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source: trunk/sources/HeuristicLab.Algorithms.TabuSearch/3.3/TabuSearch.cs @ 11096

Last change on this file since 11096 was 11096, checked in by gkronber, 10 years ago

#2189 reviewed r11088 and tried to add comments to explain the code.

File size: 28.6 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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.Linq;
25using HeuristicLab.Analysis;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Operators;
30using HeuristicLab.Optimization;
31using HeuristicLab.Optimization.Operators;
32using HeuristicLab.Parameters;
33using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
34using HeuristicLab.Random;
35
36namespace HeuristicLab.Algorithms.TabuSearch {
37  [Item("Tabu Search", "A tabu search algorithm.")]
38  [Creatable("Algorithms")]
39  [StorableClass]
40  public sealed class TabuSearch : HeuristicOptimizationEngineAlgorithm, IStorableContent {
41    public string Filename { get; set; }
42
43    #region Problem Properties
44    public override Type ProblemType {
45      get { return typeof(ISingleObjectiveHeuristicOptimizationProblem); }
46    }
47    public new ISingleObjectiveHeuristicOptimizationProblem Problem {
48      get { return (ISingleObjectiveHeuristicOptimizationProblem)base.Problem; }
49      set { base.Problem = value; }
50    }
51    #endregion
52
53    #region Parameter Properties
54    private ValueParameter<IntValue> SeedParameter {
55      get { return (ValueParameter<IntValue>)Parameters["Seed"]; }
56    }
57    private ValueParameter<BoolValue> SetSeedRandomlyParameter {
58      get { return (ValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
59    }
60    public IConstrainedValueParameter<IMoveGenerator> MoveGeneratorParameter {
61      get { return (IConstrainedValueParameter<IMoveGenerator>)Parameters["MoveGenerator"]; }
62    }
63    public IConstrainedValueParameter<IMoveMaker> MoveMakerParameter {
64      get { return (IConstrainedValueParameter<IMoveMaker>)Parameters["MoveMaker"]; }
65    }
66    public IConstrainedValueParameter<ISingleObjectiveMoveEvaluator> MoveEvaluatorParameter {
67      get { return (IConstrainedValueParameter<ISingleObjectiveMoveEvaluator>)Parameters["MoveEvaluator"]; }
68    }
69    public IConstrainedValueParameter<ITabuChecker> TabuCheckerParameter {
70      get { return (IConstrainedValueParameter<ITabuChecker>)Parameters["TabuChecker"]; }
71    }
72    public IConstrainedValueParameter<ITabuMaker> TabuMakerParameter {
73      get { return (IConstrainedValueParameter<ITabuMaker>)Parameters["TabuMaker"]; }
74    }
75    private ValueParameter<IntValue> TabuTenureParameter {
76      get { return (ValueParameter<IntValue>)Parameters["TabuTenure"]; }
77    }
78    private ValueParameter<IntValue> MaximumIterationsParameter {
79      get { return (ValueParameter<IntValue>)Parameters["MaximumIterations"]; }
80    }
81    private ValueParameter<IntValue> SampleSizeParameter {
82      get { return (ValueParameter<IntValue>)Parameters["SampleSize"]; }
83    }
84    private ValueParameter<MultiAnalyzer> AnalyzerParameter {
85      get { return (ValueParameter<MultiAnalyzer>)Parameters["Analyzer"]; }
86    }
87    #endregion
88
89    #region Properties
90    public IntValue Seed {
91      get { return SeedParameter.Value; }
92      set { SeedParameter.Value = value; }
93    }
94    public BoolValue SetSeedRandomly {
95      get { return SetSeedRandomlyParameter.Value; }
96      set { SetSeedRandomlyParameter.Value = value; }
97    }
98    public IMoveGenerator MoveGenerator {
99      get { return MoveGeneratorParameter.Value; }
100      set { MoveGeneratorParameter.Value = value; }
101    }
102    public IMoveMaker MoveMaker {
103      get { return MoveMakerParameter.Value; }
104      set { MoveMakerParameter.Value = value; }
105    }
106    public ISingleObjectiveMoveEvaluator MoveEvaluator {
107      get { return MoveEvaluatorParameter.Value; }
108      set { MoveEvaluatorParameter.Value = value; }
109    }
110    public ITabuChecker TabuChecker {
111      get { return TabuCheckerParameter.Value; }
112      set { TabuCheckerParameter.Value = value; }
