Raymond | dee0849 | 2015-04-02 10:43:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | * contributor license agreements. See the NOTICE file distributed with |
| 4 | * this work for additional information regarding copyright ownership. |
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | * (the "License"); you may not use this file except in compliance with |
| 7 | * the License. You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | package org.apache.commons.math; |
| 19 | |
| 20 | /** |
| 21 | * Provide a default implementation for several functions useful to generic |
| 22 | * converging algorithms. |
| 23 | * |
| 24 | * @version $Revision: 1062691 $ $Date: 2011-01-24 10:12:47 +0100 (lun. 24 janv. 2011) $ |
| 25 | * @since 2.0 |
| 26 | * @deprecated in 2.2 (to be removed in 3.0). |
| 27 | */ |
| 28 | public abstract class ConvergingAlgorithmImpl implements ConvergingAlgorithm { |
| 29 | |
| 30 | /** Maximum absolute error. */ |
| 31 | protected double absoluteAccuracy; |
| 32 | |
| 33 | /** Maximum relative error. */ |
| 34 | protected double relativeAccuracy; |
| 35 | |
| 36 | /** Maximum number of iterations. */ |
| 37 | protected int maximalIterationCount; |
| 38 | |
| 39 | /** Default maximum absolute error. */ |
| 40 | protected double defaultAbsoluteAccuracy; |
| 41 | |
| 42 | /** Default maximum relative error. */ |
| 43 | protected double defaultRelativeAccuracy; |
| 44 | |
| 45 | /** Default maximum number of iterations. */ |
| 46 | protected int defaultMaximalIterationCount; |
| 47 | |
| 48 | /** The last iteration count. */ |
| 49 | protected int iterationCount; |
| 50 | |
| 51 | /** |
| 52 | * Construct an algorithm with given iteration count and accuracy. |
| 53 | * |
| 54 | * @param defaultAbsoluteAccuracy maximum absolute error |
| 55 | * @param defaultMaximalIterationCount maximum number of iterations |
| 56 | * @throws IllegalArgumentException if f is null or the |
| 57 | * defaultAbsoluteAccuracy is not valid |
| 58 | * @deprecated in 2.2. Derived classes should use the "setter" methods |
| 59 | * in order to assign meaningful values to all the instances variables. |
| 60 | */ |
| 61 | @Deprecated |
| 62 | protected ConvergingAlgorithmImpl(final int defaultMaximalIterationCount, |
| 63 | final double defaultAbsoluteAccuracy) { |
| 64 | this.defaultAbsoluteAccuracy = defaultAbsoluteAccuracy; |
| 65 | this.defaultRelativeAccuracy = 1.0e-14; |
| 66 | this.absoluteAccuracy = defaultAbsoluteAccuracy; |
| 67 | this.relativeAccuracy = defaultRelativeAccuracy; |
| 68 | this.defaultMaximalIterationCount = defaultMaximalIterationCount; |
| 69 | this.maximalIterationCount = defaultMaximalIterationCount; |
| 70 | this.iterationCount = 0; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Default constructor. |
| 75 | * |
| 76 | * @since 2.2 |
| 77 | * @deprecated in 2.2 (to be removed as soon as the single non-default one |
| 78 | * has been removed). |
| 79 | */ |
| 80 | @Deprecated |
| 81 | protected ConvergingAlgorithmImpl() {} |
| 82 | |
| 83 | /** {@inheritDoc} */ |
| 84 | public int getIterationCount() { |
| 85 | return iterationCount; |
| 86 | } |
| 87 | |
| 88 | /** {@inheritDoc} */ |
| 89 | public void setAbsoluteAccuracy(double accuracy) { |
| 90 | absoluteAccuracy = accuracy; |
| 91 | } |
| 92 | |
| 93 | /** {@inheritDoc} */ |
| 94 | public double getAbsoluteAccuracy() { |
| 95 | return absoluteAccuracy; |
| 96 | } |
| 97 | |
| 98 | /** {@inheritDoc} */ |
| 99 | public void resetAbsoluteAccuracy() { |
| 100 | absoluteAccuracy = defaultAbsoluteAccuracy; |
| 101 | } |
| 102 | |
| 103 | /** {@inheritDoc} */ |
| 104 | public void setMaximalIterationCount(int count) { |
| 105 | maximalIterationCount = count; |
| 106 | } |
| 107 | |
| 108 | /** {@inheritDoc} */ |
| 109 | public int getMaximalIterationCount() { |
| 110 | return maximalIterationCount; |
| 111 | } |
| 112 | |
| 113 | /** {@inheritDoc} */ |
| 114 | public void resetMaximalIterationCount() { |
| 115 | maximalIterationCount = defaultMaximalIterationCount; |
| 116 | } |
| 117 | |
| 118 | /** {@inheritDoc} */ |
| 119 | public void setRelativeAccuracy(double accuracy) { |
| 120 | relativeAccuracy = accuracy; |
| 121 | } |
| 122 | |
| 123 | /** {@inheritDoc} */ |
| 124 | public double getRelativeAccuracy() { |
| 125 | return relativeAccuracy; |
| 126 | } |
| 127 | |
| 128 | /** {@inheritDoc} */ |
| 129 | public void resetRelativeAccuracy() { |
| 130 | relativeAccuracy = defaultRelativeAccuracy; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Reset the iterations counter to 0. |
| 135 | * |
| 136 | * @since 2.2 |
| 137 | */ |
| 138 | protected void resetIterationsCounter() { |
| 139 | iterationCount = 0; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Increment the iterations counter by 1. |
| 144 | * |
| 145 | * @throws MaxIterationsExceededException if the maximal number |
| 146 | * of iterations is exceeded. |
| 147 | * @since 2.2 |
| 148 | */ |
| 149 | protected void incrementIterationsCounter() |
| 150 | throws MaxIterationsExceededException { |
| 151 | if (++iterationCount > maximalIterationCount) { |
| 152 | throw new MaxIterationsExceededException(maximalIterationCount); |
| 153 | } |
| 154 | } |
| 155 | } |