1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using HeuristicLab.Common;
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23 | using HeuristicLab.Core;
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24 | using HeuristicLab.Data;
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25 | using HeuristicLab.Operators;
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26 | using HeuristicLab.Optimization;
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27 | using HeuristicLab.Parameters;
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28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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29 |
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30 | namespace HeuristicLab.Encodings.RealVectorEncoding {
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31 | /// <summary>
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32 | /// A base class for operators that perform a crossover of real-valued vectors.
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33 | /// </summary>
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34 | [Item("RealVectorCrossover", "A base class for operators that perform a crossover of real-valued vectors.")]
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35 | [StorableClass]
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36 | public abstract class RealVectorCrossover : SingleSuccessorOperator, IRealVectorCrossover, IStochasticOperator {
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37 | public override bool CanChangeName {
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38 | get { return false; }
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39 | }
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40 |
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41 | public ILookupParameter<IRandom> RandomParameter {
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42 | get { return (LookupParameter<IRandom>)Parameters["Random"]; }
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43 | }
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44 | public ILookupParameter<ItemArray<RealVector>> ParentsParameter {
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45 | get { return (ScopeTreeLookupParameter<RealVector>)Parameters["Parents"]; }
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46 | }
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47 | public ILookupParameter<RealVector> ChildParameter {
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48 | get { return (ILookupParameter<RealVector>)Parameters["Child"]; }
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49 | }
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50 | public IValueLookupParameter<DoubleMatrix> BoundsParameter {
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51 | get { return (IValueLookupParameter<DoubleMatrix>)Parameters["Bounds"]; }
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52 | }
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53 |
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54 | [StorableConstructor]
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55 | protected RealVectorCrossover(bool deserializing) : base(deserializing) { }
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56 | protected RealVectorCrossover(RealVectorCrossover original, Cloner cloner) : base(original, cloner) { }
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57 | protected RealVectorCrossover()
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58 | : base() {
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59 | Parameters.Add(new LookupParameter<IRandom>("Random", "The pseudo random number generator which should be used for stochastic crossover operators."));
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60 | Parameters.Add(new ScopeTreeLookupParameter<RealVector>("Parents", "The parent vectors which should be crossed."));
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61 | ParentsParameter.ActualName = "RealVector";
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62 | Parameters.Add(new LookupParameter<RealVector>("Child", "The child vector resulting from the crossover."));
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63 | ChildParameter.ActualName = "RealVector";
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64 | Parameters.Add(new ValueLookupParameter<DoubleMatrix>("Bounds", "The lower and upper bounds of the real vector."));
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65 | }
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66 |
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67 | public sealed override IOperation Apply(IExecutionContext context) {
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68 | RealVector result = Cross(RandomParameter.ActualValue, ParentsParameter.ActualValue);
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69 | DoubleMatrix bounds = BoundsParameter.ActualValue;
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70 | if (bounds != null) BoundsChecker.Apply(result, bounds);
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71 | ChildParameter.ActualValue = result;
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72 | return base.Apply(context);
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73 | }
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74 |
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75 | protected abstract RealVector Cross(IRandom random, ItemArray<RealVector> parents);
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76 | }
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77 | }
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