| 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 System;
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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 | [Item("PreventFallBackToSkippedPositions", "Prevents falling back into ranges that have been moved over before.")]
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| 32 | [StorableClass]
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| 33 | public class PreventFallBackToSkippedPositions : SingleSuccessorOperator, IAdditiveRealVectorMoveOperator, ITabuMoveEvaluator {
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| 34 | public ILookupParameter<AdditiveMove> AdditiveMoveParameter {
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| 35 | get { return (LookupParameter<AdditiveMove>)Parameters["AdditiveMove"]; }
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| 36 | }
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| 37 | public ILookupParameter<RealVector> RealVectorParameter {
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| 38 | get { return (LookupParameter<RealVector>)Parameters["RealVector"]; }
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| 39 | }
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| 40 | public ILookupParameter<ItemList<IItem>> TabuListParameter {
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| 41 | get { return (ILookupParameter<ItemList<IItem>>)Parameters["TabuList"]; }
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| 42 | }
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| 43 | public ILookupParameter<BoolValue> MoveTabuParameter {
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| 44 | get { return (ILookupParameter<BoolValue>)Parameters["MoveTabu"]; }
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| 45 | }
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| 46 | private ScopeParameter CurrentScopeParameter {
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| 47 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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| 48 | }
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| 49 |
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| 50 | public PreventFallBackToSkippedPositions()
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| 51 | : base() {
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| 52 | Parameters.Add(new LookupParameter<AdditiveMove>("AdditiveMove", "The move to evaluate."));
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| 53 | Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The variable to store if a move was tabu."));
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| 54 | Parameters.Add(new LookupParameter<RealVector>("RealVector", "The solution as real vector."));
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| 55 | Parameters.Add(new LookupParameter<ItemList<IItem>>("TabuList", "The tabu list."));
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| 56 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope."));
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| 57 | }
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| 58 |
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| 59 | public override IOperation Apply() {
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| 60 | ItemList<IItem> tabuList = TabuListParameter.ActualValue;
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| 61 | AdditiveMove move = AdditiveMoveParameter.ActualValue;
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| 62 | RealVector vector = RealVectorParameter.ActualValue;
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| 63 | bool isTabu = false;
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| 64 | foreach (IItem tabuMove in tabuList) {
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| 65 | AdditiveMoveTabuAttribute attribute = (tabuMove as AdditiveMoveTabuAttribute);
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| 66 | if (attribute != null && attribute.Dimension == move.Dimension) {
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| 67 | double newPos = vector[move.Dimension] + move.MoveDistance;
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| 68 | if (Math.Min(attribute.MovedPosition, attribute.OriginalPosition) < newPos
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| 69 | && newPos < Math.Max(attribute.MovedPosition, attribute.OriginalPosition)) {
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| 70 | isTabu = true;
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| 71 | break;
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| 72 | }
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| 73 | }
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| 74 | }
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| 75 | MoveTabuParameter.ActualValue = new BoolValue(isTabu);
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| 76 | return base.Apply();
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| 77 | }
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| 78 |
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| 79 | public override bool CanChangeName {
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| 80 | get { return false; }
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| 81 | }
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| 82 | }
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| 83 | }
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