[7883] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[15584] | 3 | * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[7883] | 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 |
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| 25 | namespace HeuristicLab.Problems.Instances.VehicleRouting {
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| 26 | public class GoldenParser {
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| 27 | private string file;
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| 28 | private Stream stream;
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| 29 | private string problemName;
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[8053] | 30 |
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[7883] | 31 | #region Inner Enum TSPLIBEdgeWeightType
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| 32 | public enum GoldenEdgeWeightType {
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| 33 | UNDEFINED,
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| 34 | EUC_2D,
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| 35 | GEO
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| 36 | }
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| 37 | #endregion
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| 38 |
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| 39 | private const int EOF = 0;
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| 40 | private const int NAME = 1;
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| 41 | private const int TYPE = 2;
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| 42 | private const int COMMENT = 3;
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| 43 | private const int DIM = 4;
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| 44 | private const int WEIGHTTYPE = 5;
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| 45 | private const int WEIGHTFORMAT = 11;
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| 46 | private const int NODETYPE = 6;
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| 47 | private const int NODESECTION = 7;
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| 48 | private const int CAPACITY = 8;
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[7887] | 49 | private const int DISTANCE = 12;
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[7883] | 50 | private const int VEHICLES = 13;
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| 51 | private const int DEPOTSECTION = 9;
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| 52 | private const int DEMANDSECTION = 10;
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| 53 |
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| 54 | private string comment;
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| 55 | /// <summary>
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| 56 | /// Gets the comment of the parsed VRP.
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| 57 | /// </summary>
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| 58 | public string Comment {
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| 59 | get { return comment; }
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| 60 | }
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| 61 | private double[,] vertices;
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| 62 | /// <summary>
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| 63 | /// Gets the vertices of the parsed VRP.
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| 64 | /// </summary>
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| 65 | public double[,] Vertices {
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| 66 | get { return vertices; }
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| 67 | }
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| 68 | private GoldenEdgeWeightType weightType;
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| 69 | /// <summary>
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| 70 | /// Gets the weight format of the parsed VRP.
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| 71 | /// </summary>
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| 72 | public GoldenEdgeWeightType WeightType {
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| 73 | get { return weightType; }
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| 74 | }
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| 75 |
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| 76 | private double capacity;
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| 77 | public double Capacity {
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| 78 | get {
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| 79 | return capacity;
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| 80 | }
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| 81 | }
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| 82 |
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| 83 | private int vehicles;
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| 84 | public int Vehicles {
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| 85 | get {
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| 86 | return vehicles;
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| 87 | }
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| 88 | }
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| 89 |
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[7887] | 90 | private double distance;
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| 91 | public double Distance {
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| 92 | get {
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| 93 | return distance;
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| 94 | }
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| 95 | }
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| 96 |
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[7883] | 97 | private double[] demands;
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| 98 | public double[] Demands {
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| 99 | get {
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| 100 | return demands;
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | public String ProblemName {
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| 105 | get {
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| 106 | return problemName;
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | /// <summary>
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| 111 | /// Initializes a new instance of <see cref="TSPLIBParser"/> with the given <paramref name="path"/>.
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| 112 | /// </summary>
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| 113 | /// <exception cref="ArgumentException">Thrown if the input file is not a TSPLIB TSP file (*.vrp)
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| 114 | /// </exception>
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| 115 | /// <param name="path">The path where the VRP is stored.</param>
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| 116 | public GoldenParser() {
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| 117 | comment = string.Empty;
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| 118 | vertices = null;
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| 119 | weightType = GoldenEdgeWeightType.UNDEFINED;
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| 120 | capacity = -1;
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| 121 | vehicles = -1;
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[7887] | 122 | distance = -1;
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[7883] | 123 | demands = null;
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| 124 | }
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| 125 |
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[8053] | 126 | public GoldenParser(string file)
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| 127 | : this() {
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[7883] | 128 | this.file = file;
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| 129 | }
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| 130 |
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| 131 | public GoldenParser(Stream stream)
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[8053] | 132 | : this() {
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[7883] | 133 | this.stream = stream;
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| 134 | }
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| 135 |
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| 136 | /// <summary>
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| 137 | /// Reads the TSPLIB VRP file and parses the elements.
