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source: trunk/sources/HeuristicLab.Algorithms.TabuSearch/3.3/TabuSearchMainLoop.cs @ 3376

Last change on this file since 3376 was 3376, checked in by swagner, 14 years ago

Moved interfaces and classes for deep cloning from HeuristicLab.Core to HeuristicLab.Common (#975).

File size: 17.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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 HeuristicLab.Analysis;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Data;
26using HeuristicLab.Operators;
27using HeuristicLab.Optimization.Operators;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30using HeuristicLab.Selection;
31
32namespace HeuristicLab.Algorithms.TabuSearch {
33  /// <summary>
34  /// An operator which represents a tabu search.
35  /// </summary>
36  [Item("TabuSearchMainLoop", "An operator which represents the main loop of a tabu search.")]
37  [StorableClass]
38  public sealed class TabuSearchMainLoop : AlgorithmOperator {
39    #region Parameter properties
40    public ValueLookupParameter<IRandom> RandomParameter {
41      get { return (ValueLookupParameter<IRandom>)Parameters["Random"]; }
42    }
43    public ValueLookupParameter<BoolValue> MaximizationParameter {
44      get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
45    }
46    public LookupParameter<DoubleValue> QualityParameter {
47      get { return (LookupParameter<DoubleValue>)Parameters["Quality"]; }
48    }
49    public ValueLookupParameter<DoubleValue> BestKnownQualityParameter {
50      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
51    }
52    public LookupParameter<DoubleValue> MoveQualityParameter {
53      get { return (LookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
54    }
55    public LookupParameter<BoolValue> MoveTabuParameter {
56      get { return (LookupParameter<BoolValue>)Parameters["MoveTabu"]; }
57    }
58    public ValueLookupParameter<IntValue> MaximumIterationsParameter {
59      get { return (ValueLookupParameter<IntValue>)Parameters["MaximumIterations"]; }
60    }
61    public ValueLookupParameter<IntValue> TabuTenureParameter {
62      get { return (ValueLookupParameter<IntValue>)Parameters["TabuTenure"]; }
63    }
64    public ValueLookupParameter<IOperator> MoveGeneratorParameter {
65      get { return (ValueLookupParameter<IOperator>)Parameters["MoveGenerator"]; }
66    }
67    public ValueLookupParameter<IOperator> MoveEvaluatorParameter {
68      get { return (ValueLookupParameter<IOperator>)Parameters["MoveEvaluator"]; }
69    }
70    public ValueLookupParameter<IOperator> MoveMakerParameter {
71      get { return (ValueLookupParameter<IOperator>)Parameters["MoveMaker"]; }
72    }
73    public ValueLookupParameter<IOperator> TabuCheckerParameter {
74      get { return (ValueLookupParameter<IOperator>)Parameters["TabuChecker"]; }
75    }
76    public ValueLookupParameter<IOperator> TabuMakerParameter {
77      get { return (ValueLookupParameter<IOperator>)Parameters["TabuMaker"]; }
78    }
79    public ValueLookupParameter<IOperator> VisualizerParameter {
80      get { return (ValueLookupParameter<IOperator>)Parameters["Visualizer"]; }
81    }
82    public LookupParameter<IItem> VisualizationParameter {
83      get { return (LookupParameter<IItem>)Parameters["Visualization"]; }
84    }
85    public ValueLookupParameter<VariableCollection> ResultsParameter {
86      get { return (ValueLookupParameter<VariableCollection>)Parameters["Results"]; }
87    }
88    #endregion
89
90    [StorableConstructor]
91    private TabuSearchMainLoop(bool deserializing) : base() { }
92    public TabuSearchMainLoop()
93      : base() {
94      Initialize();
95    }
96
97    private void Initialize() {
98      #region Create parameters
99      Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
100      Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false."));
101      Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
102      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestKnownQuality", "The best known quality value found so far."));
103      Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The value which represents the quality of a move."));
104      Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The value that indicates if a move is tabu or not."));
105      Parameters.Add(new ValueLookupParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed."));
