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Commons Math example source code file (ConvergingAlgorithmImpl.java)

This example Commons Math source code file (ConvergingAlgorithmImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Math tags/keywords

convergingalgorithm, convergingalgorithm, convergingalgorithmimpl, convergingalgorithmimpl

The Commons Math ConvergingAlgorithmImpl.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.math;


/**
 * Provide a default implementation for several functions useful to generic
 * converging algorithms.
 *
 * @version $Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $
 * @since 2.0
 */
public abstract class ConvergingAlgorithmImpl implements ConvergingAlgorithm{

    /** Maximum absolute error. */
    protected double absoluteAccuracy;

    /** Maximum relative error. */
    protected double relativeAccuracy;

    /** Maximum number of iterations. */
    protected int maximalIterationCount;

    /** Default maximum absolute error. */
    protected double defaultAbsoluteAccuracy;

    /** Default maximum relative error. */
    protected double defaultRelativeAccuracy;

    /** Default maximum number of iterations. */
    protected int defaultMaximalIterationCount;

    // Mainly for test framework.
    /** The last iteration count. */
    protected int iterationCount;

    /**
     * Construct an algorithm with given iteration count and accuracy.
     *
     * @param defaultAbsoluteAccuracy maximum absolute error
     * @param defaultMaximalIterationCount maximum number of iterations
     * @throws IllegalArgumentException if f is null or the
     * defaultAbsoluteAccuracy is not valid
     */
    protected ConvergingAlgorithmImpl(final int defaultMaximalIterationCount,
                                      final double defaultAbsoluteAccuracy) {
        this.defaultAbsoluteAccuracy = defaultAbsoluteAccuracy;
        this.defaultRelativeAccuracy = 1.0e-14;
        this.absoluteAccuracy = defaultAbsoluteAccuracy;
        this.relativeAccuracy = defaultRelativeAccuracy;
        this.defaultMaximalIterationCount = defaultMaximalIterationCount;
        this.maximalIterationCount = defaultMaximalIterationCount;
        this.iterationCount = 0;
    }

    /** {@inheritDoc} */
    public int getIterationCount() {
        return iterationCount;
    }

    /** {@inheritDoc} */
    public void setAbsoluteAccuracy(double accuracy) {
        absoluteAccuracy = accuracy;
    }

    /** {@inheritDoc} */
    public double getAbsoluteAccuracy() {
        return absoluteAccuracy;
    }

    /** {@inheritDoc} */
    public void resetAbsoluteAccuracy() {
        absoluteAccuracy = defaultAbsoluteAccuracy;
    }

    /** {@inheritDoc} */
    public void setMaximalIterationCount(int count) {
        maximalIterationCount = count;
    }

    /** {@inheritDoc} */
    public int getMaximalIterationCount() {
        return maximalIterationCount;
    }

    /** {@inheritDoc} */
    public void resetMaximalIterationCount() {
        maximalIterationCount = defaultMaximalIterationCount;
    }

    /** {@inheritDoc} */
    public void setRelativeAccuracy(double accuracy) {
        relativeAccuracy = accuracy;
    }

    /** {@inheritDoc} */
    public double getRelativeAccuracy() {
        return relativeAccuracy;
    }

    /** {@inheritDoc} */
    public void resetRelativeAccuracy() {
        relativeAccuracy = defaultRelativeAccuracy;
    }

}

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