source: stable/HeuristicLab.Optimization.Operators/3.3/UnidirectionalRingMigrator.cs @ 12009

Last change on this file since 12009 was 12009, checked in by ascheibe, 7 years ago

#2212 updated copyright year

File size: 3.1 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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.Operators;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Optimization.Operators {
29  /// <summary>
30  /// Operator that migrates the selected sub scopes in each subscope in an unidirectional ring.
31  /// </summary>
32  [Item("UnidirectionalRingMigrator", "Migrates the selected sub scopes in each subscope in an unidirectional ring.")]
33  [StorableClass]
34  public class UnidirectionalRingMigrator : SingleSuccessorOperator, IMigrator {
35    [StorableConstructor]
36    protected UnidirectionalRingMigrator(bool deserializing) : base(deserializing) { }
37    protected UnidirectionalRingMigrator(UnidirectionalRingMigrator original, Cloner cloner) : base(original, cloner) { }
38    public UnidirectionalRingMigrator() : base() { }
39
40    public override IDeepCloneable Clone(Cloner cloner) {
41      return new UnidirectionalRingMigrator(this, cloner);
42    }
43
44    /// <summary>
45    /// Migrates every first sub scope of each child to its left neighbour (like a ring).
46    /// <pre>                                                               
47    ///          __ scope __              __ scope __
48    ///         /     |     \            /     |     \
49    ///       Pop1   Pop2   Pop3  =>   Pop1   Pop2   Pop3
50    ///       / \    / \    / \        / \    / \    / \
51    ///      R   S  R   S  R   S      R   S  R   S  R   S
52    ///     /|\  | /|\  | /|\  |     /|\  | /|\  | /|\  |
53    ///     ABC  A DEF  D GHI  G     ABC  G DEF  A GHI  D
54    /// </pre>
55    /// </summary>
56    /// <returns>The next operation.</returns>
57    public override IOperation Apply() {
58      IScope scope = ExecutionContext.Scope;
59      List<IScope> emigrantsList = new List<IScope>();
60
61      for (int i = 0; i < scope.SubScopes.Count; i++) {
62        IScope emigrants = scope.SubScopes[i].SubScopes[1];
63        scope.SubScopes[i].SubScopes.Remove(emigrants);
64        emigrantsList.Add(emigrants);
65      }
66
67      // shift first emigrants to end of list
68      emigrantsList.Add(emigrantsList[0]);
69      emigrantsList.RemoveAt(0);
70
71      for (int i = 0; i < scope.SubScopes.Count; i++)
72        scope.SubScopes[i].SubScopes.Add(emigrantsList[i]);
73
74      return base.Apply();
75    }
76  }
77}
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