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source: stable/HeuristicLab.Algorithms.TabuSearch/3.3/TabuSearch.cs @ 11788

Last change on this file since 11788 was 11170, checked in by ascheibe, 10 years ago

#2115 updated copyright year in stable branch
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2014 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        foreach (IMoveGenerator generator in Problem.Operators.OfType<IMoveGenerator>().OrderBy(x => x.Name)) {
355          // get all interfaces equal to or derived from IMoveOperator that this move generator implements
356          var moveTypes = generator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
357          // keep only the most specific interfaces (e.g. IPermutationTranslocationMoveOperator);
358          // by removing all interfaces for which a derived interface is also contained in the moveTypes set
359          foreach (var type in moveTypes.ToList()) {
360            if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t))) moveTypes.Remove(type);
361          }
362          // keep move generator only if there is a tabu checker and a tabu maker that is derived from the same move interface
363          if (Problem.Operators.OfType<ITabuChecker>().Any(op => moveTypes.Any(m => m.IsInstanceOfType(op)))
364            && Problem.Operators.OfType<ITabuMaker>().Any(op => moveTypes.Any(m => m.IsInstanceOfType(op))))
365            MoveGeneratorParameter.ValidValues.Add(generator);
366        }
367      }
368      if (oldMoveGenerator != null && MoveGeneratorParameter.ValidValues.Any(x => x.GetType() == oldMoveGenerator.GetType()))
369        MoveGenerator = MoveGeneratorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveGenerator.GetType());
370      if (MoveGenerator == null && defaultMoveGenerator != null)
371        MoveGenerator = defaultMoveGenerator;
372
373      if (MoveGenerator == null) {
374        ClearMoveParameters();
375      }
376    }
377    private void UpdateMoveParameters() {
378      IMoveMaker oldMoveMaker = MoveMaker;
379      ISingleObjectiveMoveEvaluator oldMoveEvaluator = MoveEvaluator;
380      ITabuChecker oldTabuChecker = TabuChecker;
381      ITabuMaker oldTabuMoveMaker = TabuMaker;
382      ClearMoveParameters();
383      if (MoveGenerator != null) {
384        List<Type> moveTypes = MoveGenerator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
385        foreach (Type type in moveTypes.ToList()) {
386          if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t)))
387            moveTypes.Remove(type);
388        }
389
390        var operators = Problem.Operators.Where(op => moveTypes.Any(m => m.IsInstanceOfType(op))).ToList();
391        IMoveMaker defaultMoveMaker = operators.OfType<IMoveMaker>().FirstOrDefault();
392        ISingleObjectiveMoveEvaluator defaultMoveEvaluator = operators.OfType<ISingleObjectiveMoveEvaluator>().FirstOrDefault();
393        ITabuChecker defaultTabuChecker = operators.OfType<ITabuChecker>().FirstOrDefault();
394        ITabuMaker defaultTabuMaker = operators.OfType<ITabuMaker>().FirstOrDefault();
395
396        foreach (IMoveMaker moveMaker in operators.OfType<IMoveMaker>())
397          MoveMakerParameter.ValidValues.Add(moveMaker);
398        foreach (ISingleObjectiveMoveEvaluator moveEvaluator in operators.OfType<ISingleObjectiveMoveEvaluator>())
399          MoveEvaluatorParameter.ValidValues.Add(moveEvaluator);
400        foreach (ITabuChecker tabuMoveEvaluator in operators.OfType<ITabuChecker>())
401          TabuCheckerParameter.ValidValues.Add(tabuMoveEvaluator);
402        foreach (ITabuMaker tabuMoveMaker in operators.OfType<ITabuMaker>())
403          TabuMakerParameter.ValidValues.Add(tabuMoveMaker);
404
405        if (oldMoveMaker != null) {
406          IMoveMaker mm = MoveMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveMaker.GetType());
407          if (mm != null) MoveMaker = mm;
408          else oldMoveMaker = null;
409        }
410        if (oldMoveMaker == null && defaultMoveMaker != null)
411          MoveMaker = defaultMoveMaker;
