source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.4/VehicleRoutingProblem.cs @ 14481

Last change on this file since 14481 was 14481, checked in by pfleck, 3 years ago

#2705

  • Added best-known quality-only solutions for the Solomon benchmark set (from http://web.cba.neu.edu/~msolomon/problems.htm).
  • The best-known-quality is not set to null if the BestKnownSolution is null after the evaluation. Instead it is reset if the evaluator changes.
File size: 16.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using HeuristicLab.Analysis;
27using HeuristicLab.Common;
28using HeuristicLab.Core;
29using HeuristicLab.Data;
30using HeuristicLab.Optimization;
31using HeuristicLab.Optimization.Operators;
32using HeuristicLab.Parameters;
33using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
34using HeuristicLab.PluginInfrastructure;
35using HeuristicLab.Problems.Instances;
36using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
37using HeuristicLab.Problems.VehicleRouting.Interfaces;
38using HeuristicLab.Problems.VehicleRouting.Interpreters;
39using HeuristicLab.Problems.VehicleRouting.ProblemInstances;
40using HeuristicLab.Problems.VehicleRouting.Variants;
41
42namespace HeuristicLab.Problems.VehicleRouting {
43  [Item("Vehicle Routing Problem (VRP)", "Represents a Vehicle Routing Problem.")]
44  [Creatable(CreatableAttribute.Categories.CombinatorialProblems, Priority = 110)]
45  [StorableClass]
46  public sealed class VehicleRoutingProblem : Problem, ISingleObjectiveHeuristicOptimizationProblem, IStorableContent, IProblemInstanceConsumer<IVRPData> {
47    public string Filename { get; set; }
48
49    public static new Image StaticItemImage {
50      get { return HeuristicLab.Common.Resources.VSImageLibrary.Type; }
51    }
52
53    #region Parameter Properties
54    public ValueParameter<BoolValue> MaximizationParameter {
55      get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
56    }
57    IParameter ISingleObjectiveHeuristicOptimizationProblem.MaximizationParameter {
58      get { return MaximizationParameter; }
59    }
60    public ValueParameter<IVRPProblemInstance> ProblemInstanceParameter {
61      get { return (ValueParameter<IVRPProblemInstance>)Parameters["ProblemInstance"]; }
62    }
63    public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
64      get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
65    }
66    IParameter ISingleObjectiveHeuristicOptimizationProblem.BestKnownQualityParameter {
67      get { return BestKnownQualityParameter; }
68    }
69    public OptionalValueParameter<VRPSolution> BestKnownSolutionParameter {
70      get { return (OptionalValueParameter<VRPSolution>)Parameters["BestKnownSolution"]; }
71    }
72    public IConstrainedValueParameter<IVRPCreator> SolutionCreatorParameter {
73      get { return (IConstrainedValueParameter<IVRPCreator>)Parameters["SolutionCreator"]; }
74    }
75    IParameter IHeuristicOptimizationProblem.SolutionCreatorParameter {
76      get { return SolutionCreatorParameter; }
77    }
78    public IValueParameter<IVRPEvaluator> EvaluatorParameter {
79      get { return (IValueParameter<IVRPEvaluator>)Parameters["Evaluator"]; }
80    }
81    IParameter IHeuristicOptimizationProblem.EvaluatorParameter {
82      get { return EvaluatorParameter; }
83    }
84    #endregion
85
86    #region Properties
87    public IVRPProblemInstance ProblemInstance {
88      get { return ProblemInstanceParameter.Value; }
89      set { ProblemInstanceParameter.Value = value; }
90    }
91
92    public VRPSolution BestKnownSolution {
93      get { return BestKnownSolutionParameter.Value; }
94      set { BestKnownSolutionParameter.Value = value; }
95    }
96
97    public DoubleValue BestKnownQuality {
98      get { return BestKnownQualityParameter.Value; }
99      set { BestKnownQualityParameter.Value = value; }
100    }
101
102    public ISingleObjectiveEvaluator Evaluator {
103      get { return EvaluatorParameter.Value; }
104    }
105
106    IEvaluator IHeuristicOptimizationProblem.Evaluator {
107      get { return this.Evaluator; }
