001 /*
002 * Java Genetic Algorithm Library (jenetics-3.8.0).
003 * Copyright (c) 2007-2017 Franz Wilhelmstötter
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 * Author:
018 * Franz Wilhelmstötter (franz.wilhelmstoetter@gmx.at)
019 */
020 package org.jenetics.util;
021
022 import static java.lang.Double.doubleToLongBits;
023 import static java.lang.String.format;
024
025 import java.io.Serializable;
026
027 /**
028 * Double range class.
029 *
030 * @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
031 * @version 3.2
032 * @since 3.2
033 */
034 public final class DoubleRange implements Serializable {
035
036 private static final long serialVersionUID = 1L;
037
038 private final double _min;
039 private final double _max;
040
041 private DoubleRange(final double min, final double max) {
042 if (min > max) {
043 throw new IllegalArgumentException(format(
044 "Min greater than max: %s > %s", min, max
045 ));
046 }
047
048 _min = min;
049 _max = max;
050 }
051
052 /**
053 * Return the minimum value of the double range.
054 *
055 * @return the minimum value of the double range
056 */
057 public double getMin() {
058 return _min;
059 }
060
061 /**
062 * Return the maximum value of the double range.
063 *
064 * @return the maximum value of the double range
065 */
066 public double getMax() {
067 return _max;
068 }
069
070 /**
071 * Create a new {@code DoubleRange} object with the given {@code min} and
072 * {@code max} values.
073 *
074 * @param min the lower bound of the double range
075 * @param max the upper bound of the double range
076 * @return a new {@code DoubleRange} object
077 * @throws IllegalArgumentException if {@code min > max}
078 */
079 public static DoubleRange of(final double min, final double max) {
080 return new DoubleRange(min, max);
081 }
082
083 @Override
084 public int hashCode() {
085 return (int)(doubleToLongBits(_min) + 31*doubleToLongBits(_max));
086 }
087
088 @Override
089 public boolean equals(final Object other) {
090 return other instanceof DoubleRange &&
091 Double.compare(_min, ((DoubleRange)other)._min) == 0 &&
092 Double.compare(_max, ((DoubleRange)other)._max) == 0;
093 }
094
095 @Override
096 public String toString() {
097 return "[" + _min + ", " + _max + "]";
098 }
099
100 }
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