FONT color="green">776</FONT> */<a name="line.776"></a> |
| <FONT color="green">777</FONT> protected void setObject(Object obj) {<a name="line.777"></a> |
| <FONT color="green">778</FONT> if (obj instanceof NodeVector) {<a name="line.778"></a> |
| <FONT color="green">779</FONT> // Keep our superclass informed of the current NodeVector<a name="line.779"></a> |
| <FONT color="green">780</FONT> // ... if we don't the smoketest fails (don't know why).<a name="line.780"></a> |
| <FONT color="green">781</FONT> super.setObject(obj);<a name="line.781"></a> |
| <FONT color="green">782</FONT> <a name="line.782"></a> |
| <FONT color="green">783</FONT> // A copy of the code of what SetVector() would do.<a name="line.783"></a> |
| <FONT color="green">784</FONT> NodeVector v = (NodeVector)obj;<a name="line.784"></a> |
| <FONT color="green">785</FONT> if (m_cache != null) {<a name="line.785"></a> |
| <FONT color="green">786</FONT> m_cache.setVector(v);<a name="line.786"></a> |
| <FONT color="green">787</FONT> } else if (v!=null) {<a name="line.787"></a> |
| <FONT color="green">788</FONT> m_cache = new IteratorCache();<a name="line.788"></a> |
| <FONT color="green">789</FONT> m_cache.setVector(v);<a name="line.789"></a> |
| <FONT color="green">790</FONT> }<a name="line.790"></a> |
| <FONT color="green">791</FONT> } else if (obj instanceof IteratorCache) {<a name="line.791"></a> |
| <FONT color="green">792</FONT> IteratorCache cache = (IteratorCache) obj;<a name="line.792"></a> |
| <FONT color="green">793</FONT> m_cache = cache;<a name="line.793"></a> |
| <FONT color="green">794</FONT> m_cache.increaseUseCount();<a name="line.794"></a> |
| <FONT color="green">795</FONT> <a name="line.795"></a> |
| <FONT color="green">796</FONT> // Keep our superclass informed of the current NodeVector<a name="line.796"></a> |
| <FONT color="green">797</FONT> super.setObject(cache.getVector());<a name="line.797"></a> |
| <FONT color="green">798</FONT> } else {<a name="line.798"></a> |
| <FONT color="green">799</FONT> super.setObject(obj);<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> }<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> * Each NodeSequence object has an iterator which is "walked".<a name="line.805"></a> |
| <FONT color="green">806</FONT> * As an iterator is walked one obtains nodes from it.<a name="line.806"></a> |
| <FONT color="green">807</FONT> * As those nodes are obtained they may be cached, making<a name="line.807"></a> |
| <FONT color="green">808</FONT> * the next walking of a copy or clone of the iterator faster.<a name="line.808"></a> |
| <FONT color="green">809</FONT> * This field (m_cache) is a reference to such a cache, <a name="line.809"></a> |
| <FONT color="green">810</FONT> * which is populated as the iterator is walked.<a name="line.810"></a> |
| <FONT color="green">811</FONT> * <p><a name="line.811"></a> |
| <FONT color="green">812</FONT> * Note that multiple NodeSequence objects may hold a <a name="line.812"></a> |
| <FONT color="green">813</FONT> * reference to the same cache, and also <a name="line.813"></a> |
| <FONT color="green">814</FONT> * (and this is important) the same iterator.<a name="line.814"></a> |
| <FONT color="green">815</FONT> * The iterator and its cache may be shared among <a name="line.815"></a> |
| <FONT color="green">816</FONT> * many NodeSequence objects.<a name="line.816"></a> |
| <FONT color="green">817</FONT> * <p><a name="line.817"></a> |
| <FONT color="green">818</FONT> * If one of the NodeSequence objects walks ahead<a name="line.818"></a> |
| <FONT color="green">819</FONT> * of the others it fills in the cache.<a name="line.819"></a> |
| <FONT color="green">820</FONT> * As the others NodeSequence objects catch up they<a name="line.820"></a> |
| <FONT color="green">821</FONT> * get their values from<a name="line.821"></a> |
| <FONT color="green">822</FONT> * the cache rather than the iterator itself, so<a name="line.822"></a> |
| <FONT color="green">823</FONT> * the iterator is only ever walked once and everyone<a name="line.823"></a> |
| <FONT color="green">824</FONT> * benefits from the cache.<a name="line.824"></a> |
| <FONT color="green">825</FONT> * <p><a name="line.825"></a> |
| <FONT color="green">826</FONT> * At some point the cache may be<a name="line.826"></a> |
| <FONT color="green">827</FONT> * complete due to walking to the end of one of<a name="line.827"></a> |
| <FONT color="green">828</FONT> * the copies of the iterator, and the cache is<a name="line.828"></a> |
| <FONT color="green">829</FONT> * then marked as "complete".<a name="line.829"></a> |
| <FONT color="green">830</FONT> * and the cache will have no more nodes added to it.<a name="line.830"></a> |