113    }
114    public ITabuMaker TabuMaker {
115      get { return TabuMakerParameter.Value; }
116      set { TabuMakerParameter.Value = value; }
117    }
118    public IntValue TabuTenure {
119      get { return TabuTenureParameter.Value; }
120      set { TabuTenureParameter.Value = value; }
121    }
122    public IntValue MaximumIterations {
123      get { return MaximumIterationsParameter.Value; }
124      set { MaximumIterationsParameter.Value = value; }
125    }
126    public IntValue SampleSize {
127      get { return SampleSizeParameter.Value; }
128      set { SampleSizeParameter.Value = value; }
129    }
130    public MultiAnalyzer Analyzer {
131      get { return AnalyzerParameter.Value; }
132      set { AnalyzerParameter.Value = value; }
133    }
134    private RandomCreator RandomCreator {
135      get { return (RandomCreator)OperatorGraph.InitialOperator; }
136    }
137    private SolutionsCreator SolutionsCreator {
138      get { return (SolutionsCreator)RandomCreator.Successor; }
139    }
140    private TabuSearchMainLoop MainLoop {
141      get { return FindMainLoop(SolutionsCreator.Successor); }
142    }
143    [Storable]
144    private BestAverageWorstQualityAnalyzer moveQualityAnalyzer;
145    [Storable]
146    private TabuNeighborhoodAnalyzer tabuNeighborhoodAnalyzer;
147    #endregion
148
149    public TabuSearch()
150      : base() {
151      Parameters.Add(new ValueParameter<IntValue>("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
152      Parameters.Add(new ValueParameter<BoolValue>("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
153      Parameters.Add(new ConstrainedValueParameter<IMoveGenerator>("MoveGenerator", "The operator used to generate moves to the neighborhood of the current solution."));
154      Parameters.Add(new ConstrainedValueParameter<IMoveMaker>("MoveMaker", "The operator used to perform a move."));
155      Parameters.Add(new ConstrainedValueParameter<ISingleObjectiveMoveEvaluator>("MoveEvaluator", "The operator used to evaluate a move."));
156      Parameters.Add(new ConstrainedValueParameter<ITabuChecker>("TabuChecker", "The operator to check whether a move is tabu or not."));
157      Parameters.Add(new ConstrainedValueParameter<ITabuMaker>("TabuMaker", "The operator used to insert attributes of a move into the tabu list."));
158      Parameters.Add(new ValueParameter<IntValue>("TabuTenure", "The length of the tabu list.", new IntValue(10)));
159      Parameters.Add(new ValueParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed.", new IntValue(1000)));
160      Parameters.Add(new ValueParameter<IntValue>("SampleSize", "The neighborhood size for stochastic sampling move generators", new IntValue(100)));
161      Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze the solution.", new MultiAnalyzer()));
162
163      RandomCreator randomCreator = new RandomCreator();
164      SolutionsCreator solutionsCreator = new SolutionsCreator();
165      VariableCreator variableCreator = new VariableCreator();
166      ResultsCollector resultsCollector = new ResultsCollector();
167      TabuSearchMainLoop mainLoop = new TabuSearchMainLoop();
168      OperatorGraph.InitialOperator = randomCreator;
169
170      randomCreator.RandomParameter.ActualName = "Random";
171      randomCreator.SeedParameter.ActualName = SeedParameter.Name;
172      randomCreator.SeedParameter.Value = null;
173      randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
174      randomCreator.SetSeedRandomlyParameter.Value = null;
175      randomCreator.Successor = solutionsCreator;
176
177      solutionsCreator.NumberOfSolutions = new IntValue(1);
178      solutionsCreator.Successor = variableCreator;
179
180      variableCreator.Name = "Initialize EvaluatedMoves";
181      variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("EvaluatedMoves", new IntValue()));
182      variableCreator.Successor = resultsCollector;
183
184      resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Evaluated Moves", null, "EvaluatedMoves"));
185      resultsCollector.ResultsParameter.ActualName = "Results";
186      resultsCollector.Successor = mainLoop;
187
188      mainLoop.MoveGeneratorParameter.ActualName = MoveGeneratorParameter.Name;
