[4360] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[12009] | 3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[4360] | 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.Collections.Generic;
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| 24 | using System.Drawing;
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| 25 | using System.Linq;
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[8720] | 26 | using HeuristicLab.Analysis;
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[4360] | 27 | using HeuristicLab.Common;
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| 28 | using HeuristicLab.Core;
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| 29 | using HeuristicLab.Data;
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| 30 | using HeuristicLab.Optimization;
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[12280] | 31 | using HeuristicLab.Optimization.Operators;
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[4360] | 32 | using HeuristicLab.Parameters;
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| 33 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 34 | using HeuristicLab.PluginInfrastructure;
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[7934] | 35 | using HeuristicLab.Problems.Instances;
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[11905] | 36 | using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
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[4362] | 37 | using HeuristicLab.Problems.VehicleRouting.Interfaces;
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[7934] | 38 | using HeuristicLab.Problems.VehicleRouting.Interpreters;
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[4362] | 39 | using HeuristicLab.Problems.VehicleRouting.ProblemInstances;
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[4365] | 40 | using HeuristicLab.Problems.VehicleRouting.Variants;
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[4360] | 41 |
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| 42 | namespace HeuristicLab.Problems.VehicleRouting {
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| 43 | [Item("Vehicle Routing Problem", "Represents a Vehicle Routing Problem.")]
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| 44 | [Creatable("Problems")]
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| 45 | [StorableClass]
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[11333] | 46 | public sealed class VehicleRoutingProblem : Problem, ISingleObjectiveHeuristicOptimizationProblem, IStorableContent, IProblemInstanceConsumer<IVRPData> {
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[4444] | 47 | public string Filename { get; set; }
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[7203] | 48 |
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| 49 | public static new Image StaticItemImage {
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[5867] | 50 | get { return HeuristicLab.Common.Resources.VSImageLibrary.Type; }
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[4360] | 51 | }
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| 52 |
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[4362] | 53 | #region Parameter Properties
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| 54 | public ValueParameter<BoolValue> MaximizationParameter {
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| 55 | get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
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[4360] | 56 | }
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[5867] | 57 | IParameter ISingleObjectiveHeuristicOptimizationProblem.MaximizationParameter {
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[4362] | 58 | get { return MaximizationParameter; }
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[4360] | 59 | }
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[4362] | 60 | public ValueParameter<IVRPProblemInstance> ProblemInstanceParameter {
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| 61 | get { return (ValueParameter<IVRPProblemInstance>)Parameters["ProblemInstance"]; }
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| 62 | }
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| 63 | public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
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| 64 | get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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| 65 | }
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[5867] | 66 | IParameter ISingleObjectiveHeuristicOptimizationProblem.BestKnownQualityParameter {
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[4362] | 67 | get { return BestKnownQualityParameter; }
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| 68 | }
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[4860] | 69 | public OptionalValueParameter<VRPSolution> BestKnownSolutionParameter {
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| 70 | get { return (OptionalValueParameter<VRPSolution>)Parameters["BestKnownSolution"]; }
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| 71 | }
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[8121] | 72 | public IConstrainedValueParameter<IVRPCreator> SolutionCreatorParameter {
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| 73 | get { return (IConstrainedValueParameter<IVRPCreator>)Parameters["SolutionCreator"]; }
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[4360] | 74 | }
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[5867] | 75 | IParameter IHeuristicOptimizationProblem.SolutionCreatorParameter {
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[4365] | 76 | get { return SolutionCreatorParameter; }
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[4362] | 77 | }
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[4365] | 78 | public IValueParameter<IVRPEvaluator> EvaluatorParameter {
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| 79 | get { return (IValueParameter<IVRPEvaluator>)Parameters["Evaluator"]; }
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| 80 | }
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[5867] | 81 | IParameter IHeuristicOptimizationProblem.EvaluatorParameter {
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[4365] | 82 | get { return EvaluatorParameter; }
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| 83 | }
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[4362] | 84 | #endregion
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[4360] | 85 |
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[4362] | 86 | #region Properties
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| 87 | public IVRPProblemInstance ProblemInstance {
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| 88 | get { return ProblemInstanceParameter.Value; }
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| 89 | set { ProblemInstanceParameter.Value = value; }
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[4360] | 90 | }
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| 91 |
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[4860] | 92 | public VRPSolution BestKnownSolution {
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| 93 | get { return BestKnownSolutionParameter.Value; }
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| 94 | set { BestKnownSolutionParameter.Value = value; }
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| 95 | }
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| 96 |