108    }
109
110    ISolutionCreator IHeuristicOptimizationProblem.SolutionCreator {
111      get { return SolutionCreatorParameter.Value; }
112    }
113    public IVRPCreator SolutionCreator {
114      get { return SolutionCreatorParameter.Value; }
115      set { SolutionCreatorParameter.Value = value; }
116    }
117    #endregion
118
119    [StorableConstructor]
120    private VehicleRoutingProblem(bool deserializing) : base(deserializing) { }
121    public VehicleRoutingProblem()
122      : base() {
123      Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Vehicle Routing Problem is a minimization problem.", new BoolValue(false)));
124      Parameters.Add(new ValueParameter<IVRPProblemInstance>("ProblemInstance", "The VRP problem instance"));
125      Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this VRP instance."));
126      Parameters.Add(new OptionalValueParameter<VRPSolution>("BestKnownSolution", "The best known solution of this VRP instance."));
127
128      Parameters.Add(new ConstrainedValueParameter<IVRPCreator>("SolutionCreator", "The operator which should be used to create new VRP solutions."));
129      Parameters.Add(new ValueParameter<IVRPEvaluator>("Evaluator", "The operator which should be used to evaluate VRP solutions."));
130
131      EvaluatorParameter.Hidden = true;
132
133      InitializeRandomVRPInstance();
134      InitializeOperators();
135
136      AttachEventHandlers();
137      AttachProblemInstanceEventHandlers();
138
139      EvaluatorParameter.Value = ProblemInstance.SolutionEvaluator;
140    }
141
142    public override IDeepCloneable Clone(Cloner cloner) {
143      cloner.Clone(ProblemInstance);
144      return new VehicleRoutingProblem(this, cloner);
145    }
146
147    private VehicleRoutingProblem(VehicleRoutingProblem original, Cloner cloner)
148      : base(original, cloner) {
149      this.AttachEventHandlers();
150      this.AttachProblemInstanceEventHandlers();
151
152      ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
153    }
154
155    #region Events
156    public event EventHandler SolutionCreatorChanged;
157    private void OnSolutionCreatorChanged() {
158      EventHandler handler = SolutionCreatorChanged;
159      if (handler != null) handler(this, EventArgs.Empty);
160    }
161    public event EventHandler EvaluatorChanged;
162    private void OnEvaluatorChanged() {
163      EventHandler handler = EvaluatorChanged;
164      if (handler != null) handler(this, EventArgs.Empty);
165    }
166    #endregion
167
168    #region Helpers
169    [StorableHook(HookType.AfterDeserialization)]
170    private void AfterDeserialization() {
171      AttachEventHandlers();
172      AttachProblemInstanceEventHandlers();
173
174      ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
175    }
176
177    [Storable(Name = "operators", AllowOneWay = true)]
178    private List<IOperator> StorableOperators {
179      set { Operators.AddRange(value); }
180    }
181
182    private void AttachEventHandlers() {
183      ProblemInstanceParameter.ValueChanged += new EventHandler(ProblemInstanceParameter_ValueChanged);
184      BestKnownSolutionParameter.ValueChanged += new EventHandler(BestKnownSolutionParameter_ValueChanged);
185      EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
186      SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
187    }
188
189    private void AttachProblemInstanceEventHandlers() {
190      if (ProblemInstance != null) {
191        ProblemInstance.EvaluationChanged += new EventHandler(ProblemInstance_EvaluationChanged);
192      }
193    }
194
195    private void EvalBestKnownSolution() {
196      if (BestKnownSolution != null) {
197        //call evaluator
198        BestKnownQuality = new DoubleValue(ProblemInstance.Evaluate(BestKnownSolution.Solution).Quality);
199        BestKnownSolution.Quality = BestKnownQuality;
200      }
201    }
202
203    void BestKnownSolutionParameter_ValueChanged(object sender, EventArgs e) {
204      EvalBestKnownSolution();
205    }
206
207    void ProblemInstance_EvaluationChanged(object sender, EventArgs e) {