412
413        if (oldMoveEvaluator != null) {
414          ISingleObjectiveMoveEvaluator me = MoveEvaluatorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveEvaluator.GetType());
415          if (me != null) MoveEvaluator = me;
416          else oldMoveEvaluator = null;
417        }
418        if (oldMoveEvaluator == null && defaultMoveEvaluator != null)
419          MoveEvaluator = defaultMoveEvaluator;
420
421        if (oldTabuMoveMaker != null) {
422          ITabuMaker tmm = TabuMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTabuMoveMaker.GetType());
423          if (tmm != null) TabuMaker = tmm;
424          else oldTabuMoveMaker = null;
425        }
426        if (oldTabuMoveMaker == null && defaultTabuMaker != null)
427          TabuMaker = defaultTabuMaker;
428
429        if (oldTabuChecker != null) {
430          ITabuChecker tme = TabuCheckerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldTabuChecker.GetType());
431          if (tme != null) TabuChecker = tme;
432          else oldTabuChecker = null;
433        }
434        if (oldTabuChecker == null && defaultTabuChecker != null)
435          TabuChecker = defaultTabuChecker;
436      }
437    }
438    private void UpdateAnalyzers() {
439      Analyzer.Operators.Clear();
440      if (Problem != null) {
441        foreach (IAnalyzer analyzer in Problem.Operators.OfType<IAnalyzer>()) {
442          foreach (IScopeTreeLookupParameter param in analyzer.Parameters.OfType<IScopeTreeLookupParameter>())
443            param.Depth = 0;
444          Analyzer.Operators.Add(analyzer, analyzer.EnabledByDefault);
445        }
446      }
447      Analyzer.Operators.Add(moveQualityAnalyzer, moveQualityAnalyzer.EnabledByDefault);
448      Analyzer.Operators.Add(tabuNeighborhoodAnalyzer, tabuNeighborhoodAnalyzer.EnabledByDefault);
449    }
450    private void ClearMoveParameters() {
451      MoveMakerParameter.ValidValues.Clear();
452      MoveEvaluatorParameter.ValidValues.Clear();
453      TabuCheckerParameter.ValidValues.Clear();
454      TabuMakerParameter.ValidValues.Clear();
455    }
456    private void ParameterizeSolutionsCreator() {
457      SolutionsCreator.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
458      SolutionsCreator.SolutionCreatorParameter.ActualName = Problem.SolutionCreatorParameter.Name;
459    }
460    private void ParameterizeMainLoop() {
461      MainLoop.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
462      MainLoop.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
463      MainLoop.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
464      if (MoveEvaluator != null)
465        MainLoop.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
466      if (TabuChecker != null)
467        MainLoop.MoveTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
468    }
469    private void ParameterizeStochasticOperator(IOperator op) {
470      if (op is IStochasticOperator) {
471        IStochasticOperator stOp = (IStochasticOperator)op;
472        stOp.RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
473        stOp.RandomParameter.Hidden = true;
474      }
475    }
476    private void ParameterizeMoveGenerators() {
477      if (Problem != null) {
478        foreach (IMultiMoveGenerator generator in Problem.Operators.OfType<IMultiMoveGenerator>()) {
479          generator.SampleSizeParameter.ActualName = SampleSizeParameter.Name;
480          generator.SampleSizeParameter.Hidden = true;
481        }
482      }
483    }
484    private void ParameterizeMoveEvaluator() {
485      foreach (ISingleObjectiveMoveEvaluator op in Problem.Operators.OfType<ISingleObjectiveMoveEvaluator>()) {
486        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
487        op.QualityParameter.Hidden = true;
488      }
489    }
490    private void ParameterizeMoveMaker() {
491      foreach (IMoveMaker op in Problem.Operators.OfType<IMoveMaker>()) {
492        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
493        op.QualityParameter.Hidden = true;
494        if (MoveEvaluator != null) {
