Free cookie consent management tool by TermsFeed Policy Generator

source: branches/PersistenceSpeedUp/HeuristicLab.Problems.QuadraticAssignment/3.3/QuadraticAssignmentProblem.cs @ 11312

Last change on this file since 11312 was 6760, checked in by epitzer, 13 years ago

#1530 integrate changes from trunk
File size: 21.6 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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.IO;
26using System.Linq;
27using System.Reflection;
28using HeuristicLab.Common;
29using HeuristicLab.Core;
30using HeuristicLab.Data;
31using HeuristicLab.Encodings.PermutationEncoding;
32using HeuristicLab.Optimization;
33using HeuristicLab.Parameters;
34using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
35using HeuristicLab.PluginInfrastructure;
36
37namespace HeuristicLab.Problems.QuadraticAssignment {
38  [Item("Quadratic Assignment Problem", "The Quadratic Assignment Problem (QAP) can be described as the problem of assigning N facilities to N fixed locations such that there is exactly one facility in each location and that the sum of the distances multiplied by the connection strength between the facilities becomes minimal.")]
39  [Creatable("Problems")]
40  [StorableClass]
41  public sealed class QuadraticAssignmentProblem : SingleObjectiveHeuristicOptimizationProblem<IQAPEvaluator, IPermutationCreator>, IStorableContent {
42    private static string InstancePrefix = "HeuristicLab.Problems.QuadraticAssignment.Data.";
43
44    public string Filename { get; set; }
45
46    public override Image ItemImage {
47      get { return HeuristicLab.Common.Resources.VSImageLibrary.Type; }
48    }
49
50    #region Parameter Properties
51    public IValueParameter<ItemSet<Permutation>> BestKnownSolutionsParameter {
52      get { return (IValueParameter<ItemSet<Permutation>>)Parameters["BestKnownSolutions"]; }
53    }
54    public IValueParameter<Permutation> BestKnownSolutionParameter {
55      get { return (IValueParameter<Permutation>)Parameters["BestKnownSolution"]; }
56    }
57    public IValueParameter<DoubleMatrix> WeightsParameter {
58      get { return (IValueParameter<DoubleMatrix>)Parameters["Weights"]; }
59    }
60    public IValueParameter<DoubleMatrix> DistancesParameter {
61      get { return (IValueParameter<DoubleMatrix>)Parameters["Distances"]; }
62    }
63    #endregion
64
65    #region Properties
66    public ItemSet<Permutation> BestKnownSolutions {
67      get { return BestKnownSolutionsParameter.Value; }
68      set { BestKnownSolutionsParameter.Value = value; }
69    }
70    public Permutation BestKnownSolution {
71      get { return BestKnownSolutionParameter.Value; }
72      set { BestKnownSolutionParameter.Value = value; }
73    }
74    public DoubleMatrix Weights {
75      get { return WeightsParameter.Value; }
76      set { WeightsParameter.Value = value; }
77    }
78    public DoubleMatrix Distances {
79      get { return DistancesParameter.Value; }
80      set { DistancesParameter.Value = value; }
81    }
82
83    public IEnumerable<string> EmbeddedInstances {
84      get {
85        return Assembly.GetExecutingAssembly()
86          .GetManifestResourceNames()
87          .Where(x => x.EndsWith(".dat"))
88          .OrderBy(x => x)
89          .Select(x => x.Replace(".dat", String.Empty))
90          .Select(x => x.Replace(InstancePrefix, String.Empty));
91      }
92    }
93
94    private BestQAPSolutionAnalyzer BestQAPSolutionAnalyzer {
95      get { return Operators.OfType<BestQAPSolutionAnalyzer>().FirstOrDefault(); }
96    }
97
98    private QAPAlleleFrequencyAnalyzer QAPAlleleFrequencyAnalyzer {
99      get { return Operators.OfType<QAPAlleleFrequencyAnalyzer>().FirstOrDefault(); }
100    }
101
102    private QAPPopulationDiversityAnalyzer QAPPopulationDiversityAnalyzer {
103      get { return Operators.OfType<QAPPopulationDiversityAnalyzer>().FirstOrDefault(); }
104    }
105    #endregion
106
107    [StorableConstructor]
108    private QuadraticAssignmentProblem(bool deserializing) : base(deserializing) { }
109    private QuadraticAssignmentProblem(QuadraticAssignmentProblem original, Cloner cloner)
110      : base(original, cloner) {
111      AttachEventHandlers();
112    }
113    public QuadraticAssignmentProblem()