189      mainLoop.MoveMakerParameter.ActualName = MoveMakerParameter.Name;
190      mainLoop.MoveEvaluatorParameter.ActualName = MoveEvaluatorParameter.Name;
191      mainLoop.TabuCheckerParameter.ActualName = TabuCheckerParameter.Name;
192      mainLoop.TabuMakerParameter.ActualName = TabuMakerParameter.Name;
193      mainLoop.MaximumIterationsParameter.ActualName = MaximumIterationsParameter.Name;
194      mainLoop.RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
195      mainLoop.ResultsParameter.ActualName = "Results";
196      mainLoop.AnalyzerParameter.ActualName = AnalyzerParameter.Name;
197      mainLoop.EvaluatedMovesParameter.ActualName = "EvaluatedMoves";
198
199      moveQualityAnalyzer = new BestAverageWorstQualityAnalyzer();
200      tabuNeighborhoodAnalyzer = new TabuNeighborhoodAnalyzer();
201      ParameterizeAnalyzers();
202      UpdateAnalyzers();
203
204      Initialize();
205    }
206    [StorableConstructor]
207    private TabuSearch(bool deserializing) : base(deserializing) { }
208    [StorableHook(HookType.AfterDeserialization)]
209    private void AfterDeserialization() {
210      Initialize();
211    }
212    private TabuSearch(TabuSearch original, Cloner cloner)
213      : base(original, cloner) {
214      moveQualityAnalyzer = cloner.Clone(original.moveQualityAnalyzer);
215      tabuNeighborhoodAnalyzer = cloner.Clone(original.tabuNeighborhoodAnalyzer);
216      Initialize();
217    }
218    public override IDeepCloneable Clone(Cloner cloner) {
219      return new TabuSearch(this, cloner);
220    }
221
222    public override void Prepare() {
223      if (Problem != null && MoveGenerator != null && MoveMaker != null && MoveEvaluator != null &&
224          TabuChecker != null && TabuMaker != null)
225        base.Prepare();
226    }
227
228    #region Events
229    protected override void OnProblemChanged() {
230      ParameterizeStochasticOperator(Problem.SolutionCreator);
231      ParameterizeStochasticOperator(Problem.Evaluator);
232      foreach (IOperator op in Problem.Operators.OfType<IOperator>()) ParameterizeStochasticOperator(op);
233      foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
234        op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
235      }
236      foreach (ITabuChecker op in Problem.Operators.OfType<ITabuChecker>()) {
237        op.MoveTabuParameter.ActualNameChanged += new EventHandler(TabuChecker_MoveTabuParameter_ActualNameChanged);
238      }
239      ParameterizeSolutionsCreator();
240      ParameterizeMainLoop();
241      UpdateMoveGenerator();
242      UpdateMoveParameters();
243      UpdateAnalyzers();
244      ParameterizeMoveGenerators();
245      ParameterizeMoveEvaluator();
246      ParameterizeMoveMaker();
247      ParameterizeTabuMaker();
248      ParameterizeTabuChecker();
249      ParameterizeAnalyzers();
250      ParameterizeIterationBasedOperators();
251      Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
252      base.OnProblemChanged();
253    }
254    protected override void Problem_SolutionCreatorChanged(object sender, EventArgs e) {
255      ParameterizeStochasticOperator(Problem.SolutionCreator);
256      ParameterizeSolutionsCreator();
257      base.Problem_SolutionCreatorChanged(sender, e);
258    }
259    protected override void Problem_EvaluatorChanged(object sender, EventArgs e) {
260      ParameterizeStochasticOperator(Problem.Evaluator);
261      ParameterizeSolutionsCreator();
262      ParameterizeMainLoop();
263      ParameterizeMoveEvaluator();
264      ParameterizeMoveMaker();
265      ParameterizeTabuMaker();
266      ParameterizeTabuChecker();
267      ParameterizeAnalyzers();
268      Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
269      base.Problem_EvaluatorChanged(sender, e);
270    }
271    protected override void Problem_OperatorsChanged(object sender, EventArgs e) {
272      foreach (IOperator op in Problem.Operators.OfType<IOperator>()) ParameterizeStochasticOperator(op);
273      // This may seem pointless, but some operators already have the eventhandler registered, others don't
274      // FIXME: Is there another way to solve this problem?
