01 /*
02 * Java Genetic Algorithm Library (jenetics-6.2.0).
03 * Copyright (c) 2007-2021 Franz Wilhelmstötter
04 *
05 * Licensed under the Apache License, Version 2.0 (the "License");
06 * you may not use this file except in compliance with the License.
07 * You may obtain a copy of the License at
08 *
09 * 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 * Author:
18 * Franz Wilhelmstötter (franz.wilhelmstoetter@gmail.com)
19 */
20 package io.jenetics;
21
22 import io.jenetics.util.Mean;
23
24 /**
25 * Alters a chromosome by replacing two genes by its mean value.
26 *
27 * <p>
28 * The order ({@link #order()}) of this recombination implementation is two.
29 * </p>
30 *
31 * @author <a href="mailto:franz.wilhelmstoetter@gmail.com">Franz Wilhelmstötter</a>
32 * @since 1.0
33 * @version 6.0
34 */
35 public class MeanAlterer<
36 G extends Gene<?, G> & Mean<G>,
37 C extends Comparable<? super C>
38 >
39 extends CombineAlterer<G, C>
40 {
41
42 /**
43 * Constructs an alterer with a given recombination probability.
44 *
45 * @param probability the crossover probability.
46 * @throws IllegalArgumentException if the {@code probability} is not in the
47 * valid range of {@code [0, 1]}.
48 */
49 public MeanAlterer(final double probability) {
50 super(Mean::mean, probability);
51 }
52
53 /**
54 * Create a new alterer with alter probability of {@code 0.05}.
55 */
56 public MeanAlterer() {
57 this(0.05);
58 }
59
60 }
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