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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> <a name="line.17"></a> <FONT color="green">018</FONT> package org.apache.commons.math.ode.jacobians;<a name="line.18"></a> <FONT color="green">019</FONT> <a name="line.19"></a> <FONT color="green">020</FONT> import java.io.IOException;<a name="line.20"></a> <FONT color="green">021</FONT> import java.io.ObjectInput;<a name="line.21"></a> <FONT color="green">022</FONT> import java.io.ObjectOutput;<a name="line.22"></a> <FONT color="green">023</FONT> import java.lang.reflect.Array;<a name="line.23"></a> <FONT color="green">024</FONT> import java.util.ArrayList;<a name="line.24"></a> <FONT color="green">025</FONT> import java.util.Collection;<a name="line.25"></a> <FONT color="green">026</FONT> <a name="line.26"></a> <FONT color="green">027</FONT> import org.apache.commons.math.MathRuntimeException;<a name="line.27"></a> <FONT color="green">028</FONT> import org.apache.commons.math.MaxEvaluationsExceededException;<a name="line.28"></a> <FONT color="green">029</FONT> import org.apache.commons.math.ode.DerivativeException;<a name="line.29"></a> <FONT color="green">030</FONT> import org.apache.commons.math.ode.FirstOrderDifferentialEquations;<a name="line.30"></a> <FONT color="green">031</FONT> import org.apache.commons.math.ode.FirstOrderIntegrator;<a name="line.31"></a> <FONT color="green">032</FONT> import org.apache.commons.math.ode.IntegratorException;<a name="line.32"></a> <FONT color="green">033</FONT> import org.apache.commons.math.ode.events.EventException;<a name="line.33"></a> <FONT color="green">034</FONT> import org.apache.commons.math.ode.events.EventHandler;<a name="line.34"></a> <FONT color="green">035</FONT> import org.apache.commons.math.ode.sampling.StepHandler;<a name="line.35"></a> <FONT color="green">036</FONT> import org.apache.commons.math.ode.sampling.StepInterpolator;<a name="line.36"></a> <FONT color="green">037</FONT> <a name="line.37"></a> <FONT color="green">038</FONT> /** This class enhances a first order integrator for differential equations to<a name="line.38"></a> <FONT color="green">039</FONT> * compute also partial derivatives of the solution with respect to initial state<a name="line.39"></a> <FONT color="green">040</FONT> * and parameters.<a name="line.40"></a> <FONT color="green">041</FONT> * <p>In order to compute both the state and its derivatives, the ODE problem<a name="line.41"></a> <FONT color="green">042</FONT> * is extended with jacobians of the raw ODE and the variational equations are<a name="line.42"></a> <FONT color="green">043</FONT> * added to form a new compound problem of higher dimension. If the original ODE<a name="line.43"></a> <FONT color="green">044</FONT> * problem has dimension n and there are p parameters, the compound problem will<a name="line.44"></a> <FONT color="green">045</FONT> * have dimension n &times; (1 + n + p).</p><a name="line.45"></a> <FONT color="green">046</FONT> * @see ParameterizedODE<a name="line.46"></a> <FONT color="green">047</FONT> * @see ODEWithJacobians<a name="line.47"></a> <FONT color="green">048</FONT> * @version $Revision: 927342 $ $Date: 2010-03-25 06:55:55 -0400 (Thu, 25 Mar 2010) $<a name="line.48"></a> <FONT color="green">049</FONT> * @since 2.1<a name="line.49"></a> <FONT color="green">050</FONT> */<a name="line.50"></a> <FONT color="green">051</FONT> public class FirstOrderIntegratorWithJacobians {<a name="line.51"></a> <FONT color="green">052</FONT> <a name="line.52"></a> <FONT color="green">053</FONT> /** Underlying integrator for compound problem. */<a name="line.53"></a> <FONT color="green">054</FONT> private final FirstOrderIntegrator integrator;<a name="line.54"></a> <FONT color="green">055</FONT> <a name="line.55"></a> <FONT color="green">056</FONT> /** Raw equations to integrate. */<a name="line.56"></a> <FONT color="green">057</FONT> private final ODEWithJacobians ode;<a name="line.57"></a> <FONT color="green">058</FONT> <a name="line.58"></a> <FONT color="green">059</FONT> /** Maximal number of evaluations allowed. */<a name="line.59"></a> <FONT color="green">060</FONT> private int maxEvaluations;<a name="line.60"></a> <FONT color="green">061</FONT> <a name="line.61"></a> <FONT color="green">062</FONT> /** Number of evaluations already performed. */<a name="line.62"></a> <FONT color="green">063</FONT> private int evaluations;<a name="line.63"></a> <FONT color="green">064</FONT> <a name="line.64"></a> <FONT color="green">065</FONT> /** Build an enhanced integrator using internal differentiation to compute jacobians.<a name="line.65"></a> <FONT color="green">066</FONT> * @param integrator underlying integrator to solve the compound problem<a name="line.66"></a> <FONT color="green">067</FONT> * @param ode original problem (f in the equation y' = f(t, y))<a name="line.67"></a> <FONT color="green">068</FONT> * @param p parameters array (may be null if {@link<a name="line.68"></a> <FONT color="green">069</FONT> * ParameterizedODE#getParametersDimension()<a name="line.69"></a> <FONT color="green">070</FONT> * getParametersDimension()} from original problem is zero)<a name="line.70"></a> <FONT color="green">071</FONT> * @param hY step sizes to use for computing the jacobian df/dy, must have the<a name="line.71"></a> <FONT color="green">072</FONT> * same dimension as the original problem<a name="line.72"></a> <FONT color="green">073</FONT> * @param hP step sizes to use for computing the jacobian df/dp, must have the<a name="line.73"></a> <FONT color="green">074</FONT> * same dimension as the original problem parameters dimension<a name="line.74"></a> <FONT color="green">075</FONT> * @see #FirstOrderIntegratorWithJacobians(FirstOrderIntegrator,<a name="line.75"></a> <FONT color="green">076</FONT> * ODEWithJacobians)<a name="line.76"></a> <FONT color="green">077</FONT> */<a name="line.77"></a> <FONT color="green">078</FONT> public FirstOrderIntegratorWithJacobians(final FirstOrderIntegrator integrator,<a name="line.78"></a> <FONT color="green">079</FONT> final ParameterizedODE ode,<a name="line.79"></a> <FONT color="green">080</FONT> final double[] p, final double[] hY, final double[] hP) {<a name="line.80"></a> <FONT color="green">081</FONT> checkDimension(ode.getDimension(), hY);<a name="line.81"></a> <FONT color="green">082</FONT> checkDimension(ode.getParametersDimension(), p);<a name="line.82"></a> <FONT color="green">083</FONT> checkDimension(ode.getParametersDimension(), hP);<a name="line.83"></a> <FONT color="green">084</FONT> this.integrator = integrator;<a name="line.84"></a> <FONT color="green">085</FONT> this.ode = new FiniteDifferencesWrapper(ode, p, hY, hP);<a name="line.85"></a> <FONT color="green">086</FONT> setMaxEvaluations(-1);<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> /** Build an enhanced integrator using ODE builtin jacobian computation features.<a name="line.89"></a> <FONT color="green">090</FONT> * @param integrator underlying integrator to solve the compound problem<a name="line.90"></a> <FONT color="green">091</FONT> * @param ode original problem, which can compute the jacobians by itself<a name="line.91"></a> <FONT color="green">092</FONT> * @see #FirstOrderIntegratorWithJacobians(FirstOrderIntegrator,<a name="line.92"></a> <FONT color="green">093</FONT> * ParameterizedODE, double[], double[], double[])<a name="line.93"></a> <FONT color="green">094</FONT> */<a name="line.94"></a> <FONT color="green">095</FONT> public FirstOrderIntegratorWithJacobians(final FirstOrderIntegrator integrator,<a name="line.95"></a> <FONT color="green">096</FONT> final ODEWithJacobians ode) {<a name="line.96"></a> <FONT color="green">097</FONT> this.integrator = integrator;<a name="line.97"></a> <FONT color="green">098</FONT> this.ode = ode;<a name="line.98"></a> <FONT color="green">099</FONT> setMaxEvaluations(-1);<a name="line.99"></a> <FONT color="green">100</FONT> }<a name="line.100"></a> <FONT color="green">101</FONT> <a name="line.101"></a> <FONT color="green">102</FONT> /** Add a step handler to this integrator.<a name="line.102"></a> <FONT color="green">103</FONT> * <p>The handler will be called by the integrator for each accepted<a name="line.103"></a> <FONT color="green">104</FONT> * step.</p><a name="line.104"></a> <FONT color="green">105</FONT> * @param handler handler for the accepted steps<a name="line.105"></a> <FONT color="green">106</FONT> * @see #getStepHandlers()<a name="line.106"></a> <FONT color="green">107</FONT> * @see #clearStepHandlers()<a name="line.107"></a> <FONT color="green">108</FONT> */<a name="line.108"></a> <FONT color="green">109</FONT> public void addStepHandler(StepHandlerWithJacobians handler) {<a name="line.109"></a> <FONT color="green">110</FONT> final int n = ode.getDimension();<a name="line.110"></a> <FONT color="green">111</FONT> final int k = ode.getParametersDimension();<a name="line.111"></a> <FONT color="green">112</FONT> integrator.addStepHandler(new StepHandlerWrapper(handler, n, k));<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> /** Get all the step handlers that have been added to the integrator.