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source: branches/2457_ExpertSystem/HeuristicLab.Encodings.LinearLinkageEncoding/3.4/Creators/RandomLinearLinkageCreator.cs @ 16956

Last change on this file since 16956 was 16956, checked in by abeham, 5 years ago

#2457: merged trunk into branch

File size: 2.2 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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
22using System;
23using System.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HEAL.Attic;
27
28namespace HeuristicLab.Encodings.LinearLinkageEncoding {
29  [Item("Random Linear Linkage Creator", "Creates a random linear linkage LLE encoded solution (similar to MaxGroups set to N).")]
30  [StorableType("A2B2881B-BFB6-4902-BE59-DBF26E27B498")]
31  public sealed class RandomLinearLinkageCreator : LinearLinkageCreator {
32
33    [StorableConstructor]
34    private RandomLinearLinkageCreator(StorableConstructorFlag _) : base(_) { }
35    private RandomLinearLinkageCreator(RandomLinearLinkageCreator original, Cloner cloner) : base(original, cloner) { }
36    public RandomLinearLinkageCreator() { }
37
38    public override IDeepCloneable Clone(Cloner cloner) {
39      return new RandomLinearLinkageCreator(this, cloner);
40    }
41
42    public static LinearLinkage Apply(IRandom random, int length) {
43      var groups = Enumerable.Range(0, length).Select(x => Tuple.Create(x, random.Next(length)))
44                                              .GroupBy(x => x.Item2)
45                                              .Select(x => x.Select(y => y.Item1).ToList());
46      return LinearLinkage.FromGroups(length, groups);
47    }
48
49    protected override LinearLinkage Create(IRandom random, int length) {
50      return Apply(random, length);
51    }
52  }
53}
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