source: branches/MemPRAlgorithm/HeuristicLab.Encodings.LinearLinkageEncoding/3.4/Moves/ExtractMove.cs @ 14492

Last change on this file since 14492 was 14492, checked in by abeham, 4 years ago

#2701:

  • Updated LLE encoding
    • Made folder for version 3.4
    • Added conversion from and to LLE-b representation (back-links)
    • Updated moves and movegenerator to replace bidirectionaldictionary with LLE-b representation
  • Updated MemPR (linear linkage)
    • Updated tabu walk
  • Added test for conversion between LLE-e and LLE and LLE-b and LLE
  • Updated test for move apply/undo and added test for applying in sequence
File size: 2.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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;
23
24namespace HeuristicLab.Encodings.LinearLinkageEncoding {
25  public class ExtractMove : Move {
26    public int PreviousItem { get; private set; }
27    public int NextItem { get; private set; }
28
29    private bool IsFirst { get { return PreviousItem == Item; } }
30    private bool IsLast { get { return NextItem == Item; } }
31
32    public ExtractMove(int item, int prev, int next) {
33      Item = item;
34      PreviousItem = prev;
35      NextItem = next;
36    }
37
38    public override void Apply(LinearLinkage lle) {
39      if ((!IsFirst && lle[PreviousItem] != Item)
40        || lle[Item] != NextItem)
41        throw new ArgumentException("Move conditions have changed!");
42      if (!IsFirst) lle[PreviousItem] = IsLast ? PreviousItem : NextItem;
43      lle[Item] = Item;
44    }
45
46    public override void Undo(LinearLinkage lle) {
47      if (!IsFirst && lle[PreviousItem] != (IsLast ? PreviousItem : NextItem)
48        || lle[Item] != Item)
49        throw new ArgumentException("Move conditions have changed, cannot undo move.");
50
51      if (!IsFirst) lle[PreviousItem] = Item;
52      lle[Item] = NextItem;
53    }
54
55    public override void ApplyToLLEb(int[] lleb) {
56      if (!IsLast) lleb[NextItem] = IsFirst ? NextItem : PreviousItem;
57      lleb[Item] = Item;
58    }
59  }
60}
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