<a name="line.115"></a> <FONT color="green">116</FONT> * @return an unmodifiable collection of the added events handlers<a name="line.116"></a> <FONT color="green">117</FONT> * @see #addStepHandler(StepHandlerWithJacobians)<a name="line.117"></a> <FONT color="green">118</FONT> * @see #clearStepHandlers()<a name="line.118"></a> <FONT color="green">119</FONT> */<a name="line.119"></a> <FONT color="green">120</FONT> public Collection<StepHandlerWithJacobians> getStepHandlers() {<a name="line.120"></a> <FONT color="green">121</FONT> final Collection<StepHandlerWithJacobians> handlers =<a name="line.121"></a> <FONT color="green">122</FONT> new ArrayList<StepHandlerWithJacobians>();<a name="line.122"></a> <FONT color="green">123</FONT> for (final StepHandler handler : integrator.getStepHandlers()) {<a name="line.123"></a> <FONT color="green">124</FONT> if (handler instanceof StepHandlerWrapper) {<a name="line.124"></a> <FONT color="green">125</FONT> handlers.add(((StepHandlerWrapper) handler).getHandler());<a name="line.125"></a> <FONT color="green">126</FONT> }<a name="line.126"></a> <FONT color="green">127</FONT> }<a name="line.127"></a> <FONT color="green">128</FONT> return handlers;<a name="line.128"></a> <FONT color="green">129</FONT> }<a name="line.129"></a> <FONT color="green">130</FONT> <a name="line.130"></a> <FONT color="green">131</FONT> /** Remove all the step handlers that have been added to the integrator.<a name="line.131"></a> <FONT color="green">132</FONT> * @see #addStepHandler(StepHandlerWithJacobians)<a name="line.132"></a> <FONT color="green">133</FONT> * @see #getStepHandlers()<a name="line.133"></a> <FONT color="green">134</FONT> */<a name="line.134"></a> <FONT color="green">135</FONT> public void clearStepHandlers() {<a name="line.135"></a> <FONT color="green">136</FONT> integrator.clearStepHandlers();<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> /** Add an event handler to the integrator.<a name="line.139"></a> <FONT color="green">140</FONT> * @param handler event handler<a name="line.140"></a> <FONT color="green">141</FONT> * @param maxCheckInterval maximal time interval between switching<a name="line.141"></a> <FONT color="green">142</FONT> * function checks (this interval prevents missing sign changes in<a name="line.142"></a> <FONT color="green">143</FONT> * case the integration steps becomes very large)<a name="line.143"></a> <FONT color="green">144</FONT> * @param convergence convergence threshold in the event time search<a name="line.144"></a> <FONT color="green">145</FONT> * @param maxIterationCount upper limit of the iteration count in<a name="line.145"></a> <FONT color="green">146</FONT> * the event time search<a name="line.146"></a> <FONT color="green">147</FONT> * @see #getEventHandlers()<a name="line.147"></a> <FONT color="green">148</FONT> * @see #clearEventHandlers()<a name="line.148"></a> <FONT color="green">149</FONT> */<a name="line.149"></a> <FONT color="green">150</FONT> public void addEventHandler(EventHandlerWithJacobians handler,<a name="line.150"></a> <FONT color="green">151</FONT> double maxCheckInterval,<a name="line.151"></a> <FONT color="green">152</FONT> double convergence,<a name="line.152"></a> <FONT color="green">153</FONT> int maxIterationCount) {<a name="line.153"></a> <FONT color="green">154</FONT> final int n = ode.getDimension();<a name="line.154"></a> <FONT color="green">155</FONT> final int k = ode.getParametersDimension();<a name="line.155"></a> <FONT color="green">156</FONT> integrator.addEventHandler(new EventHandlerWrapper(handler, n, k),<a name="line.156"></a> <FONT color="green">157</FONT> maxCheckInterval, convergence, maxIterationCount);<a name="line.157"></a> <FONT color="green">158</FONT> }<a name="line.158"></a> <FONT color="green">159</FONT> <a name="line.159"></a> <FONT color="green">160</FONT> /** Get all the event handlers that have been added to the integrator.<a name="line.160"></a> <FONT color="green">161</FONT> * @return an unmodifiable collection of the added events handlers<a name="line.161"></a> <FONT color="green">162</FONT> * @see #addEventHandler(EventHandlerWithJacobians, double, double, int)<a name="line.162"></a> <FONT color="green">163</FONT> * @see #clearEventHandlers()<a name="line.163"></a> <FONT color="green">164</FONT> */<a name="line.164"></a> <FONT color="green">165</FONT> public Collection<EventHandlerWithJacobians> getEventHandlers() {<a name="line.165"></a> <FONT color="green">166</FONT> final Collection<EventHandlerWithJacobians> handlers =<a name="line.166"></a> <FONT color="green">167</FONT> new ArrayList<EventHandlerWithJacobians>();<a name="line.167"></a> <FONT color="green">168</FONT> for (final EventHandler handler : integrator.getEventHandlers()) {<a name="line.168"></a> <FONT color="green">169</FONT> if (handler instanceof EventHandlerWrapper) {<a name="line.169"></a> <FONT color="green">170</FONT> handlers.add(((EventHandlerWrapper) handler).getHandler());<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> return handlers;<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> /** Remove all the event handlers that have been added to the integrator.<a name="line.176"></a> <FONT color="green">177</FONT> * @see #addEventHandler(EventHandlerWithJacobians, double, double, int)<a name="line.177"></a> <FONT color="green">178</FONT> * @see #getEventHandlers()<a name="line.178"></a> <FONT color="green">179</FONT> */<a name="line.179"></a> <FONT color="green">180</FONT> public void clearEventHandlers() {<a name="line.180"></a> <FONT color="green">181</FONT> integrator.clearEventHandlers();<a name="line.181"></a> <FONT color="green">182</FONT> }<a name="line.182"></a> <FONT color="green">183</FONT> <a name="line.183"></a> <FONT color="green">184</FONT> /** Integrate the differential equations and the variational equations up to the given time.<a name="line.184"></a> <FONT color="green">185</FONT> * <p>This method solves an Initial Value Problem (IVP) and also computes the derivatives<a name="line.185"></a> <FONT color="green">186</FONT> * of the solution with respect to initial state and parameters. This can be used as<a name="line.186"></a> <FONT color="green">187</FONT> * a basis to solve Boundary Value Problems (BVP).</p><a name="line.187"></a> <FONT color="green">188</FONT> * <p>Since this method stores some internal state variables made<a name="line.188"></a> <FONT color="green">189</FONT> * available in its public interface during integration ({@link<a name="line.189"></a> <FONT color="green">190</FONT> * #getCurrentSignedStepsize()}), it is <em>not</em> thread-safe.</p><a name="line.190"></a> <FONT color="green">191</FONT> * @param t0 initial time<a name="line.191"></a> <FONT color="green">192</FONT> * @param y0 initial value of the state vector at t0<a name="line.192"></a> <FONT color="green">193</FONT> * @param dY0dP initial value of the state vector derivative with respect to the<a name="line.193"></a> <FONT color="green">194</FONT> * parameters at t0<a name="line.194"></a> <FONT color="green">195</FONT> * @param t target time for the integration<a name="line.195"></a> <FONT color="green">196</FONT> * (can be set to a value smaller than <code>t0</code> for backward integration)<a name="line.196"></a> <FONT color="green">197</FONT> * @param y placeholder where to put the state vector at each successful<a name="line.197"></a> <FONT color="green">198</FONT> * step (and hence at the end of integration), can be the same object as y0<a name="line.198"></a> <FONT color="green">199</FONT> * @param dYdY0 placeholder where to put the state vector derivative with respect<a name="line.199"></a> <FONT color="green">200</FONT> * to the initial state (dy[i]/dy0[j] is in element array dYdY0[i][j]) at each successful<a name="line.200"></a> <FONT color="green">201</FONT> * step (and hence at the end of integration)<a name="line.201"></a> <FONT color="green">202</FONT> * @param dYdP placeholder where to put the state vector derivative with respect<a name="line.202"></a> <FONT color="green">203</FONT> * to the parameters (dy[i]/dp[j] is in element array dYdP[i][j]) at each successful<a name="line.203"></a> <FONT color="green">204</FONT> * step (and hence at the end of integration)<a name="line.204"></a> <FONT color="green">205</FONT> * @return stop time, will be the same as target time if integration reached its<a name="line.205"></a> <FONT color="green">206</FONT> * target, but may be different if some event handler stops it at some point.