275      foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
276        op.MoveQualityParameter.ActualNameChanged -= new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
277        op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
278      }
279      foreach (ITabuChecker op in Problem.Operators.OfType<ITabuChecker>()) {
280        op.MoveTabuParameter.ActualNameChanged -= new EventHandler(TabuChecker_MoveTabuParameter_ActualNameChanged);
281        op.MoveTabuParameter.ActualNameChanged += new EventHandler(TabuChecker_MoveTabuParameter_ActualNameChanged);
282      }
283      UpdateMoveGenerator();
284      UpdateMoveParameters();
285      UpdateAnalyzers();
286      ParameterizeMainLoop();
287      ParameterizeMoveGenerators();
288      ParameterizeMoveEvaluator();
289      ParameterizeMoveMaker();
290      ParameterizeTabuMaker();
291      ParameterizeTabuChecker();
292      ParameterizeAnalyzers();
293      ParameterizeIterationBasedOperators();
294      base.Problem_OperatorsChanged(sender, e);
295    }
296    private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
297      ParameterizeMainLoop();
298      ParameterizeMoveEvaluator();
299      ParameterizeMoveMaker();
300      ParameterizeTabuMaker();
301      ParameterizeTabuChecker();
302    }
303    private void MoveGeneratorParameter_ValueChanged(object sender, EventArgs e) {
304      UpdateMoveParameters();
305    }
306    private void MoveEvaluatorParameter_ValueChanged(object sender, EventArgs e) {
307      ParameterizeMainLoop();
308      ParameterizeMoveEvaluator();
309      ParameterizeMoveMaker();
310      ParameterizeTabuMaker();
311      ParameterizeTabuChecker();
312      ParameterizeAnalyzers();
313    }
314    private void MoveEvaluator_MoveQualityParameter_ActualNameChanged(object sender, EventArgs e) {
315      ParameterizeMainLoop();
316      ParameterizeMoveEvaluator();
317      ParameterizeMoveMaker();
318      ParameterizeTabuMaker();
319      ParameterizeTabuChecker();
320      ParameterizeAnalyzers();
321    }
322    private void TabuCheckerParameter_ValueChanged(object sender, EventArgs e) {
323      ParameterizeMainLoop();
324      ParameterizeAnalyzers();
325    }
326    private void TabuChecker_MoveTabuParameter_ActualNameChanged(object sender, EventArgs e) {
327      ParameterizeMainLoop();
328      ParameterizeAnalyzers();
329    }
330    private void SampleSizeParameter_NameChanged(object sender, EventArgs e) {
331      ParameterizeMoveGenerators();
332    }
333    #endregion
334
335    #region Helpers
336    private void Initialize() {
337      if (Problem != null) {
338        Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
339        foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
340          op.MoveQualityParameter.ActualNameChanged += new EventHandler(MoveEvaluator_MoveQualityParameter_ActualNameChanged);
341        }
342      }
343      MoveGeneratorParameter.ValueChanged += new EventHandler(MoveGeneratorParameter_ValueChanged);
344      MoveEvaluatorParameter.ValueChanged += new EventHandler(MoveEvaluatorParameter_ValueChanged);
345      TabuCheckerParameter.ValueChanged += new EventHandler(TabuCheckerParameter_ValueChanged);
346      SampleSizeParameter.NameChanged += new EventHandler(SampleSizeParameter_NameChanged);
347    }
348    private void UpdateMoveGenerator() {
349      IMoveGenerator oldMoveGenerator = MoveGenerator;
350      IMoveGenerator defaultMoveGenerator = Problem.Operators.OfType<IMoveGenerator>().FirstOrDefault();
351      MoveGeneratorParameter.ValidValues.Clear();
352      if (Problem != null) {
353        // only add move generators that also have a corresponding tabu-checker and tabu-maker
354        //
355        // 1. assumption: all tabu checkers and tabu makers also implement the IMoveOperator interface
356        // 2. assumption: all move generators also implement the IMoveOperator interface
