[8319] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[14185] | 3 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[8319] | 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.Parameters;
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[14927] | 27 | using HeuristicLab.Persistence;
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[8319] | 28 |
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| 29 | namespace HeuristicLab.Optimization.Operators {
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| 30 | /// <summary>
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| 31 | /// A base class for operators that perform path relinking between single objective solutions.
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| 32 | /// </summary>
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| 33 | [Item("SingleObjectivePathRelinker", "A base class for operators that perform path relinking between single objective solutions.")]
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[14927] | 34 | [StorableType("1abbf66e-7675-4161-8b43-fde4866e9cdc")]
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[8319] | 35 | public abstract class SingleObjectivePathRelinker : SingleSuccessorOperator, ISingleObjectivePathRelinker {
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| 36 | #region Parameter properties
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| 37 | public ScopeParameter CurrentScopeParameter {
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| 38 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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| 39 | }
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| 40 | public ILookupParameter<ItemArray<IItem>> ParentsParameter {
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| 41 | get { return (IScopeTreeLookupParameter<IItem>)Parameters["Parents"]; }
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| 42 | }
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| 43 | public IValueParameter<PercentValue> RelinkingAccuracyParameter {
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| 44 | get { return (IValueParameter<PercentValue>)Parameters["RelinkingAccuracy"]; }
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| 45 | }
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| 46 | #endregion
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| 47 |
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| 48 | #region Properties
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| 49 | private IScope CurrentScope {
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| 50 | get { return CurrentScopeParameter.ActualValue; }
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| 51 | }
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| 52 | private ItemArray<IItem> Parents {
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| 53 | get { return ParentsParameter.ActualValue; }
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| 54 | }
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| 55 | private PercentValue RelinkingAccuracy {
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| 56 | get { return RelinkingAccuracyParameter.Value; }
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| 57 | }
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| 58 | #endregion
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| 59 |
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| 60 | [StorableConstructor]
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[15018] | 61 | protected SingleObjectivePathRelinker(StorableConstructorFlag deserializing) : base(deserializing) { }
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[8319] | 62 | protected SingleObjectivePathRelinker(SingleObjectivePathRelinker original, Cloner cloner) : base(original, cloner) { }
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| 63 | protected SingleObjectivePathRelinker()
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| 64 | : base() {
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| 65 | #region Create parameters
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| 66 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope that contains the parents."));
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| 67 | Parameters.Add(new ScopeTreeLookupParameter<IItem>("Parents", "The parents used for path relinking."));
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| 68 | Parameters.Add(new ValueParameter<PercentValue>("RelinkingAccuracy", "The percentage of relinked offspring that should be yielded.", new PercentValue(0.25)));
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| 69 | #endregion
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| 70 | }
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| 71 |
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| 72 | public sealed override IOperation Apply() {
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| 73 | ItemArray<IItem> relinkedSolutions = Relink(Parents, RelinkingAccuracy);
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| 74 | var offspringScope = new Scope("Offspring");
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| 75 | foreach (var solution in relinkedSolutions) {
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| 76 | var scope = new Scope();
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| 77 | scope.Variables.Add(new Variable(ParentsParameter.ActualName, solution));
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| 78 | offspringScope.SubScopes.Add(scope);
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| 79 | }
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| 80 | CurrentScope.SubScopes.Add(offspringScope);
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| 81 | return base.Apply();
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| 82 | }
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| 83 |
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| 84 | protected abstract ItemArray<IItem> Relink(ItemArray<IItem> parents, PercentValue n);
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| 85 | }
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| 86 | }
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