#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 System; 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 { [Item("TabuMaker", "Base class for all operators that set a move tabu.")] [StorableClass] public abstract class TabuMaker : SingleSuccessorOperator, ITabuMaker, ISingleObjectiveOperator { public override bool CanChangeName { get { return false; } } public LookupParameter> TabuListParameter { get { return (LookupParameter>)Parameters["TabuList"]; } } public ValueLookupParameter TabuTenureParameter { get { return (ValueLookupParameter)Parameters["TabuTenure"]; } } public ILookupParameter MoveQualityParameter { get { return (ILookupParameter)Parameters["MoveQuality"]; } } public ILookupParameter QualityParameter { get { return (ILookupParameter)Parameters["Quality"]; } } public IValueLookupParameter MaximizationParameter { get { return (IValueLookupParameter)Parameters["Maximization"]; } } [StorableConstructor] protected TabuMaker(bool deserializing) : base(deserializing) { } protected TabuMaker(TabuMaker original, Cloner cloner) : base(original, cloner) { } protected TabuMaker() : base() { Parameters.Add(new LookupParameter>("TabuList", "The tabu list where move attributes are stored.")); Parameters.Add(new ValueLookupParameter("TabuTenure", "The tenure of the tabu list.")); Parameters.Add(new LookupParameter("MoveQuality", "The quality of the move.")); Parameters.Add(new LookupParameter("Quality", "The quality of the solution.")); Parameters.Add(new ValueLookupParameter("Maximization", "True if the problem is a maximization problem, else if it is a minimization problem.")); } public override IOperation Apply() { ItemList tabuList = TabuListParameter.ActualValue; int tabuTenure = TabuTenureParameter.ActualValue.Value; if (tabuTenure == 0) return base.Apply(); if (tabuTenure < 0) throw new InvalidOperationException("A TabuTenure of less than 0 is not allowed."); int overlength = tabuList.Count - tabuTenure; if (overlength >= 0) { for (int i = 0; i < tabuTenure - 1; i++) tabuList[i] = tabuList[i + overlength + 1]; while (tabuList.Count >= tabuTenure) tabuList.RemoveAt(tabuList.Count - 1); } tabuList.Add(GetTabuAttribute(MaximizationParameter.ActualValue.Value, QualityParameter.ActualValue.Value, MoveQualityParameter.ActualValue.Value)); return base.Apply(); } protected abstract IItem GetTabuAttribute(bool maximization, double quality, double moveQuality); } }