<a name="line.206"></a> <FONT color="green">207</FONT> * @throws IntegratorException if the integrator cannot perform integration<a name="line.207"></a> <FONT color="green">208</FONT> * @throws DerivativeException this exception is propagated to the caller if<a name="line.208"></a> <FONT color="green">209</FONT> * the underlying user function triggers one<a name="line.209"></a> <FONT color="green">210</FONT> */<a name="line.210"></a> <FONT color="green">211</FONT> public double integrate(final double t0, final double[] y0, final double[][] dY0dP,<a name="line.211"></a> <FONT color="green">212</FONT> final double t, final double[] y,<a name="line.212"></a> <FONT color="green">213</FONT> final double[][] dYdY0, final double[][] dYdP)<a name="line.213"></a> <FONT color="green">214</FONT> throws DerivativeException, IntegratorException {<a name="line.214"></a> <FONT color="green">215</FONT> <a name="line.215"></a> <FONT color="green">216</FONT> final int n = ode.getDimension();<a name="line.216"></a> <FONT color="green">217</FONT> final int k = ode.getParametersDimension();<a name="line.217"></a> <FONT color="green">218</FONT> checkDimension(n, y0);<a name="line.218"></a> <FONT color="green">219</FONT> checkDimension(n, y);<a name="line.219"></a> <FONT color="green">220</FONT> checkDimension(n, dYdY0);<a name="line.220"></a> <FONT color="green">221</FONT> checkDimension(n, dYdY0[0]);<a name="line.221"></a> <FONT color="green">222</FONT> if (k != 0) {<a name="line.222"></a> <FONT color="green">223</FONT> checkDimension(n, dY0dP);<a name="line.223"></a> <FONT color="green">224</FONT> checkDimension(k, dY0dP[0]);<a name="line.224"></a> <FONT color="green">225</FONT> checkDimension(n, dYdP);<a name="line.225"></a> <FONT color="green">226</FONT> checkDimension(k, dYdP[0]);<a name="line.226"></a> <FONT color="green">227</FONT> }<a name="line.227"></a> <FONT color="green">228</FONT> <a name="line.228"></a> <FONT color="green">229</FONT> // set up initial state, including partial derivatives<a name="line.229"></a> <FONT color="green">230</FONT> // the compound state z contains the raw state y and its derivatives<a name="line.230"></a> <FONT color="green">231</FONT> // with respect to initial state y0 and to parameters p<a name="line.231"></a> <FONT color="green">232</FONT> // y[i] is stored in z[i]<a name="line.232"></a> <FONT color="green">233</FONT> // dy[i]/dy0[j] is stored in z[n + i * n + j]<a name="line.233"></a> <FONT color="green">234</FONT> // dy[i]/dp[j] is stored in z[n * (n + 1) + i * k + j]<a name="line.234"></a> <FONT color="green">235</FONT> final double[] z = new double[n * (1 + n + k)];<a name="line.235"></a> <FONT color="green">236</FONT> System.arraycopy(y0, 0, z, 0, n);<a name="line.236"></a> <FONT color="green">237</FONT> for (int i = 0; i < n; ++i) {<a name="line.237"></a> <FONT color="green">238</FONT> <a name="line.238"></a> <FONT color="green">239</FONT> // set diagonal element of dy/dy0 to 1.0 at t = t0<a name="line.239"></a> <FONT color="green">240</FONT> z[i * (1 + n) + n] = 1.0;<a name="line.240"></a> <FONT color="green">241</FONT> <a name="line.241"></a> <FONT color="green">242</FONT> // set initial derivatives with respect to parameters<a name="line.242"></a> <FONT color="green">243</FONT> System.arraycopy(dY0dP[i], 0, z, n * (n + 1) + i * k, k);<a name="line.243"></a> <FONT color="green">244</FONT> <a name="line.244"></a> <FONT color="green">245</FONT> }<a name="line.245"></a> <FONT color="green">246</FONT> <a name="line.246"></a> <FONT color="green">247</FONT> // integrate the compound state variational equations<a name="line.247"></a> <FONT color="green">248</FONT> evaluations = 0;<a name="line.248"></a> <FONT color="green">249</FONT> final double stopTime = integrator.integrate(new MappingWrapper(), t0, z, t, z);<a name="line.249"></a> <FONT color="green">250</FONT> <a name="line.250"></a> <FONT color="green">251</FONT> // dispatch the final compound state into the state and partial derivatives arrays<a name="line.251"></a> <FONT color="green">252</FONT> dispatchCompoundState(z, y, dYdY0, dYdP);<a name="line.252"></a> <FONT color="green">253</FONT> <a name="line.253"></a> <FONT color="green">254</FONT> return stopTime;<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> <a name="line.257"></a> <FONT color="green">258</FONT> /** Dispatch a compound state array into state and jacobians arrays.<a name="line.258"></a> <FONT color="green">259</FONT> * @param z compound state<a name="line.259"></a> <FONT color="green">260</FONT> * @param y raw state array to fill<a name="line.260"></a> <FONT color="green">261</FONT> * @param dydy0 jacobian array to fill<a name="line.261"></a> <FONT color="green">262</FONT> * @param dydp jacobian array to fill<a name="line.262"></a> <FONT color="green">263</FONT> */<a name="line.263"></a> <FONT color="green">264</FONT> private static void dispatchCompoundState(final double[] z, final double[] y,<a name="line.264"></a> <FONT color="green">265</FONT> final double[][] dydy0, final double[][] dydp) {<a name="line.265"></a> <FONT color="green">266</FONT> <a name="line.266"></a> <FONT color="green">267</FONT> final int n = y.length;<a name="line.267"></a> <FONT color="green">268</FONT> final int k = dydp[0].length;<a name="line.268"></a> <FONT color="green">269</FONT> <a name="line.269"></a> <FONT color="green">270</FONT> // state<a name="line.270"></a> <FONT color="green">271</FONT> System.arraycopy(z, 0, y, 0, n);<a name="line.271"></a> <FONT color="green">272</FONT> <a name="line.272"></a> <FONT color="green">273</FONT> // jacobian with respect to initial state<a name="line.273"></a> <FONT color="green">274</FONT> for (int i = 0; i < n; ++i) {<a name="line.274"></a> <FONT color="green">275</FONT> System.arraycopy(z, n * (i + 1), dydy0[i], 0, n);<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> // jacobian with respect to parameters<a name="line.278"></a> <FONT color="green">279</FONT> for (int i = 0; i < n; ++i) {<a name="line.279"></a> <FONT color="green">280</FONT> System.arraycopy(z, n * (n + 1) + i * k, dydp[i], 0, k);<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> <a name="line.284"></a> <FONT color="green">285</FONT> /** Get the current value of the step start time t<sub>i</sub>.<a name="line.285"></a> <FONT color="green">286</FONT> * <p>This method can be called during integration (typically by<a name="line.286"></a> <FONT color="green">287</FONT> * the object implementing the {@link FirstOrderDifferentialEquations<a name="line.287"></a> <FONT color="green">288</FONT> * differential equations} problem) if the value of the current step that<a name="line.288"></a> <FONT color="green">289</FONT> * is attempted is needed.</p><a name="line.289"></a> <FONT color="green">290</FONT> * <p>The result is undefined if the method is called outside of<a name="line.290"></a> <FONT color="green">291</FONT> * calls to <code>integrate</code>.</p><a name="line.291"></a> <FONT color="green">292</FONT> * @return current value of the step start time t<sub>i</sub><a name="line.292"></a> <FONT color="green">293</FONT> */<a name="line.293"></a> <FONT color="green">294</FONT> public double getCurrentStepStart() {<a name="line.294"></a> <FONT color="green">295</FONT> return integrator.getCurrentStepStart();<a name="line.295"></a> <FONT color="green">296</FONT> }<a name="line.296"></a> <FONT color="green">297</FONT> <a name="line.297"></a> <FONT color="green">298</FONT> /** Get the current signed value of the integration stepsize.<a name="line.298"></a> <FONT color="green">299</FONT> * <p>This method can be called during integration (typically by<a name="line.299"></a> <FONT color="green">300</FONT> * the object implementing the {@link FirstOrderDifferentialEquations<a name="line.300"></a> <FONT color="green">301</FONT> * differential equations} problem) if the signed value of the current stepsize<a name="line.301"></a> <FONT color="green">302</FONT> * that is tried is needed.</p><a name="line.302"></a> <FONT color="green">303</FONT> * <p>The result is undefined if the method is called outside of<a name="line.303"></a> <FONT color="green">304</FONT> * calls to <code>integrate</code>.</p><a name="line.304"></a> <FONT color="green">305</FONT> * @return current signed value of the stepsize<a name="line.305"></a> <FONT color="green">306</FONT> */<a name="line.306"></a> <FONT color="green">307</FONT> public double getCurrentSignedStepsize() {<a name="line.307"></a> <FONT color="green">308</FONT> return integrator.getCurrentSignedStepsize();<a name="line.308"></a> <FONT color="green">309</FONT> }<a name="line.309"></a> <FONT color="green">310</FONT> <a name="line.310"></a> <FONT color="green">311</FONT> /** Set the maximal number of differential equations function evaluations.<a name="line.311"></a> <FONT color="green">312</FONT> * <p>The purpose of this method is to avoid infinite loops which can occur<a name="line.312"></a> <FONT color="green">313</FONT> * for example when stringent error constraints are set or when lots of<a name="line.313"></a> <FONT color="green">314</FONT> * discrete events are triggered, thus leading to many rejected steps.