357        // 3. assumption: if compatible all three operators implement the same (most specific) IMoveOperator interface
358        foreach (IMoveGenerator generator in Problem.Operators.OfType<IMoveGenerator>().OrderBy(x => x.Name)) {
359          // get all interfaces equal to or derived from IMoveOperator that this move generator implements
360          var moveTypes = generator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
361          // keep only the most specific interfaces (e.g. IPermutationTranslocationMoveOperator);
362          // by removing all interfaces for which a derived interface is also contained in the moveTypes set
363          foreach (var type in moveTypes.ToList()) {
364            if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t))) moveTypes.Remove(type);
365          }
366          // keep move generator only if there is a tabu checker and a tabu maker that is derived from
367          // one of the most specific interfaces in moveTypes (e.g. IPermutationTranslocationMoveOperator)
368          if (Problem.Operators.OfType<ITabuChecker>().Any(op => moveTypes.Any(m => m.IsInstanceOfType(op)))
369            && Problem.Operators.OfType<ITabuMaker>().Any(op => moveTypes.Any(m => m.IsInstanceOfType(op))))
370            MoveGeneratorParameter.ValidValues.Add(generator);
371        }
372      }
373      if (oldMoveGenerator != null && MoveGeneratorParameter.ValidValues.Any(x => x.GetType() == oldMoveGenerator.GetType()))
374        MoveGenerator = MoveGeneratorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveGenerator.GetType());
375      if (MoveGenerator == null && defaultMoveGenerator != null)
376        MoveGenerator = defaultMoveGenerator;
377
378      if (MoveGenerator == null) {
379        ClearMoveParameters();
380      }
381    }
382    private void UpdateMoveParameters() {
383      IMoveMaker oldMoveMaker = MoveMaker;
384      ISingleObjectiveMoveEvaluator oldMoveEvaluator = MoveEvaluator;
385      ITabuChecker oldTabuChecker = TabuChecker;
386      ITabuMaker oldTabuMoveMaker = TabuMaker;
387      ClearMoveParameters();
388      if (MoveGenerator != null) {
389        List<Type> moveTypes = MoveGenerator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
390        foreach (Type type in moveTypes.ToList()) {
391          if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t)))
392            moveTypes.Remove(type);
393        }
394
395        var operators = Problem.Operators.Where(op => moveTypes.Any(m => m.IsInstanceOfType(op))).ToList();
396        IMoveMaker defaultMoveMaker = operators.OfType<IMoveMaker>().FirstOrDefault();
397        ISingleObjectiveMoveEvaluator defaultMoveEvaluator = operators.OfType<ISingleObjectiveMoveEvaluator>().FirstOrDefault();
398        ITabuChecker defaultTabuChecker = operators.OfType<ITabuChecker>().FirstOrDefault();
399        ITabuMaker defaultTabuMaker = operators.OfType<ITabuMaker>().FirstOrDefault();
400
401        foreach (IMoveMaker moveMaker in operators.OfType<IMoveMaker>())
402          MoveMakerParameter.ValidValues.Add(moveMaker);
403        foreach (ISingleObjectiveMoveEvaluator moveEvaluator in operators.OfType<ISingleObjectiveMoveEvaluator>())
404          MoveEvaluatorParameter.ValidValues.Add(moveEvaluator);
405        foreach (ITabuChecker tabuMoveEvaluator in operators.OfType<ITabuChecker>())
406          TabuCheckerParameter.ValidValues.Add(tabuMoveEvaluator);
407        foreach (ITabuMaker tabuMoveMaker in operators.OfType<ITabuMaker>())
408          TabuMakerParameter.ValidValues.Add(tabuMoveMaker);
409
410        if (oldMoveMaker != null) {
411          IMoveMaker mm = MoveMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveMaker.GetType());
412          if (mm != null) MoveMaker = mm;
413          else oldMoveMaker = null;
414        }
415        if (oldMoveMaker == null && defaultMoveMaker != null)
416          MoveMaker = defaultMoveMaker;
417
418        if (oldMoveEvaluator != null) {