| <FONT color="green">831</FONT> * <p><a name="line.831"></a> |
| <FONT color="green">832</FONT> * Its use-count is the number of NodeSequence objects that use it.<a name="line.832"></a> |
| <FONT color="green">833</FONT> */<a name="line.833"></a> |
| <FONT color="green">834</FONT> private final static class IteratorCache {<a name="line.834"></a> |
| <FONT color="green">835</FONT> /**<a name="line.835"></a> |
| <FONT color="green">836</FONT> * A list of nodes already obtained from the iterator.<a name="line.836"></a> |
| <FONT color="green">837</FONT> * As the iterator is walked the nodes obtained from<a name="line.837"></a> |
| <FONT color="green">838</FONT> * it are appended to this list.<a name="line.838"></a> |
| <FONT color="green">839</FONT> * <p><a name="line.839"></a> |
| <FONT color="green">840</FONT> * Both an iterator and its corresponding cache can<a name="line.840"></a> |
| <FONT color="green">841</FONT> * be shared by multiple NodeSequence objects.<a name="line.841"></a> |
| <FONT color="green">842</FONT> * <p><a name="line.842"></a> |
| <FONT color="green">843</FONT> * For example, consider three NodeSequence objects<a name="line.843"></a> |
| <FONT color="green">844</FONT> * ns1, ns2 and ns3 doing such sharing, and the<a name="line.844"></a> |
| <FONT color="green">845</FONT> * nodes to be obtaind from the iterator being <a name="line.845"></a> |
| <FONT color="green">846</FONT> * the sequence { 33, 11, 44, 22, 55 }.<a name="line.846"></a> |
| <FONT color="green">847</FONT> * <p><a name="line.847"></a> |
| <FONT color="green">848</FONT> * If ns3.nextNode() is called 3 times the the<a name="line.848"></a> |
| <FONT color="green">849</FONT> * underlying iterator will have walked through<a name="line.849"></a> |
| <FONT color="green">850</FONT> * 33, 11, 55 and these three nodes will have been put<a name="line.850"></a> |
| <FONT color="green">851</FONT> * in the cache.<a name="line.851"></a> |
| <FONT color="green">852</FONT> * <p><a name="line.852"></a> |
| <FONT color="green">853</FONT> * If ns2.nextNode() is called 2 times it will return<a name="line.853"></a> |
| <FONT color="green">854</FONT> * 33 and 11 from the cache, leaving the iterator alone.<a name="line.854"></a> |
| <FONT color="green">855</FONT> * <p><a name="line.855"></a> |
| <FONT color="green">856</FONT> * If ns1.nextNode() is called 6 times it will return<a name="line.856"></a> |
| <FONT color="green">857</FONT> * 33 and 11 from the cache, then get 44, 22, 55 from<a name="line.857"></a> |
| <FONT color="green">858</FONT> * the iterator, and appending 44, 22, 55 to the cache.<a name="line.858"></a> |
| <FONT color="green">859</FONT> * On the sixth call it is found that the iterator is<a name="line.859"></a> |
| <FONT color="green">860</FONT> * exhausted and the cache is marked complete.<a name="line.860"></a> |
| <FONT color="green">861</FONT> * <p><a name="line.861"></a> |
| <FONT color="green">862</FONT> * Should ns2 or ns3 have nextNode() called they will<a name="line.862"></a> |
| <FONT color="green">863</FONT> * know that the cache is complete, and they will<a name="line.863"></a> |
| <FONT color="green">864</FONT> * obtain all subsequent nodes from the cache.<a name="line.864"></a> |
| <FONT color="green">865</FONT> * <p><a name="line.865"></a> |
| <FONT color="green">866</FONT> * Note that the underlying iterator, though shared<a name="line.866"></a> |
| <FONT color="green">867</FONT> * is only ever walked once. <a name="line.867"></a> |
| <FONT color="green">868</FONT> */<a name="line.868"></a> |
| <FONT color="green">869</FONT> private NodeVector m_vec2;<a name="line.869"></a> |
| <FONT color="green">870</FONT> <a name="line.870"></a> |
| <FONT color="green">871</FONT> /**<a name="line.871"></a> |
| <FONT color="green">872</FONT> * true if the associated iterator is exhausted and<a name="line.872"></a> |
| <FONT color="green">873</FONT> * all nodes obtained from it are in the cache.<a name="line.873"></a> |
| <FONT color="green">874</FONT> */<a name="line.874"></a> |
| <FONT color="green">875</FONT> private boolean m_isComplete2;<a name="line.875"></a> |
| <FONT color="green">876</FONT> <a name="line.876"></a> |
| <FONT color="green">877</FONT> private int m_useCount2;<a name="line.877"></a> |
| <FONT color="green">878</FONT> <a name="line.878"></a> |
| <FONT color="green">879</FONT> IteratorCache() {<a name="line.879"></a> |
| <FONT color="green">880</FONT> m_vec2 = null;<a name="line.880"></a> |
| <FONT color="green">881</FONT> m_isComplete2 = false;<a name="line.881"></a> |
| <FONT color="green">882</FONT> m_useCount2 = 1;<a name="line.882"></a> |
| <FONT color="green">883</FONT> return;<a name="line.883"></a> |
| <FONT color="green">884</FONT> }<a name="line.884"></a> |