</p><a name="line.314"></a> <FONT color="green">315</FONT> * @param maxEvaluations maximal number of function evaluations (negative<a name="line.315"></a> <FONT color="green">316</FONT> * values are silently converted to maximal integer value, thus representing<a name="line.316"></a> <FONT color="green">317</FONT> * almost unlimited evaluations)<a name="line.317"></a> <FONT color="green">318</FONT> */<a name="line.318"></a> <FONT color="green">319</FONT> public void setMaxEvaluations(int maxEvaluations) {<a name="line.319"></a> <FONT color="green">320</FONT> this.maxEvaluations = (maxEvaluations < 0) ? Integer.MAX_VALUE : maxEvaluations;<a name="line.320"></a> <FONT color="green">321</FONT> }<a name="line.321"></a> <FONT color="green">322</FONT> <a name="line.322"></a> <FONT color="green">323</FONT> /** Get the maximal number of functions evaluations.<a name="line.323"></a> <FONT color="green">324</FONT> * @return maximal number of functions evaluations<a name="line.324"></a> <FONT color="green">325</FONT> */<a name="line.325"></a> <FONT color="green">326</FONT> public int getMaxEvaluations() {<a name="line.326"></a> <FONT color="green">327</FONT> return maxEvaluations;<a name="line.327"></a> <FONT color="green">328</FONT> }<a name="line.328"></a> <FONT color="green">329</FONT> <a name="line.329"></a> <FONT color="green">330</FONT> /** Get the number of evaluations of the differential equations function.<a name="line.330"></a> <FONT color="green">331</FONT> * <p><a name="line.331"></a> <FONT color="green">332</FONT> * The number of evaluations corresponds to the last call to the<a name="line.332"></a> <FONT color="green">333</FONT> * <code>integrate</code> method. It is 0 if the method has not been called yet.<a name="line.333"></a> <FONT color="green">334</FONT> * </p><a name="line.334"></a> <FONT color="green">335</FONT> * @return number of evaluations of the differential equations function<a name="line.335"></a> <FONT color="green">336</FONT> */<a name="line.336"></a> <FONT color="green">337</FONT> public int getEvaluations() {<a name="line.337"></a> <FONT color="green">338</FONT> return evaluations;<a name="line.338"></a> <FONT color="green">339</FONT> }<a name="line.339"></a> <FONT color="green">340</FONT> <a name="line.340"></a> <FONT color="green">341</FONT> /** Check array dimensions.<a name="line.341"></a> <FONT color="green">342</FONT> * @param expected expected dimension<a name="line.342"></a> <FONT color="green">343</FONT> * @param array (may be null if expected is 0)<a name="line.343"></a> <FONT color="green">344</FONT> * @throws IllegalArgumentException if the array dimension does not match the expected one<a name="line.344"></a> <FONT color="green">345</FONT> */<a name="line.345"></a> <FONT color="green">346</FONT> private void checkDimension(final int expected, final Object array)<a name="line.346"></a> <FONT color="green">347</FONT> throws IllegalArgumentException {<a name="line.347"></a> <FONT color="green">348</FONT> int arrayDimension = (array == null) ? 0 : Array.getLength(array);<a name="line.348"></a> <FONT color="green">349</FONT> if (arrayDimension != expected) {<a name="line.349"></a> <FONT color="green">350</FONT> throw MathRuntimeException.createIllegalArgumentException(<a name="line.350"></a> <FONT color="green">351</FONT> "dimension mismatch {0} != {1}", arrayDimension, expected);<a name="line.351"></a> <FONT color="green">352</FONT> }<a name="line.352"></a> <FONT color="green">353</FONT> }<a name="line.353"></a> <FONT color="green">354</FONT> <a name="line.354"></a> <FONT color="green">355</FONT> /** Wrapper class used to map state and jacobians into compound state. */<a name="line.355"></a> <FONT color="green">356</FONT> private class MappingWrapper implements FirstOrderDifferentialEquations {<a name="line.356"></a> <FONT color="green">357</FONT> <a name="line.357"></a> <FONT color="green">358</FONT> /** Current state. */<a name="line.358"></a> <FONT color="green">359</FONT> private final double[] y;<a name="line.359"></a> <FONT color="green">360</FONT> <a name="line.360"></a> <FONT color="green">361</FONT> /** Time derivative of the current state. */<a name="line.361"></a> <FONT color="green">362</FONT> private final double[] yDot;<a name="line.362"></a> <FONT color="green">363</FONT> <a name="line.363"></a> <FONT color="green">364</FONT> /** Derivatives of yDot with respect to state. */<a name="line.364"></a> <FONT color="green">365</FONT> private final double[][] dFdY;<a name="line.365"></a> <FONT color="green">366</FONT> <a name="line.366"></a> <FONT color="green">367</FONT> /** Derivatives of yDot with respect to parameters. */<a name="line.367"></a> <FONT color="green">368</FONT> private final double[][] dFdP;<a name="line.368"></a> <FONT color="green">369</FONT> <a name="line.369"></a> <FONT color="green">370</FONT> /** Simple constructor.<a name="line.370"></a> <FONT color="green">371</FONT> */<a name="line.371"></a> <FONT color="green">372</FONT> public MappingWrapper() {<a name="line.372"></a> <FONT color="green">373</FONT> <a name="line.373"></a> <FONT color="green">374</FONT> final int n = ode.getDimension();<a name="line.374"></a> <FONT color="green">375</FONT> final int k = ode.getParametersDimension();<a name="line.375"></a> <FONT color="green">376</FONT> y = new double[n];<a name="line.376"></a> <FONT color="green">377</FONT> yDot = new double[n];<a name="line.377"></a> <FONT color="green">378</FONT> dFdY = new double[n][n];<a name="line.378"></a> <FONT color="green">379</FONT> dFdP = new double[n][k];<a name="line.379"></a> <FONT color="green">380</FONT> <a name="line.380"></a> <FONT color="green">381</FONT> }<a name="line.381"></a> <FONT color="green">382</FONT> <a name="line.382"></a> <FONT color="green">383</FONT> /** {@inheritDoc} */<a name="line.383"></a> <FONT color="green">384</FONT> public int getDimension() {<a name="line.384"></a> <FONT color="green">385</FONT> final int n = y.length;<a name="line.385"></a> <FONT color="green">386</FONT> final int k = dFdP[0].length;<a name="line.386"></a> <FONT color="green">387</FONT> return n * (1 + n + k);<a name="line.387"></a> <FONT color="green">388</FONT> }<a name="line.388"></a> <FONT color="green">389</FONT> <a name="line.389"></a> <FONT color="green">390</FONT> /** {@inheritDoc} */<a name="line.390"></a> <FONT color="green">391</FONT> public void computeDerivatives(final double t, final double[] z, final double[] zDot)<a name="line.391"></a> <FONT color="green">392</FONT> throws DerivativeException {<a name="line.392"></a> <FONT color="green">393</FONT> <a name="line.393"></a> <FONT color="green">394</FONT> final int n = y.length;<a name="line.394"></a> <FONT color="green">395</FONT> final int k = dFdP[0].length;<a name="line.395"></a> <FONT color="green">396</FONT> <a name="line.396"></a> <FONT color="green">397</FONT> // compute raw ODE and its jacobians: dy/dt, d[dy/dt]/dy0 and d[dy/dt]/dp<a name="line.397"></a> <FONT color="green">398</FONT> System.arraycopy(z, 0, y, 0, n);<a name="line.398"></a> <FONT color="green">399</FONT> if (++evaluations > maxEvaluations) {<a name="line.399"></a> <FONT color="green">400</FONT> throw new DerivativeException(new MaxEvaluationsExceededException(maxEvaluations));<a name="line.400"></a> <FONT color="green">401</FONT> }<a name="line.401"></a> <FONT color="green">402</FONT> ode.computeDerivatives(t, y, yDot);<a name="line.402"></a> <FONT color="green">403</FONT> ode.computeJacobians(t, y, yDot, dFdY, dFdP);<a name="line.403"></a> <FONT color="green">404</FONT> <a name="line.404"></a> <FONT color="green">405</FONT> // state part of the compound equations<a name="line.405"></a> <FONT color="green">406</FONT> System.arraycopy(yDot, 0, zDot, 0, n);<a name="line.406"></a> <FONT color="green">407</FONT> <a name="line.407"></a> <FONT color="green">408</FONT> // variational equations: from d[dy/dt]/dy0 to d[dy/dy0]/dt<a name="line.408"></a> <FONT color="green">409</FONT> for (int i = 0; i < n; ++i) {<a name="line.409"></a> <FONT color="green">410</FONT> final double[] dFdYi = dFdY[i];<a name="line.410"></a> <FONT color="green">411</FONT> for (int j = 0; j < n; ++j) {<a name="line.411"></a> <FONT color="green">412</FONT> double s = 0;<a name="line.412"></a> <FONT color="green">413</FONT> final int startIndex = n + j;<a name="line.413"></a> <FONT color="green">414</FONT> int zIndex = startIndex;<a name="line.414"></a> <FONT color="green">415</FONT> for (int l = 0; l < n; ++l) {<a name="line.415"></a> <FONT color="green">416</FONT> s += dFdYi[l] * z[zIndex];<a name="line.416"></a> <FONT color="green">417</FONT> zIndex += n;<a name="line.417"></a> <FONT color="green">418</FONT> }<a name="line.418"></a> <FONT color="green">419</FONT> zDot[startIndex + i * n] = s;<a name="line.419"></a> <FONT color="green">420</FONT> }<a name="line.420"></a> <FONT color="green">421</FONT> }<a name="line.421"></a> <FONT color="green">422</FONT> <a name="line.422"></a> <FONT color="green">423</FONT> // variational equations: from d[dy/dt]/dy0 and d[dy/dt]/dp to d[dy/dp]/dt<a name="line.423"></a> <FONT