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| author | dwinter |
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| date | Tue, 04 Jan 2011 10:02:07 +0100 |
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<HTML> <BODY BGCOLOR="white"> <PRE> <FONT color="green">001</FONT> /*<a name="line.1"></a> <FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a> <FONT color="green">003</FONT> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a> <FONT color="green">004</FONT> * this work for additional information regarding copyright ownership.<a name="line.4"></a> <FONT color="green">005</FONT> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a> <FONT color="green">006</FONT> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a> <FONT color="green">007</FONT> * the License. You may obtain a copy of the License at<a name="line.7"></a> <FONT color="green">008</FONT> *<a name="line.8"></a> <FONT color="green">009</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a> <FONT color="green">010</FONT> *<a name="line.10"></a> <FONT color="green">011</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a> <FONT color="green">012</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a> <FONT color="green">013</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a> <FONT color="green">014</FONT> * See the License for the specific language governing permissions and<a name="line.14"></a> <FONT color="green">015</FONT> * limitations under the License.<a name="line.15"></a> <FONT color="green">016</FONT> */<a name="line.16"></a> <FONT color="green">017</FONT> package org.apache.commons.math.linear;<a name="line.17"></a> <FONT color="green">018</FONT> <a name="line.18"></a> <FONT color="green">019</FONT> import java.io.Serializable;<a name="line.19"></a> <FONT color="green">020</FONT> <a name="line.20"></a> <FONT color="green">021</FONT> import org.apache.commons.math.MathRuntimeException;<a name="line.21"></a> <FONT color="green">022</FONT> import org.apache.commons.math.util.OpenIntToDoubleHashMap;<a name="line.22"></a> <FONT color="green">023</FONT> import org.apache.commons.math.util.OpenIntToDoubleHashMap.Iterator;<a name="line.23"></a> <FONT color="green">024</FONT> <a name="line.24"></a> <FONT color="green">025</FONT> /**<a name="line.25"></a> <FONT color="green">026</FONT> * This class implements the {@link RealVector} interface with a {@link OpenIntToDoubleHashMap} backing store.<a name="line.26"></a> <FONT color="green">027</FONT> * @version $Revision: 925812 $ $Date: 2010-03-21 11:49:31 -0400 (Sun, 21 Mar 2010) $<a name="line.27"></a> <FONT color="green">028</FONT> * @since 2.0<a name="line.28"></a> <FONT color="green">029</FONT> */<a name="line.29"></a> <FONT color="green">030</FONT> public class OpenMapRealVector extends AbstractRealVector implements SparseRealVector, Serializable {<a name="line.30"></a> <FONT color="green">031</FONT> <a name="line.31"></a> <FONT color="green">032</FONT> /** Default Tolerance for having a value considered zero. */<a name="line.32"></a> <FONT color="green">033</FONT> public static final double DEFAULT_ZERO_TOLERANCE = 1.0e-12;<a name="line.33"></a> <FONT color="green">034</FONT> <a name="line.34"></a> <FONT color="green">035</FONT> /** Serializable version identifier. */<a name="line.35"></a> <FONT color="green">036</FONT> private static final long serialVersionUID = 8772222695580707260L;<a name="line.36"></a> <FONT color="green">037</FONT> <a name="line.37"></a> <FONT color="green">038</FONT> /** Entries of the vector. */<a name="line.38"></a> <FONT color="green">039</FONT> private final OpenIntToDoubleHashMap entries;<a name="line.39"></a> <FONT color="green">040</FONT> <a name="line.40"></a> <FONT color="green">041</FONT> /** Dimension of the vector. */<a name="line.41"></a> <FONT color="green">042</FONT> private final int virtualSize;<a name="line.42"></a> <FONT color="green">043</FONT> <a name="line.43"></a> <FONT color="green">044</FONT> /** Tolerance for having a value considered zero. */<a name="line.44"></a> <FONT color="green">045</FONT> private double epsilon;<a name="line.45"></a> <FONT color="green">046</FONT> <a name="line.46"></a> <FONT color="green">047</FONT> /**<a name="line.47"></a> <FONT color="green">048</FONT> * Build a 0-length vector.<a name="line.48"></a> <FONT color="green">049</FONT> * <p>Zero-length vectors may be used to initialized construction of vectors<a name="line.49"></a> <FONT color="green">050</FONT> * by data gathering. We start with zero-length and use either the {@link<a name="line.50"></a> <FONT color="green">051</FONT> * #OpenMapRealVector(OpenMapRealVector, int)} constructor<a name="line.51"></a> <FONT color="green">052</FONT> * or one of the <code>append</code> method ({@link #append(double)}, {@link<a name="line.52"></a> <FONT color="green">053</FONT> * #append(double[])}, {@link #append(RealVector)}) to gather data<a name="line.53"></a> <FONT color="green">054</FONT> * into this vector.</p><a name="line.54"></a> <FONT color="green">055</FONT> */<a name="line.55"></a> <FONT color="green">056</FONT> public OpenMapRealVector() {<a name="line.56"></a> <FONT color="green">057</FONT> this(0, DEFAULT_ZERO_TOLERANCE);<a name="line.57"></a> <FONT color="green">058</FONT> }<a name="line.58"></a> <FONT color="green">059</FONT> <a name="line.59"></a> <FONT color="green">060</FONT> /**<a name="line.60"></a> <FONT color="green">061</FONT> * Construct a (dimension)-length vector of zeros.<a name="line.61"></a> <FONT color="green">062</FONT> * @param dimension size of the vector<a name="line.62"></a> <FONT color="green">063</FONT> */<a name="line.63"></a> <FONT color="green">064</FONT> public OpenMapRealVector(int dimension) {<a name="line.64"></a> <FONT color="green">065</FONT> this(dimension, DEFAULT_ZERO_TOLERANCE);<a name="line.65"></a> <FONT color="green">066</FONT> }<a name="line.66"></a> <FONT color="green">067</FONT> <a name="line.67"></a> <FONT color="green">068</FONT> /**<a name="line.68"></a> <FONT color="green">069</FONT> * Construct a (dimension)-length vector of zeros, specifying zero tolerance.<a name="line.69"></a> <FONT color="green">070</FONT> * @param dimension Size of the vector<a name="line.70"></a> <FONT color="green">071</FONT> * @param epsilon The tolerance for having a value considered zero<a name="line.71"></a> <FONT color="green">072</FONT> */<a name="line.72"></a> <FONT color="green">073</FONT> public OpenMapRealVector(int dimension, double epsilon) {<a name="line.73"></a> <FONT color="green">074</FONT> virtualSize = dimension;<a name="line.74"></a> <FONT color="green">075</FONT> entries = new OpenIntToDoubleHashMap(0.0);<a name="line.75"></a> <FONT color="green">076</FONT> this.epsilon = epsilon;<a name="line.76"></a> <FONT color="green">077</FONT> }<a name="line.77"></a> <FONT color="green">078</FONT> <a name="line.78"></a> <FONT color="green">079</FONT> /**<a name="line.79"></a> <FONT color="green">080</FONT> * Build a resized vector, for use with append.<a name="line.80"></a> <FONT color="green">081</FONT> * @param v The original vector<a name="line.81"></a> <FONT color="green">082</FONT> * @param resize The amount to resize it<a name="line.82"></a> <FONT color="green">083</FONT> */<a name="line.83"></a> <FONT color="green">084</FONT> protected OpenMapRealVector(OpenMapRealVector v, int resize) {<a name="line.84"></a> <FONT color="green">085</FONT> virtualSize = v.getDimension() + resize;<a name="line.85"></a> <FONT color="green">086</FONT> entries = new OpenIntToDoubleHashMap(v.entries);<a name="line.86"></a> <FONT color="green">087</FONT> epsilon = v.epsilon;<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> /**<a name="line.90"></a> <FONT color="green">091</FONT> * Build a vector with known the sparseness (for advanced use only).<a name="line.91"></a> <FONT color="green">092</FONT> * @param dimension The size of the vector<a name="line.92"></a> <FONT color="green">093</FONT> * @param expectedSize The expected number of non-zero entries<a name="line.93"></a> <FONT color="green">094</FONT> */<a name="line.94"></a> <FONT color="green">095</FONT> public OpenMapRealVector(int dimension, int expectedSize) {<a name="line.95"></a> <FONT color="green">096</FONT> this(dimension, expectedSize, DEFAULT_ZERO_TOLERANCE);<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> * Build a vector with known the sparseness and zero tolerance setting (for advanced use only).