| /* |
| * 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.math4.optim; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Simple optimization constraints: lower and upper bounds. |
| * The valid range of the parameters is an interval that can be infinite |
| * (in one or both directions). |
| * <br> |
| * Immutable class. |
| * |
| * @since 3.1 |
| */ |
| public class SimpleBounds implements OptimizationData { |
| /** Lower bounds. */ |
| private final double[] lower; |
| /** Upper bounds. */ |
| private final double[] upper; |
| |
| /** |
| * @param lB Lower bounds. |
| * @param uB Upper bounds. |
| */ |
| public SimpleBounds(double[] lB, |
| double[] uB) { |
| lower = lB.clone(); |
| upper = uB.clone(); |
| } |
| |
| /** |
| * Gets the lower bounds. |
| * |
| * @return the lower bounds. |
| */ |
| public double[] getLower() { |
| return lower.clone(); |
| } |
| /** |
| * Gets the upper bounds. |
| * |
| * @return the upper bounds. |
| */ |
| public double[] getUpper() { |
| return upper.clone(); |
| } |
| |
| /** |
| * Factory method that creates instance of this class that represents |
| * unbounded ranges. |
| * |
| * @param dim Number of parameters. |
| * @return a new instance suitable for passing to an optimizer that |
| * requires bounds specification. |
| */ |
| public static SimpleBounds unbounded(int dim) { |
| final double[] lB = new double[dim]; |
| Arrays.fill(lB, Double.NEGATIVE_INFINITY); |
| final double[] uB = new double[dim]; |
| Arrays.fill(uB, Double.POSITIVE_INFINITY); |
| |
| return new SimpleBounds(lB, uB); |
| } |
| } |