source: branches/HeuristicLab.Analysis.AlgorithmBehavior/HeuristicLab.Analysis.SolutionCaching/3.3/PermutationEncoding/PermutationSolutionInformation.cs @ 10025

Last change on this file since 10025 was 10025, checked in by ascheibe, 6 years ago

#1886 added support for permutation encoding for solution caching

File size: 2.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Encodings.PermutationEncoding;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Analysis.SolutionCaching.PermutationEncoding {
29  [Item("PermutationSolutionInformation", "Displays information about a real vector solution.")]
30  [StorableClass]
31  public class PermutationSolutionInformation : SolutionInformation<Encodings.PermutationEncoding.Permutation> {
32    public PermutationSolutionInformation() {
33      ParentList = new List<Permutation>();
34    }
35    [StorableConstructor]
36    protected PermutationSolutionInformation(bool deserializing) : base(deserializing) { }
37
38    protected PermutationSolutionInformation(PermutationSolutionInformation original, Cloner cloner)
39      : base(original, cloner) {
40    }
41    public override IDeepCloneable Clone(Cloner cloner) {
42      return new PermutationSolutionInformation(this, cloner);
43    }
44
45    public override int GetHashCode() {
46      //use rotating hash, should be enough
47      //see: http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx
48      var pweq = new PermutationEqualityComparer();
49      int h = 0;
50
51      h = (h << 4) ^ (h >> 28) ^ ProducedBy.GetHashCode();
52      h = (h << 4) ^ (h >> 28) ^ Generation.GetHashCode();
53
54      if (ParentList != null) {
55        foreach (var parent in ParentList) {
56          h = (h << 4) ^ (h >> 28) ^ pweq.GetHashCode(parent);
57        }
58      }
59      return h;
60    }
61  }
62}
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