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[7852] | 97 | public DoubleValue BestKnownQuality {
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| 98 | get { return BestKnownQualityParameter.Value; }
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| 99 | set { BestKnownQualityParameter.Value = value; }
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| 100 | }
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| 101 |
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[4362] | 102 | public ISingleObjectiveEvaluator Evaluator {
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[7852] | 103 | get { return EvaluatorParameter.Value; }
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[4360] | 104 | }
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| 105 |
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[5867] | 106 | IEvaluator IHeuristicOptimizationProblem.Evaluator {
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[4362] | 107 | get { return this.Evaluator; }
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[4360] | 108 | }
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| 109 |
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[8121] | 110 | ISolutionCreator IHeuristicOptimizationProblem.SolutionCreator {
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[7852] | 111 | get { return SolutionCreatorParameter.Value; }
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[4360] | 112 | }
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[8121] | 113 | public IVRPCreator SolutionCreator {
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| 114 | get { return SolutionCreatorParameter.Value; }
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| 115 | set { SolutionCreatorParameter.Value = value; }
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| 116 | }
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[4360] | 117 | #endregion
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| 118 |
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| 119 | [StorableConstructor]
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| 120 | private VehicleRoutingProblem(bool deserializing) : base(deserializing) { }
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| 121 | public VehicleRoutingProblem()
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| 122 | : base() {
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| 123 | Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Vehicle Routing Problem is a minimization problem.", new BoolValue(false)));
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[4362] | 124 | Parameters.Add(new ValueParameter<IVRPProblemInstance>("ProblemInstance", "The VRP problem instance"));
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| 125 | Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this VRP instance."));
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[4860] | 126 | Parameters.Add(new OptionalValueParameter<VRPSolution>("BestKnownSolution", "The best known solution of this VRP instance."));
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[4365] | 127 |
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[7852] | 128 | Parameters.Add(new ConstrainedValueParameter<IVRPCreator>("SolutionCreator", "The operator which should be used to create new VRP solutions."));
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| 129 | Parameters.Add(new ValueParameter<IVRPEvaluator>("Evaluator", "The operator which should be used to evaluate VRP solutions."));
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| 130 |
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| 131 | EvaluatorParameter.Hidden = true;
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| 132 |
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[4360] | 133 | InitializeRandomVRPInstance();
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[4365] | 134 | InitializeOperators();
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[4360] | 135 |
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| 136 | AttachEventHandlers();
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[4362] | 137 | AttachProblemInstanceEventHandlers();
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[10648] | 138 |
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| 139 | EvaluatorParameter.Value = ProblemInstance.SolutionEvaluator;
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[4360] | 140 | }
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| 141 |
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| 142 | public override IDeepCloneable Clone(Cloner cloner) {
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[7906] | 143 | cloner.Clone(ProblemInstance);
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[4752] | 144 | return new VehicleRoutingProblem(this, cloner);
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[4360] | 145 | }
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| 146 |
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[4752] | 147 | private VehicleRoutingProblem(VehicleRoutingProblem original, Cloner cloner)
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| 148 | : base(original, cloner) {
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| 149 | this.AttachEventHandlers();
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[10361] | 150 | this.AttachProblemInstanceEventHandlers();
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[10648] | 151 |
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| 152 | ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
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[4752] | 153 | }
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| 154 |
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[4360] | 155 | #region Events
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| 156 | public event EventHandler SolutionCreatorChanged;
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| 157 | private void OnSolutionCreatorChanged() {
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| 158 | EventHandler handler = SolutionCreatorChanged;
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| 159 | if (handler != null) handler(this, EventArgs.Empty);
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| 160 | }
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| 161 | public event EventHandler EvaluatorChanged;
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| 162 | private void OnEvaluatorChanged() {
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| 163 | EventHandler handler = EvaluatorChanged;
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| 164 | if (handler != null) handler(this, EventArgs.Empty);
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| 165 | }
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| 166 | #endregion
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| 167 |
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| 168 | #region Helpers
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| 169 | [StorableHook(HookType.AfterDeserialization)]
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[7934] | 170 | private void AfterDeserialization() {
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[4360] | 171 | AttachEventHandlers();
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[4362] | 172 | AttachProblemInstanceEventHandlers();
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[10648] | 173 |