| <FONT color="green">885</FONT> <a name="line.885"></a> |
| <FONT color="green">886</FONT> /**<a name="line.886"></a> |
| <FONT color="green">887</FONT> * Returns count of how many NodeSequence objects share this<a name="line.887"></a> |
| <FONT color="green">888</FONT> * IteratorCache object.<a name="line.888"></a> |
| <FONT color="green">889</FONT> */<a name="line.889"></a> |
| <FONT color="green">890</FONT> private int useCount() {<a name="line.890"></a> |
| <FONT color="green">891</FONT> return m_useCount2;<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> /**<a name="line.894"></a> |
| <FONT color="green">895</FONT> * This method is called when yet another<a name="line.895"></a> |
| <FONT color="green">896</FONT> * NodeSequence object uses, or shares<a name="line.896"></a> |
| <FONT color="green">897</FONT> * this same cache.<a name="line.897"></a> |
| <FONT color="green">898</FONT> *<a name="line.898"></a> |
| <FONT color="green">899</FONT> */<a name="line.899"></a> |
| <FONT color="green">900</FONT> private void increaseUseCount() {<a name="line.900"></a> |
| <FONT color="green">901</FONT> if (m_vec2 != null)<a name="line.901"></a> |
| <FONT color="green">902</FONT> m_useCount2++;<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> * Sets the NodeVector that holds the<a name="line.907"></a> |
| <FONT color="green">908</FONT> * growing list of nodes as they are appended<a name="line.908"></a> |
| <FONT color="green">909</FONT> * to the cached list.<a name="line.909"></a> |
| <FONT color="green">910</FONT> */<a name="line.910"></a> |
| <FONT color="green">911</FONT> private void setVector(NodeVector nv) {<a name="line.911"></a> |
| <FONT color="green">912</FONT> m_vec2 = nv;<a name="line.912"></a> |
| <FONT color="green">913</FONT> m_useCount2 = 1;<a name="line.913"></a> |
| <FONT color="green">914</FONT> }<a name="line.914"></a> |
| <FONT color="green">915</FONT> <a name="line.915"></a> |
| <FONT color="green">916</FONT> /**<a name="line.916"></a> |
| <FONT color="green">917</FONT> * Get the cached list of nodes obtained from<a name="line.917"></a> |
| <FONT color="green">918</FONT> * the iterator so far.<a name="line.918"></a> |
| <FONT color="green">919</FONT> */<a name="line.919"></a> |
| <FONT color="green">920</FONT> private NodeVector getVector() {<a name="line.920"></a> |
| <FONT color="green">921</FONT> return m_vec2;<a name="line.921"></a> |
| <FONT color="green">922</FONT> }<a name="line.922"></a> |
| <FONT color="green">923</FONT> <a name="line.923"></a> |
| <FONT color="green">924</FONT> /**<a name="line.924"></a> |
| <FONT color="green">925</FONT> * Call this method with 'true' if the<a name="line.925"></a> |
| <FONT color="green">926</FONT> * iterator is exhausted and the cached list<a name="line.926"></a> |
| <FONT color="green">927</FONT> * is complete, or no longer growing.<a name="line.927"></a> |
| <FONT color="green">928</FONT> */<a name="line.928"></a> |
| <FONT color="green">929</FONT> private void setCacheComplete(boolean b) {<a name="line.929"></a> |
| <FONT color="green">930</FONT> m_isComplete2 = b;<a name="line.930"></a> |
| <FONT color="green">931</FONT> <a name="line.931"></a> |
| <FONT color="green">932</FONT> }<a name="line.932"></a> |
| <FONT color="green">933</FONT> <a name="line.933"></a> |
| <FONT color="green">934</FONT> /**<a name="line.934"></a> |
| <FONT color="green">935</FONT> * Returns true if no cache is complete<a name="line.935"></a> |
| <FONT color="green">936</FONT> * and immutable.<a name="line.936"></a> |
| <FONT color="green">937</FONT> */<a name="line.937"></a> |
| <FONT color="green">938</FONT> private boolean isComplete() {<a name="line.938"></a> |
| <FONT color="green">939</FONT> return m_isComplete2;<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> |
| <FONT color="green">943</FONT> /**<a name="line.943"></a> |
| <FONT color="green">944</FONT> * Get the cached list of nodes appended with<a name="line.944"></a> |
| <FONT color="green">945</FONT> * values obtained from the iterator as<a name="line.945"></a> |
| <FONT color="green">946</FONT> * a NodeSequence is walked when its<a name="line.946"></a> |
| <FONT color="green">947</FONT> * nextNode() method is called.<a name="line.947"></a> |
| <FONT color="green">948</FONT> */<a name="line.948"></a> |
| <FONT color="green">949</FONT> protected IteratorCache getIteratorCache() {<a name="line.949"></a> |
| <FONT color="green">950</FONT> return m_cache;<a name="line.950"></a> |
| <FONT color="green">951</FONT> }<a name="line.951"></a> |
| <FONT color="green">952</FONT> }<a name="line.952"></a> |
| <FONT color="green">953</FONT> <a name="line.953"></a> |
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