<a name="line.100"></a> <FONT color="green">101</FONT> * @param dimension The size of the vector<a name="line.101"></a> <FONT color="green">102</FONT> * @param expectedSize The expected number of non-zero entries<a name="line.102"></a> <FONT color="green">103</FONT> * @param epsilon The tolerance for having a value considered zero<a name="line.103"></a> <FONT color="green">104</FONT> */<a name="line.104"></a> <FONT color="green">105</FONT> public OpenMapRealVector(int dimension, int expectedSize, double epsilon) {<a name="line.105"></a> <FONT color="green">106</FONT> virtualSize = dimension;<a name="line.106"></a> <FONT color="green">107</FONT> entries = new OpenIntToDoubleHashMap(expectedSize, 0.0);<a name="line.107"></a> <FONT color="green">108</FONT> this.epsilon = epsilon;<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> /**<a name="line.111"></a> <FONT color="green">112</FONT> * Create from a double array.<a name="line.112"></a> <FONT color="green">113</FONT> * Only non-zero entries will be stored<a name="line.113"></a> <FONT color="green">114</FONT> * @param values The set of values to create from<a name="line.114"></a> <FONT color="green">115</FONT> */<a name="line.115"></a> <FONT color="green">116</FONT> public OpenMapRealVector(double[] values) {<a name="line.116"></a> <FONT color="green">117</FONT> this(values, DEFAULT_ZERO_TOLERANCE);<a name="line.117"></a> <FONT color="green">118</FONT> }<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> * Create from a double array, specifying zero tolerance.<a name="line.121"></a> <FONT color="green">122</FONT> * Only non-zero entries will be stored<a name="line.122"></a> <FONT color="green">123</FONT> * @param values The set of values to create from<a name="line.123"></a> <FONT color="green">124</FONT> * @param epsilon The tolerance for having a value considered zero<a name="line.124"></a> <FONT color="green">125</FONT> */<a name="line.125"></a> <FONT color="green">126</FONT> public OpenMapRealVector(double[] values, double epsilon) {<a name="line.126"></a> <FONT color="green">127</FONT> virtualSize = values.length;<a name="line.127"></a> <FONT color="green">128</FONT> entries = new OpenIntToDoubleHashMap(0.0);<a name="line.128"></a> <FONT color="green">129</FONT> this.epsilon = epsilon;<a name="line.129"></a> <FONT color="green">130</FONT> for (int key = 0; key < values.length; key++) {<a name="line.130"></a> <FONT color="green">131</FONT> double value = values[key];<a name="line.131"></a> <FONT color="green">132</FONT> if (!isDefaultValue(value)) {<a name="line.132"></a> <FONT color="green">133</FONT> entries.put(key, value);<a name="line.133"></a> <FONT color="green">134</FONT> }<a name="line.134"></a> <FONT color="green">135</FONT> }<a name="line.135"></a> <FONT color="green">136</FONT> }<a name="line.136"></a> <FONT color="green">137</FONT> <a name="line.137"></a> <FONT color="green">138</FONT> /**<a name="line.138"></a> <FONT color="green">139</FONT> * Create from a Double array.<a name="line.139"></a> <FONT color="green">140</FONT> * Only non-zero entries will be stored<a name="line.140"></a> <FONT color="green">141</FONT> * @param values The set of values to create from<a name="line.141"></a> <FONT color="green">142</FONT> */<a name="line.142"></a> <FONT color="green">143</FONT> public OpenMapRealVector(Double[] values) {<a name="line.143"></a> <FONT color="green">144</FONT> this(values, DEFAULT_ZERO_TOLERANCE);<a name="line.144"></a> <FONT color="green">145</FONT> }<a name="line.145"></a> <FONT color="green">146</FONT> <a name="line.146"></a> <FONT color="green">147</FONT> /**<a name="line.147"></a> <FONT color="green">148</FONT> * Create from a Double array.<a name="line.148"></a> <FONT color="green">149</FONT> * Only non-zero entries will be stored<a name="line.149"></a> <FONT color="green">150</FONT> * @param values The set of values to create from<a name="line.150"></a> <FONT color="green">151</FONT> * @param epsilon The tolerance for having a value considered zero<a name="line.151"></a> <FONT color="green">152</FONT> */<a name="line.152"></a> <FONT color="green">153</FONT> public OpenMapRealVector(Double[] values, double epsilon) {<a name="line.153"></a> <FONT color="green">154</FONT> virtualSize = values.length;<a name="line.154"></a> <FONT color="green">155</FONT> entries = new OpenIntToDoubleHashMap(0.0);<a name="line.155"></a> <FONT color="green">156</FONT> this.epsilon = epsilon;<a name="line.156"></a> <FONT color="green">157</FONT> for (int key = 0; key < values.length; key++) {<a name="line.157"></a> <FONT color="green">158</FONT> double value = values[key].doubleValue();<a name="line.158"></a> <FONT color="green">159</FONT> if (!isDefaultValue(value)) {<a name="line.159"></a> <FONT color="green">160</FONT> entries.put(key, value);<a name="line.160"></a> <FONT color="green">161</FONT> }<a name="line.161"></a> <FONT color="green">162</FONT> }<a name="line.162"></a> <FONT color="green">163</FONT> }<a name="line.163"></a> <FONT color="green">164</FONT> <a name="line.164"></a> <FONT color="green">165</FONT> /**<a name="line.165"></a> <FONT color="green">166</FONT> * Copy constructor.<a name="line.166"></a> <FONT color="green">167</FONT> * @param v The instance to copy from<a name="line.167"></a> <FONT color="green">168</FONT> */<a name="line.168"></a> <FONT color="green">169</FONT> public OpenMapRealVector(OpenMapRealVector v) {<a name="line.169"></a> <FONT color="green">170</FONT> virtualSize = v.getDimension();<a name="line.170"></a> <FONT color="green">171</FONT> entries = new OpenIntToDoubleHashMap(v.getEntries());<a name="line.171"></a> <FONT color="green">172</FONT> epsilon = v.epsilon;<a name="line.172"></a> <FONT color="green">173</FONT> }<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> * Generic copy constructor.<a name="line.176"></a> <FONT color="green">177</FONT> * @param v The instance to copy from<a name="line.177"></a> <FONT color="green">178</FONT> */<a name="line.178"></a> <FONT color="green">179</FONT> public OpenMapRealVector(RealVector v) {<a name="line.179"></a> <FONT color="green">180</FONT> virtualSize = v.getDimension();<a name="line.180"></a> <FONT color="green">181</FONT> entries = new OpenIntToDoubleHashMap(0.0);<a name="line.181"></a> <FONT color="green">182</FONT> epsilon = DEFAULT_ZERO_TOLERANCE;<a name="line.182"></a> <FONT color="green">183</FONT> for (int key = 0; key < virtualSize; key++) {<a name="line.183"></a> <FONT color="green">184</FONT> double value = v.getEntry(key);<a name="line.184"></a> <FONT color="green">185</FONT> if (!isDefaultValue(value)) {<a name="line.185"></a> <FONT color="green">186</FONT> entries.put(key, value);<a name="line.186"></a> <FONT color="green">187</FONT> }<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> <a name="line.190"></a> <FONT color="green">191</FONT> /**<a name="line.191"></a> <FONT color="green">192</FONT> * Get the entries of this instance.<a name="line.192"></a> <FONT color="green">193</FONT> * @return entries of this instance<a name="line.193"></a> <FONT color="green">194</FONT> */<a name="line.194"></a> <FONT color="green">195</FONT> private OpenIntToDoubleHashMap getEntries() {<a name="line.195"></a> <FONT color="green">196</FONT> return entries;<a name="line.196"></a> <FONT color="green">197</FONT> }<a name="line.197"></a> <FONT color="green">198</FONT> <a name="line.198"></a> <FONT color="green">199</FONT> /**<a name="line.199"></a> <FONT color="green">200</FONT> * Determine if this value is within epsilon of zero.<a name="line.200"></a> <FONT color="green">201</FONT> * @param value The value to test<a name="line.201"></a> <FONT color="green">202</FONT> * @return <code>true</code> if this value is within epsilon to zero, <code>false</code> otherwise<a name="line.202"></a> <FONT color="green">203</FONT> * @since 2.1<a name="line.203"></a> <FONT color="green">204</FONT> */<a name="line.204"></a> <FONT color="green">205</FONT> protected boolean isDefaultValue(double value) {<a name="line.205"></a> <FONT color="green">206</FONT> return Math.abs(value) < epsilon;<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> /** {@inheritDoc} */<a name="line.209"></a> <FONT color="green">210</FONT> @Override<a name="line.210"></a> <FONT color="green">211</FONT> public RealVector add(RealVector v) throws IllegalArgumentException {<a name="line.211"></a> <FONT color="green">212</FONT> checkVectorDimensions(v.getDimension());<a name="line.212"></a> <FONT color="green">213</FONT> if (v instanceof OpenMapRealVector) {<a name="line.213"></a> <FONT color="green">214</FONT> return add((OpenMapRealVector) v);<a name="line.214"></a> <FONT color="green">215</FONT> } else {<a name="line.215"></a> <FONT color="green">216</FONT> return super.add(v);<a name="line.216"></a> <FONT color="green">217</FONT> }<a name="line.217"></a> <FONT color="green">218</FONT> }<a name="line.218"></a> <FONT color="green">219</FONT> <a name="line.219"></a> <FONT color="green">220</FONT> /**<a name="line.220"></a> <FONT color="green">221</FONT> * Optimized method to add two OpenMapRealVectors. Copies the larger vector, iterates over the smaller.