color="green">424</FONT> for (int i = 0; i < n; ++i) {<a name="line.424"></a> <FONT color="green">425</FONT> final double[] dFdYi = dFdY[i];<a name="line.425"></a> <FONT color="green">426</FONT> final double[] dFdPi = dFdP[i];<a name="line.426"></a> <FONT color="green">427</FONT> for (int j = 0; j < k; ++j) {<a name="line.427"></a> <FONT color="green">428</FONT> double s = dFdPi[j];<a name="line.428"></a> <FONT color="green">429</FONT> final int startIndex = n * (n + 1) + j;<a name="line.429"></a> <FONT color="green">430</FONT> int zIndex = startIndex;<a name="line.430"></a> <FONT color="green">431</FONT> for (int l = 0; l < n; ++l) {<a name="line.431"></a> <FONT color="green">432</FONT> s += dFdYi[l] * z[zIndex];<a name="line.432"></a> <FONT color="green">433</FONT> zIndex += k;<a name="line.433"></a> <FONT color="green">434</FONT> }<a name="line.434"></a> <FONT color="green">435</FONT> zDot[startIndex + i * k] = s;<a name="line.435"></a> <FONT color="green">436</FONT> }<a name="line.436"></a> <FONT color="green">437</FONT> }<a name="line.437"></a> <FONT color="green">438</FONT> <a name="line.438"></a> <FONT color="green">439</FONT> }<a name="line.439"></a> <FONT color="green">440</FONT> <a name="line.440"></a> <FONT color="green">441</FONT> }<a name="line.441"></a> <FONT color="green">442</FONT> <a name="line.442"></a> <FONT color="green">443</FONT> /** Wrapper class to compute jacobians by finite differences for ODE which do not compute them themselves. */<a name="line.443"></a> <FONT color="green">444</FONT> private class FiniteDifferencesWrapper<a name="line.444"></a> <FONT color="green">445</FONT> implements ODEWithJacobians {<a name="line.445"></a> <FONT color="green">446</FONT> <a name="line.446"></a> <FONT color="green">447</FONT> /** Raw ODE without jacobians computation. */<a name="line.447"></a> <FONT color="green">448</FONT> private final ParameterizedODE ode;<a name="line.448"></a> <FONT color="green">449</FONT> <a name="line.449"></a> <FONT color="green">450</FONT> /** Parameters array (may be null if parameters dimension from original problem is zero) */<a name="line.450"></a> <FONT color="green">451</FONT> private final double[] p;<a name="line.451"></a> <FONT color="green">452</FONT> <a name="line.452"></a> <FONT color="green">453</FONT> /** Step sizes to use for computing the jacobian df/dy. */<a name="line.453"></a> <FONT color="green">454</FONT> private final double[] hY;<a name="line.454"></a> <FONT color="green">455</FONT> <a name="line.455"></a> <FONT color="green">456</FONT> /** Step sizes to use for computing the jacobian df/dp. */<a name="line.456"></a> <FONT color="green">457</FONT> private final double[] hP;<a name="line.457"></a> <FONT color="green">458</FONT> <a name="line.458"></a> <FONT color="green">459</FONT> /** Temporary array for state derivatives used to compute jacobians. */<a name="line.459"></a> <FONT color="green">460</FONT> private final double[] tmpDot;<a name="line.460"></a> <FONT color="green">461</FONT> <a name="line.461"></a> <FONT color="green">462</FONT> /** Simple constructor.<a name="line.462"></a> <FONT color="green">463</FONT> * @param ode original ODE problem, without jacobians computations<a name="line.463"></a> <FONT color="green">464</FONT> * @param p parameters array (may be null if parameters dimension from original problem is zero)<a name="line.464"></a> <FONT color="green">465</FONT> * @param hY step sizes to use for computing the jacobian df/dy<a name="line.465"></a> <FONT color="green">466</FONT> * @param hP step sizes to use for computing the jacobian df/dp<a name="line.466"></a> <FONT color="green">467</FONT> */<a name="line.467"></a> <FONT color="green">468</FONT> public FiniteDifferencesWrapper(final ParameterizedODE ode,<a name="line.468"></a> <FONT color="green">469</FONT> final double[] p, final double[] hY, final double[] hP) {<a name="line.469"></a> <FONT color="green">470</FONT> this.ode = ode;<a name="line.470"></a> <FONT color="green">471</FONT> this.p = p.clone();<a name="line.471"></a> <FONT color="green">472</FONT> this.hY = hY.clone();<a name="line.472"></a> <FONT color="green">473</FONT> this.hP = hP.clone();<a name="line.473"></a> <FONT color="green">474</FONT> tmpDot = new double[ode.getDimension()];<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> /** {@inheritDoc} */<a name="line.477"></a> <FONT color="green">478</FONT> public int getDimension() {<a name="line.478"></a> <FONT color="green">479</FONT> return ode.getDimension();<a name="line.479"></a> <FONT color="green">480</FONT> }<a name="line.480"></a> <FONT color="green">481</FONT> <a name="line.481"></a> <FONT color="green">482</FONT> /** {@inheritDoc} */<a name="line.482"></a> <FONT color="green">483</FONT> public void computeDerivatives(double t, double[] y, double[] yDot) throws DerivativeException {<a name="line.483"></a> <FONT color="green">484</FONT> // this call to computeDerivatives has already been counted,<a name="line.484"></a> <FONT color="green">485</FONT> // we must not increment the counter again<a name="line.485"></a> <FONT color="green">486</FONT> ode.computeDerivatives(t, y, yDot);<a name="line.486"></a> <FONT color="green">487</FONT> }<a name="line.487"></a> <FONT color="green">488</FONT> <a name="line.488"></a> <FONT color="green">489</FONT> /** {@inheritDoc} */<a name="line.489"></a> <FONT color="green">490</FONT> public int getParametersDimension() {<a name="line.490"></a> <FONT color="green">491</FONT> return ode.getParametersDimension();<a name="line.491"></a> <FONT color="green">492</FONT> }<a name="line.492"></a> <FONT color="green">493</FONT> <a name="line.493"></a> <FONT color="green">494</FONT> /** {@inheritDoc} */<a name="line.494"></a> <FONT color="green">495</FONT> public void computeJacobians(double t, double[] y, double[] yDot,<a name="line.495"></a> <FONT color="green">496</FONT> double[][] dFdY, double[][] dFdP)<a name="line.496"></a> <FONT color="green">497</FONT> throws DerivativeException {<a name="line.497"></a> <FONT color="green">498</FONT> <a name="line.498"></a> <FONT color="green">499</FONT> final int n = hY.length;<a name="line.499"></a> <FONT color="green">500</FONT> final int k = hP.length;<a name="line.500"></a> <FONT color="green">501</FONT> <a name="line.501"></a> <FONT color="green">502</FONT> evaluations += n + k;<a name="line.502"></a> <FONT color="green">503</FONT> if (evaluations > maxEvaluations) {<a name="line.503"></a> <FONT color="green">504</FONT> throw new DerivativeException(new MaxEvaluationsExceededException(maxEvaluations));<a name="line.504"></a> <FONT color="green">505</FONT> }<a name="line.505"></a> <FONT color="green">506</FONT> <a name="line.506"></a> <FONT color="green">507</FONT> // compute df/dy where f is the ODE and y is the state array<a name="line.507"></a> <FONT color="green">508</FONT> for (int j = 0; j < n; ++j) {<a name="line.508"></a> <FONT color="green">509</FONT> final double savedYj = y[j];<a name="line.509"></a> <FONT color="green">510</FONT> y[j] += hY[j];<a name="line.510"></a> <FONT color="green">511</FONT> ode.computeDerivatives(t, y, tmpDot);<a name="line.511"></a> <FONT color="green">512</FONT> for (int i = 0; i < n; ++i) {<a name="line.512"></a> <FONT color="green">513</FONT> dFdY[i][j] = (tmpDot[i] - yDot[i]) / hY[j];<a name="line.513"></a> <FONT color="green">514</FONT> }<a name="line.514"></a> <FONT color="green">515</FONT> y[j] = savedYj;<a name="line.515"></a> <FONT color="green">516</FONT> }<a name="line.516"></a> <FONT color="green">517</FONT> <a name="line.517"></a> <FONT color="green">518</FONT> // compute df/dp where f is the ODE and p is the parameters array<a name="line.518"></a> <FONT color="green">519</FONT> for (int j = 0; j < k; ++j) {<a name="line.519"></a> <FONT color="green">520</FONT> ode.setParameter(j, p[j] + hP[j]);<a name="line.520"></a> <FONT color="green">521</FONT> ode.computeDerivatives(t, y, tmpDot);<a name="line.521"></a> <FONT color="green">522</FONT> for (int i = 0; i < n; ++i) {<a name="line.522"></a> <FONT color="green">523</FONT> dFdP[i][j] = (tmpDot[i] - yDot[i]) / hP[j];<a name="line.523"></a> <FONT color="green">524</FONT> }<a name="line.524"></a> <FONT color="green">525</FONT> ode.setParameter(j, p[j]);<a name="line.525"></a> <FONT color="green">526</FONT> }<a name="line.526"></a> <FONT color="green">527</FONT> <a name="line.527"></a> <FONT color="green">528</FONT> }<a name="line.528"></a> <FONT color="green">529</FONT> <a name="line.529"></a> <FONT color="green">530</FONT> }<a name="line.530"></a> <FONT color="green">531</FONT> <a name="line.531"></a> <FONT color="green">532</FONT> /** Wrapper for step handlers. */<a name="line.532"></a> <FONT color="green">533</FONT> private static class StepHandlerWrapper implements StepHandler {<a name="line.533"></a> <FONT color="green">534</FONT> <a name="line.534"></a> <FONT color="green">535</FONT> /** Underlying step handler with jacobians. */<a name="line.535"></a> <FONT color="green">536</FONT> private final StepHandlerWithJacobians handler;<a name="line.536"></a> <FONT color="green">537</FONT> <a name="line.537"></a> <FONT color="green">538</FONT> /** Dimension of the original ODE. */<a name="line.538"></a> <FONT color="green">539</FONT> private final int n;<a name="line.539"></a> <FONT color="green">540</FONT> <a name="line.540"></a> <FONT color="green">541</FONT> /** Number of parameters. */<a name="line.541"></a> <FONT color="green">542</FONT> private final int k;<a name="line.542"></a> <FONT color="green">543</FONT> <a name="line.543"></a> <FONT color="green">544</FONT> /** Simple constructor.