114      : base(new QAPEvaluator(), new RandomPermutationCreator()) {
115      Parameters.Add(new OptionalValueParameter<ItemSet<Permutation>>("BestKnownSolutions", "The list of best known solutions which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", null));
116      Parameters.Add(new OptionalValueParameter<Permutation>("BestKnownSolution", "The best known solution which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", null));
117      Parameters.Add(new ValueParameter<DoubleMatrix>("Weights", "The strength of the connection between the facilities.", new DoubleMatrix(5, 5)));
118      Parameters.Add(new ValueParameter<DoubleMatrix>("Distances", "The distance matrix which can either be specified directly without the coordinates, or can be calculated automatically from the coordinates.", new DoubleMatrix(5, 5)));
119
120      Maximization = new BoolValue(false);
121
122      Weights = new DoubleMatrix(new double[,] {
123        { 0, 1, 0, 0, 1 },
124        { 1, 0, 1, 0, 0 },
125        { 0, 1, 0, 1, 0 },
126        { 0, 0, 1, 0, 1 },
127        { 1, 0, 0, 1, 0 }
128      });
129
130      Distances = new DoubleMatrix(new double[,] {
131        {   0, 360, 582, 582, 360 },
132        { 360,   0, 360, 582, 582 },
133        { 582, 360,   0, 360, 582 },
134        { 582, 582, 360,   0, 360 },
135        { 360, 582, 582, 360,   0 }
136      });
137
138      SolutionCreator.PermutationParameter.ActualName = "Assignment";
139      ParameterizeSolutionCreator();
140      ParameterizeEvaluator();
141
142      InitializeOperators();
143      AttachEventHandlers();
144    }
145
146    public override IDeepCloneable Clone(Cloner cloner) {
147      return new QuadraticAssignmentProblem(this, cloner);
148    }
149
150    [StorableHook(HookType.AfterDeserialization)]
151    private void AfterDeserialization() {
152      // BackwardsCompatibility3.3
153      #region Backwards compatible code, remove with 3.4
154      if (!Parameters.ContainsKey("BestKnownSolutions")) {
155        Parameters.Add(new OptionalValueParameter<ItemSet<Permutation>>("BestKnownSolutions", "The list of best known solutions which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", null));
156      } else if (Parameters["BestKnownSolutions"].GetType().Equals(typeof(OptionalValueParameter<ItemList<Permutation>>))) {
157        ItemList<Permutation> list = ((OptionalValueParameter<ItemList<Permutation>>)Parameters["BestKnownSolutions"]).Value;
158        Parameters.Remove("BestKnownSolutions");
159        Parameters.Add(new OptionalValueParameter<ItemSet<Permutation>>("BestKnownSolutions", "The list of best known solutions which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", (list != null ? new ItemSet<Permutation>(list) : null)));
160      }
161      if (Parameters.ContainsKey("DistanceMatrix")) {
162        DoubleMatrix d = ((ValueParameter<DoubleMatrix>)Parameters["DistanceMatrix"]).Value;
163        Parameters.Remove("DistanceMatrix");
164        Parameters.Add(new ValueParameter<DoubleMatrix>("Distances", "The distance matrix which can either be specified directly without the coordinates, or can be calculated automatically from the coordinates.", d));
165      }
166      AttachEventHandlers();
167      #endregion
168    }
169
170    #region Events
171    protected override void OnSolutionCreatorChanged() {
172      SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
173      ParameterizeSolutionCreator();
174      ParameterizeEvaluator();
175      ParameterizeAnalyzers();
176      ParameterizeOperators();
177      base.OnSolutionCreatorChanged();
178    }
179    protected override void OnEvaluatorChanged() {
180      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
181      ParameterizeEvaluator();
182      ParameterizeAnalyzers();
183      ParameterizeOperators();
184      base.OnEvaluatorChanged();
185    }
186
187    private void SolutionCreator_PermutationParameter_ActualNameChanged(object sender, EventArgs e) {
188      ParameterizeEvaluator();
189      ParameterizeAnalyzers();
190      ParameterizeOperators();
191    }
192    private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
193      ParameterizeAnalyzers();
194      ParameterizeOperators();
195    }
196    private void WeightsParameter_ValueChanged(object sender, EventArgs e) {
