[2] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[12018] | 3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[2] | 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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[7995] | 22 | using System;
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[3138] | 23 | using System.Collections.Generic;
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[3096] | 24 | using System.Linq;
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[4722] | 25 | using HeuristicLab.Common;
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[2] | 26 | using HeuristicLab.Core;
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[3138] | 27 | using HeuristicLab.Data;
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| 28 | using HeuristicLab.Optimization;
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[2805] | 29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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[2] | 30 |
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| 31 | namespace HeuristicLab.Selection {
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[817] | 32 | /// <summary>
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[3096] | 33 | /// A selection operator which considers a single double quality value and selects the best.
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[817] | 34 | /// </summary>
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[3096] | 35 | [Item("BestSelector", "A selection operator which considers a single double quality value and selects the best.")]
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[3017] | 36 | [StorableClass]
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[3138] | 37 | public sealed class BestSelector : SingleObjectiveSelector, ISingleObjectiveSelector {
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[3096] | 38 | public BestSelector() : base() { }
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[4722] | 39 | [StorableConstructor]
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| 40 | private BestSelector(bool deserializing) : base(deserializing) { }
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| 41 | private BestSelector(BestSelector original, Cloner cloner)
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| 42 | : base(original, cloner) {
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| 43 | }
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| 44 | public override IDeepCloneable Clone(Cloner cloner) {
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| 45 | return new BestSelector(this, cloner);
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| 46 | }
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[2] | 47 |
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[4722] | 48 |
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[2830] | 49 | protected override IScope[] Select(List<IScope> scopes) {
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[2805] | 50 | int count = NumberOfSelectedSubScopesParameter.ActualValue.Value;
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| 51 | bool copy = CopySelectedParameter.Value.Value;
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[3096] | 52 | bool maximization = MaximizationParameter.ActualValue.Value;
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| 53 | ItemArray<DoubleValue> qualities = QualityParameter.ActualValue;
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[2830] | 54 | IScope[] selected = new IScope[count];
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[2805] | 55 |
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[3096] | 56 | // create a list for each scope that contains the scope's index in the original scope list
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[7995] | 57 | var temp = qualities.Where(x => IsValidQuality(x.Value)).Select((x, index) => new { index, x.Value });
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[3096] | 58 | if (maximization)
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| 59 | temp = temp.OrderByDescending(x => x.Value);
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| 60 | else
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| 61 | temp = temp.OrderBy(x => x.Value);
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| 62 | var list = temp.ToList();
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| 63 |
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[7995] | 64 | //check if list with indexes is as long as the original scope list
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| 65 | //otherwise invalid quality values were filtered
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| 66 | if (list.Count != scopes.Count) {
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| 67 | throw new ArgumentException("The scopes contain invalid quality values (either infinity or double.NaN) on which the selector cannot operate.");
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| 68 | }
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| 69 |
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[3128] | 70 | if (copy) {
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[3137] | 71 | int j = 0;
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| 72 | for (int i = 0; i < count; i++) {
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| 73 | selected[i] = (IScope)scopes[list[j].index].Clone();
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| 74 | j++;
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[3128] | 75 | if (j >= list.Count) j = 0;
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[2] | 76 | }
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[3128] | 77 | } else {
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[3137] | 78 | for (int i = 0; i < count; i++) {
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| 79 | selected[i] = scopes[list[0].index];
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| 80 | scopes[list[0].index] = null;
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| 81 | list.RemoveAt(0);
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[3128] | 82 | }
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[3137] | 83 | scopes.RemoveAll(x => x == null);
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[2] | 84 | }
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[2817] | 85 | return selected;
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[2] | 86 | }
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| 87 | }
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| 88 | }
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