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source: branches/2893_BNLR/HeuristicLab.Encodings.LinearLinkageEncoding/3.4/Moves/EMSS/StochasticEMSSMultiMoveGenerator.cs @ 16654

Last change on this file since 16654 was 15583, checked in by swagner, 7 years ago

#2640: Updated year of copyrights in license headers

File size: 3.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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;
23using System.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30using HeuristicLab.Random;
31
32namespace HeuristicLab.Encodings.LinearLinkageEncoding {
33  [Item("StochasticEMSSMultiMoveGenerator", "Randomly samples n from all possible EMSS moves (extract, merge, shift, and split) from a given lle grouping.")]
34  [StorableClass]
35  public class StochasticEMSSMultiMoveGenerator : EMSSMoveGenerator, IMultiMoveGenerator, IStochasticOperator {
36    public ILookupParameter<IRandom> RandomParameter {
37      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
38    }
39    public IValueLookupParameter<IntValue> SampleSizeParameter {
40      get { return (IValueLookupParameter<IntValue>)Parameters["SampleSize"]; }
41    }
42
43    public IntValue SampleSize {
44      get { return SampleSizeParameter.Value; }
45      set { SampleSizeParameter.Value = value; }
46    }
47
48    [StorableConstructor]
49    protected StochasticEMSSMultiMoveGenerator(bool deserializing) : base(deserializing) { }
50    protected StochasticEMSSMultiMoveGenerator(StochasticEMSSMultiMoveGenerator original, Cloner cloner) : base(original, cloner) { }
51    public StochasticEMSSMultiMoveGenerator()
52      : base() {
53      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
54      Parameters.Add(new ValueLookupParameter<IntValue>("SampleSize", "The number of moves to generate."));
55    }
56
57    public override IDeepCloneable Clone(Cloner cloner) {
58      return new StochasticEMSSMultiMoveGenerator(this, cloner);
59    }
60
61    protected override EMSSMove[] GenerateMoves(LinearLinkage lle) {
62      int length = lle.Length;
63      if (length == 1) throw new ArgumentException("StochasticEMSSMultiMoveGenerator: There cannot be a move given only one item.", "lle");
64
65      var random = RandomParameter.ActualValue;
66      var sampleSize = SampleSizeParameter.ActualValue.Value;
67      return ExhaustiveEMSSMoveGenerator.Generate(lle).Shuffle(random).Take(sampleSize).ToArray();
68    }
69  }
70}
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