[13484] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[16720] | 3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[13484] | 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 System.IO;
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| 24 | using System.Linq;
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| 25 |
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| 26 | namespace HeuristicLab.Problems.Instances.TSPLIB {
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| 27 | public abstract class TSPLIBPTSPInstanceProvider : TSPLIBInstanceProvider<PTSPData> {
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| 28 |
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| 29 | public override string Description {
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| 30 | get { return "Traveling Salesman Problem Library (adapted for generating PTSP instances)"; }
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| 31 | }
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| 32 |
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| 33 | protected override string FileExtension { get { return "tsp"; } }
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| 34 |
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| 35 | protected override PTSPData LoadInstance(TSPLIBParser parser, IDataDescriptor descriptor = null) {
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| 36 | parser.Parse();
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| 37 | if (parser.FixedEdges != null) throw new InvalidDataException("TSP instance " + parser.Name + " contains fixed edges which are not supported by HeuristicLab.");
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| 38 | var instance = new PTSPData();
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| 39 | instance.Dimension = parser.Dimension;
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| 40 | instance.Coordinates = parser.Vertices != null ? parser.Vertices : parser.DisplayVertices;
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| 41 | instance.Distances = parser.Distances;
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| 42 | switch (parser.EdgeWeightType) {
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| 43 | case TSPLIBEdgeWeightTypes.ATT:
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| 44 | instance.DistanceMeasure = DistanceMeasure.Att; break;
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| 45 | case TSPLIBEdgeWeightTypes.CEIL_2D:
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| 46 | instance.DistanceMeasure = DistanceMeasure.UpperEuclidean; break;
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| 47 | case TSPLIBEdgeWeightTypes.EUC_2D:
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| 48 | instance.DistanceMeasure = DistanceMeasure.RoundedEuclidean; break;
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| 49 | case TSPLIBEdgeWeightTypes.EUC_3D:
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| 50 | throw new InvalidDataException("3D coordinates are not supported.");
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| 51 | case TSPLIBEdgeWeightTypes.EXPLICIT:
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| 52 | instance.DistanceMeasure = DistanceMeasure.Direct; break;
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| 53 | case TSPLIBEdgeWeightTypes.GEO:
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| 54 | instance.DistanceMeasure = DistanceMeasure.Geo; break;
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| 55 | case TSPLIBEdgeWeightTypes.MAN_2D:
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| 56 | instance.DistanceMeasure = DistanceMeasure.Manhattan; break;
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| 57 | case TSPLIBEdgeWeightTypes.MAN_3D:
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| 58 | throw new InvalidDataException("3D coordinates are not supported.");
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| 59 | case TSPLIBEdgeWeightTypes.MAX_2D:
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| 60 | instance.DistanceMeasure = DistanceMeasure.Maximum; break;
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| 61 | case TSPLIBEdgeWeightTypes.MAX_3D:
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| 62 | throw new InvalidDataException("3D coordinates are not supported.");
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| 63 | default:
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| 64 | throw new InvalidDataException("The given edge weight is not supported by HeuristicLab.");
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| 65 | }
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| 66 |
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| 67 | instance.Name = parser.Name;
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| 68 | instance.Description = parser.Comment
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| 69 | + Environment.NewLine + Environment.NewLine
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| 70 | + GetInstanceDescription();
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| 71 |
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| 72 | instance.Probabilities = GetProbabilities(descriptor, instance);
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| 73 | return instance;
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| 74 | }
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| 75 |
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| 76 | protected abstract double[] GetProbabilities(IDataDescriptor descriptor, PTSPData instance);
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| 77 |
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| 78 | protected override void LoadSolution(TSPLIBParser parser, PTSPData instance) {
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| 79 | parser.Parse();
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| 80 | instance.BestKnownTour = parser.Tour.FirstOrDefault();
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| 81 | }
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| 82 |
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[14697] | 83 | protected override void LoadQuality(double? bestQuality, PTSPData instance) {
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| 84 | instance.BestKnownQuality = bestQuality;
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| 85 | }
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| 86 |
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[13484] | 87 | public PTSPData LoadData(string tspFile, string tourFile, double? bestQuality) {
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| 88 | var data = LoadInstance(new TSPLIBParser(tspFile));
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| 89 | if (!String.IsNullOrEmpty(tourFile)) {
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| 90 | var tourParser = new TSPLIBParser(tourFile);
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| 91 | LoadSolution(tourParser, data);
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| 92 | }
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| 93 | if (bestQuality.HasValue)
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| 94 | data.BestKnownQuality = bestQuality.Value;
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| 95 | return data;
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| 96 | }
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| 97 |
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| 98 | }
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| 99 | }
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