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| 174 | ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
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[4360] | 175 | }
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| 176 |
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[8006] | 177 | [Storable(Name = "operators", AllowOneWay = true)]
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| 178 | private List<IOperator> StorableOperators {
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| 179 | set { Operators.AddRange(value); }
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| 180 | }
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| 181 |
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[4360] | 182 | private void AttachEventHandlers() {
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[4362] | 183 | ProblemInstanceParameter.ValueChanged += new EventHandler(ProblemInstanceParameter_ValueChanged);
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[7861] | 184 | BestKnownSolutionParameter.ValueChanged += new EventHandler(BestKnownSolutionParameter_ValueChanged);
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[8006] | 185 | EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
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| 186 | SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
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[4360] | 187 | }
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[4362] | 188 |
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| 189 | private void AttachProblemInstanceEventHandlers() {
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| 190 | if (ProblemInstance != null) {
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[7852] | 191 | ProblemInstance.EvaluationChanged += new EventHandler(ProblemInstance_EvaluationChanged);
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[7934] | 192 | }
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[7852] | 193 | }
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[4860] | 194 |
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[7861] | 195 | private void EvalBestKnownSolution() {
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[7852] | 196 | if (BestKnownSolution != null) {
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| 197 | //call evaluator
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| 198 | BestKnownQuality = new DoubleValue(ProblemInstance.Evaluate(BestKnownSolution.Solution).Quality);
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| 199 | BestKnownSolution.Quality = BestKnownQuality;
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| 200 | } else {
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| 201 | BestKnownQuality = null;
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[4362] | 202 | }
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[4360] | 203 | }
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[4362] | 204 |
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[7861] | 205 | void BestKnownSolutionParameter_ValueChanged(object sender, EventArgs e) {
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| 206 | EvalBestKnownSolution();
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| 207 | }
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| 208 |
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| 209 | void ProblemInstance_EvaluationChanged(object sender, EventArgs e) {
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| 210 | EvalBestKnownSolution();
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| 211 | }
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| 212 |
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[4362] | 213 | void ProblemInstanceParameter_ValueChanged(object sender, EventArgs e) {
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[7853] | 214 | InitializeOperators();
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[4362] | 215 | AttachProblemInstanceEventHandlers();
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[4365] | 216 |
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[10648] | 217 | EvaluatorParameter.Value = ProblemInstance.SolutionEvaluator;
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| 218 |
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[4365] | 219 | OnSolutionCreatorChanged();
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| 220 | OnEvaluatorChanged();
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| 221 | OnOperatorsChanged();
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[4360] | 222 | }
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[6907] | 223 |
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| 224 | public void SetProblemInstance(IVRPProblemInstance instance) {
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| 225 | ProblemInstanceParameter.ValueChanged -= new EventHandler(ProblemInstanceParameter_ValueChanged);
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| 226 |
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| 227 | ProblemInstance = instance;
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| 228 | AttachProblemInstanceEventHandlers();
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| 229 |
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| 230 | OnSolutionCreatorChanged();
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| 231 | OnEvaluatorChanged();
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| 232 |
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| 233 | ProblemInstanceParameter.ValueChanged += new EventHandler(ProblemInstanceParameter_ValueChanged);
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| 234 | }
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| 235 |
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[4362] | 236 | private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
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| 237 | OnSolutionCreatorChanged();
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[4360] | 238 | }
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[4362] | 239 | private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
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[8006] | 240 | if (ProblemInstance != null)
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| 241 | ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
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[4362] | 242 | OnEvaluatorChanged();
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[4360] | 243 | }
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[4365] | 244 |
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| 245 | private void InitializeOperators() {
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[8346] | 246 | var solutionCreatorParameter = SolutionCreatorParameter as ConstrainedValueParameter<IVRPCreator>;
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| 247 | solutionCreatorParameter.ValidValues.Clear();
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| 248 |
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[8006] | 249 | Operators.Clear();
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[4365] | 250 |
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| 251 | if (ProblemInstance != null) {
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[8006] | 252 | Operators.AddRange(
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[4365] | 253 | ProblemInstance.Operators.Concat(
