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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      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  package org.apache.commons.math.genetics;
18  
19  /**
20   * Policy used to create a pair of new chromosomes by performing a crossover
21   * operation on a source pair of chromosomes.
22   * 
23   * @since 2.0
24   * @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
25   */
26  public interface CrossoverPolicy {
27      /**
28       * Perform a crossover operation on the given chromosomes.
29       * 
30       * @param first the first chromosome.
31       * @param second the second chromosome.
32       * @return the pair of new chromosomes that resulted from the crossover.
33       */
34      ChromosomePair crossover(Chromosome first, Chromosome second);
35  }