197      Weights.RowsChanged += new EventHandler(Weights_RowsChanged);
198      Weights.ColumnsChanged += new EventHandler(Weights_ColumnsChanged);
199      ParameterizeSolutionCreator();
200      ParameterizeEvaluator();
201      ParameterizeOperators();
202      AdjustDistanceMatrix();
203    }
204    private void Weights_RowsChanged(object sender, EventArgs e) {
205      if (Weights.Rows != Weights.Columns)
206        ((IStringConvertibleMatrix)Weights).Columns = Weights.Rows;
207      else {
208        ParameterizeSolutionCreator();
209        ParameterizeEvaluator();
210        ParameterizeOperators();
211        AdjustDistanceMatrix();
212      }
213    }
214    private void Weights_ColumnsChanged(object sender, EventArgs e) {
215      if (Weights.Rows != Weights.Columns)
216        ((IStringConvertibleMatrix)Weights).Rows = Weights.Columns;
217      else {
218        ParameterizeSolutionCreator();
219        ParameterizeEvaluator();
220        ParameterizeOperators();
221        AdjustDistanceMatrix();
222      }
223    }
224    private void DistancesParameter_ValueChanged(object sender, EventArgs e) {
225      Distances.RowsChanged += new EventHandler(Distances_RowsChanged);
226      Distances.ColumnsChanged += new EventHandler(Distances_ColumnsChanged);
227      ParameterizeSolutionCreator();
228      ParameterizeEvaluator();
229      ParameterizeOperators();
230      AdjustWeightsMatrix();
231    }
232    private void Distances_RowsChanged(object sender, EventArgs e) {
233      if (Distances.Rows != Distances.Columns)
234        ((IStringConvertibleMatrix)Distances).Columns = Distances.Rows;
235      else {
236        ParameterizeSolutionCreator();
237        ParameterizeEvaluator();
238        ParameterizeOperators();
239        AdjustWeightsMatrix();
240      }
241    }
242    private void Distances_ColumnsChanged(object sender, EventArgs e) {
243      if (Distances.Rows != Distances.Columns)
244        ((IStringConvertibleMatrix)Distances).Rows = Distances.Columns;
245      else {
246        ParameterizeSolutionCreator();
247        ParameterizeEvaluator();
248        ParameterizeOperators();
249        AdjustWeightsMatrix();
250      }
251    }
252    #endregion
253
254    #region Helpers
255    private void AttachEventHandlers() {
256      SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
257      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
258      WeightsParameter.ValueChanged += new EventHandler(WeightsParameter_ValueChanged);
259      Weights.RowsChanged += new EventHandler(Weights_RowsChanged);
260      Weights.ColumnsChanged += new EventHandler(Weights_ColumnsChanged);
261      DistancesParameter.ValueChanged += new EventHandler(DistancesParameter_ValueChanged);
262      Distances.RowsChanged += new EventHandler(Distances_RowsChanged);
263      Distances.ColumnsChanged += new EventHandler(Distances_ColumnsChanged);
264    }
265
266    private void InitializeOperators() {
267      Operators.AddRange(ApplicationManager.Manager.GetInstances<IPermutationOperator>());
268      Operators.RemoveAll(x => x is ISingleObjectiveMoveEvaluator);
269      Operators.AddRange(ApplicationManager.Manager.GetInstances<IQAPMoveEvaluator>());
270      Operators.Add(new BestQAPSolutionAnalyzer());
271      Operators.Add(new QAPAlleleFrequencyAnalyzer());
272      Operators.Add(new QAPPopulationDiversityAnalyzer());
273      Operators.Add(new QAPExhaustiveSwap2LocalImprovement());
274      ParameterizeAnalyzers();
275      ParameterizeOperators();
276    }
277    private void ParameterizeSolutionCreator() {
278      if (SolutionCreator != null) {
279        SolutionCreator.PermutationTypeParameter.Value = new PermutationType(PermutationTypes.Absolute);
280        SolutionCreator.LengthParameter.Value = new IntValue(Weights.Rows);
281      }
282    }
283    private void ParameterizeEvaluator() {
284      if (Evaluator != null) {
285        Evaluator.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
286        Evaluator.DistancesParameter.ActualName = DistancesParameter.Name;
287        Evaluator.WeightsParameter.ActualName = WeightsParameter.Name;
288      }
289    }
290    private void ParameterizeAnalyzers() {
291      if (BestQAPSolutionAnalyzer != null) {