419          ISingleObjectiveMoveEvaluator me = MoveEvaluatorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveEvaluator.GetType());
420          if (me != null) MoveEvaluator = me;
421          else oldMoveEvaluator = null;
422        }
423        if (oldMoveEvaluator == null && defaultMoveEvaluator != null)
424          MoveEvaluator = defaultMoveEvaluator;
425
426        if (oldTabuMoveMaker != null) {
427          ITabuMaker tmm = TabuMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTabuMoveMaker.GetType());
428          if (tmm != null) TabuMaker = tmm;
429          else oldTabuMoveMaker = null;
430        }
431        if (oldTabuMoveMaker == null && defaultTabuMaker != null)
432          TabuMaker = defaultTabuMaker;
433
434        if (oldTabuChecker != null) {
435          ITabuChecker tme = TabuCheckerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTabuChecker.GetType());
436          if (tme != null) TabuChecker = tme;
437          else oldTabuChecker = null;
438        }
439        if (oldTabuChecker == null && defaultTabuChecker != null)
440          TabuChecker = defaultTabuChecker;
441      }
442    }
443    private void UpdateAnalyzers() {
444      Analyzer.Operators.Clear();
445      if (Problem != null) {
446        foreach (IAnalyzer analyzer in Problem.Operators.OfType<IAnalyzer>()) {
447          foreach (IScopeTreeLookupParameter param in analyzer.Parameters.OfType<IScopeTreeLookupParameter>())
448            param.Depth = 0;
449          Analyzer.Operators.Add(analyzer, analyzer.EnabledByDefault);
450        }
451      }
452      Analyzer.Operators.Add(moveQualityAnalyzer, moveQualityAnalyzer.EnabledByDefault);
453      Analyzer.Operators.Add(tabuNeighborhoodAnalyzer, tabuNeighborhoodAnalyzer.EnabledByDefault);
454    }
455    private void ClearMoveParameters() {
456      MoveMakerParameter.ValidValues.Clear();
457      MoveEvaluatorParameter.ValidValues.Clear();
458      TabuCheckerParameter.ValidValues.Clear();
459      TabuMakerParameter.ValidValues.Clear();
460    }
461    private void ParameterizeSolutionsCreator() {
462      SolutionsCreator.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
463      SolutionsCreator.SolutionCreatorParameter.ActualName = Problem.SolutionCreatorParameter.Name;
464    }
465    private void ParameterizeMainLoop() {
466      MainLoop.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
467      MainLoop.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
468      MainLoop.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
469      if (MoveEvaluator != null)
470        MainLoop.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
471      if (TabuChecker != null)
472        MainLoop.MoveTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
473    }
474    private void ParameterizeStochasticOperator(IOperator op) {
475      if (op is IStochasticOperator) {
476        IStochasticOperator stOp = (IStochasticOperator)op;
477        stOp.RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
478        stOp.RandomParameter.Hidden = true;
479      }
480    }
481    private void ParameterizeMoveGenerators() {
482      if (Problem != null) {
483        foreach (IMultiMoveGenerator generator in Problem.Operators.OfType<IMultiMoveGenerator>()) {
484          generator.SampleSizeParameter.ActualName = SampleSizeParameter.Name;
485          generator.SampleSizeParameter.Hidden = true;
486        }
487      }
488    }
489    private void ParameterizeMoveEvaluator() {
490      foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
491        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
492        op.QualityParameter.Hidden = true;
493      }
494    }
495    private void ParameterizeMoveMaker() {
496      foreach (IMoveMaker op in Problem.Operators.OfType<IMoveMaker>()) {
497        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
498        op.QualityParameter.Hidden = true;
499        if (MoveEvaluator != null) {
500          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