<a name="line.221"></a> <FONT color="green">222</FONT> * @param v Vector to add with<a name="line.222"></a> <FONT color="green">223</FONT> * @return The sum of <code>this</code> with <code>v</code><a name="line.223"></a> <FONT color="green">224</FONT> * @throws IllegalArgumentException If the dimensions don't match<a name="line.224"></a> <FONT color="green">225</FONT> */<a name="line.225"></a> <FONT color="green">226</FONT> public OpenMapRealVector add(OpenMapRealVector v) throws IllegalArgumentException{<a name="line.226"></a> <FONT color="green">227</FONT> checkVectorDimensions(v.getDimension());<a name="line.227"></a> <FONT color="green">228</FONT> boolean copyThis = entries.size() > v.entries.size();<a name="line.228"></a> <FONT color="green">229</FONT> OpenMapRealVector res = copyThis ? this.copy() : v.copy();<a name="line.229"></a> <FONT color="green">230</FONT> Iterator iter = copyThis ? v.entries.iterator() : entries.iterator();<a name="line.230"></a> <FONT color="green">231</FONT> OpenIntToDoubleHashMap randomAccess = copyThis ? entries : v.entries;<a name="line.231"></a> <FONT color="green">232</FONT> while (iter.hasNext()) {<a name="line.232"></a> <FONT color="green">233</FONT> iter.advance();<a name="line.233"></a> <FONT color="green">234</FONT> int key = iter.key();<a name="line.234"></a> <FONT color="green">235</FONT> if (randomAccess.containsKey(key)) {<a name="line.235"></a> <FONT color="green">236</FONT> res.setEntry(key, randomAccess.get(key) + iter.value());<a name="line.236"></a> <FONT color="green">237</FONT> } else {<a name="line.237"></a> <FONT color="green">238</FONT> res.setEntry(key, iter.value());<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> return res;<a name="line.241"></a> <FONT color="green">242</FONT> }<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> * Optimized method to append a OpenMapRealVector.<a name="line.245"></a> <FONT color="green">246</FONT> * @param v vector to append<a name="line.246"></a> <FONT color="green">247</FONT> * @return The result of appending <code>v</code> to self<a name="line.247"></a> <FONT color="green">248</FONT> */<a name="line.248"></a> <FONT color="green">249</FONT> public OpenMapRealVector append(OpenMapRealVector v) {<a name="line.249"></a> <FONT color="green">250</FONT> OpenMapRealVector res = new OpenMapRealVector(this, v.getDimension());<a name="line.250"></a> <FONT color="green">251</FONT> Iterator iter = v.entries.iterator();<a name="line.251"></a> <FONT color="green">252</FONT> while (iter.hasNext()) {<a name="line.252"></a> <FONT color="green">253</FONT> iter.advance();<a name="line.253"></a> <FONT color="green">254</FONT> res.setEntry(iter.key() + virtualSize, iter.value());<a name="line.254"></a> <FONT color="green">255</FONT> }<a name="line.255"></a> <FONT color="green">256</FONT> return res;<a name="line.256"></a> <FONT color="green">257</FONT> }<a name="line.257"></a> <FONT color="green">258</FONT> <a name="line.258"></a> <FONT color="green">259</FONT> /** {@inheritDoc} */<a name="line.259"></a> <FONT color="green">260</FONT> public OpenMapRealVector append(RealVector v) {<a name="line.260"></a> <FONT color="green">261</FONT> if (v instanceof OpenMapRealVector) {<a name="line.261"></a> <FONT color="green">262</FONT> return append((OpenMapRealVector) v);<a name="line.262"></a> <FONT color="green">263</FONT> }<a name="line.263"></a> <FONT color="green">264</FONT> return append(v.getData());<a name="line.264"></a> <FONT color="green">265</FONT> }<a name="line.265"></a> <FONT color="green">266</FONT> <a name="line.266"></a> <FONT color="green">267</FONT> /** {@inheritDoc} */<a name="line.267"></a> <FONT color="green">268</FONT> public OpenMapRealVector append(double d) {<a name="line.268"></a> <FONT color="green">269</FONT> OpenMapRealVector res = new OpenMapRealVector(this, 1);<a name="line.269"></a> <FONT color="green">270</FONT> res.setEntry(virtualSize, d);<a name="line.270"></a> <FONT color="green">271</FONT> return res;<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> /** {@inheritDoc} */<a name="line.274"></a> <FONT color="green">275</FONT> public OpenMapRealVector append(double[] a) {<a name="line.275"></a> <FONT color="green">276</FONT> OpenMapRealVector res = new OpenMapRealVector(this, a.length);<a name="line.276"></a> <FONT color="green">277</FONT> for (int i = 0; i < a.length; i++) {<a name="line.277"></a> <FONT color="green">278</FONT> res.setEntry(i + virtualSize, a[i]);<a name="line.278"></a> <FONT color="green">279</FONT> }<a name="line.279"></a> <FONT color="green">280</FONT> return res;<a name="line.280"></a> <FONT color="green">281</FONT> }<a name="line.281"></a> <FONT color="green">282</FONT> <a name="line.282"></a> <FONT color="green">283</FONT> /**<a name="line.283"></a> <FONT color="green">284</FONT> * {@inheritDoc}<a name="line.284"></a> <FONT color="green">285</FONT> * @since 2.1<a name="line.285"></a> <FONT color="green">286</FONT> */<a name="line.286"></a> <FONT color="green">287</FONT> @Override<a name="line.287"></a> <FONT color="green">288</FONT> public OpenMapRealVector copy() {<a name="line.288"></a> <FONT color="green">289</FONT> return new OpenMapRealVector(this);<a name="line.289"></a> <FONT color="green">290</FONT> }<a name="line.290"></a> <FONT color="green">291</FONT> <a name="line.291"></a> <FONT color="green">292</FONT> /**<a name="line.292"></a> <FONT color="green">293</FONT> * Optimized method to compute the dot product with an OpenMapRealVector.<a name="line.293"></a> <FONT color="green">294</FONT> * Iterates over the smaller of the two.<a name="line.294"></a> <FONT color="green">295</FONT> * @param v The vector to compute the dot product with<a name="line.295"></a> <FONT color="green">296</FONT> * @return The dot product of <code>this</code> and <code>v</code><a name="line.296"></a> <FONT color="green">297</FONT> * @throws IllegalArgumentException If the dimensions don't match<a name="line.297"></a> <FONT color="green">298</FONT> */<a name="line.298"></a> <FONT color="green">299</FONT> public double dotProduct(OpenMapRealVector v) throws IllegalArgumentException {<a name="line.299"></a> <FONT color="green">300</FONT> checkVectorDimensions(v.getDimension());<a name="line.300"></a> <FONT color="green">301</FONT> boolean thisIsSmaller = entries.size() < v.entries.size();<a name="line.301"></a> <FONT color="green">302</FONT> Iterator iter = thisIsSmaller ? entries.iterator() : v.entries.iterator();<a name="line.302"></a> <FONT color="green">303</FONT> OpenIntToDoubleHashMap larger = thisIsSmaller ? v.entries : entries;<a name="line.303"></a> <FONT color="green">304</FONT> double d = 0;<a name="line.304"></a> <FONT color="green">305</FONT> while(iter.hasNext()) {<a name="line.305"></a> <FONT color="green">306</FONT> iter.advance();<a name="line.306"></a> <FONT color="green">307</FONT> d += iter.value() * larger.get(iter.key());<a name="line.307"></a> <FONT color="green">308</FONT> }<a name="line.308"></a> <FONT color="green">309</FONT> return d;<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> /** {@inheritDoc} */<a name="line.312"></a> <FONT color="green">313</FONT> @Override<a name="line.313"></a> <FONT color="green">314</FONT> public double dotProduct(RealVector v) throws IllegalArgumentException {<a name="line.314"></a> <FONT color="green">315</FONT> if(v instanceof OpenMapRealVector) {<a name="line.315"></a> <FONT color="green">316</FONT> return dotProduct((OpenMapRealVector)v);<a name="line.316"></a> <FONT color="green">317</FONT> } else {<a name="line.317"></a> <FONT color="green">318</FONT> return super.dotProduct(v);<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> <a name="line.321"></a> <FONT color="green">322</FONT> /** {@inheritDoc} */<a name="line.322"></a> <FONT color="green">323</FONT> public OpenMapRealVector ebeDivide(RealVector v) throws IllegalArgumentException {<a name="line.323"></a> <FONT color="green">324</FONT> checkVectorDimensions(v.getDimension());<a name="line.324"></a> <FONT color="green">325</FONT> OpenMapRealVector res = new OpenMapRealVector(this);<a name="line.325"></a> <FONT