| /* |
| * 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.math3.optimization; |
| |
| import org.apache.commons.math3.util.Precision; |
| |
| /** |
| * Base class for all convergence checker implementations. |
| * |
| * @param <PAIR> Type of (point, value) pair. |
| * |
| * @deprecated As of 3.1 (to be removed in 4.0). |
| * @since 3.0 |
| */ |
| @Deprecated |
| public abstract class AbstractConvergenceChecker<PAIR> |
| implements ConvergenceChecker<PAIR> { |
| /** |
| * Default relative threshold. |
| * @deprecated in 3.1 (to be removed in 4.0) because this value is too small |
| * to be useful as a default (cf. MATH-798). |
| */ |
| @Deprecated |
| private static final double DEFAULT_RELATIVE_THRESHOLD = 100 * Precision.EPSILON; |
| /** |
| * Default absolute threshold. |
| * @deprecated in 3.1 (to be removed in 4.0) because this value is too small |
| * to be useful as a default (cf. MATH-798). |
| */ |
| @Deprecated |
| private static final double DEFAULT_ABSOLUTE_THRESHOLD = 100 * Precision.SAFE_MIN; |
| /** |
| * Relative tolerance threshold. |
| */ |
| private final double relativeThreshold; |
| /** |
| * Absolute tolerance threshold. |
| */ |
| private final double absoluteThreshold; |
| |
| /** |
| * Build an instance with default thresholds. |
| * @deprecated in 3.1 (to be removed in 4.0). Convergence thresholds are |
| * problem-dependent. As this class is intended for users who want to set |
| * their own convergence criterion instead of relying on an algorithm's |
| * default procedure, they should also set the thresholds appropriately |
| * (cf. MATH-798). |
| */ |
| @Deprecated |
| public AbstractConvergenceChecker() { |
| this.relativeThreshold = DEFAULT_RELATIVE_THRESHOLD; |
| this.absoluteThreshold = DEFAULT_ABSOLUTE_THRESHOLD; |
| } |
| |
| /** |
| * Build an instance with a specified thresholds. |
| * |
| * @param relativeThreshold relative tolerance threshold |
| * @param absoluteThreshold absolute tolerance threshold |
| */ |
| public AbstractConvergenceChecker(final double relativeThreshold, |
| final double absoluteThreshold) { |
| this.relativeThreshold = relativeThreshold; |
| this.absoluteThreshold = absoluteThreshold; |
| } |
| |
| /** |
| * @return the relative threshold. |
| */ |
| public double getRelativeThreshold() { |
| return relativeThreshold; |
| } |
| |
| /** |
| * @return the absolute threshold. |
| */ |
| public double getAbsoluteThreshold() { |
| return absoluteThreshold; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public abstract boolean converged(int iteration, |
| PAIR previous, |
| PAIR current); |
| } |