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| 138 | /// </summary>
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| 139 | /// <exception cref="InvalidDataException">Thrown if the file has an invalid format or contains invalid data.</exception>
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| 140 | public void Parse() {
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| 141 | StreamReader reader;
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| 142 | if (stream != null) {
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| 143 | reader = new StreamReader(stream);
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| 144 | } else {
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| 145 | reader = new StreamReader(file);
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| 146 | problemName = Path.GetFileNameWithoutExtension(file);
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| 147 | }
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| 148 |
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| 149 | using (reader) {
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| 150 | int section = -1;
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| 151 | string str = null;
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| 152 | bool weightFormatIsChecked = false;
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| 153 |
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| 154 | do {
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| 155 | str = reader.ReadLine();
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| 156 | section = GetSection(str);
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| 157 |
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| 158 | if (section != -1) {
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| 159 | switch (section) {
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| 160 | case NAME:
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| 161 | ReadName(str);
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| 162 | break;
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| 163 | case TYPE:
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| 164 | CheckType(str);
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| 165 | break;
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| 166 | case COMMENT:
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| 167 | ReadComment(str);
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| 168 | break;
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| 169 | case DIM:
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| 170 | InitArrays(str);
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| 171 | break;
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| 172 | case WEIGHTTYPE:
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| 173 | ReadWeightType(str);
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| 174 | break;
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| 175 | case WEIGHTFORMAT:
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| 176 | ReadWeightFormat(str);
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| 177 | weightFormatIsChecked = true;
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| 178 | break;
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| 179 | case NODETYPE:
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| 180 | CheckNodeType(str);
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| 181 | break;
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| 182 | case NODESECTION:
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| 183 | ReadVertices(reader);
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| 184 | break;
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| 185 | case CAPACITY:
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| 186 | ReadCapacity(str);
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| 187 | break;
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| 188 | case VEHICLES:
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| 189 | ReadVehicles(str);
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| 190 | break;
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[7887] | 191 | case DISTANCE:
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| 192 | ReadDistance(str);
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| 193 | break;
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[7883] | 194 | case DEPOTSECTION:
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| 195 | ReadDepot(reader);
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| 196 | break;
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| 197 | case DEMANDSECTION:
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| 198 | ReadDemands(reader);
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| 199 | break;
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| 200 | }
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| 201 | }
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| 202 | } while (!((section == EOF) || (str == null)));
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| 203 |
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| 204 | if (!weightFormatIsChecked || weightType == GoldenEdgeWeightType.UNDEFINED)
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| 205 | throw new InvalidDataException("Input file does not contain format or edge weight format information.");
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| 206 | }
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| 207 | }
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| 208 |
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| 209 | private int GetSection(string str) {
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| 210 | if (str == null)
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| 211 | return EOF;
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| 212 |
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| 213 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 214 | if (tokens.Length == 0)
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| 215 | return -1;
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| 216 |
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| 217 | string token = tokens[0].Trim();
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| 218 | if (token.Equals("eof", StringComparison.OrdinalIgnoreCase))
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| 219 | return EOF;
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| 220 | if (token.Equals("name", StringComparison.OrdinalIgnoreCase))
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| 221 | return NAME;
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| 222 | if (token.Equals("type", StringComparison.OrdinalIgnoreCase))
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| 223 | return TYPE;
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| 224 | if (token.Equals("comment", StringComparison.OrdinalIgnoreCase))
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| 225 | return COMMENT;
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| 226 | if (token.Equals("dimension", StringComparison.OrdinalIgnoreCase))
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| 227 | return DIM;
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| 228 | if (token.Equals("edge_weight_type", StringComparison.OrdinalIgnoreCase))
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| 229 | return WEIGHTTYPE;
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| 230 | if (token.Equals("edge_weight_format", StringComparison.OrdinalIgnoreCase))
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| 231 | return WEIGHTFORMAT;
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| 232 | if (token.Equals("node_coord_type", StringComparison.OrdinalIgnoreCase))
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| 233 | return NODETYPE;
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| 234 | if (token.Equals("node_coord_section", StringComparison.OrdinalIgnoreCase))
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| 235 | return NODESECTION;
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| 236 | if (token.Equals("capacity", StringComparison.OrdinalIgnoreCase))
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| 237 | return CAPACITY;
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| 238 | if (token.Equals("vehicles", StringComparison.OrdinalIgnoreCase))
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| 239 | return VEHICLES;
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[7887] | 240 | if (token.Equals("distance", StringComparison.OrdinalIgnoreCase))
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| 241 | return DISTANCE;
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[7883] | 242 | if (token.Equals("depot_section", StringComparison.OrdinalIgnoreCase))
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| 243 | return DEPOTSECTION;
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| 244 | if (token.Equals("demand_section", StringComparison.OrdinalIgnoreCase))
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| 245 | return DEMANDSECTION;
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| 246 |
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| 247 | return -1;
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| 248 | }
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| 249 |
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| 250 | private void ReadName(string str) {
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| 251 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 252 | problemName = tokens[tokens.Length - 1].Trim();
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| 253 | }
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| 254 |
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| 255 | private void CheckType(string str) {
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| 256 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 257 |
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| 258 | string type = tokens[tokens.Length - 1].Trim();
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| 259 | if (!type.Equals("cvrp", StringComparison.OrdinalIgnoreCase))
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| 260 | throw new InvalidDataException("Input file format is not \"CVRP\"");
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| 261 | }
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| 262 |