color="green">326</FONT> Iterator iter = res.entries.iterator();<a name="line.326"></a> <FONT color="green">327</FONT> while (iter.hasNext()) {<a name="line.327"></a> <FONT color="green">328</FONT> iter.advance();<a name="line.328"></a> <FONT color="green">329</FONT> res.setEntry(iter.key(), iter.value() / v.getEntry(iter.key()));<a name="line.329"></a> <FONT color="green">330</FONT> }<a name="line.330"></a> <FONT color="green">331</FONT> return res;<a name="line.331"></a> <FONT color="green">332</FONT> }<a name="line.332"></a> <FONT color="green">333</FONT> <a name="line.333"></a> <FONT color="green">334</FONT> /** {@inheritDoc} */<a name="line.334"></a> <FONT color="green">335</FONT> @Override<a name="line.335"></a> <FONT color="green">336</FONT> public OpenMapRealVector ebeDivide(double[] v) throws IllegalArgumentException {<a name="line.336"></a> <FONT color="green">337</FONT> checkVectorDimensions(v.length);<a name="line.337"></a> <FONT color="green">338</FONT> OpenMapRealVector res = new OpenMapRealVector(this);<a name="line.338"></a> <FONT color="green">339</FONT> Iterator iter = res.entries.iterator();<a name="line.339"></a> <FONT color="green">340</FONT> while (iter.hasNext()) {<a name="line.340"></a> <FONT color="green">341</FONT> iter.advance();<a name="line.341"></a> <FONT color="green">342</FONT> res.setEntry(iter.key(), iter.value() / v[iter.key()]);<a name="line.342"></a> <FONT color="green">343</FONT> }<a name="line.343"></a> <FONT color="green">344</FONT> return res;<a name="line.344"></a> <FONT color="green">345</FONT> }<a name="line.345"></a> <FONT color="green">346</FONT> <a name="line.346"></a> <FONT color="green">347</FONT> /** {@inheritDoc} */<a name="line.347"></a> <FONT color="green">348</FONT> public OpenMapRealVector ebeMultiply(RealVector v) throws IllegalArgumentException {<a name="line.348"></a> <FONT color="green">349</FONT> checkVectorDimensions(v.getDimension());<a name="line.349"></a> <FONT color="green">350</FONT> OpenMapRealVector res = new OpenMapRealVector(this);<a name="line.350"></a> <FONT color="green">351</FONT> Iterator iter = res.entries.iterator();<a name="line.351"></a> <FONT color="green">352</FONT> while (iter.hasNext()) {<a name="line.352"></a> <FONT color="green">353</FONT> iter.advance();<a name="line.353"></a> <FONT color="green">354</FONT> res.setEntry(iter.key(), iter.value() * v.getEntry(iter.key()));<a name="line.354"></a> <FONT color="green">355</FONT> }<a name="line.355"></a> <FONT color="green">356</FONT> return res;<a name="line.356"></a> <FONT color="green">357</FONT> }<a name="line.357"></a> <FONT color="green">358</FONT> <a name="line.358"></a> <FONT color="green">359</FONT> /** {@inheritDoc} */<a name="line.359"></a> <FONT color="green">360</FONT> @Override<a name="line.360"></a> <FONT color="green">361</FONT> public OpenMapRealVector ebeMultiply(double[] v) throws IllegalArgumentException {<a name="line.361"></a> <FONT color="green">362</FONT> checkVectorDimensions(v.length);<a name="line.362"></a> <FONT color="green">363</FONT> OpenMapRealVector res = new OpenMapRealVector(this);<a name="line.363"></a> <FONT color="green">364</FONT> Iterator iter = res.entries.iterator();<a name="line.364"></a> <FONT color="green">365</FONT> while (iter.hasNext()) {<a name="line.365"></a> <FONT color="green">366</FONT> iter.advance();<a name="line.366"></a> <FONT color="green">367</FONT> res.setEntry(iter.key(), iter.value() * v[iter.key()]);<a name="line.367"></a> <FONT color="green">368</FONT> }<a name="line.368"></a> <FONT color="green">369</FONT> return res;<a name="line.369"></a> <FONT color="green">370</FONT> }<a name="line.370"></a> <FONT color="green">371</FONT> <a name="line.371"></a> <FONT color="green">372</FONT> /** {@inheritDoc} */<a name="line.372"></a> <FONT color="green">373</FONT> public OpenMapRealVector getSubVector(int index, int n) throws MatrixIndexException {<a name="line.373"></a> <FONT color="green">374</FONT> checkIndex(index);<a name="line.374"></a> <FONT color="green">375</FONT> checkIndex(index + n - 1);<a name="line.375"></a> <FONT color="green">376</FONT> OpenMapRealVector res = new OpenMapRealVector(n);<a name="line.376"></a> <FONT color="green">377</FONT> int end = index + n;<a name="line.377"></a> <FONT color="green">378</FONT> Iterator iter = entries.iterator();<a name="line.378"></a> <FONT color="green">379</FONT> while (iter.hasNext()) {<a name="line.379"></a> <FONT color="green">380</FONT> iter.advance();<a name="line.380"></a> <FONT color="green">381</FONT> int key = iter.key();<a name="line.381"></a> <FONT color="green">382</FONT> if (key >= index && key < end) {<a name="line.382"></a> <FONT color="green">383</FONT> res.setEntry(key - index, iter.value());<a name="line.383"></a> <FONT color="green">384</FONT> }<a name="line.384"></a> <FONT color="green">385</FONT> }<a name="line.385"></a> <FONT color="green">386</FONT> return res;<a name="line.386"></a> <FONT color="green">387</FONT> }<a name="line.387"></a> <FONT color="green">388</FONT> <a name="line.388"></a> <FONT color="green">389</FONT> /** {@inheritDoc} */<a name="line.389"></a> <FONT color="green">390</FONT> @Override<a name="line.390"></a> <FONT color="green">391</FONT> public double[] getData() {<a name="line.391"></a> <FONT color="green">392</FONT> double[] res = new double[virtualSize];<a name="line.392"></a> <FONT color="green">393</FONT> Iterator iter = entries.iterator();<a name="line.393"></a> <FONT color="green">394</FONT> while (iter.hasNext()) {<a name="line.394"></a> <FONT color="green">395</FONT> iter.advance();<a name="line.395"></a> <FONT color="green">396</FONT> res[iter.key()] = iter.value();<a name="line.396"></a> <FONT color="green">397</FONT> }<a name="line.397"></a> <FONT color="green">398</FONT> return res;<a name="line.398"></a> <FONT color="green">399</FONT> }<a name="line.399"></a> <FONT color="green">400</FONT> <a name="line.400"></a> <FONT color="green">401</FONT> /** {@inheritDoc} */<a name="line.401"></a> <FONT color="green">402</FONT> public int getDimension() {<a name="line.402"></a> <FONT color="green">403</FONT> return virtualSize;<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> * Optimized method to compute distance.<a name="line.407"></a> <FONT color="green">408</FONT> * @param v The vector to compute distance to<a name="line.408"></a> <FONT color="green">409</FONT> * @return The distance from <code>this</code> and <code>v</code><a name="line.409"></a> <FONT color="green">410</FONT> * @throws IllegalArgumentException If the dimensions don't match<a name="line.410"></a> <FONT color="green">411</FONT> */<a name="line.411"></a> <FONT color="green">412</FONT> public double getDistance(OpenMapRealVector v) throws IllegalArgumentException {<a name="line.412"></a> <FONT color="green">413</FONT> Iterator iter = entries.iterator();<a name="line.413"></a> <FONT color="green">414</FONT> double res = 0;<a name="line.414"></a> <FONT color="green">415</FONT> while (iter.hasNext()) {<a name="line.415"></a> <FONT color="green">416</FONT> iter.advance();<a name="line.416"></a> <FONT color="green">417</FONT> int key = iter.key();<a name="line.417"></a> <FONT color="green">418</FONT> double delta;<a name="line.418"></a> <FONT color="green">419</FONT> delta = iter.value() - v.getEntry(key);<a name="line.419"></a> <FONT color="green">420</FONT> res += delta * delta;<a name="line.420"></a> <FONT color="green">421</FONT> }<a name="line.421"></a> <FONT color="green">422</FONT> iter = v.getEntries().iterator();<a name="line.422"></a> <FONT color="green">423</FONT> while (iter.hasNext()) {<a name="line.423"></a> <FONT color="green">424</FONT> iter.advance();<a name="line.424"></a> <FONT color="green">425</FONT> int key = iter.key();<a name="line.425"></a> <FONT color="green">426</FONT> if (!entries.containsKey(key)) {<a name="line.426"></a> <FONT color="green">427</FONT> final double value = iter.value();<a name="line.427"></a> <FONT color="green">428</FONT> res += value * value;<a name="line.428"></a> <FONT color="green">429</FONT> }<a name="line.429"></a> <FONT color="green">430</FONT> }<a name="line.430"></a> <FONT color="green">431</FONT> return Math.sqrt(res);<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> /** {@inheritDoc} */<a name="line.434"></a> <FONT color="green">435</FONT> @Override<a name="line.435"></a> <FONT color="green">436</FONT> public double getDistance(RealVector v) throws IllegalArgumentException {<a name="line.436"></a> <FONT color="green">437</FONT> checkVectorDimensions(v.getDimension());<a