292        BestQAPSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
293        BestQAPSolutionAnalyzer.DistancesParameter.ActualName = DistancesParameter.Name;
294        BestQAPSolutionAnalyzer.WeightsParameter.ActualName = WeightsParameter.Name;
295        BestQAPSolutionAnalyzer.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
296        BestQAPSolutionAnalyzer.ResultsParameter.ActualName = "Results";
297        BestQAPSolutionAnalyzer.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
298        BestQAPSolutionAnalyzer.BestKnownSolutionsParameter.ActualName = BestKnownSolutionsParameter.Name;
299        BestQAPSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
300      }
301      if (QAPAlleleFrequencyAnalyzer != null) {
302        QAPAlleleFrequencyAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
303        QAPAlleleFrequencyAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
304        QAPAlleleFrequencyAnalyzer.DistancesParameter.ActualName = DistancesParameter.Name;
305        QAPAlleleFrequencyAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
306        QAPAlleleFrequencyAnalyzer.ResultsParameter.ActualName = "Results";
307        QAPAlleleFrequencyAnalyzer.SolutionParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
308        QAPAlleleFrequencyAnalyzer.WeightsParameter.ActualName = WeightsParameter.Name;
309      }
310      if (QAPPopulationDiversityAnalyzer != null) {
311        QAPPopulationDiversityAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
312        QAPPopulationDiversityAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
313        QAPPopulationDiversityAnalyzer.ResultsParameter.ActualName = "Results";
314        QAPPopulationDiversityAnalyzer.SolutionParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
315      }
316    }
317    private void ParameterizeOperators() {
318      foreach (IPermutationCrossover op in Operators.OfType<IPermutationCrossover>()) {
319        op.ParentsParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
320        op.ChildParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
321      }
322      foreach (IPermutationManipulator op in Operators.OfType<IPermutationManipulator>()) {
323        op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
324      }
325      foreach (IPermutationMoveOperator op in Operators.OfType<IPermutationMoveOperator>()) {
326        op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
327      }
328      if (Operators.OfType<IMoveGenerator>().Any()) {
329        string inversionMove = Operators.OfType<IMoveGenerator>().OfType<IPermutationInversionMoveOperator>().First().InversionMoveParameter.ActualName;
330        foreach (IPermutationInversionMoveOperator op in Operators.OfType<IPermutationInversionMoveOperator>())
331          op.InversionMoveParameter.ActualName = inversionMove;
332        string translocationMove = Operators.OfType<IMoveGenerator>().OfType<IPermutationTranslocationMoveOperator>().First().TranslocationMoveParameter.ActualName;
333        foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>())
334          op.TranslocationMoveParameter.ActualName = translocationMove;
335        string swapMove = Operators.OfType<IMoveGenerator>().OfType<IPermutationSwap2MoveOperator>().First().Swap2MoveParameter.ActualName;
336        foreach (IPermutationSwap2MoveOperator op in Operators.OfType<IPermutationSwap2MoveOperator>()) {
337          op.Swap2MoveParameter.ActualName = swapMove;
338        }
339      }
340      foreach (var op in Operators.OfType<IPermutationMultiNeighborhoodShakingOperator>())
341        op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
342
343      QAPExhaustiveSwap2LocalImprovement localOpt = Operators.OfType<QAPExhaustiveSwap2LocalImprovement>().SingleOrDefault();
344      if (localOpt != null) {
345        localOpt.AssignmentParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
346        localOpt.DistancesParameter.ActualName = DistancesParameter.Name;
347        localOpt.MaximizationParameter.ActualName = MaximizationParameter.Name;
348        localOpt.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
349        localOpt.WeightsParameter.ActualName = WeightsParameter.Name;
350      }
351    }
352