495          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
496          op.MoveQualityParameter.Hidden = true;
497        } else {
498          op.MoveQualityParameter.Hidden = false;
499        }
500      }
501    }
502    private void ParameterizeTabuMaker() {
503      foreach (ITabuMaker op in Problem.Operators.OfType<ITabuMaker>()) {
504        op.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
505        op.QualityParameter.Hidden = true;
506        if (MoveEvaluator != null) {
507          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
508          op.MoveQualityParameter.Hidden = true;
509        } else {
510          op.MoveQualityParameter.Hidden = false;
511        }
512      }
513    }
514    private void ParameterizeTabuChecker() {
515      foreach (ITabuChecker op in Problem.Operators.OfType<ITabuChecker>()) {
516        if (MoveEvaluator != null) {
517          op.MoveQualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
518          op.MoveQualityParameter.Hidden = true;
519        } else {
520          op.MoveQualityParameter.Hidden = false;
521        }
522        if (TabuChecker != null) {
523          op.MoveTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
524          op.MoveTabuParameter.Hidden = true;
525        } else {
526          op.MoveTabuParameter.Hidden = false;
527        }
528      }
529    }
530    private void ParameterizeAnalyzers() {
531      moveQualityAnalyzer.ResultsParameter.ActualName = "Results";
532      moveQualityAnalyzer.ResultsParameter.Hidden = true;
533      tabuNeighborhoodAnalyzer.ResultsParameter.ActualName = "Results";
534      tabuNeighborhoodAnalyzer.ResultsParameter.Hidden = true;
535      tabuNeighborhoodAnalyzer.PercentTabuParameter.ActualName = "PercentTabu";
536      tabuNeighborhoodAnalyzer.PercentTabuParameter.Hidden = true;
537      if (Problem != null) {
538        moveQualityAnalyzer.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
539        moveQualityAnalyzer.MaximizationParameter.Hidden = true;
540        if (MoveEvaluator != null) {
541          moveQualityAnalyzer.QualityParameter.ActualName = MoveEvaluator.MoveQualityParameter.ActualName;
542          moveQualityAnalyzer.QualityParameter.Hidden = true;
543        } else {
544          moveQualityAnalyzer.QualityParameter.Hidden = false;
545        }
546        moveQualityAnalyzer.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
547        moveQualityAnalyzer.BestKnownQualityParameter.Hidden = true;
548        if (TabuChecker != null) {
549          tabuNeighborhoodAnalyzer.IsTabuParameter.ActualName = TabuChecker.MoveTabuParameter.ActualName;
550          tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = true;
551        } else {
552          tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = false;
553        }
554      } else {
555        moveQualityAnalyzer.MaximizationParameter.Hidden = false;
556        moveQualityAnalyzer.QualityParameter.Hidden = false;
557        moveQualityAnalyzer.BestKnownQualityParameter.Hidden = false;
558        tabuNeighborhoodAnalyzer.IsTabuParameter.Hidden = false;
559      }
560    }
561    private void ParameterizeIterationBasedOperators() {
562      if (Problem != null) {
563        foreach (IIterationBasedOperator op in Problem.Operators.OfType<IIterationBasedOperator>()) {
564          op.IterationsParameter.ActualName = "Iterations";
565          op.IterationsParameter.Hidden = true;
566          op.MaximumIterationsParameter.ActualName = MaximumIterationsParameter.Name;
567          op.MaximumIterationsParameter.Hidden = true;
568        }
569      }
570    }
571    private TabuSearchMainLoop FindMainLoop(IOperator start) {
572      IOperator mainLoop = start;
573      while (mainLoop != null && !(mainLoop is TabuSearchMainLoop))
574        mainLoop = ((SingleSuccessorOperator)mainLoop).Successor;
575      if (mainLoop == null) return null;
576      else return (TabuSearchMainLoop)mainLoop;
577    }
578    #endregion
579  }
580}
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