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| 263 | private void ReadComment(string str) {
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| 264 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 265 | comment = tokens[tokens.Length - 1].Trim();
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| 266 | }
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| 267 |
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| 268 | private void InitArrays(string str) {
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| 269 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 270 | string dimension = tokens[tokens.Length - 1].Trim();
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| 271 |
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| 272 | int dim = Int32.Parse(dimension);
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| 273 | vertices = new double[dim, 2];
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| 274 | demands = new double[dim];
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| 275 | }
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| 276 |
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| 277 | private void ReadWeightType(string str) {
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| 278 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 279 | string type = tokens[tokens.Length - 1].Trim();
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| 280 |
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| 281 | if (type.Equals("euc_2d", StringComparison.OrdinalIgnoreCase))
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| 282 | weightType = GoldenEdgeWeightType.EUC_2D;
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| 283 | else if (type.Equals("geo", StringComparison.OrdinalIgnoreCase))
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| 284 | weightType = GoldenEdgeWeightType.GEO;
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| 285 | else if (type.Equals("function", StringComparison.OrdinalIgnoreCase)) {
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| 286 | weightType = GoldenEdgeWeightType.UNDEFINED;
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| 287 | } else
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| 288 | throw new InvalidDataException("Input file contains an unsupported edge weight format (only \"EUC_2D\" and \"GEO\" are supported).");
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| 289 | }
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| 290 |
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| 291 | private void ReadWeightFormat(string str) {
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| 292 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 293 | string format = tokens[tokens.Length - 1].Trim();
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| 294 |
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| 295 | if (format.Equals("euc_2d", StringComparison.OrdinalIgnoreCase))
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| 296 | weightType = GoldenEdgeWeightType.EUC_2D;
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| 297 | else if (format.Equals("geo", StringComparison.OrdinalIgnoreCase))
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| 298 | weightType = GoldenEdgeWeightType.GEO;
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| 299 | else
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| 300 | throw new InvalidDataException("Input file contains an unsupported edge weight format.");
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| 301 | }
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| 302 |
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| 303 | private void CheckNodeType(string str) {
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| 304 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 305 | string type = tokens[tokens.Length - 1].Trim();
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| 306 |
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| 307 | if (!type.Equals("twod_coords", StringComparison.OrdinalIgnoreCase))
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| 308 | throw new InvalidDataException("Input file contains an unsupported node coordinates format (only \"TWOD_COORDS\" is supported).");
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| 309 | }
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| 310 |
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| 311 | private void ReadVertices(StreamReader reader) {
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| 312 | if (vertices == null)
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| 313 | throw new InvalidDataException("Input file does not contain dimension information.");
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| 314 |
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| 315 | for (int i = 1; i < (vertices.Length / 2); i++) {
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| 316 | string str = reader.ReadLine();
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| 317 | string[] tokens = str.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
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| 318 |
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| 319 | if (tokens.Length != 3)
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| 320 | throw new InvalidDataException("Input file contains invalid node coordinates.");
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| 321 |
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| 322 | vertices[i, 0] = double.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
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| 323 | vertices[i, 1] = double.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
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| 324 | }
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| 325 | }
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| 326 |
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| 327 | private void ReadCapacity(string str) {
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| 328 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 329 | capacity = double.Parse(tokens[tokens.Length - 1].Trim(), System.Globalization.CultureInfo.InvariantCulture);
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| 330 | }
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| 331 |
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| 332 | private void ReadVehicles(string str) {
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| 333 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 334 | vehicles = int.Parse(tokens[tokens.Length - 1].Trim());
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| 335 | }
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| 336 |
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[7887] | 337 | private void ReadDistance(string str) {
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| 338 | string[] tokens = str.Split(new string[] { ":" }, StringSplitOptions.None);
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| 339 | distance = double.Parse(tokens[tokens.Length - 1].Trim(), System.Globalization.CultureInfo.InvariantCulture);
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| 340 | }
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| 341 |
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[7883] | 342 | private void ReadDepot(StreamReader reader) {
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| 343 | string[] tokens;
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| 344 | do {
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| 345 | string str = reader.ReadLine();
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| 346 | tokens = str.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
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| 347 |
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| 348 | if (tokens.Length == 2) {
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| 349 | vertices[0, 0] = double.Parse(tokens[0], System.Globalization.CultureInfo.InvariantCulture);
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| 350 | vertices[0, 1] = double.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
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| 351 | }
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| 352 | } while (tokens.Length == 2);
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| 353 | }
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| 354 |
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| 355 | private void ReadDemands(StreamReader reader) {
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| 356 | if (demands == null)
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| 357 | throw new InvalidDataException("Input file does not contain dimension information.");
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| 358 |
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| 359 | for (int i = 0; i < demands.Length; i++) {
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| 360 | if (i != 0) {
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| 361 | string str = reader.ReadLine();
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| 362 | string[] tokens = str.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
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| 363 |
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| 364 | if (tokens.Length != 2)
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| 365 | throw new InvalidDataException("Input file contains invalid demands.");
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| 366 |
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| 367 | int index = int.Parse(tokens[0]);
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[15066] | 368 | double value = double.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
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[7883] | 369 |
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| 370 | demands[index] = value;
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| 371 | } else {
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| 372 | demands[0] = 0;
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| 373 | }
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| 374 | }
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| 375 | }
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| 376 | }
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| 377 | }
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