353    private void AdjustDistanceMatrix() {
354      if (Distances.Rows != Weights.Rows || Distances.Columns != Weights.Columns) {
355        ((IStringConvertibleMatrix)Distances).Rows = Weights.Rows;
356      }
357    }
358
359    private void AdjustWeightsMatrix() {
360      if (Weights.Rows != Distances.Rows || Weights.Columns != Distances.Columns) {
361        ((IStringConvertibleMatrix)Weights).Rows = Distances.Rows;
362      }
363    }
364    #endregion
365
366    public void ImportFileInstance(string filename) {
367      QAPLIBParser parser = new QAPLIBParser();
368      parser.Parse(filename);
369      if (parser.Error != null) throw parser.Error;
370      Distances = new DoubleMatrix(parser.Distances);
371      Weights = new DoubleMatrix(parser.Weights);
372      Name = "Quadratic Assignment Problem (imported from " + Path.GetFileNameWithoutExtension(filename) + ")";
373      Description = "Imported problem data using QAPLIBParser " + Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyFileVersionAttribute), true).Cast<AssemblyFileVersionAttribute>().FirstOrDefault().Version + ".";
374      BestKnownQuality = null;
375      BestKnownSolutions = null;
376      OnReset();
377    }
378
379    public void LoadEmbeddedInstance(string instance) {
380      using (Stream stream = Assembly.GetExecutingAssembly()
381        .GetManifestResourceStream(InstancePrefix + instance + ".dat")) {
382        QAPLIBParser parser = new QAPLIBParser();
383        parser.Parse(stream);
384        if (parser.Error != null) throw parser.Error;
385        Distances = new DoubleMatrix(parser.Distances);
386        Weights = new DoubleMatrix(parser.Weights);
387        Name = instance;
388        Description = "Loaded embedded QAPLIB problem data of instance " + instance + ".";
389        OnReset();
390      }
391      bool solutionExists = Assembly.GetExecutingAssembly()
392          .GetManifestResourceNames()
393          .Where(x => x.EndsWith(instance + ".sln"))
394          .Any();
395      if (solutionExists) {
396        using (Stream solStream = Assembly.GetExecutingAssembly()
397          .GetManifestResourceStream(InstancePrefix + instance + ".sln")) {
398          QAPLIBSolutionParser solParser = new QAPLIBSolutionParser();
399          solParser.Parse(solStream, true); // most sln's seem to be of the type index = "facility" => value = "location"
400          if (solParser.Error != null) throw solParser.Error;
401          if (!solParser.Quality.IsAlmost(QAPEvaluator.Apply(new Permutation(PermutationTypes.Absolute, solParser.Assignment), Weights, Distances))) {
402            solStream.Seek(0, SeekOrigin.Begin);
403            solParser.Reset();
404            solParser.Parse(solStream, false); // some sln's seem to be of the type index = "location" => value = "facility"
405            if (solParser.Error != null) throw solParser.Error;
406            if (solParser.Quality.IsAlmost(QAPEvaluator.Apply(new Permutation(PermutationTypes.Absolute, solParser.Assignment), Weights, Distances))) {
407              BestKnownQuality = new DoubleValue(solParser.Quality);
408              BestKnownSolutions = new ItemSet<Permutation>(new Permutation[] { new Permutation(PermutationTypes.Absolute, solParser.Assignment) }, new PermutationEqualityComparer());
409              BestKnownSolution = new Permutation(PermutationTypes.Absolute, solParser.Assignment);
410            } else {
411              BestKnownQuality = new DoubleValue(solParser.Quality);
412              BestKnownSolutions = null;
413              BestKnownSolution = null;
414            }
415          } else {
416            BestKnownQuality = new DoubleValue(solParser.Quality);
417            BestKnownSolutions = new ItemSet<Permutation>(new Permutation[] { new Permutation(PermutationTypes.Absolute, solParser.Assignment) }, new PermutationEqualityComparer());
418            BestKnownSolution = new Permutation(PermutationTypes.Absolute, solParser.Assignment);
419          }
420        }
421      } else {
422        BestKnownQuality = null;
423        BestKnownSolutions = new ItemSet<Permutation>(new PermutationEqualityComparer());
424        BestKnownSolution = null;
425      }
426    }
427  }
428}
Note: See TracBrowser for help on using the repository browser.