208      BestKnownQuality = null;
209      EvalBestKnownSolution();
210    }
211
212    void ProblemInstanceParameter_ValueChanged(object sender, EventArgs e) {
213      InitializeOperators();
214      AttachProblemInstanceEventHandlers();
215
216      EvaluatorParameter.Value = ProblemInstance.SolutionEvaluator;
217
218      OnSolutionCreatorChanged();
219      OnEvaluatorChanged();
220      OnOperatorsChanged();
221    }
222
223    public void SetProblemInstance(IVRPProblemInstance instance) {
224      ProblemInstanceParameter.ValueChanged -= new EventHandler(ProblemInstanceParameter_ValueChanged);
225
226      ProblemInstance = instance;
227      AttachProblemInstanceEventHandlers();
228
229      OnSolutionCreatorChanged();
230      OnEvaluatorChanged();
231
232      ProblemInstanceParameter.ValueChanged += new EventHandler(ProblemInstanceParameter_ValueChanged);
233    }
234
235    private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
236      OnSolutionCreatorChanged();
237    }
238    private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
239      if (ProblemInstance != null)
240        ProblemInstance.SolutionEvaluator = EvaluatorParameter.Value;
241      OnEvaluatorChanged();
242    }
243
244    private void InitializeOperators() {
245      var solutionCreatorParameter = SolutionCreatorParameter as ConstrainedValueParameter<IVRPCreator>;
246      solutionCreatorParameter.ValidValues.Clear();
247
248      Operators.Clear();
249
250      if (ProblemInstance != null) {
251        Operators.AddRange(
252        ProblemInstance.Operators.Concat(
253          ApplicationManager.Manager.GetInstances<IGeneralVRPOperator>().Cast<IOperator>()).OrderBy(op => op.Name));
254        Operators.Add(new VRPSimilarityCalculator());
255        Operators.Add(new QualitySimilarityCalculator());
256        Operators.Add(new NoSimilarityCalculator());
257        Operators.Add(new PopulationSimilarityAnalyzer(Operators.OfType<ISolutionSimilarityCalculator>()));
258
259        IVRPCreator defaultCreator = null;
260        foreach (IVRPCreator creator in Operators.Where(o => o is IVRPCreator)) {
261          solutionCreatorParameter.ValidValues.Add(creator);
262          if (creator is Encodings.Alba.RandomCreator)
263            defaultCreator = creator;
264        }
265        Operators.Add(new AlbaLambdaInterchangeLocalImprovementOperator());
266        if (defaultCreator != null)
267          solutionCreatorParameter.Value = defaultCreator;
268      }
269
270      ParameterizeOperators();
271    }
272
273    private void ParameterizeOperators() {
274      foreach (IOperator op in Operators.OfType<IOperator>()) {
275        if (op is IMultiVRPOperator) {
276          (op as IMultiVRPOperator).SetOperators(Operators.OfType<IOperator>());
277        }
278      }
279      if (ProblemInstance != null) {
280        foreach (ISingleObjectiveImprovementOperator op in Operators.OfType<ISingleObjectiveImprovementOperator>()) {
281          op.SolutionParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
282          op.SolutionParameter.Hidden = true;
283        }
284        foreach (ISingleObjectivePathRelinker op in Operators.OfType<ISingleObjectivePathRelinker>()) {
285          op.ParentsParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
286          op.ParentsParameter.Hidden = true;
287        }
288        foreach (ISolutionSimilarityCalculator op in Operators.OfType<ISolutionSimilarityCalculator>()) {
289          op.SolutionVariableName = SolutionCreator.VRPToursParameter.ActualName;
290          op.QualityVariableName = ProblemInstance.SolutionEvaluator.QualityParameter.ActualName;
291          var calc = op as VRPSimilarityCalculator;
292          if (calc != null) calc.ProblemInstance = ProblemInstance;
293        }
294      }
295    }
296
297    #endregion
298
299    private void InitializeRandomVRPInstance() {
300      System.Random rand = new System.Random();
301
302      CVRPTWProblemInstance problem = new CVRPTWProblemInstance();
303      int cities = 100;
304