<a name="line.544"></a> <FONT color="green">545</FONT> * @param handler underlying step handler with jacobians<a name="line.545"></a> <FONT color="green">546</FONT> * @param n dimension of the original ODE<a name="line.546"></a> <FONT color="green">547</FONT> * @param k number of parameters<a name="line.547"></a> <FONT color="green">548</FONT> */<a name="line.548"></a> <FONT color="green">549</FONT> public StepHandlerWrapper(final StepHandlerWithJacobians handler,<a name="line.549"></a> <FONT color="green">550</FONT> final int n, final int k) {<a name="line.550"></a> <FONT color="green">551</FONT> this.handler = handler;<a name="line.551"></a> <FONT color="green">552</FONT> this.n = n;<a name="line.552"></a> <FONT color="green">553</FONT> this.k = k;<a name="line.553"></a> <FONT color="green">554</FONT> }<a name="line.554"></a> <FONT color="green">555</FONT> <a name="line.555"></a> <FONT color="green">556</FONT> /** Get the underlying step handler with jacobians.<a name="line.556"></a> <FONT color="green">557</FONT> * @return underlying step handler with jacobians<a name="line.557"></a> <FONT color="green">558</FONT> */<a name="line.558"></a> <FONT color="green">559</FONT> public StepHandlerWithJacobians getHandler() {<a name="line.559"></a> <FONT color="green">560</FONT> return handler;<a name="line.560"></a> <FONT color="green">561</FONT> }<a name="line.561"></a> <FONT color="green">562</FONT> <a name="line.562"></a> <FONT color="green">563</FONT> /** {@inheritDoc} */<a name="line.563"></a> <FONT color="green">564</FONT> public void handleStep(StepInterpolator interpolator, boolean isLast)<a name="line.564"></a> <FONT color="green">565</FONT> throws DerivativeException {<a name="line.565"></a> <FONT color="green">566</FONT> handler.handleStep(new StepInterpolatorWrapper(interpolator, n, k), isLast);<a name="line.566"></a> <FONT color="green">567</FONT> }<a name="line.567"></a> <FONT color="green">568</FONT> <a name="line.568"></a> <FONT color="green">569</FONT> /** {@inheritDoc} */<a name="line.569"></a> <FONT color="green">570</FONT> public boolean requiresDenseOutput() {<a name="line.570"></a> <FONT color="green">571</FONT> return handler.requiresDenseOutput();<a name="line.571"></a> <FONT color="green">572</FONT> }<a name="line.572"></a> <FONT color="green">573</FONT> <a name="line.573"></a> <FONT color="green">574</FONT> /** {@inheritDoc} */<a name="line.574"></a> <FONT color="green">575</FONT> public void reset() {<a name="line.575"></a> <FONT color="green">576</FONT> handler.reset();<a name="line.576"></a> <FONT color="green">577</FONT> }<a name="line.577"></a> <FONT color="green">578</FONT> <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> /** Wrapper for step interpolators. */<a name="line.581"></a> <FONT color="green">582</FONT> private static class StepInterpolatorWrapper<a name="line.582"></a> <FONT color="green">583</FONT> implements StepInterpolatorWithJacobians {<a name="line.583"></a> <FONT color="green">584</FONT> <a name="line.584"></a> <FONT color="green">585</FONT> /** Wrapped interpolator. */<a name="line.585"></a> <FONT color="green">586</FONT> private StepInterpolator interpolator;<a name="line.586"></a> <FONT color="green">587</FONT> <a name="line.587"></a> <FONT color="green">588</FONT> /** State array. */<a name="line.588"></a> <FONT color="green">589</FONT> private double[] y;<a name="line.589"></a> <FONT color="green">590</FONT> <a name="line.590"></a> <FONT color="green">591</FONT> /** Jacobian with respect to initial state dy/dy0. */<a name="line.591"></a> <FONT color="green">592</FONT> private double[][] dydy0;<a name="line.592"></a> <FONT color="green">593</FONT> <a name="line.593"></a> <FONT color="green">594</FONT> /** Jacobian with respect to parameters dy/dp. */<a name="line.594"></a> <FONT color="green">595</FONT> private double[][] dydp;<a name="line.595"></a> <FONT color="green">596</FONT> <a name="line.596"></a> <FONT color="green">597</FONT> /** Time derivative of the state array. */<a name="line.597"></a> <FONT color="green">598</FONT> private double[] yDot;<a name="line.598"></a> <FONT color="green">599</FONT> <a name="line.599"></a> <FONT color="green">600</FONT> /** Time derivative of the sacobian with respect to initial state dy/dy0. */<a name="line.600"></a> <FONT color="green">601</FONT> private double[][] dydy0Dot;<a name="line.601"></a> <FONT color="green">602</FONT> <a name="line.602"></a> <FONT color="green">603</FONT> /** Time derivative of the jacobian with respect to parameters dy/dp. */<a name="line.603"></a> <FONT color="green">604</FONT> private double[][] dydpDot;<a name="line.604"></a> <FONT color="green">605</FONT> <a name="line.605"></a> <FONT color="green">606</FONT> /** Simple constructor.<a name="line.606"></a> <FONT color="green">607</FONT> * <p>This constructor is used only for externalization. It does nothing.</p><a name="line.607"></a> <FONT color="green">608</FONT> */<a name="line.608"></a> <FONT color="green">609</FONT> @SuppressWarnings("unused")<a name="line.609"></a> <FONT color="green">610</FONT> public StepInterpolatorWrapper() {<a name="line.610"></a> <FONT color="green">611</FONT> }<a name="line.611"></a> <FONT color="green">612</FONT> <a name="line.612"></a> <FONT color="green">613</FONT> /** Simple constructor.<a name="line.613"></a> <FONT color="green">614</FONT> * @param interpolator wrapped interpolator<a name="line.614"></a> <FONT color="green">615</FONT> * @param n dimension of the original ODE<a name="line.615"></a> <FONT color="green">616</FONT> * @param k number of parameters<a name="line.616"></a> <FONT color="green">617</FONT> */<a name="line.617"></a> <FONT color="green">618</FONT> public StepInterpolatorWrapper(final StepInterpolator interpolator,<a name="line.618"></a> <FONT color="green">619</FONT> final int n, final int k) {<a name="line.619"></a> <FONT color="green">620</FONT> this.interpolator = interpolator;<a name="line.620"></a> <FONT color="green">621</FONT> y = new double[n];<a name="line.621"></a> <FONT color="green">622</FONT> dydy0 = new double[n][n];<a name="line.622"></a> <FONT color="green">623</FONT> dydp = new double[n][k];<a name="line.623"></a> <FONT color="green">624</FONT> yDot = new double[n];<a name="line.624"></a> <FONT color="green">625</FONT> dydy0Dot = new double[n][n];<a name="line.625"></a> <FONT color="green">626</FONT> dydpDot = new double[n][k];<a name="line.626"></a> <FONT color="green">627</FONT> }<a name="line.627"></a> <FONT color="green">628</FONT> <a name="line.628"></a> <FONT color="green">629</FONT> /** {@inheritDoc} */<a name="line.629"></a> <FONT color="green">630</FONT> public void setInterpolatedTime(double time) {<a name="line.630"></a> <FONT color="green">631</FONT> interpolator.setInterpolatedTime(time);<a name="line.631"></a> <FONT color="green">632</FONT> }<a name="line.632"></a> <FONT color="green">633</FONT> <a name="line.633"></a> <FONT color="green">634</FONT> /** {@inheritDoc} */<a name="line.634"></a> <FONT color="green">635</FONT> public boolean isForward() {<a name="line.635"></a> <FONT color="green">636</FONT> return interpolator.isForward();<a name="line.636"></a> <FONT color="green">637</FONT> }<a name="line.637"></a> <FONT color="green">638</FONT> <a name="line.638"></a> <FONT color="green">639</FONT> /** {@inheritDoc} */<a name="line.639"></a> <FONT color="green">640</FONT> public double getPreviousTime() {<a name="line.640"></a> <FONT color="green">641</FONT> return interpolator.getPreviousTime();<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> /** {@inheritDoc} */<a name="line.644"></a> <FONT color="green">645</FONT> public double getInterpolatedTime() {<a name="line.645"></a> <FONT color="green">646</FONT> return interpolator.getInterpolatedTime();<a name="line.646"></a> <FONT color="green">647</FONT> }<a name="line.647"></a> <FONT color="green">648</FONT> <a name="line.648"></a> <FONT color="green">649</FONT> /** {@inheritDoc} */<a name="line.649"></a> <FONT color="green">650</FONT> public double[] getInterpolatedY() throws DerivativeException {<a name="line.650"></a> <FONT color="green">651</FONT> double[] extendedState = interpolator.getInterpolatedState();<a name="line.651"></a> <FONT color="green">652</FONT> System.arraycopy(extendedState, 0, y, 0, y.length);<a name="line.652"></a> <FONT