#region License Information /* HeuristicLab * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Data; using HeuristicLab.Operators; using HeuristicLab.Parameters; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Optimization.Operators { /// /// A base class for operators that perform path relinking between single objective solutions. /// [Item("SingleObjectivePathRelinker", "A base class for operators that perform path relinking between single objective solutions.")] [StorableClass] public abstract class SingleObjectivePathRelinker : SingleSuccessorOperator, ISingleObjectivePathRelinker { #region Parameter properties public ScopeParameter CurrentScopeParameter { get { return (ScopeParameter)Parameters["CurrentScope"]; } } public ILookupParameter> ParentsParameter { get { return (IScopeTreeLookupParameter)Parameters["Parents"]; } } public IValueParameter RelinkingAccuracyParameter { get { return (IValueParameter)Parameters["RelinkingAccuracy"]; } } #endregion #region Properties private IScope CurrentScope { get { return CurrentScopeParameter.ActualValue; } } private ItemArray Parents { get { return ParentsParameter.ActualValue; } } private PercentValue RelinkingAccuracy { get { return RelinkingAccuracyParameter.Value; } } #endregion [StorableConstructor] protected SingleObjectivePathRelinker(bool deserializing) : base(deserializing) { } protected SingleObjectivePathRelinker(SingleObjectivePathRelinker original, Cloner cloner) : base(original, cloner) { } protected SingleObjectivePathRelinker() : base() { #region Create parameters Parameters.Add(new ScopeParameter("CurrentScope", "The current scope that contains the parents.")); Parameters.Add(new ScopeTreeLookupParameter("Parents", "The parents used for path relinking.")); Parameters.Add(new ValueParameter("RelinkingAccuracy", "The percentage of relinked offspring that should be yielded.", new PercentValue(0.25))); #endregion } public sealed override IOperation Apply() { ItemArray relinkedSolutions = Relink(Parents, RelinkingAccuracy); var offspringScope = new Scope("Offspring"); foreach (var solution in relinkedSolutions) { var scope = new Scope(); scope.Variables.Add(new Variable(ParentsParameter.ActualName, solution)); offspringScope.SubScopes.Add(scope); } CurrentScope.SubScopes.Add(offspringScope); return base.Apply(); } protected abstract ItemArray Relink(ItemArray parents, PercentValue n); } }