name="line.437"></a> <FONT color="green">438</FONT> if (v instanceof OpenMapRealVector) {<a name="line.438"></a> <FONT color="green">439</FONT> return getDistance((OpenMapRealVector) v);<a name="line.439"></a> <FONT color="green">440</FONT> }<a name="line.440"></a> <FONT color="green">441</FONT> return getDistance(v.getData());<a name="line.441"></a> <FONT color="green">442</FONT> }<a name="line.442"></a> <FONT color="green">443</FONT> <a name="line.443"></a> <FONT color="green">444</FONT> /** {@inheritDoc} */<a name="line.444"></a> <FONT color="green">445</FONT> @Override<a name="line.445"></a> <FONT color="green">446</FONT> public double getDistance(double[] v) throws IllegalArgumentException {<a name="line.446"></a> <FONT color="green">447</FONT> checkVectorDimensions(v.length);<a name="line.447"></a> <FONT color="green">448</FONT> double res = 0;<a name="line.448"></a> <FONT color="green">449</FONT> for (int i = 0; i < v.length; i++) {<a name="line.449"></a> <FONT color="green">450</FONT> double delta = entries.get(i) - v[i];<a name="line.450"></a> <FONT color="green">451</FONT> res += delta * delta;<a name="line.451"></a> <FONT color="green">452</FONT> }<a name="line.452"></a> <FONT color="green">453</FONT> return Math.sqrt(res);<a name="line.453"></a> <FONT color="green">454</FONT> }<a name="line.454"></a> <FONT color="green">455</FONT> <a name="line.455"></a> <FONT color="green">456</FONT> /** {@inheritDoc} */<a name="line.456"></a> <FONT color="green">457</FONT> public double getEntry(int index) throws MatrixIndexException {<a name="line.457"></a> <FONT color="green">458</FONT> checkIndex(index);<a name="line.458"></a> <FONT color="green">459</FONT> return entries.get(index);<a name="line.459"></a> <FONT color="green">460</FONT> }<a name="line.460"></a> <FONT color="green">461</FONT> <a name="line.461"></a> <FONT color="green">462</FONT> /**<a name="line.462"></a> <FONT color="green">463</FONT> * Distance between two vectors.<a name="line.463"></a> <FONT color="green">464</FONT> * <p>This method computes the distance consistent with<a name="line.464"></a> <FONT color="green">465</FONT> * L<sub>1</sub> norm, i.e. the sum of the absolute values of<a name="line.465"></a> <FONT color="green">466</FONT> * elements differences.</p><a name="line.466"></a> <FONT color="green">467</FONT> * @param v vector to which distance is requested<a name="line.467"></a> <FONT color="green">468</FONT> * @return distance between two vectors.<a name="line.468"></a> <FONT color="green">469</FONT> */<a name="line.469"></a> <FONT color="green">470</FONT> public double getL1Distance(OpenMapRealVector v) {<a name="line.470"></a> <FONT color="green">471</FONT> double max = 0;<a name="line.471"></a> <FONT color="green">472</FONT> Iterator iter = entries.iterator();<a name="line.472"></a> <FONT color="green">473</FONT> while (iter.hasNext()) {<a name="line.473"></a> <FONT color="green">474</FONT> iter.advance();<a name="line.474"></a> <FONT color="green">475</FONT> double delta = Math.abs(iter.value() - v.getEntry(iter.key()));<a name="line.475"></a> <FONT color="green">476</FONT> max += delta;<a name="line.476"></a> <FONT color="green">477</FONT> }<a name="line.477"></a> <FONT color="green">478</FONT> iter = v.getEntries().iterator();<a name="line.478"></a> <FONT color="green">479</FONT> while (iter.hasNext()) {<a name="line.479"></a> <FONT color="green">480</FONT> iter.advance();<a name="line.480"></a> <FONT color="green">481</FONT> int key = iter.key();<a name="line.481"></a> <FONT color="green">482</FONT> if (!entries.containsKey(key)) {<a name="line.482"></a> <FONT color="green">483</FONT> double delta = Math.abs(iter.value());<a name="line.483"></a> <FONT color="green">484</FONT> max += Math.abs(delta);<a name="line.484"></a> <FONT color="green">485</FONT> }<a name="line.485"></a> <FONT color="green">486</FONT> }<a name="line.486"></a> <FONT color="green">487</FONT> return max;<a name="line.487"></a> <FONT color="green">488</FONT> }<a name="line.488"></a> <FONT color="green">489</FONT> <a name="line.489"></a> <FONT color="green">490</FONT> /** {@inheritDoc} */<a name="line.490"></a> <FONT color="green">491</FONT> @Override<a name="line.491"></a> <FONT color="green">492</FONT> public double getL1Distance(RealVector v) throws IllegalArgumentException {<a name="line.492"></a> <FONT color="green">493</FONT> checkVectorDimensions(v.getDimension());<a name="line.493"></a> <FONT color="green">494</FONT> if (v instanceof OpenMapRealVector) {<a name="line.494"></a> <FONT color="green">495</FONT> return getL1Distance((OpenMapRealVector) v);<a name="line.495"></a> <FONT color="green">496</FONT> }<a name="line.496"></a> <FONT color="green">497</FONT> return getL1Distance(v.getData());<a name="line.497"></a> <FONT color="green">498</FONT> }<a name="line.498"></a> <FONT color="green">499</FONT> <a name="line.499"></a> <FONT color="green">500</FONT> /** {@inheritDoc} */<a name="line.500"></a> <FONT color="green">501</FONT> @Override<a name="line.501"></a> <FONT color="green">502</FONT> public double getL1Distance(double[] v) throws IllegalArgumentException {<a name="line.502"></a> <FONT color="green">503</FONT> checkVectorDimensions(v.length);<a name="line.503"></a> <FONT color="green">504</FONT> double max = 0;<a name="line.504"></a> <FONT color="green">505</FONT> for (int i = 0; i < v.length; i++) {<a name="line.505"></a> <FONT color="green">506</FONT> double delta = Math.abs(getEntry(i) - v[i]);<a name="line.506"></a> <FONT color="green">507</FONT> max += delta;<a name="line.507"></a> <FONT color="green">508</FONT> }<a name="line.508"></a> <FONT color="green">509</FONT> return max;<a name="line.509"></a> <FONT color="green">510</FONT> }<a name="line.510"></a> <FONT color="green">511</FONT> <a name="line.511"></a> <FONT color="green">512</FONT> /**<a name="line.512"></a> <FONT color="green">513</FONT> * Optimized method to compute LInfDistance.<a name="line.513"></a> <FONT color="green">514</FONT> * @param v The vector to compute from<a name="line.514"></a> <FONT color="green">515</FONT> * @return the LInfDistance<a name="line.515"></a> <FONT color="green">516</FONT> */<a name="line.516"></a> <FONT color="green">517</FONT> private double getLInfDistance(OpenMapRealVector v) {<a name="line.517"></a> <FONT color="green">518</FONT> double max = 0;<a name="line.518"></a> <FONT color="green">519</FONT> Iterator iter = entries.iterator();<a name="line.519"></a> <FONT color="green">520</FONT> while (iter.hasNext()) {<a name="line.520"></a> <FONT color="green">521</FONT> iter.advance();<a name="line.521"></a> <FONT color="green">522</FONT> double delta = Math.abs(iter.value() - v.getEntry(iter.key()));<a name="line.522"></a> <FONT color="green">523</FONT> if (delta > max) {<a name="line.523"></a> <FONT color="green">524</FONT> max = delta;<a name="line.524"></a> <FONT color="green">525</FONT> }<a name="line.525"></a> <FONT color="green">526</FONT> }<a name="line.526"></a> <FONT color="green">527</FONT> iter = v.getEntries().iterator();<a name="line.527"></a> <FONT color="green">528</FONT> while (iter.hasNext()) {<a name="line.528"></a> <FONT color="green">529</FONT> iter.advance();<a name="line.529"></a> <FONT color="green">530</FONT> int key = iter.key();<a name="line.530"></a> <FONT color="green">531</FONT> if (!entries.containsKey(key)) {<a name="line.531"></a> <FONT color="green">532</FONT> if (iter.value() > max) {<a name="line.532"></a> <FONT color="green">533</FONT> max = iter.value();<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> }<a name="line.536"></a> <FONT color="green">537</FONT> return max;<a name="line.537"></a> <FONT color="green">538</FONT> }<a name="line.538"></a> <FONT color="green">539</FONT> <a name="line.539"></a> <FONT color="green">540</FONT> /** {@inheritDoc} */<a name="line.540"></a> <FONT color="green">541</FONT> @Override<a name="line.541"></a> <FONT color="green">542</FONT> public double getLInfDistance(RealVector v) throws IllegalArgumentException {<a name="line.542"></a> <FONT color="green">543</FONT> checkVectorDimensions(v.getDimension());<a name="line.543"></a> <FONT color="green">544</FONT> if (v instanceof OpenMapRealVector) {<a name="line.544"></a> <FONT color="green">545</FONT> return getLInfDistance((OpenMapRealVector) v);<a name="line.545"></a> <FONT color="green">546</FONT> }<a name="line.546"></a> <FONT color="green">547</FONT> return getLInfDistance(v.getData());<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> /** {@inheritDoc} */<a name="line.550"></a> <FONT color="green">551</FONT> @Override<a