color="green">653</FONT> return y;<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> public double[][] getInterpolatedDyDy0() throws DerivativeException {<a name="line.657"></a> <FONT color="green">658</FONT> double[] extendedState = interpolator.getInterpolatedState();<a name="line.658"></a> <FONT color="green">659</FONT> final int n = y.length;<a name="line.659"></a> <FONT color="green">660</FONT> int start = n;<a name="line.660"></a> <FONT color="green">661</FONT> for (int i = 0; i < n; ++i) {<a name="line.661"></a> <FONT color="green">662</FONT> System.arraycopy(extendedState, start, dydy0[i], 0, n);<a name="line.662"></a> <FONT color="green">663</FONT> start += n;<a name="line.663"></a> <FONT color="green">664</FONT> }<a name="line.664"></a> <FONT color="green">665</FONT> return dydy0;<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> /** {@inheritDoc} */<a name="line.668"></a> <FONT color="green">669</FONT> public double[][] getInterpolatedDyDp() throws DerivativeException {<a name="line.669"></a> <FONT color="green">670</FONT> double[] extendedState = interpolator.getInterpolatedState();<a name="line.670"></a> <FONT color="green">671</FONT> final int n = y.length;<a name="line.671"></a> <FONT color="green">672</FONT> final int k = dydp[0].length;<a name="line.672"></a> <FONT color="green">673</FONT> int start = n * (n + 1);<a name="line.673"></a> <FONT color="green">674</FONT> for (int i = 0; i < n; ++i) {<a name="line.674"></a> <FONT color="green">675</FONT> System.arraycopy(extendedState, start, dydp[i], 0, k);<a name="line.675"></a> <FONT color="green">676</FONT> start += k;<a name="line.676"></a> <FONT color="green">677</FONT> }<a name="line.677"></a> <FONT color="green">678</FONT> return dydp;<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> /** {@inheritDoc} */<a name="line.681"></a> <FONT color="green">682</FONT> public double[] getInterpolatedYDot() throws DerivativeException {<a name="line.682"></a> <FONT color="green">683</FONT> double[] extendedDerivatives = interpolator.getInterpolatedDerivatives();<a name="line.683"></a> <FONT color="green">684</FONT> System.arraycopy(extendedDerivatives, 0, yDot, 0, yDot.length);<a name="line.684"></a> <FONT color="green">685</FONT> return yDot;<a name="line.685"></a> <FONT color="green">686</FONT> }<a name="line.686"></a> <FONT color="green">687</FONT> <a name="line.687"></a> <FONT color="green">688</FONT> /** {@inheritDoc} */<a name="line.688"></a> <FONT color="green">689</FONT> public double[][] getInterpolatedDyDy0Dot() throws DerivativeException {<a name="line.689"></a> <FONT color="green">690</FONT> double[] extendedDerivatives = interpolator.getInterpolatedDerivatives();<a name="line.690"></a> <FONT color="green">691</FONT> final int n = y.length;<a name="line.691"></a> <FONT color="green">692</FONT> int start = n;<a name="line.692"></a> <FONT color="green">693</FONT> for (int i = 0; i < n; ++i) {<a name="line.693"></a> <FONT color="green">694</FONT> System.arraycopy(extendedDerivatives, start, dydy0Dot[i], 0, n);<a name="line.694"></a> <FONT color="green">695</FONT> start += n;<a name="line.695"></a> <FONT color="green">696</FONT> }<a name="line.696"></a> <FONT color="green">697</FONT> return dydy0Dot;<a name="line.697"></a> <FONT color="green">698</FONT> }<a name="line.698"></a> <FONT color="green">699</FONT> <a name="line.699"></a> <FONT color="green">700</FONT> /** {@inheritDoc} */<a name="line.700"></a> <FONT color="green">701</FONT> public double[][] getInterpolatedDyDpDot() throws DerivativeException {<a name="line.701"></a> <FONT color="green">702</FONT> double[] extendedDerivatives = interpolator.getInterpolatedDerivatives();<a name="line.702"></a> <FONT color="green">703</FONT> final int n = y.length;<a name="line.703"></a> <FONT color="green">704</FONT> final int k = dydpDot[0].length;<a name="line.704"></a> <FONT color="green">705</FONT> int start = n * (n + 1);<a name="line.705"></a> <FONT color="green">706</FONT> for (int i = 0; i < n; ++i) {<a name="line.706"></a> <FONT color="green">707</FONT> System.arraycopy(extendedDerivatives, start, dydpDot[i], 0, k);<a name="line.707"></a> <FONT color="green">708</FONT> start += k;<a name="line.708"></a> <FONT color="green">709</FONT> }<a name="line.709"></a> <FONT color="green">710</FONT> return dydpDot;<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> /** {@inheritDoc} */<a name="line.713"></a> <FONT color="green">714</FONT> public double getCurrentTime() {<a name="line.714"></a> <FONT color="green">715</FONT> return interpolator.getCurrentTime();<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> /** {@inheritDoc} */<a name="line.718"></a> <FONT color="green">719</FONT> public StepInterpolatorWithJacobians copy() throws DerivativeException {<a name="line.719"></a> <FONT color="green">720</FONT> final int n = y.length;<a name="line.720"></a> <FONT color="green">721</FONT> final int k = dydp[0].length;<a name="line.721"></a> <FONT color="green">722</FONT> StepInterpolatorWrapper copied =<a name="line.722"></a> <FONT color="green">723</FONT> new StepInterpolatorWrapper(interpolator.copy(), n, k);<a name="line.723"></a> <FONT color="green">724</FONT> copyArray(y, copied.y);<a name="line.724"></a> <FONT color="green">725</FONT> copyArray(dydy0, copied.dydy0);<a name="line.725"></a> <FONT color="green">726</FONT> copyArray(dydp, copied.dydp);<a name="line.726"></a> <FONT color="green">727</FONT> copyArray(yDot, copied.yDot);<a name="line.727"></a> <FONT color="green">728</FONT> copyArray(dydy0Dot, copied.dydy0Dot);<a name="line.728"></a> <FONT color="green">729</FONT> copyArray(dydpDot, copied.dydpDot);<a name="line.729"></a> <FONT color="green">730</FONT> return copied;<a name="line.730"></a> <FONT color="green">731</FONT> }<a name="line.731"></a> <FONT color="green">732</FONT> <a name="line.732"></a> <FONT color="green">733</FONT> /** {@inheritDoc} */<a name="line.733"></a> <FONT color="green">734</FONT> public void writeExternal(ObjectOutput out) throws IOException {<a name="line.734"></a> <FONT color="green">735</FONT> out.writeObject(interpolator);<a name="line.735"></a> <FONT color="green">736</FONT> out.writeInt(y.length);<a name="line.736"></a> <FONT color="green">737</FONT> out.writeInt(dydp[0].length);<a name="line.737"></a> <FONT color="green">738</FONT> writeArray(out, y);<a name="line.738"></a> <FONT color="green">739</FONT> writeArray(out, dydy0);<a name="line.739"></a> <FONT color="green">740</FONT> writeArray(out, dydp);<a name="line.740"></a> <FONT color="green">741</FONT> writeArray(out, yDot);<a name="line.741"></a> <FONT color="green">742</FONT> writeArray(out, dydy0Dot);<a name="line.742"></a> <FONT color="green">743</FONT> writeArray(out, dydpDot);<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> public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {<a name="line.747"></a> <FONT color="green">748</FONT> interpolator = (StepInterpolator) in.readObject();<a name="line.748"></a> <FONT color="green">749</FONT> final int n = in.readInt();<a name="line.749"></a> <FONT color="green">750</FONT> final int k = in.readInt();<a name="line.750"></a> <FONT color="green">751</FONT> y = new double[n];<a name="line.751"></a> <FONT color="green">752</FONT> dydy0 = new double[n][n];<a name="line.752"></a> <FONT color="green">753</FONT> dydp = new double[n][k];<a name="line.753"></a> <FONT color="green">754</FONT> yDot = new double[n];<a name="line.754"></a> <FONT color="green">755</FONT> dydy0Dot = new double[n][n];<a name="line.755"></a> <FONT color="green">756</FONT> dydpDot = new double[n][k];<a name="line.756"></a> <FONT color="green">757</FONT> readArray(in, y);<a name="line.757"></a> <FONT color="green">758</FONT> readArray(in, dydy0);<a name="line.758"></a> <FONT color="green">759</FONT> readArray(in, dydp);<a name="line.759"></a> <FONT color="green">760</FONT> readArray(in, yDot);<a name="line.760"></a> <FONT color="green">761</FONT> readArray(in, dydy0Dot);<a name="line.761"></a> <FONT color="green">762</FONT> readArray(in, dydpDot);<a name="line.762"></a> <FONT color="green">763</FONT> }<a name="line.763"></a> <FONT color="green">764</FONT> <a name="line.764"></a> <FONT color="green">765</FONT> /** Copy an array.<a name="line.765"></a> <FONT color="green">766</FONT> * @param src source array<a name="line.766"></a> <FONT color="green">767</FONT> * @param dest destination array<a name="line.767"></a> <FONT color="green">768</FONT> */<a name="line.768"></a> <FONT color="green">769</FONT> private static void copyArray(final double[] src, final double[] dest) {<a name="line.769"></a> <FONT color="green">770</FONT> System.arraycopy(src, 0, dest, 0, src.length);<a name="line.770"></a> <FONT color="green">771</FONT> }<a name="line.771"></a> <FONT color="green">772</FONT> <a name="line.772"></a> <FONT color="green">773</FONT> /** Copy an array.