106      Parameters.Add(new ValueLookupParameter<IntValue>("TabuTenure", "The length of the tabu list, and also means the number of iterations a move is kept tabu"));
107
108      Parameters.Add(new ValueLookupParameter<IOperator>("MoveGenerator", "The operator that generates the moves."));
109      Parameters.Add(new ValueLookupParameter<IOperator>("MoveMaker", "The operator that performs a move and updates the quality."));
110      Parameters.Add(new ValueLookupParameter<IOperator>("MoveEvaluator", "The operator that evaluates a move."));
111      Parameters.Add(new ValueLookupParameter<IOperator>("TabuChecker", "The operator that checks whether a move is tabu."));
112      Parameters.Add(new ValueLookupParameter<IOperator>("TabuMaker", "The operator that declares a move tabu."));
113
114      Parameters.Add(new ValueLookupParameter<IOperator>("Visualizer", "The operator used to visualize solutions."));
115      Parameters.Add(new LookupParameter<IItem>("Visualization", "The item which represents the visualization of solutions."));
116      Parameters.Add(new ValueLookupParameter<VariableCollection>("Results", "The variable collection where results should be stored."));
117      #endregion
118
119      #region Create operators
120      TabuListCreator tabuListCreator = new TabuListCreator();
121      VariableCreator variableCreator = new VariableCreator();
122      BestQualityMemorizer bestQualityMemorizer1 = new BestQualityMemorizer();
123      BestQualityMemorizer bestQualityMemorizer2 = new BestQualityMemorizer();
124      QualityDifferenceCalculator qualityDifferenceCalculator1 = new QualityDifferenceCalculator();
125      Placeholder visualizer1 = new Placeholder();
126      ResultsCollector resultsCollector = new ResultsCollector();
127      UniformSubScopesProcessor mainProcessor = new UniformSubScopesProcessor();
128      Placeholder moveGenerator = new Placeholder();
129      UniformSubScopesProcessor moveEvaluationProcessor = new UniformSubScopesProcessor();
130      Placeholder moveEvaluator = new Placeholder();
131      Placeholder tabuChecker = new Placeholder();
132      SubScopesSorter moveQualitySorter = new SubScopesSorter();
133      BestAverageWorstQualityCalculator bestAverageWorstMoveQualityCalculator = new BestAverageWorstQualityCalculator();
134      TabuSelector tabuSelector = new TabuSelector();
135      ConditionalBranch emptyNeighborhoodBranch1 = new ConditionalBranch();
136      RightReducer rightReducer = new RightReducer();
137      UniformSubScopesProcessor moveMakingProcessor = new UniformSubScopesProcessor();
138      Placeholder tabuMaker = new Placeholder();
139      Placeholder moveMaker = new Placeholder();
140      DataTableValuesCollector valuesCollector = new DataTableValuesCollector();
141      SubScopesRemover subScopesRemover1 = new SubScopesRemover();
142      ConditionalBranch emptyNeighborhoodBranch2 = new ConditionalBranch();
143      UniformSubScopesProcessor removeMoves = new UniformSubScopesProcessor();
144      SubScopesRemover subScopesRemover2 = new SubScopesRemover();
145      IntCounter iterationsCounter = new IntCounter();
146      Comparator iterationsComparator = new Comparator();
147      BestQualityMemorizer bestQualityMemorizer3 = new BestQualityMemorizer();
148      BestQualityMemorizer bestQualityMemorizer4 = new BestQualityMemorizer();
149      QualityDifferenceCalculator qualityDifferenceCalculator2 = new QualityDifferenceCalculator();
150      Placeholder visualizer2 = new Placeholder();
151      ConditionalBranch iterationsTermination = new ConditionalBranch();
152
153      variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Iterations", new IntValue(0)));
154      variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Best Move Quality", new DoubleValue(0)));
155      variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Average Move Quality", new DoubleValue(0)));
156      variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Worst Move Quality", new DoubleValue(0)));
157      variableCreator.CollectedValues.Add(new ValueParameter<DataTable>("MoveQualities", new DataTable("MoveQualities")));
158      variableCreator.CollectedValues.Add(new ValueParameter<BoolValue>("EmptyNeighborhood", new BoolValue(false)));
159
160      bestQualityMemorizer1.BestQualityParameter.ActualName = "BestQuality";