501          op.MoveQualityParameter.Hidden = true;
502        } else {
503          op.MoveQualityParameter.Hidden = false;
504        }
505      }
506    }
507    private void ParameterizeTabuMaker() {
508      foreach (ITabuMaker op in Problem.Operators.OfType<ITabuMaker>()) {
509        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
510        op.QualityParameter.Hidden = true;
511        if (MoveEvaluator != null) {
512          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
513          op.MoveQualityParameter.Hidden = true;
514        } else {
515          op.MoveQualityParameter.Hidden = false;
516        }
517      }
518    }
519    private void ParameterizeTabuChecker() {
520      foreach (ITabuChecker op in Problem.Operators.OfType<ITabuChecker>()) {
521        if (MoveEvaluator != null) {
522          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
523          op.MoveQualityParameter.Hidden = true;
524        } else {
525          op.MoveQualityParameter.Hidden = false;
526        }
527        if (TabuChecker != null) {
528          op.MoveTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
529          op.MoveTabuParameter.Hidden = true;
530        } else {
531          op.MoveTabuParameter.Hidden = false;
532        }
533      }
534    }
535    private void ParameterizeAnalyzers() {
536      moveQualityAnalyzer.ResultsParameter.ActualName = "Results";
537      moveQualityAnalyzer.ResultsParameter.Hidden = true;
538      tabuNeighborhoodAnalyzer.ResultsParameter.ActualName = "Results";
539      tabuNeighborhoodAnalyzer.ResultsParameter.Hidden = true;
540      tabuNeighborhoodAnalyzer.PercentTabuParameter.ActualName = "PercentTabu";
541      tabuNeighborhoodAnalyzer.PercentTabuParameter.Hidden = true;
542      if (Problem != null) {
543        moveQualityAnalyzer.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
544        moveQualityAnalyzer.MaximizationParameter.Hidden = true;
545        if (MoveEvaluator != null) {
546          moveQualityAnalyzer.QualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
547          moveQualityAnalyzer.QualityParameter.Hidden = true;
548        } else {
549          moveQualityAnalyzer.QualityParameter.Hidden = false;
550        }
551        moveQualityAnalyzer.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
552        moveQualityAnalyzer.BestKnownQualityParameter.Hidden = true;
553        if (TabuChecker != null) {
554          tabuNeighborhoodAnalyzer.IsTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
555          tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = true;
556        } else {
557          tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = false;
558        }
559      } else {
560        moveQualityAnalyzer.MaximizationParameter.Hidden = false;
561        moveQualityAnalyzer.QualityParameter.Hidden = false;
562        moveQualityAnalyzer.BestKnownQualityParameter.Hidden = false;
563        tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = false;
564      }
565    }
566    private void ParameterizeIterationBasedOperators() {
567      if (Problem != null) {
568        foreach (IIterationBasedOperator op in Problem.Operators.OfType<IIterationBasedOperator>()) {
569          op.IterationsParameter.ActualName = "Iterations";
570          op.IterationsParameter.Hidden = true;
571          op.MaximumIterationsParameter.ActualName = MaximumIterationsParameter.Name;
572          op.MaximumIterationsParameter.Hidden = true;
573        }
574      }
575    }
576    private TabuSearchMainLoop FindMainLoop(IOperator start) {
577      IOperator mainLoop = start;
578      while (mainLoop != null && !(mainLoop is TabuSearchMainLoop))
579        mainLoop = ((SingleSuccessorOperator)mainLoop).Successor;
580      if (mainLoop == null) return null;
581      else return (TabuSearchMainLoop)mainLoop;
582    }
583    #endregion
584  }
585}
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