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Bugzilla #22002 from Brent W's patch - refactoring of UnivariateRealSolver 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/math/trunk@140989 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tim O'Brien 2003-07-30 22:06:37 +00:00
parent 233420ee6b
commit 5ba1bde434
2 changed files with 228 additions and 0 deletions
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118
src/java/org/apache/commons/math/analysis/UnivariateRealSolverFactoryImpl.java Normal file
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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.math.analysis;
/**
* A factory to easily get a default solver and some convenience
* functions.
* Because solvers are easily reusable, the factory does not
* store configuration data and creates preconfigured solvers
* (this may be controversial, because the configuration data
* may also be used for the default solver used by the static
* solve() method).
* @version $Revision: 1.1 $ $Date: 2003/07/30 22:06:37 $
*/
public class UnivariateRealSolverFactoryImpl
extends UnivariateRealSolverFactory {
/**
* Default constructor.
*/
UnivariateRealSolverFactoryImpl() {
}
/**
* Create a new {@link UnivariateRealSolver} for the given function. The
* actual solver returned is determined by the underlying factory.
*
* This factory returns a {@link BrentSolver} instance.
*
* @param f the function.
* @return the new solver.
*/
public UnivariateRealSolver newDefaultSolver(UnivariateRealFunction f) {
return newBrentSolver(f);
}
/**
* Create a new {@link UnivariateRealSolver} for the given function. The
* solver is an implementation of the bisection method.
* @param f the function.
* @return the new solver.
*/
public UnivariateRealSolver newBisectionSolver(UnivariateRealFunction f) {
return new BisectionSolver(f);
}
/**
* Create a new {@link UnivariateRealSolver} for the given function. The
* solver is an implementation of the Brent method.
* @param f the function.
* @return the new solver.
*/
public UnivariateRealSolver newBrentSolver(UnivariateRealFunction f) {
return new BrentSolver(f);
}
/**
* Create a new {@link UnivariateRealSolver} for the given function. The
* solver is an implementation of the secant method.
* @param f the function.
* @return the new solver.
*/
public UnivariateRealSolver newSecantSolver(UnivariateRealFunction f) {
return new SecantSolver(f);
}
}

110
src/java/org/apache/commons/math/analysis/UnivariateRealSolverUtil.java Normal file
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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.math.analysis;
import org.apache.commons.math.MathException;
/**
* @version $Revision: 1.1 $ $Date: 2003/07/30 22:06:37 $
* @todo add comment
*/
public class UnivariateRealSolverUtil {
/**
* Default constructor.
*/
private UnivariateRealSolverUtil() {
super();
}
/**
* Method to solve for zeros of real univariate functions. A
* default solver is created and used for solving.
* @param f the function.
* @param x0 the lower bound for the interval.
* @param x1 the upper bound for the interval.
* @return a value where the function is zero.
* @throws MathException if the iteration count was exceeded or the
* solver detects convergence problems otherwise.
*/
public static double solve(UnivariateRealFunction f, double x0, double x1)
throws MathException {
return UnivariateRealSolverFactory.newInstance().newDefaultSolver(f)
.solve(x0, x1);
}
/**
* Convience method to solve for zeros of real univariate functions. A
* default solver is created and used for solving.
* @param f the function.
* @param x0 the lower bound for the interval.
* @param x1 the upper bound for the interval.
* @param absoluteAccuracy the accuracy to be used by the solver.
* @return a value where the function is zero.
* @throws MathException if the iteration count was exceeded or the
* solver detects convergence problems otherwise.
*/
public static double solve(
UnivariateRealFunction f,
double x0,
double x1,
double absoluteAccuracy)
throws MathException {
UnivariateRealSolver solver = UnivariateRealSolverFactory.newInstance()
.newDefaultSolver(f);
solver.setAbsoluteAccuracy(absoluteAccuracy);
return solver.solve(x0, x1);
}
}