161      bestQualityMemorizer1.MaximizationParameter.ActualName = MaximizationParameter.Name;
162      bestQualityMemorizer1.QualityParameter.ActualName = QualityParameter.Name;
163
164      bestQualityMemorizer2.BestQualityParameter.ActualName = BestKnownQualityParameter.Name;
165      bestQualityMemorizer2.MaximizationParameter.ActualName = MaximizationParameter.Name;
166      bestQualityMemorizer2.QualityParameter.ActualName = QualityParameter.Name;
167
168      qualityDifferenceCalculator1.AbsoluteDifferenceParameter.ActualName = "AbsoluteDifferenceBestKnownToBest";
169      qualityDifferenceCalculator1.FirstQualityParameter.ActualName = BestKnownQualityParameter.Name;
170      qualityDifferenceCalculator1.RelativeDifferenceParameter.ActualName = "RelativeDifferenceBestKnownToBest";
171      qualityDifferenceCalculator1.SecondQualityParameter.ActualName = "BestQuality";
172
173      visualizer1.Name = "Visualizer (placeholder)";
174      visualizer1.OperatorParameter.ActualName = VisualizerParameter.Name;
175
176      resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
177      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Quality", null, "BestQuality"));
178      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
179      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
180      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
181      resultsCollector.CollectedValues.Add(new LookupParameter<DataTable>("MoveQualities"));
182      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Known Quality", null, BestKnownQualityParameter.Name));
183      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Absolute Difference of Best Known Quality to Best Quality", null, "AbsoluteDifferenceBestKnownToBest"));
184      resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Relative Difference of Best Known Quality to Best Quality", null, "RelativeDifferenceBestKnownToBest"));
185      resultsCollector.CollectedValues.Add(new LookupParameter<IItem>("Solution Visualization", null, VisualizationParameter.Name));
186      resultsCollector.ResultsParameter.ActualName = "Results";
187
188      mainProcessor.Name = "Solution processor (UniformSubScopesProcessor)";
189
190      moveGenerator.Name = "MoveGenerator (placeholder)";
191      moveGenerator.OperatorParameter.ActualName = MoveGeneratorParameter.Name;
192
193      moveEvaluator.Name = "MoveEvaluator (placeholder)";
194      moveEvaluator.OperatorParameter.ActualName = MoveEvaluatorParameter.Name;
195
196      tabuChecker.Name = "TabuChecker (placeholder)";
197      tabuChecker.OperatorParameter.ActualName = TabuCheckerParameter.Name;
198
199      moveQualitySorter.DescendingParameter.ActualName = MaximizationParameter.Name;
200      moveQualitySorter.ValueParameter.ActualName = MoveQualityParameter.Name;
201
202      bestAverageWorstMoveQualityCalculator.AverageQualityParameter.ActualName = "Average Move Quality";
203      bestAverageWorstMoveQualityCalculator.BestQualityParameter.ActualName = "Best Move Quality";
204      bestAverageWorstMoveQualityCalculator.MaximizationParameter.ActualName = "Maximization";
205      bestAverageWorstMoveQualityCalculator.QualityParameter.ActualName = MoveQualityParameter.Name;
206      bestAverageWorstMoveQualityCalculator.WorstQualityParameter.ActualName = "Worst Move Quality";
207
208      valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
209      valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
210      valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
211      valuesCollector.DataTableParameter.ActualName = "MoveQualities";
212
213      moveMakingProcessor.Name = "MoveMaking processor (UniformSubScopesProcessor)";
214
215      emptyNeighborhoodBranch1.Name = "Neighborhood empty?";
216      emptyNeighborhoodBranch1.ConditionParameter.ActualName = "EmptyNeighborhood";
217
218      tabuMaker.Name = "TabuMaker (placeholder)";
219      tabuMaker.OperatorParameter.ActualName = TabuMakerParameter.Name;
220
221      moveMaker.Name = "MoveMaker (placeholder)";
222      moveMaker.OperatorParameter.ActualName = MoveMakerParameter.Name;
223
224      subScopesRemover1.RemoveAllSubScopes = true;
225
226      emptyNeighborhoodBranch2.Name = "Neighborhood empty?";
227      emptyNeighborhoodBranch2.ConditionParameter.ActualName = "EmptyNeighborhood";
228
229      subScopesRemover2.RemoveAllSubScopes = true;
