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source: trunk/sources/HeuristicLab.Problems.Knapsack/3.3/MoveEvaluators/KnapsackOneBitflipMoveEvaluator.cs @ 13904

Last change on this file since 13904 was 12012, checked in by ascheibe, 10 years ago

#2212 merged r12008, r12009, r12010 back into trunk

File size: 2.9 KB
Line 
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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Encodings.BinaryVectorEncoding;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Problems.Knapsack {
30  /// <summary>
31  /// An operator to evaluate one bitflip moves.
32  /// </summary>
33  [Item("KnapsackOneBitflipMoveEvaluator", "Base class for evaluating one bitflip moves.")]
34  [StorableClass]
35  public class KnapsackOneBitflipMoveEvaluator : KnapsackMoveEvaluator, IOneBitflipMoveOperator {
36    public ILookupParameter<OneBitflipMove> OneBitflipMoveParameter {
37      get { return (ILookupParameter<OneBitflipMove>)Parameters["OneBitflipMove"]; }
38    }
39
40    [StorableConstructor]
41    protected KnapsackOneBitflipMoveEvaluator(bool deserializing) : base(deserializing) { }
42    protected KnapsackOneBitflipMoveEvaluator(KnapsackOneBitflipMoveEvaluator original, Cloner cloner) : base(original, cloner) { }
43    public KnapsackOneBitflipMoveEvaluator()
44      : base() {
45      Parameters.Add(new LookupParameter<OneBitflipMove>("OneBitflipMove", "The move to evaluate."));
46    }
47
48    public override IDeepCloneable Clone(Cloner cloner) {
49      return new KnapsackOneBitflipMoveEvaluator(this, cloner);
50    }
51
52    public override IOperation Apply() {
53      BinaryVector binaryVector = BinaryVectorParameter.ActualValue;
54      OneBitflipMove move = OneBitflipMoveParameter.ActualValue;
55
56      BinaryVector newSolution = new BinaryVector(binaryVector);
57      newSolution[move.Index] = !newSolution[move.Index];
58
59      DoubleValue quality = KnapsackEvaluator.Apply(newSolution,
60        KnapsackCapacityParameter.ActualValue,
61        PenaltyParameter.ActualValue,
62        WeightsParameter.ActualValue,
63        ValuesParameter.ActualValue).Quality;
64
65      double moveQuality = quality.Value;
66
67      if (MoveQualityParameter.ActualValue == null) MoveQualityParameter.ActualValue = new DoubleValue(moveQuality);
68      else MoveQualityParameter.ActualValue.Value = moveQuality;
69      return base.Apply();
70    }
71  }
72}
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