305      problem.Coordinates = new DoubleMatrix(cities + 1, 2);
306      problem.Demand = new DoubleArray(cities + 1);
307      problem.DueTime = new DoubleArray(cities + 1);
308      problem.ReadyTime = new DoubleArray(cities + 1);
309      problem.ServiceTime = new DoubleArray(cities + 1);
310
311      problem.Vehicles.Value = 100;
312      problem.Capacity.Value = 200;
313
314      for (int i = 0; i <= cities; i++) {
315        problem.Coordinates[i, 0] = rand.Next(0, 100);
316        problem.Coordinates[i, 1] = rand.Next(0, 100);
317
318        if (i == 0) {
319          problem.Demand[i] = 0;
320          problem.DueTime[i] = Int16.MaxValue;
321          problem.ReadyTime[i] = 0;
322          problem.ServiceTime[i] = 0;
323        } else {
324          problem.Demand[i] = rand.Next(10, 50);
325          problem.DueTime[i] = rand.Next((int)Math.Ceiling(problem.GetDistance(0, i, null)), 1200);
326          problem.ReadyTime[i] = problem.DueTime[i] - rand.Next(0, 100);
327          problem.ServiceTime[i] = 90;
328        }
329      }
330
331      this.ProblemInstance = problem;
332    }
333
334    public void ImportSolution(string solutionFileName) {
335      SolutionParser parser = new SolutionParser(solutionFileName);
336      parser.Parse();
337
338      HeuristicLab.Problems.VehicleRouting.Encodings.Potvin.PotvinEncoding encoding = new Encodings.Potvin.PotvinEncoding(ProblemInstance);
339
340      int cities = 0;
341      foreach (List<int> route in parser.Routes) {
342        Tour tour = new Tour();
343        tour.Stops.AddRange(route);
344        cities += tour.Stops.Count;
345
346        encoding.Tours.Add(tour);
347      }
348
349      if (cities != ProblemInstance.Coordinates.Rows - 1)
350        ErrorHandling.ShowErrorDialog(new Exception("The optimal solution does not seem to correspond with the problem data"));
351      else {
352        VRPSolution solution = new VRPSolution(ProblemInstance, encoding, new DoubleValue(0));
353        BestKnownSolutionParameter.Value = solution;
354      }
355    }
356
357    #region Instance Consuming
358    public void Load(IVRPData data, IVRPDataInterpreter interpreter) {
359      VRPInstanceDescription instance = interpreter.Interpret(data);
360
361      Name = instance.Name;
362      Description = instance.Description;
363
364      BestKnownQuality = null;
365      BestKnownSolution = null;
366
367      if (ProblemInstance != null && instance.ProblemInstance != null &&
368        instance.ProblemInstance.GetType() == ProblemInstance.GetType())
369        SetProblemInstance(instance.ProblemInstance);
370      else
371        ProblemInstance = instance.ProblemInstance;
372
373      OnReset();
374
375      if (instance.BestKnownQuality != null) {
376        BestKnownQuality = new DoubleValue((double)instance.BestKnownQuality);
377      }
378
379      if (instance.BestKnownSolution != null) {
380        VRPSolution solution = new VRPSolution(ProblemInstance, instance.BestKnownSolution, new DoubleValue(0));
381        BestKnownSolution = solution;
382      }
383    }
384    #endregion
385
386    #region IProblemInstanceConsumer<VRPData> Members
387
388    public void Load(IVRPData data) {
389      var interpreterDataType = data.GetType();
390      var interpreterType = typeof(IVRPDataInterpreter<>).MakeGenericType(interpreterDataType);
391
392      var interpreters = ApplicationManager.Manager.GetTypes(interpreterType);
393
394      var concreteInterpreter = interpreters.Single(t => GetInterpreterDataType(t) == interpreterDataType);
395
396      Load(data, (IVRPDataInterpreter)Activator.CreateInstance(concreteInterpreter));
397    }
398
399    private Type GetInterpreterDataType(Type type) {
400      var parentInterfaces = type.BaseType.GetInterfaces();
401      var interfaces = type.GetInterfaces().Except(parentInterfaces);
402
403      var interpreterInterface = interfaces.Single(i => typeof(IVRPDataInterpreter).IsAssignableFrom(i));
404      return interpreterInterface.GetGenericArguments()[0];
405    }
406
407    #endregion
408  }
409}
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