230
231      iterationsCounter.Name = "Iterations Counter";
232      iterationsCounter.Increment = new IntValue(1);
233      iterationsCounter.ValueParameter.ActualName = "Iterations";
234
235      iterationsComparator.Name = "Iterations >= MaximumIterations";
236      iterationsComparator.Comparison = new Comparison(ComparisonType.GreaterOrEqual);
237      iterationsComparator.LeftSideParameter.ActualName = "Iterations";
238      iterationsComparator.RightSideParameter.ActualName = MaximumIterationsParameter.Name;
239      iterationsComparator.ResultParameter.ActualName = "Terminate";
240
241      bestQualityMemorizer3.BestQualityParameter.ActualName = "BestQuality";
242      bestQualityMemorizer3.MaximizationParameter.ActualName = MaximizationParameter.Name;
243      bestQualityMemorizer3.QualityParameter.ActualName = QualityParameter.Name;
244
245      bestQualityMemorizer4.BestQualityParameter.ActualName = BestKnownQualityParameter.Name;
246      bestQualityMemorizer4.MaximizationParameter.ActualName = MaximizationParameter.Name;
247      bestQualityMemorizer4.QualityParameter.ActualName = QualityParameter.Name;
248
249      qualityDifferenceCalculator2.AbsoluteDifferenceParameter.ActualName = "AbsoluteDifferenceBestKnownToBest";
250      qualityDifferenceCalculator2.FirstQualityParameter.ActualName = BestKnownQualityParameter.Name;
251      qualityDifferenceCalculator2.RelativeDifferenceParameter.ActualName = "RelativeDifferenceBestKnownToBest";
252      qualityDifferenceCalculator2.SecondQualityParameter.ActualName = "BestQuality";
253
254      visualizer2.Name = "Visualizer (placeholder)";
255      visualizer2.OperatorParameter.ActualName = VisualizerParameter.Name;
256
257      iterationsTermination.Name = "Iterations Termination Condition";
258      iterationsTermination.ConditionParameter.ActualName = "Terminate";
259      #endregion
260
261      #region Create operator graph
262      OperatorGraph.InitialOperator = tabuListCreator;
263      tabuListCreator.Successor = variableCreator;
264      variableCreator.Successor = bestQualityMemorizer1;
265      bestQualityMemorizer1.Successor = bestQualityMemorizer2;
266      bestQualityMemorizer2.Successor = qualityDifferenceCalculator1;
267      qualityDifferenceCalculator1.Successor = visualizer1;
268      visualizer1.Successor = resultsCollector;
269      resultsCollector.Successor = mainProcessor;
270      mainProcessor.Operator = moveGenerator;
271      mainProcessor.Successor = emptyNeighborhoodBranch2;
272      moveGenerator.Successor = moveEvaluationProcessor;
273      moveEvaluationProcessor.Operator = moveEvaluator;
274      moveEvaluationProcessor.Successor = moveQualitySorter;
275      moveEvaluator.Successor = tabuChecker;
276      tabuChecker.Successor = null;
277      moveQualitySorter.Successor = bestAverageWorstMoveQualityCalculator;
278      bestAverageWorstMoveQualityCalculator.Successor = valuesCollector;
279      valuesCollector.Successor = tabuSelector;
280      tabuSelector.Successor = emptyNeighborhoodBranch1;
281      emptyNeighborhoodBranch1.FalseBranch = rightReducer;
282      emptyNeighborhoodBranch1.TrueBranch = null;
283      emptyNeighborhoodBranch1.Successor = null;
284      rightReducer.Successor = moveMakingProcessor;
285      moveMakingProcessor.Operator = tabuMaker;
286      moveMakingProcessor.Successor = subScopesRemover1;
287      tabuMaker.Successor = moveMaker;
288      moveMaker.Successor = null;
289      subScopesRemover1.Successor = null;
290      emptyNeighborhoodBranch2.FalseBranch = iterationsCounter;
291      emptyNeighborhoodBranch2.TrueBranch = removeMoves;
292      emptyNeighborhoodBranch2.Successor = null;
293      removeMoves.Operator = subScopesRemover2;
294      removeMoves.Successor = null;
295      subScopesRemover2.Successor = null;
296      iterationsCounter.Successor = iterationsComparator;
297      iterationsComparator.Successor = bestQualityMemorizer3;
298      bestQualityMemorizer3.Successor = bestQualityMemorizer4;
299      bestQualityMemorizer4.Successor = qualityDifferenceCalculator2;
300      qualityDifferenceCalculator2.Successor = visualizer2;
301      visualizer2.Successor = iterationsTermination;
302      iterationsTermination.TrueBranch = null;
303      iterationsTermination.FalseBranch = mainProcessor;
304      #endregion
305    }
306  }
307}
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