name="line.551"></a> <FONT color="green">552</FONT> public double getLInfDistance(double[] v) throws IllegalArgumentException {<a name="line.552"></a> <FONT color="green">553</FONT> checkVectorDimensions(v.length);<a name="line.553"></a> <FONT color="green">554</FONT> double max = 0;<a name="line.554"></a> <FONT color="green">555</FONT> for (int i = 0; i < v.length; i++) {<a name="line.555"></a> <FONT color="green">556</FONT> double delta = Math.abs(getEntry(i) - v[i]);<a name="line.556"></a> <FONT color="green">557</FONT> if (delta > max) {<a name="line.557"></a> <FONT color="green">558</FONT> max = delta;<a name="line.558"></a> <FONT color="green">559</FONT> }<a name="line.559"></a> <FONT color="green">560</FONT> }<a name="line.560"></a> <FONT color="green">561</FONT> return max;<a name="line.561"></a> <FONT color="green">562</FONT> }<a name="line.562"></a> <FONT color="green">563</FONT> <a name="line.563"></a> <FONT color="green">564</FONT> /** {@inheritDoc} */<a name="line.564"></a> <FONT color="green">565</FONT> public boolean isInfinite() {<a name="line.565"></a> <FONT color="green">566</FONT> boolean infiniteFound = false;<a name="line.566"></a> <FONT color="green">567</FONT> Iterator iter = entries.iterator();<a name="line.567"></a> <FONT color="green">568</FONT> while (iter.hasNext()) {<a name="line.568"></a> <FONT color="green">569</FONT> iter.advance();<a name="line.569"></a> <FONT color="green">570</FONT> final double value = iter.value();<a name="line.570"></a> <FONT color="green">571</FONT> if (Double.isNaN(value)) {<a name="line.571"></a> <FONT color="green">572</FONT> return false;<a name="line.572"></a> <FONT color="green">573</FONT> }<a name="line.573"></a> <FONT color="green">574</FONT> if (Double.isInfinite(value)) {<a name="line.574"></a> <FONT color="green">575</FONT> infiniteFound = true;<a name="line.575"></a> <FONT color="green">576</FONT> }<a name="line.576"></a> <FONT color="green">577</FONT> }<a name="line.577"></a> <FONT color="green">578</FONT> return infiniteFound;<a name="line.578"></a> <FONT color="green">579</FONT> }<a name="line.579"></a> <FONT color="green">580</FONT> <a name="line.580"></a> <FONT color="green">581</FONT> /** {@inheritDoc} */<a name="line.581"></a> <FONT color="green">582</FONT> public boolean isNaN() {<a name="line.582"></a> <FONT color="green">583</FONT> Iterator iter = entries.iterator();<a name="line.583"></a> <FONT color="green">584</FONT> while (iter.hasNext()) {<a name="line.584"></a> <FONT color="green">585</FONT> iter.advance();<a name="line.585"></a> <FONT color="green">586</FONT> if (Double.isNaN(iter.value())) {<a name="line.586"></a> <FONT color="green">587</FONT> return true;<a name="line.587"></a> <FONT color="green">588</FONT> }<a name="line.588"></a> <FONT color="green">589</FONT> }<a name="line.589"></a> <FONT color="green">590</FONT> return false;<a name="line.590"></a> <FONT color="green">591</FONT> }<a name="line.591"></a> <FONT color="green">592</FONT> <a name="line.592"></a> <FONT color="green">593</FONT> /** {@inheritDoc} */<a name="line.593"></a> <FONT color="green">594</FONT> @Override<a name="line.594"></a> <FONT color="green">595</FONT> public OpenMapRealVector mapAdd(double d) {<a name="line.595"></a> <FONT color="green">596</FONT> return copy().mapAddToSelf(d);<a name="line.596"></a> <FONT color="green">597</FONT> }<a name="line.597"></a> <FONT color="green">598</FONT> <a name="line.598"></a> <FONT color="green">599</FONT> /** {@inheritDoc} */<a name="line.599"></a> <FONT color="green">600</FONT> @Override<a name="line.600"></a> <FONT color="green">601</FONT> public OpenMapRealVector mapAddToSelf(double d) {<a name="line.601"></a> <FONT color="green">602</FONT> for (int i = 0; i < virtualSize; i++) {<a name="line.602"></a> <FONT color="green">603</FONT> setEntry(i, getEntry(i) + d);<a name="line.603"></a> <FONT color="green">604</FONT> }<a name="line.604"></a> <FONT color="green">605</FONT> return this;<a name="line.605"></a> <FONT color="green">606</FONT> }<a name="line.606"></a> <FONT color="green">607</FONT> <a name="line.607"></a> <FONT color="green">608</FONT> /** {@inheritDoc} */<a name="line.608"></a> <FONT color="green">609</FONT> @Override<a name="line.609"></a> <FONT color="green">610</FONT> public RealMatrix outerProduct(double[] v) throws IllegalArgumentException {<a name="line.610"></a> <FONT color="green">611</FONT> checkVectorDimensions(v.length);<a name="line.611"></a> <FONT color="green">612</FONT> RealMatrix res = new OpenMapRealMatrix(virtualSize, virtualSize);<a name="line.612"></a> <FONT color="green">613</FONT> Iterator iter = entries.iterator();<a name="line.613"></a> <FONT color="green">614</FONT> while (iter.hasNext()) {<a name="line.614"></a> <FONT color="green">615</FONT> iter.advance();<a name="line.615"></a> <FONT color="green">616</FONT> int row = iter.key();<a name="line.616"></a> <FONT color="green">617</FONT> double value = iter.value();<a name="line.617"></a> <FONT color="green">618</FONT> for (int col = 0; col < virtualSize; col++) {<a name="line.618"></a> <FONT color="green">619</FONT> res.setEntry(row, col, value * v[col]);<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> return res;<a name="line.622"></a> <FONT color="green">623</FONT> }<a name="line.623"></a> <FONT color="green">624</FONT> <a name="line.624"></a> <FONT color="green">625</FONT> /** {@inheritDoc} */<a name="line.625"></a> <FONT color="green">626</FONT> public RealVector projection(RealVector v) throws IllegalArgumentException {<a name="line.626"></a> <FONT color="green">627</FONT> checkVectorDimensions(v.getDimension());<a name="line.627"></a> <FONT color="green">628</FONT> return v.mapMultiply(dotProduct(v) / v.dotProduct(v));<a name="line.628"></a> <FONT color="green">629</FONT> }<a name="line.629"></a> <FONT color="green">630</FONT> <a name="line.630"></a> <FONT color="green">631</FONT> /** {@inheritDoc} */<a name="line.631"></a> <FONT color="green">632</FONT> @Override<a name="line.632"></a> <FONT color="green">633</FONT> public OpenMapRealVector projection(double[] v) throws IllegalArgumentException {<a name="line.633"></a> <FONT color="green">634</FONT> checkVectorDimensions(v.length);<a name="line.634"></a> <FONT color="green">635</FONT> return (OpenMapRealVector) projection(new OpenMapRealVector(v));<a name="line.635"></a> <FONT color="green">636</FONT> }<a name="line.636"></a> <FONT color="green">637</FONT> <a name="line.637"></a> <FONT color="green">638</FONT> /** {@inheritDoc} */<a name="line.638"></a> <FONT color="green">639</FONT> public void setEntry(int index, double value) throws MatrixIndexException {<a name="line.639"></a> <FONT color="green">640</FONT> checkIndex(index);<a name="line.640"></a> <FONT color="green">641</FONT> if (!isDefaultValue(value)) {<a name="line.641"></a> <FONT color="green">642</FONT> entries.put(index, value);<a name="line.642"></a> <FONT color="green">643</FONT> } else if (entries.containsKey(index)) {<a name="line.643"></a> <FONT color="green">644</FONT> entries.remove(index);<a name="line.644"></a> <FONT color="green">645</FONT> }<a name="line.645"></a> <FONT color="green">646</FONT> }<a name="line.646"></a> <FONT color="green">647</FONT> <a name="line.647"></a> <FONT color="green">648</FONT> /** {@inheritDoc} */<a name="line.648"></a> <FONT color="green">649</FONT> @Override<a name="line.649"></a> <FONT color="green">650</FONT> public void setSubVector(int index, RealVector v) throws MatrixIndexException {<a name="line.650"></a> <FONT color="green">651</FONT> checkIndex(index);<a name="line.651"></a> <FONT color="green">652</FONT> checkIndex(index + v.getDimension() - 1);<a name="line.652"></a> <FONT color="green">653</FONT> setSubVector(index, v.getData());<a name="line.653"></a> <FONT color="green">654</FONT> }<a name="line.654"></a> <FONT color="green">655</FONT> <a name="line.655"></a> <FONT color="green">656</FONT> /** {@inheritDoc} */<a name="line.656"></a> <FONT color="green">657</FONT> @Override<a name="line.657"></a> <FONT color="green">658</FONT> public void setSubVector(int index, double[] v) throws MatrixIndexException {<a name="line.658"></a> <FONT color="green">659</FONT> checkIndex(index);<a name="line.659"></a> <FONT color="green">660</FONT> checkIndex(index + v.length - 1);<a name="line.660"></a> <FONT color="green">661</FONT> for (int i = 0; i < v.length; i++) {<a name="line.661"></a> <FONT color="green">662</FONT> setEntry(i + index, v[i]);<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> <a name="line.665"></a> <FONT color="green">666</FONT> /** {@inheritDoc} */<a name="line.666"></a> <FONT color="green">667</FONT> @Override<a name="line.667"></a> <FONT color="green">668</FONT> public void set(double value) {<a name="line.668"></a> <FONT color="green">669</FONT> for (int i = 0; i < virtualSize; i++) {<a name="line.669"></a> <FONT color="green">670</FONT> setEntry(i, value);<a name="line.670"></a> <FONT color="green">671</FONT> }<a name="line.671"></a> <FONT color="green">672</FONT> }<a name="line.672"></a> <FONT color="green">673</FONT> <a name="line.673"></a> <FONT color="green">674</FONT> /**<a name="line.674"></a> <FONT color="green">675</FONT> * Optimized method to subtract OpenMapRealVectors.