<a name="line.773"></a> <FONT color="green">774</FONT> * @param src source array<a name="line.774"></a> <FONT color="green">775</FONT> * @param dest destination array<a name="line.775"></a> <FONT color="green">776</FONT> */<a name="line.776"></a> <FONT color="green">777</FONT> private static void copyArray(final double[][] src, final double[][] dest) {<a name="line.777"></a> <FONT color="green">778</FONT> for (int i = 0; i < src.length; ++i) {<a name="line.778"></a> <FONT color="green">779</FONT> copyArray(src[i], dest[i]);<a name="line.779"></a> <FONT color="green">780</FONT> }<a name="line.780"></a> <FONT color="green">781</FONT> }<a name="line.781"></a> <FONT color="green">782</FONT> <a name="line.782"></a> <FONT color="green">783</FONT> /** Write an array.<a name="line.783"></a> <FONT color="green">784</FONT> * @param out output stream<a name="line.784"></a> <FONT color="green">785</FONT> * @param array array to write<a name="line.785"></a> <FONT color="green">786</FONT> * @exception IOException if array cannot be read<a name="line.786"></a> <FONT color="green">787</FONT> */<a name="line.787"></a> <FONT color="green">788</FONT> private static void writeArray(final ObjectOutput out, final double[] array)<a name="line.788"></a> <FONT color="green">789</FONT> throws IOException {<a name="line.789"></a> <FONT color="green">790</FONT> for (int i = 0; i < array.length; ++i) {<a name="line.790"></a> <FONT color="green">791</FONT> out.writeDouble(array[i]);<a name="line.791"></a> <FONT color="green">792</FONT> }<a name="line.792"></a> <FONT color="green">793</FONT> }<a name="line.793"></a> <FONT color="green">794</FONT> <a name="line.794"></a> <FONT color="green">795</FONT> /** Write an array.<a name="line.795"></a> <FONT color="green">796</FONT> * @param out output stream<a name="line.796"></a> <FONT color="green">797</FONT> * @param array array to write<a name="line.797"></a> <FONT color="green">798</FONT> * @exception IOException if array cannot be read<a name="line.798"></a> <FONT color="green">799</FONT> */<a name="line.799"></a> <FONT color="green">800</FONT> private static void writeArray(final ObjectOutput out, final double[][] array)<a name="line.800"></a> <FONT color="green">801</FONT> throws IOException {<a name="line.801"></a> <FONT color="green">802</FONT> for (int i = 0; i < array.length; ++i) {<a name="line.802"></a> <FONT color="green">803</FONT> writeArray(out, array[i]);<a name="line.803"></a> <FONT color="green">804</FONT> }<a name="line.804"></a> <FONT color="green">805</FONT> }<a name="line.805"></a> <FONT color="green">806</FONT> <a name="line.806"></a> <FONT color="green">807</FONT> /** Read an array.<a name="line.807"></a> <FONT color="green">808</FONT> * @param in input stream<a name="line.808"></a> <FONT color="green">809</FONT> * @param array array to read<a name="line.809"></a> <FONT color="green">810</FONT> * @exception IOException if array cannot be read<a name="line.810"></a> <FONT color="green">811</FONT> */<a name="line.811"></a> <FONT color="green">812</FONT> private static void readArray(final ObjectInput in, final double[] array)<a name="line.812"></a> <FONT color="green">813</FONT> throws IOException {<a name="line.813"></a> <FONT color="green">814</FONT> for (int i = 0; i < array.length; ++i) {<a name="line.814"></a> <FONT color="green">815</FONT> array[i] = in.readDouble();<a name="line.815"></a> <FONT color="green">816</FONT> }<a name="line.816"></a> <FONT color="green">817</FONT> }<a name="line.817"></a> <FONT color="green">818</FONT> <a name="line.818"></a> <FONT color="green">819</FONT> /** Read an array.<a name="line.819"></a> <FONT color="green">820</FONT> * @param in input stream<a name="line.820"></a> <FONT color="green">821</FONT> * @param array array to read<a name="line.821"></a> <FONT color="green">822</FONT> * @exception IOException if array cannot be read<a name="line.822"></a> <FONT color="green">823</FONT> */<a name="line.823"></a> <FONT color="green">824</FONT> private static void readArray(final ObjectInput in, final double[][] array)<a name="line.824"></a> <FONT color="green">825</FONT> throws IOException {<a name="line.825"></a> <FONT color="green">826</FONT> for (int i = 0; i < array.length; ++i) {<a name="line.826"></a> <FONT color="green">827</FONT> readArray(in, array[i]);<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> <a name="line.830"></a> <FONT color="green">831</FONT> }<a name="line.831"></a> <FONT color="green">832</FONT> <a name="line.832"></a> <FONT color="green">833</FONT> /** Wrapper for event handlers. */<a name="line.833"></a> <FONT color="green">834</FONT> private static class EventHandlerWrapper implements EventHandler {<a name="line.834"></a> <FONT color="green">835</FONT> <a name="line.835"></a> <FONT color="green">836</FONT> /** Underlying event handler with jacobians. */<a name="line.836"></a> <FONT color="green">837</FONT> private final EventHandlerWithJacobians handler;<a name="line.837"></a> <FONT color="green">838</FONT> <a name="line.838"></a> <FONT color="green">839</FONT> /** State array. */<a name="line.839"></a> <FONT color="green">840</FONT> private double[] y;<a name="line.840"></a> <FONT color="green">841</FONT> <a name="line.841"></a> <FONT color="green">842</FONT> /** Jacobian with respect to initial state dy/dy0. */<a name="line.842"></a> <FONT color="green">843</FONT> private double[][] dydy0;<a name="line.843"></a> <FONT color="green">844</FONT> <a name="line.844"></a> <FONT color="green">845</FONT> /** Jacobian with respect to parameters dy/dp. */<a name="line.845"></a> <FONT color="green">846</FONT> private double[][] dydp;<a name="line.846"></a> <FONT color="green">847</FONT> <a name="line.847"></a> <FONT color="green">848</FONT> /** Simple constructor.<a name="line.848"></a> <FONT color="green">849</FONT> * @param handler underlying event handler with jacobians<a name="line.849"></a> <FONT color="green">850</FONT> * @param n dimension of the original ODE<a name="line.850"></a> <FONT color="green">851</FONT> * @param k number of parameters<a name="line.851"></a> <FONT color="green">852</FONT> */<a name="line.852"></a> <FONT color="green">853</FONT> public EventHandlerWrapper(final EventHandlerWithJacobians handler,<a name="line.853"></a> <FONT color="green">854</FONT> final int n, final int k) {<a name="line.854"></a> <FONT color="green">855</FONT> this.handler = handler;<a name="line.855"></a> <FONT color="green">856</FONT> y = new double[n];<a name="line.856"></a> <FONT color="green">857</FONT> dydy0 = new double[n][n];<a name="line.857"></a> <FONT color="green">858</FONT> dydp = new double[n][k];<a name="line.858"></a> <FONT color="green">859</FONT> }<a name="line.859"></a> <FONT color="green">860</FONT> <a name="line.860"></a> <FONT color="green">861</FONT> /** Get the underlying event handler with jacobians.<a name="line.861"></a> <FONT color="green">862</FONT> * @return underlying event handler with jacobians<a name="line.862"></a> <FONT color="green">863</FONT> */<a name="line.863"></a> <FONT color="green">864</FONT> public EventHandlerWithJacobians getHandler() {<a name="line.864"></a> <FONT color="green">865</FONT> return handler;<a name="line.865"></a> <FONT color="green">866</FONT> }<a name="line.866"></a> <FONT color="green">867</FONT> <a name="line.867"></a> <FONT color="green">868</FONT> /** {@inheritDoc} */<a name="line.868"></a> <FONT color="green">869</FONT> public int eventOccurred(double t, double[] z, boolean increasing)<a name="line.869"></a> <FONT color="green">870</FONT> throws EventException {<a name="line.870"></a> <FONT color="green">871</FONT> dispatchCompoundState(z, y, dydy0, dydp);<a name="line.871"></a> <FONT color="green">872</FONT> return handler.eventOccurred(t, y, dydy0, dydp, increasing);<a name="line.872"></a> <FONT color="green">873</FONT> }<a name="line.873"></a> <FONT color="green">874</FONT> <a name="line.874"></a> <FONT color="green">875</FONT> /** {@inheritDoc} */<a name="line.875"></a> <FONT color="green">876</FONT> public double g(double t, double[] z)<a name="line.876"></a> <FONT color="green">877</FONT> throws EventException {<a name="line.877"></a> <FONT color="green">878</FONT> dispatchCompoundState(z, y, dydy0, dydp);<a name="line.878"></a> <FONT color="green">879</FONT> return handler.g(t, y, dydy0, dydp);<a name="line.879"></a> <FONT color="green">880</FONT> }<a name="line.880"></a> <FONT color="green">881</FONT> <a name="line.881"></a> <FONT color="green">882</FONT> /** {@inheritDoc} */<a name="line.882"></a> <FONT color="green">883</FONT> public void resetState(double t, double[] z)<a name="line.883"></a> <FONT color="green">884</FONT> throws EventException {<a name="line.884"></a> <FONT color="green">885</FONT> dispatchCompoundState(z, y, dydy0, dydp);<a name="line.885"></a> <FONT color="green">886</FONT> handler.resetState(t, y, dydy0, dydp);<a name="line.886"></a> <FONT color="green">887</FONT> }<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> <a name="line.890"></a> <FONT color="green">891</FONT> }<a name="line.891"></a> </PRE> </BODY> </HTML>