| /* |
| * 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.userguide.genetics; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.math3.genetics.Chromosome; |
| import org.apache.commons.math3.genetics.MutationPolicy; |
| |
| public class RandomPolygonMutation implements MutationPolicy { |
| |
| private float mutationRate; |
| private float mutationAmount; |
| |
| public RandomPolygonMutation(float mutationRate, float mutationAmount) { |
| this.mutationRate = mutationRate; |
| this.mutationAmount = mutationAmount; |
| } |
| |
| public Chromosome mutate(Chromosome chromosome) { |
| if (!(chromosome instanceof PolygonChromosome)) { |
| throw new IllegalArgumentException(); |
| } |
| |
| PolygonChromosome polygons = (PolygonChromosome) chromosome; |
| List<Polygon> repr = polygons.getPolygonRepresentation(); |
| |
| List<Polygon> newRepr = new ArrayList<Polygon>(repr.size()); |
| for (Polygon p : repr) { |
| newRepr.add(p.mutate(mutationRate, mutationAmount)); |
| } |
| return new PolygonChromosome(newRepr); |
| } |
| } |