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Diffstat (limited to 'src/main/java/org/apache/commons/math3/optim/AbstractOptimizationProblem.java')
-rw-r--r-- | src/main/java/org/apache/commons/math3/optim/AbstractOptimizationProblem.java | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/optim/AbstractOptimizationProblem.java b/src/main/java/org/apache/commons/math3/optim/AbstractOptimizationProblem.java new file mode 100644 index 0000000..84da354 --- /dev/null +++ b/src/main/java/org/apache/commons/math3/optim/AbstractOptimizationProblem.java @@ -0,0 +1,102 @@ +/* + * 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.optim; + +import org.apache.commons.math3.exception.TooManyEvaluationsException; +import org.apache.commons.math3.exception.TooManyIterationsException; +import org.apache.commons.math3.util.Incrementor; + +/** + * Base class for implementing optimization problems. It contains the boiler-plate code for counting + * the number of evaluations of the objective function and the number of iterations of the + * algorithm, and storing the convergence checker. + * + * @param <PAIR> Type of the point/value pair returned by the optimization algorithm. + * @since 3.3 + */ +public abstract class AbstractOptimizationProblem<PAIR> implements OptimizationProblem<PAIR> { + + /** Callback to use for the evaluation counter. */ + private static final MaxEvalCallback MAX_EVAL_CALLBACK = new MaxEvalCallback(); + + /** Callback to use for the iteration counter. */ + private static final MaxIterCallback MAX_ITER_CALLBACK = new MaxIterCallback(); + + /** max evaluations */ + private final int maxEvaluations; + + /** max iterations */ + private final int maxIterations; + + /** Convergence checker. */ + private final ConvergenceChecker<PAIR> checker; + + /** + * Create an {@link AbstractOptimizationProblem} from the given data. + * + * @param maxEvaluations the number of allowed model function evaluations. + * @param maxIterations the number of allowed iterations. + * @param checker the convergence checker. + */ + protected AbstractOptimizationProblem( + final int maxEvaluations, + final int maxIterations, + final ConvergenceChecker<PAIR> checker) { + this.maxEvaluations = maxEvaluations; + this.maxIterations = maxIterations; + this.checker = checker; + } + + /** {@inheritDoc} */ + public Incrementor getEvaluationCounter() { + return new Incrementor(this.maxEvaluations, MAX_EVAL_CALLBACK); + } + + /** {@inheritDoc} */ + public Incrementor getIterationCounter() { + return new Incrementor(this.maxIterations, MAX_ITER_CALLBACK); + } + + /** {@inheritDoc} */ + public ConvergenceChecker<PAIR> getConvergenceChecker() { + return checker; + } + + /** Defines the action to perform when reaching the maximum number of evaluations. */ + private static class MaxEvalCallback implements Incrementor.MaxCountExceededCallback { + /** + * {@inheritDoc} + * + * @throws TooManyEvaluationsException + */ + public void trigger(int max) { + throw new TooManyEvaluationsException(max); + } + } + + /** Defines the action to perform when reaching the maximum number of evaluations. */ + private static class MaxIterCallback implements Incrementor.MaxCountExceededCallback { + /** + * {@inheritDoc} + * + * @throws TooManyIterationsException + */ + public void trigger(int max) { + throw new TooManyIterationsException(max); + } + } +} |