[14162] | 1 | #region License Information
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| 2 |
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| 3 | /* HeuristicLab
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[15584] | 4 | * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[14162] | 5 | *
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| 6 | * This file is part of HeuristicLab.
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| 7 | *
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| 8 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 9 | * it under the terms of the GNU General Public License as published by
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| 10 | * the Free Software Foundation, either version 3 of the License, or
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| 11 | * (at your option) any later version.
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| 12 | *
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| 13 | * HeuristicLab is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public License
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| 19 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #endregion
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| 23 |
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| 24 | using System.Linq;
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[15217] | 25 | using HeuristicLab.Analysis;
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[14162] | 26 | using HeuristicLab.Common;
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| 27 | using HeuristicLab.Core;
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| 28 | using HeuristicLab.Encodings.PermutationEncoding;
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| 29 | using HeuristicLab.Optimization;
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[15217] | 30 | using HeuristicLab.Optimization.Operators;
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[14162] | 31 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 32 |
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| 33 | namespace HeuristicLab.Problems.BinPacking2D {
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| 34 | [Item("Bin Packing Problem (2D, permutation encoding) (BPP)", "Represents a two-dimensional bin-packing problem using only bins with identical measures and bins/items with rectangular shapes.")]
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| 35 | [StorableClass]
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| 36 | [Creatable(Category = CreatableAttribute.Categories.CombinatorialProblems, Priority = 300)]
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| 37 | public sealed class PermutationProblem : ProblemBase<PermutationEncoding, Permutation> {
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| 38 | // persistence
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| 39 | [StorableConstructor]
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| 40 | private PermutationProblem(bool deserializing) : base(deserializing) { }
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| 41 |
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| 42 | // cloning
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| 43 | private PermutationProblem(PermutationProblem original, Cloner cloner)
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| 44 | : base(original, cloner) {
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| 45 | RegisterEventHandlers();
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| 46 | }
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| 47 |
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| 48 | public PermutationProblem()
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| 49 | : base() {
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| 50 | Decoder = new ExtremePointPermutationDecoder(); // default decoder
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| 51 |
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| 52 | Encoding = new PermutationEncoding(EncodedSolutionName, Items.Count, PermutationTypes.Absolute);
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| 53 | AddOperators();
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[15217] | 54 | Parameterize();
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[14162] | 55 | RegisterEventHandlers();
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| 56 | }
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| 57 | public override IDeepCloneable Clone(Cloner cloner) {
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| 58 | return new PermutationProblem(this, cloner);
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| 59 | }
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| 60 |
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| 61 | [StorableHook(HookType.AfterDeserialization)]
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| 62 | private void AfterDeserialization() {
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| 63 | RegisterEventHandlers();
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| 64 | }
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| 65 |
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[15217] | 66 | protected override void OnEncodingChanged() {
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| 67 | base.OnEncodingChanged();
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| 68 | Parameterize();
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| 69 | }
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[14162] | 70 |
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| 71 | private void AddOperators() {
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| 72 | Operators.Add(new TranslocationMoveEvaluator());
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| 73 | Operators.Add(new Swap2MoveEvaluator());
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| 74 |
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| 75 | Operators.RemoveAll(x => x is SingleObjectiveMoveGenerator);
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| 76 | Operators.RemoveAll(x => x is SingleObjectiveMoveMaker);
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| 77 | Operators.RemoveAll(x => x is SingleObjectiveMoveEvaluator);
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[15217] | 78 | Operators.Add(new HammingSimilarityCalculator());
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| 79 | Operators.Add(new QualitySimilarityCalculator());
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| 80 | Operators.Add(new PopulationSimilarityAnalyzer(Operators.OfType<ISolutionSimilarityCalculator>()));
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[14162] | 81 |
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| 82 | Encoding.ConfigureOperators(Operators.OfType<IOperator>());
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| 83 |
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| 84 | foreach (var op in Operators.OfType<IOperator<Permutation>>()) {
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| 85 | op.BinShapeParameter.ActualName = BinShapeParameter.Name;
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| 86 | op.ItemsParameter.ActualName = ItemsParameter.Name;
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| 87 | op.SolutionEvaluatorParameter.ActualName = SolutionEvaluatorParameter.Name;
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| 88 | op.DecoderParameter.ActualName = DecoderParameter.Name;
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | private void RegisterEventHandlers() {
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| 93 | // update encoding length when number of items is changed
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[15217] | 94 | ItemsParameter.ValueChanged += (sender, args) => Parameterize();
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[14162] | 95 | }
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[15217] | 96 |
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| 97 | private void Parameterize() {
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| 98 | Encoding.Length = Items.Count;
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| 99 | foreach (var similarityCalculator in Operators.OfType<ISolutionSimilarityCalculator>()) {
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| 100 | similarityCalculator.SolutionVariableName = Encoding.SolutionCreator.PermutationParameter.ActualName;
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| 101 | similarityCalculator.QualityVariableName = Evaluator.QualityParameter.ActualName;
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| 102 | }
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| 103 | }
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[14162] | 104 | }
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| 105 | }
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