<a name="line.675"></a> <FONT color="green">676</FONT> * @param v The vector to subtract from <code>this</code><a name="line.676"></a> <FONT color="green">677</FONT> * @return The difference of <code>this</code> and <code>v</code><a name="line.677"></a> <FONT color="green">678</FONT> * @throws IllegalArgumentException If the dimensions don't match<a name="line.678"></a> <FONT color="green">679</FONT> */<a name="line.679"></a> <FONT color="green">680</FONT> public OpenMapRealVector subtract(OpenMapRealVector v) throws IllegalArgumentException{<a name="line.680"></a> <FONT color="green">681</FONT> checkVectorDimensions(v.getDimension());<a name="line.681"></a> <FONT color="green">682</FONT> OpenMapRealVector res = copy();<a name="line.682"></a> <FONT color="green">683</FONT> Iterator iter = v.getEntries().iterator();<a name="line.683"></a> <FONT color="green">684</FONT> while (iter.hasNext()) {<a name="line.684"></a> <FONT color="green">685</FONT> iter.advance();<a name="line.685"></a> <FONT color="green">686</FONT> int key = iter.key();<a name="line.686"></a> <FONT color="green">687</FONT> if (entries.containsKey(key)) {<a name="line.687"></a> <FONT color="green">688</FONT> res.setEntry(key, entries.get(key) - iter.value());<a name="line.688"></a> <FONT color="green">689</FONT> } else {<a name="line.689"></a> <FONT color="green">690</FONT> res.setEntry(key, -iter.value());<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> return res;<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> /** {@inheritDoc} */<a name="line.696"></a> <FONT color="green">697</FONT> @Override<a name="line.697"></a> <FONT color="green">698</FONT> public OpenMapRealVector subtract(RealVector v) throws IllegalArgumentException {<a name="line.698"></a> <FONT color="green">699</FONT> checkVectorDimensions(v.getDimension());<a name="line.699"></a> <FONT color="green">700</FONT> if (v instanceof OpenMapRealVector) {<a name="line.700"></a> <FONT color="green">701</FONT> return subtract((OpenMapRealVector) v);<a name="line.701"></a> <FONT color="green">702</FONT> }<a name="line.702"></a> <FONT color="green">703</FONT> return subtract(v.getData());<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> /** {@inheritDoc} */<a name="line.706"></a> <FONT color="green">707</FONT> @Override<a name="line.707"></a> <FONT color="green">708</FONT> public OpenMapRealVector subtract(double[] v) throws IllegalArgumentException {<a name="line.708"></a> <FONT color="green">709</FONT> checkVectorDimensions(v.length);<a name="line.709"></a> <FONT color="green">710</FONT> OpenMapRealVector res = new OpenMapRealVector(this);<a name="line.710"></a> <FONT color="green">711</FONT> for (int i = 0; i < v.length; i++) {<a name="line.711"></a> <FONT color="green">712</FONT> if (entries.containsKey(i)) {<a name="line.712"></a> <FONT color="green">713</FONT> res.setEntry(i, entries.get(i) - v[i]);<a name="line.713"></a> <FONT color="green">714</FONT> } else {<a name="line.714"></a> <FONT color="green">715</FONT> res.setEntry(i, -v[i]);<a name="line.715"></a> <FONT color="green">716</FONT> }<a name="line.716"></a> <FONT color="green">717</FONT> }<a name="line.717"></a> <FONT color="green">718</FONT> return res;<a name="line.718"></a> <FONT color="green">719</FONT> }<a name="line.719"></a> <FONT color="green">720</FONT> <a name="line.720"></a> <FONT color="green">721</FONT> <a name="line.721"></a> <FONT color="green">722</FONT> /** {@inheritDoc} */<a name="line.722"></a> <FONT color="green">723</FONT> @Override<a name="line.723"></a> <FONT color="green">724</FONT> public OpenMapRealVector unitVector() {<a name="line.724"></a> <FONT color="green">725</FONT> OpenMapRealVector res = copy();<a name="line.725"></a> <FONT color="green">726</FONT> res.unitize();<a name="line.726"></a> <FONT color="green">727</FONT> return res;<a name="line.727"></a> <FONT color="green">728</FONT> }<a name="line.728"></a> <FONT color="green">729</FONT> <a name="line.729"></a> <FONT color="green">730</FONT> /** {@inheritDoc} */<a name="line.730"></a> <FONT color="green">731</FONT> @Override<a name="line.731"></a> <FONT color="green">732</FONT> public void unitize() {<a name="line.732"></a> <FONT color="green">733</FONT> double norm = getNorm();<a name="line.733"></a> <FONT color="green">734</FONT> if (isDefaultValue(norm)) {<a name="line.734"></a> <FONT color="green">735</FONT> throw MathRuntimeException.createArithmeticException("cannot normalize a zero norm vector");<a name="line.735"></a> <FONT color="green">736</FONT> }<a name="line.736"></a> <FONT color="green">737</FONT> Iterator iter = entries.iterator();<a name="line.737"></a> <FONT color="green">738</FONT> while (iter.hasNext()) {<a name="line.738"></a> <FONT color="green">739</FONT> iter.advance();<a name="line.739"></a> <FONT color="green">740</FONT> entries.put(iter.key(), iter.value() / norm);<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> <a name="line.744"></a> <FONT color="green">745</FONT> <a name="line.745"></a> <FONT color="green">746</FONT> /** {@inheritDoc} */<a name="line.746"></a> <FONT color="green">747</FONT> @Override<a name="line.747"></a> <FONT color="green">748</FONT> public double[] toArray() {<a name="line.748"></a> <FONT color="green">749</FONT> return getData();<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> /** {@inheritDoc}<a name="line.752"></a> <FONT color="green">753</FONT> * <p> Implementation Note: This works on exact values, and as a result<a name="line.753"></a> <FONT color="green">754</FONT> * it is possible for {@code a.subtract(b)} to be the zero vector, while<a name="line.754"></a> <FONT color="green">755</FONT> * {@code a.hashCode() != b.hashCode()}.</p><a name="line.755"></a> <FONT color="green">756</FONT> */<a name="line.756"></a> <FONT color="green">757</FONT> @Override<a name="line.757"></a> <FONT color="green">758</FONT> public int hashCode() {<a name="line.758"></a> <FONT color="green">759</FONT> final int prime = 31;<a name="line.759"></a> <FONT color="green">760</FONT> int result = 1;<a name="line.760"></a> <FONT color="green">761</FONT> long temp;<a name="line.761"></a> <FONT color="green">762</FONT> temp = Double.doubleToLongBits(epsilon);<a name="line.762"></a> <FONT color="green">763</FONT> result = prime * result + (int) (temp ^ (temp >>> 32));<a name="line.763"></a> <FONT color="green">764</FONT> result = prime * result + virtualSize;<a name="line.764"></a> <FONT color="green">765</FONT> Iterator iter = entries.iterator();<a name="line.765"></a> <FONT color="green">766</FONT> while (iter.hasNext()) {<a name="line.766"></a> <FONT color="green">767</FONT> iter.advance();<a name="line.767"></a> <FONT color="green">768</FONT> temp = Double.doubleToLongBits(iter.value());<a name="line.768"></a> <FONT color="green">769</FONT> result = prime * result + (int) (temp ^ (temp >>32));<a name="line.769"></a> <FONT color="green">770</FONT> }<a name="line.770"></a> <FONT color="green">771</FONT> return result;<a name="line.771"></a> <FONT color="green">772</FONT> }<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> * <p> Implementation Note: This performs an exact comparison, and as a result<a name="line.775"></a> <FONT color="green">776</FONT> * it is possible for {@code a.subtract(b}} to be the zero vector, while<a name="line.776"></a> <FONT color="green">777</FONT> * {@code a.equals(b) == false}.</p><a name="line.777"></a> <FONT color="green">778</FONT> * {@inheritDoc}<a name="line.778"></a> <FONT color="green">779</FONT> */<a name="line.779"></a> <FONT color="green">780</FONT> @Override<a name="line.780"></a> <FONT color="green">781</FONT> public boolean equals(Object obj) {<a name="line.781"></a> <FONT color="green">782</FONT> if (this == obj) {<a name="line.782"></a> <FONT color="green">783</FONT> return true;<a name="line.783"></a> <FONT color="green">784</FONT> }<a name="line.784"></a> <FONT color="green">785</FONT> if (!