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| 254 | ApplicationManager.Manager.GetInstances<IGeneralVRPOperator>().Cast<IOperator>()).OrderBy(op => op.Name));
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[8346] | 255 | Operators.Add(new VRPSimilarityCalculator());
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[12280] | 256 | Operators.Add(new QualitySimilarityCalculator());
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| 257 | Operators.Add(new NoSimilarityCalculator());
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| 258 | Operators.Add(new PopulationSimilarityAnalyzer(Operators.OfType<ISolutionSimilarityCalculator>()));
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[8346] | 259 |
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| 260 | IVRPCreator defaultCreator = null;
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| 261 | foreach (IVRPCreator creator in Operators.Where(o => o is IVRPCreator)) {
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| 262 | solutionCreatorParameter.ValidValues.Add(creator);
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| 263 | if (creator is Encodings.Alba.RandomCreator)
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| 264 | defaultCreator = creator;
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| 265 | }
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[11905] | 266 | Operators.Add(new AlbaLambdaInterchangeLocalImprovementOperator());
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[8346] | 267 | if (defaultCreator != null)
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| 268 | solutionCreatorParameter.Value = defaultCreator;
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[4365] | 269 | }
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| 270 |
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| 271 | ParameterizeOperators();
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| 272 | }
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| 273 |
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| 274 | private void ParameterizeOperators() {
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[7999] | 275 | foreach (IOperator op in Operators.OfType<IOperator>()) {
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[4365] | 276 | if (op is IMultiVRPOperator) {
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[7999] | 277 | (op as IMultiVRPOperator).SetOperators(Operators.OfType<IOperator>());
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[4365] | 278 | }
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| 279 | }
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[8346] | 280 | if (ProblemInstance != null) {
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| 281 | foreach (ISingleObjectiveImprovementOperator op in Operators.OfType<ISingleObjectiveImprovementOperator>()) {
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| 282 | op.SolutionParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
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| 283 | op.SolutionParameter.Hidden = true;
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| 284 | }
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| 285 | foreach (ISingleObjectivePathRelinker op in Operators.OfType<ISingleObjectivePathRelinker>()) {
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| 286 | op.ParentsParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
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| 287 | op.ParentsParameter.Hidden = true;
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| 288 | }
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[12280] | 289 | foreach (ISolutionSimilarityCalculator op in Operators.OfType<ISolutionSimilarityCalculator>()) {
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[8346] | 290 | op.SolutionVariableName = SolutionCreator.VRPToursParameter.ActualName;
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| 291 | op.QualityVariableName = ProblemInstance.SolutionEvaluator.QualityParameter.ActualName;
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[12280] | 292 | var calc = op as VRPSimilarityCalculator;
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| 293 | if (calc != null) calc.ProblemInstance = ProblemInstance;
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[8346] | 294 | }
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| 295 | }
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[4365] | 296 | }
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[8346] | 297 |
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[4360] | 298 | #endregion
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| 299 |
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| 300 | private void InitializeRandomVRPInstance() {
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| 301 | System.Random rand = new System.Random();
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| 302 |
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[4362] | 303 | CVRPTWProblemInstance problem = new CVRPTWProblemInstance();
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[4360] | 304 | int cities = 100;
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[4362] | 305 |
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| 306 | problem.Coordinates = new DoubleMatrix(cities + 1, 2);
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| 307 | problem.Demand = new DoubleArray(cities + 1);
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| 308 | problem.DueTime = new DoubleArray(cities + 1);
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| 309 | problem.ReadyTime = new DoubleArray(cities + 1);
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| 310 | problem.ServiceTime = new DoubleArray(cities + 1);
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| 311 |
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| 312 | problem.Vehicles.Value = 100;
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| 313 | problem.Capacity.Value = 200;
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| 314 |
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| 315 | for (int i = 0; i <= cities; i++) {
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| 316 | problem.Coordinates[i, 0] = rand.Next(0, 100);
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| 317 | problem.Coordinates[i, 1] = rand.Next(0, 100);
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| 318 |
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| 319 | if (i == 0) {
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| 320 | problem.Demand[i] = 0;
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| 321 | problem.DueTime[i] = Int16.MaxValue;
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| 322 | problem.ReadyTime[i] = 0;
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| 323 | problem.ServiceTime[i] = 0;
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| 324 | } else {
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| 325 | problem.Demand[i] = rand.Next(10, 50);
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[6851] | 326 | problem.DueTime[i] = rand.Next((int)Math.Ceiling(problem.GetDistance(0, i, null)), 1200);
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[4362] | 327 | problem.ReadyTime[i] = problem.DueTime[i] - rand.Next(0, 100);
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| 328 | problem.ServiceTime[i] = 90;
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| 329 | }
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| 330 | }
