source: branches/HeuristicLab.BinPacking/HeuristicLab.Problems.BinPacking/3.3/Encodings/PackingSequence/Moves/Swap2/ExhaustiveSwap2MoveGenerator.cs @ 14128

Last change on this file since 14128 was 14128, checked in by gkronber, 5 years ago

#1966: refactoring of bin packing implementation

File size: 2.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 Joseph Helm and 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
22
23using System.Collections.Generic;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Encodings.PermutationEncoding;
27using HeuristicLab.Optimization;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29
30namespace HeuristicLab.Encodings.PackingEncoding.PackingSequence {
31  [Item("Exhaustive Swap2 Move Generator", "Generates all possible Swap Sequence moves from a given PackingSequence.")]
32  [StorableClass]
33  public class ExhaustiveSwap2MoveGenerator : Swap2MoveGenerator, IExhaustiveMoveGenerator {
34    [StorableConstructor]
35    protected ExhaustiveSwap2MoveGenerator(bool deserializing) : base(deserializing) { }
36    protected ExhaustiveSwap2MoveGenerator(ExhaustiveSwap2MoveGenerator original, Cloner cloner) : base(original, cloner) { }
37    public ExhaustiveSwap2MoveGenerator() : base() { }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new ExhaustiveSwap2MoveGenerator(this, cloner);
41    }
42    public static IEnumerable<Swap2Move> Generate(Permutation packingSequence, int nrOfBins) {
43      for (int i = 0; i < packingSequence.Length - 1; i++)
44        for (int j = i + 1; j < packingSequence.Length; j++) {
45          if (j != i)
46            yield return new Swap2Move(i, j, packingSequence);
47        }
48    }
49
50    public static Swap2Move[] Apply(Permutation packingSequence) {
51      int nrOfBins = 0;
52      foreach (int binNr in packingSequence) {
53        if (binNr > nrOfBins)
54          nrOfBins = binNr;
55      }
56      nrOfBins++;
57
58      int totalMoves = (packingSequence.Length * (packingSequence.Length - 1)) / 2;
59      Swap2Move[] moves = new Swap2Move[totalMoves];
60      int count = 0;
61      foreach (Swap2Move move in Generate(packingSequence, nrOfBins)) {
62        moves[count++] = move;
63      }
64      return moves;
65    }
66
67    protected override Swap2Move[] GenerateMoves(Permutation packingSequence) {
68      return Apply(packingSequence);
69    }
70  }
71}
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