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source: trunk/HeuristicLab.Encodings.PermutationEncoding/3.3/Manipulators/InsertionManipulator.cs @ 17398

Last change on this file since 17398 was 17180, checked in by swagner, 5 years ago

#2875: Removed years in copyrights

File size: 3.2 KB
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[2]1#region License Information
2/* HeuristicLab
[17180]3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[2]4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
[4722]22using HeuristicLab.Common;
[2]23using HeuristicLab.Core;
[16565]24using HEAL.Attic;
[2]25
[3053]26namespace HeuristicLab.Encodings.PermutationEncoding {
[850]27  /// <summary>
28  /// Manipulates a permutation array by moving randomly one element to another position in the array.
[2854]29  /// </summary>
30  /// <remarks>
[2871]31  /// It is implemented as described in Fogel, D.B. (1988). An Evolutionary Approach to the Traveling Salesman Problem, Biological Cybernetics, 60, pp. 139-144.
[2854]32  /// </remarks>
[3340]33  [Item("InsertionManipulator", "An operator which moves randomly one element to another position in the permutation (Insertion is a special case of Translocation). It is implemented as described in Fogel, D.B. (1988). An Evolutionary Approach to the Traveling Salesman Problem, Biological Cybernetics, 60, pp. 139-144.")]
[16565]34  [StorableType("E8C09728-ACB7-491B-B87C-BE8E2B5A5B0B")]
[2854]35  public class InsertionManipulator : PermutationManipulator {
[4722]36    [StorableConstructor]
[16565]37    protected InsertionManipulator(StorableConstructorFlag _) : base(_) { }
[4722]38    protected InsertionManipulator(InsertionManipulator original, Cloner cloner) : base(original, cloner) { }
39    public InsertionManipulator() : base() { }
40
41    public override IDeepCloneable Clone(Cloner cloner) {
42      return new InsertionManipulator(this, cloner);
43    }
44
[850]45    /// <summary>
46    /// Moves an randomly chosen element in the specified <paramref name="permutation"/> array
47    /// to another randomly generated position.
48    /// </summary>
49    /// <param name="random">The random number generator.</param>
[2854]50    /// <param name="permutation">The permutation to manipulate.</param>
51    public static void Apply(IRandom random, Permutation permutation) {
[14662]52      var cutIndex = random.Next(permutation.Length);
53      var insertIndex = random.Next(permutation.Length);
[2]54
[14662]55      if (cutIndex == insertIndex) return;
[2]56
[14662]57      permutation.Move(cutIndex, cutIndex, insertIndex);
[2]58    }
59
[850]60    /// <summary>
61    /// Moves an randomly chosen element in the specified <paramref name="permutation"/> array
62    /// to another randomly generated position.
63    /// </summary>
64    /// <remarks>Calls <see cref="Apply"/>.</remarks>
[2854]65    /// <param name="random">A random number generator.</param>
66    /// <param name="permutation">The permutation to manipulate.</param>
67    protected override void Manipulate(IRandom random, Permutation permutation) {
68      Apply(random, permutation);
[2]69    }
70  }
71}
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