(obj instanceof OpenMapRealVector)) {<a name="line.785"></a> <FONT color="green">786</FONT> return false;<a name="line.786"></a> <FONT color="green">787</FONT> }<a name="line.787"></a> <FONT color="green">788</FONT> OpenMapRealVector other = (OpenMapRealVector) obj;<a name="line.788"></a> <FONT color="green">789</FONT> if (virtualSize != other.virtualSize) {<a name="line.789"></a> <FONT color="green">790</FONT> return false;<a name="line.790"></a> <FONT color="green">791</FONT> }<a name="line.791"></a> <FONT color="green">792</FONT> if (Double.doubleToLongBits(epsilon) !=<a name="line.792"></a> <FONT color="green">793</FONT> Double.doubleToLongBits(other.epsilon)) {<a name="line.793"></a> <FONT color="green">794</FONT> return false;<a name="line.794"></a> <FONT color="green">795</FONT> }<a name="line.795"></a> <FONT color="green">796</FONT> Iterator iter = entries.iterator();<a name="line.796"></a> <FONT color="green">797</FONT> while (iter.hasNext()) {<a name="line.797"></a> <FONT color="green">798</FONT> iter.advance();<a name="line.798"></a> <FONT color="green">799</FONT> double test = other.getEntry(iter.key());<a name="line.799"></a> <FONT color="green">800</FONT> if (Double.doubleToLongBits(test) != Double.doubleToLongBits(iter.value())) {<a name="line.800"></a> <FONT color="green">801</FONT> return false;<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> iter = other.getEntries().iterator();<a name="line.804"></a> <FONT color="green">805</FONT> while (iter.hasNext()) {<a name="line.805"></a> <FONT color="green">806</FONT> iter.advance();<a name="line.806"></a> <FONT color="green">807</FONT> double test = iter.value();<a name="line.807"></a> <FONT color="green">808</FONT> if (Double.doubleToLongBits(test) != Double.doubleToLongBits(getEntry(iter.key()))) {<a name="line.808"></a> <FONT color="green">809</FONT> return false;<a name="line.809"></a> <FONT color="green">810</FONT> }<a name="line.810"></a> <FONT color="green">811</FONT> }<a name="line.811"></a> <FONT color="green">812</FONT> return true;<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> /**<a name="line.815"></a> <FONT color="green">816</FONT> *<a name="line.816"></a> <FONT color="green">817</FONT> * @return the percentage of none zero elements as a decimal percent.<a name="line.817"></a> <FONT color="green">818</FONT> */<a name="line.818"></a> <FONT color="green">819</FONT> public double getSparcity() {<a name="line.819"></a> <FONT color="green">820</FONT> return (double)entries.size()/(double)getDimension();<a name="line.820"></a> <FONT color="green">821</FONT> }<a name="line.821"></a> <FONT color="green">822</FONT> <a name="line.822"></a> <FONT color="green">823</FONT> /** {@inheritDoc} */<a name="line.823"></a> <FONT color="green">824</FONT> @Override<a name="line.824"></a> <FONT color="green">825</FONT> public java.util.Iterator<Entry> sparseIterator() {<a name="line.825"></a> <FONT color="green">826</FONT> return new OpenMapSparseIterator();<a name="line.826"></a> <FONT color="green">827</FONT> }<a name="line.827"></a> <FONT color="green">828</FONT> <a name="line.828"></a> <FONT color="green">829</FONT> /**<a name="line.829"></a> <FONT color="green">830</FONT> * Implementation of <code>Entry</code> optimized for OpenMap.<a name="line.830"></a> <FONT color="green">831</FONT> * <p>This implementation does not allow arbitrary calls to <code>setIndex</code><a name="line.831"></a> <FONT color="green">832</FONT> * since the order that entries are returned is undefined.<a name="line.832"></a> <FONT color="green">833</FONT> */<a name="line.833"></a> <FONT color="green">834</FONT> protected class OpenMapEntry extends Entry {<a name="line.834"></a> <FONT color="green">835</FONT> <a name="line.835"></a> <FONT color="green">836</FONT> /** Iterator pointing to the entry. */<a name="line.836"></a> <FONT color="green">837</FONT> private final Iterator iter;<a name="line.837"></a> <FONT color="green">838</FONT> <a name="line.838"></a> <FONT color="green">839</FONT> /** Build an entry from an iterator point to an element.<a name="line.839"></a> <FONT color="green">840</FONT> * @param iter iterator pointing to the entry<a name="line.840"></a> <FONT color="green">841</FONT> */<a name="line.841"></a> <FONT color="green">842</FONT> protected OpenMapEntry(Iterator iter) {<a name="line.842"></a> <FONT color="green">843</FONT> this.iter = iter;<a name="line.843"></a> <FONT color="green">844</FONT> }<a name="line.844"></a> <FONT color="green">845</FONT> <a name="line.845"></a> <FONT color="green">846</FONT> /** {@inheritDoc} */<a name="line.846"></a> <FONT color="green">847</FONT> @Override<a name="line.847"></a> <FONT color="green">848</FONT> public double getValue() {<a name="line.848"></a> <FONT color="green">849</FONT> return iter.value();<a name="line.849"></a> <FONT color="green">850</FONT> }<a name="line.850"></a> <FONT color="green">851</FONT> <a name="line.851"></a> <FONT color="green">852</FONT> /** {@inheritDoc} */<a name="line.852"></a> <FONT color="green">853</FONT> @Override<a name="line.853"></a> <FONT color="green">854</FONT> public void setValue(double value) {<a name="line.854"></a> <FONT color="green">855</FONT> entries.put(iter.key(), value);<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> /** {@inheritDoc} */<a name="line.858"></a> <FONT color="green">859</FONT> @Override<a name="line.859"></a> <FONT color="green">860</FONT> public int getIndex() {<a name="line.860"></a> <FONT color="green">861</FONT> return iter.key();<a name="line.861"></a> <FONT color="green">862</FONT> }<a name="line.862"></a> <FONT color="green">863</FONT> <a name="line.863"></a> <FONT color="green">864</FONT> }<a name="line.864"></a> <FONT color="green">865</FONT> <a name="line.865"></a> <FONT color="green">866</FONT> /**<a name="line.866"></a> <FONT color="green">867</FONT> * Iterator class to do iteration over just the non-zero elements.<a name="line.867"></a> <FONT color="green">868</FONT> * <p>This implementation is fail-fast, so cannot be used to modify any zero element.<a name="line.868"></a> <FONT color="green">869</FONT> *<a name="line.869"></a> <FONT color="green">870</FONT> */<a name="line.870"></a> <FONT color="green">871</FONT> protected class OpenMapSparseIterator implements java.util.Iterator<Entry> {<a name="line.871"></a> <FONT color="green">872</FONT> <a name="line.872"></a> <FONT color="green">873</FONT> /** Underlying iterator. */<a name="line.873"></a> <FONT color="green">874</FONT> private final Iterator iter;<a name="line.874"></a> <FONT color="green">875</FONT> <a name="line.875"></a> <FONT color="green">876</FONT> /** Current entry. */<a name="line.876"></a> <FONT color="green">877</FONT> private final Entry current;<a name="line.877"></a> <FONT color="green">878</FONT> <a name="line.878"></a> <FONT color="green">879</FONT> /** Simple constructor. */<a name="line.879"></a> <FONT color="green">880</FONT> protected OpenMapSparseIterator() {<a name="line.880"></a> <FONT color="green">881</FONT> iter = entries.iterator();<a name="line.881"></a> <FONT color="green">882</FONT> current = new OpenMapEntry(iter);<a name="line.882"></a> <FONT color="green">883</FONT> }<a name="line.883"></a> <FONT color="green">884</FONT> <a name="line.884"></a> <FONT color="green">885</FONT> /** {@inheritDoc} */<a name="line.885"></a> <FONT color="green">886</FONT> public boolean hasNext() {<a name="line.886"></a> <FONT color="green">887</FONT> return iter.hasNext();<a name="line.887"></a> <FONT color="green">888</FONT> }<a name="line.888"></a> <FONT color="green">889</FONT> <a name="line.889"></a> <FONT color="green">890</FONT> /** {@inheritDoc} */<a name="line.890"></a> <FONT color="green">891</FONT> public Entry next() {<a name="line.891"></a> <FONT color="green">892</FONT> iter.advance();<a name="line.892"></a> <FONT color="green">893</FONT> return current;<a name="line.893"></a> <FONT color="green">894</FONT> }<a name="line.894"></a> <FONT color="green">895</FONT> <a name="line.895"></a> <FONT color="green">896</FONT> /** {@inheritDoc} */<a name="line.896"></a> <FONT color="green">897</FONT> public void remove() {<a name="line.897"></a> <FONT color="green">898</FONT> throw new UnsupportedOperationException("Not supported");<a name="line.898"></a> <FONT color="green">899</FONT> }<a name="line.899"></a> <FONT color="green">900</FONT> <a name="line.900"></a> <FONT color="green">901</FONT> }<a name="line.901"></a> <FONT color="green">902</FONT> }<a name="line.902"></a> </PRE> </BODY> </HTML>