1  #region License Information


2  /* HeuristicLab


3  * Copyright (C) 20022019 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  using HeuristicLab.Common;


23  using HeuristicLab.Core;


24  using HeuristicLab.Data;


25  using HeuristicLab.Optimization;


26  using HeuristicLab.Parameters;


27  using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;


28 


29  namespace HeuristicLab.Encodings.PermutationEncoding {


30  [Item("StochasticSwap2MultiMoveGenerator", "Randomly samples n from all possible swap2 moves from a given permutation.")]


31  [StorableClass]


32  public class StochasticSwap2MultiMoveGenerator : Swap2MoveGenerator, IMultiMoveGenerator, IStochasticOperator {


33  public ILookupParameter<IRandom> RandomParameter {


34  get { return (ILookupParameter<IRandom>)Parameters["Random"]; }


35  }


36  public IValueLookupParameter<IntValue> SampleSizeParameter {


37  get { return (IValueLookupParameter<IntValue>)Parameters["SampleSize"]; }


38  }


39 


40  public IntValue SampleSize {


41  get { return SampleSizeParameter.Value; }


42  set { SampleSizeParameter.Value = value; }


43  }


44 


45  [StorableConstructor]


46  protected StochasticSwap2MultiMoveGenerator(bool deserializing) : base(deserializing) { }


47  protected StochasticSwap2MultiMoveGenerator(StochasticSwap2MultiMoveGenerator original, Cloner cloner) : base(original, cloner) { }


48  public StochasticSwap2MultiMoveGenerator()


49  : base() {


50  Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));


51  Parameters.Add(new ValueLookupParameter<IntValue>("SampleSize", "The number of moves to generate."));


52  }


53 


54  public override IDeepCloneable Clone(Cloner cloner) {


55  return new StochasticSwap2MultiMoveGenerator(this, cloner);


56  }


57 


58  public static Swap2Move[] Apply(Permutation permutation, IRandom random, int sampleSize) {


59  int length = permutation.Length;


60  Swap2Move[] moves = new Swap2Move[sampleSize];


61  for (int i = 0; i < sampleSize; i++) {


62  moves[i] = StochasticSwap2SingleMoveGenerator.Apply(permutation, random);


63  }


64  return moves;


65  }


66 


67  protected override Swap2Move[] GenerateMoves(Permutation permutation) {


68  IRandom random = RandomParameter.ActualValue;


69  return Apply(permutation, random, SampleSizeParameter.ActualValue.Value);


70  }


71  }


72  }