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| 331 |
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| 332 | this.ProblemInstance = problem;
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[4360] | 333 | }
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[4860] | 334 |
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| 335 | public void ImportSolution(string solutionFileName) {
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| 336 | SolutionParser parser = new SolutionParser(solutionFileName);
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| 337 | parser.Parse();
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| 338 |
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| 339 | HeuristicLab.Problems.VehicleRouting.Encodings.Potvin.PotvinEncoding encoding = new Encodings.Potvin.PotvinEncoding(ProblemInstance);
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| 340 |
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| 341 | int cities = 0;
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| 342 | foreach (List<int> route in parser.Routes) {
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| 343 | Tour tour = new Tour();
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| 344 | tour.Stops.AddRange(route);
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| 345 | cities += tour.Stops.Count;
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| 346 |
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| 347 | encoding.Tours.Add(tour);
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| 348 | }
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| 349 |
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| 350 | if (cities != ProblemInstance.Coordinates.Rows - 1)
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| 351 | ErrorHandling.ShowErrorDialog(new Exception("The optimal solution does not seem to correspond with the problem data"));
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| 352 | else {
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| 353 | VRPSolution solution = new VRPSolution(ProblemInstance, encoding, new DoubleValue(0));
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[7852] | 354 | BestKnownSolutionParameter.Value = solution;
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[4860] | 355 | }
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| 356 | }
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[7871] | 357 |
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[8905] | 358 | #region Instance Consuming
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| 359 | public void Load(IVRPData data, IVRPDataInterpreter interpreter) {
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| 360 | VRPInstanceDescription instance = interpreter.Interpret(data);
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[7871] | 361 |
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[8905] | 362 | Name = instance.Name;
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| 363 | Description = instance.Description;
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[10929] | 364 |
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| 365 | BestKnownQuality = null;
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| 366 | BestKnownSolution = null;
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| 367 |
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[8905] | 368 | if (ProblemInstance != null && instance.ProblemInstance != null &&
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| 369 | instance.ProblemInstance.GetType() == ProblemInstance.GetType())
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| 370 | SetProblemInstance(instance.ProblemInstance);
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| 371 | else
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| 372 | ProblemInstance = instance.ProblemInstance;
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[7871] | 373 |
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[8905] | 374 | OnReset();
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[7871] | 375 |
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[8905] | 376 | if (instance.BestKnownQuality != null) {
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| 377 | BestKnownQuality = new DoubleValue((double)instance.BestKnownQuality);
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| 378 | }
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[7871] | 379 |
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[8905] | 380 | if (instance.BestKnownSolution != null) {
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| 381 | VRPSolution solution = new VRPSolution(ProblemInstance, instance.BestKnownSolution, new DoubleValue(0));
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| 382 | BestKnownSolution = solution;
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[7934] | 383 | }
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[7871] | 384 | }
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[10744] | 385 | #endregion
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[8905] | 386 |
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[10744] | 387 | #region IProblemInstanceConsumer<VRPData> Members
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[8905] | 388 |
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[11333] | 389 | public void Load(IVRPData data) {
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[10744] | 390 | var interpreterDataType = data.GetType();
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| 391 | var interpreterType = typeof(IVRPDataInterpreter<>).MakeGenericType(interpreterDataType);
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[8905] | 392 |
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[10744] | 393 | var interpreters = ApplicationManager.Manager.GetTypes(interpreterType);
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[8905] | 394 |
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[10744] | 395 | var concreteInterpreter = interpreters.Single(t => GetInterpreterDataType(t) == interpreterDataType);
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| 396 |
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| 397 | Load(data, (IVRPDataInterpreter)Activator.CreateInstance(concreteInterpreter));
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[8905] | 398 | }
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| 399 |
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[10744] | 400 | private Type GetInterpreterDataType(Type type) {
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| 401 | var parentInterfaces = type.BaseType.GetInterfaces();
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| 402 | var interfaces = type.GetInterfaces().Except(parentInterfaces);
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| 403 |
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| 404 | var interpreterInterface = interfaces.Single(i => typeof(IVRPDataInterpreter).IsAssignableFrom(i));
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| 405 | return interpreterInterface.GetGenericArguments()[0];
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[8905] | 406 | }
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| 407 |
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| 408 | #endregion
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[4360] | 409 | }
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| 410 | }
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