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source: trunk/sources/HeuristicLab.Problems.TestFunctions/3.3/SingleObjectiveTestFunctionProblem.cs @ 4695

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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 System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Encodings.RealVectorEncoding;
30using HeuristicLab.Optimization;
31using HeuristicLab.Parameters;
32using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
33using HeuristicLab.PluginInfrastructure;
34
35namespace HeuristicLab.Problems.TestFunctions {
36  [Item("Single Objective Test Function", "Test function with real valued inputs and a single objective.")]
37  [StorableClass]
38  [Creatable("Problems")]
39  public sealed class SingleObjectiveTestFunctionProblem : ParameterizedNamedItem, ISingleObjectiveProblem, IStorableContent {
40    public string Filename { get; set; }
41
42    [Storable]
43    private StdDevStrategyVectorCreator strategyVectorCreator;
44    [Storable]
45    private StdDevStrategyVectorCrossover strategyVectorCrossover;
46    [Storable]
47    private StdDevStrategyVectorManipulator strategyVectorManipulator;
48
49    public override Image ItemImage {
50      get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
51    }
52
53    #region Parameter Properties
54    public ValueParameter<BoolValue> MaximizationParameter {
55      get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
56    }
57    IParameter ISingleObjectiveProblem.MaximizationParameter {
58      get { return MaximizationParameter; }
59    }
60    public ValueParameter<DoubleMatrix> BoundsParameter {
61      get { return (ValueParameter<DoubleMatrix>)Parameters["Bounds"]; }
62    }
63    public ValueParameter<IntValue> ProblemSizeParameter {
64      get { return (ValueParameter<IntValue>)Parameters["ProblemSize"]; }
65    }
66    public ValueParameter<IRealVectorCreator> SolutionCreatorParameter {
67      get { return (ValueParameter<IRealVectorCreator>)Parameters["SolutionCreator"]; }
68    }
69    IParameter IProblem.SolutionCreatorParameter {
70      get { return SolutionCreatorParameter; }
71    }
72    public ValueParameter<ISingleObjectiveTestFunctionProblemEvaluator> EvaluatorParameter {
73      get { return (ValueParameter<ISingleObjectiveTestFunctionProblemEvaluator>)Parameters["Evaluator"]; }
74    }
75    IParameter IProblem.EvaluatorParameter {
76      get { return EvaluatorParameter; }
77    }
78    public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
79      get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
80    }
81    IParameter ISingleObjectiveProblem.BestKnownQualityParameter {
82      get { return BestKnownQualityParameter; }
83    }
84    public OptionalValueParameter<RealVector> BestKnownSolutionParameter {
85      get { return (OptionalValueParameter<RealVector>)Parameters["BestKnownSolution"]; }
86    }
87    #endregion
88
89    #region Properties
90    public BoolValue Maximization {
91      get { return MaximizationParameter.Value; }
92      set { MaximizationParameter.Value = value; }
93    }
94    public DoubleMatrix Bounds {
95      get { return BoundsParameter.Value; }
96      set { BoundsParameter.Value = value; }
97    }
98    public IntValue ProblemSize {
99      get { return ProblemSizeParameter.Value; }
100      set { ProblemSizeParameter.Value = value; }
101    }
102    public IRealVectorCreator SolutionCreator {
103      get { return SolutionCreatorParameter.Value; }
104      set { SolutionCreatorParameter.Value = value; }
105    }
106    ISolutionCreator IProblem.SolutionCreator {
107      get { return SolutionCreatorParameter.Value; }
108    }
109    public ISingleObjectiveTestFunctionProblemEvaluator Evaluator {
110      get { return EvaluatorParameter.Value; }
111      set { EvaluatorParameter.Value = value; }
112    }
113    ISingleObjectiveEvaluator ISingleObjectiveProblem.Evaluator {
114      get { return EvaluatorParameter.Value; }
115    }
116    IEvaluator IProblem.Evaluator {
117      get { return EvaluatorParameter.Value; }
118    }
119    public DoubleValue BestKnownQuality {
120      get { return BestKnownQualityParameter.Value; }
121      set { BestKnownQualityParameter.Value = value; }
122    }
123    public IEnumerable<IOperator> Operators {
124      get { return operators; }
125    }
126    private BestSingleObjectiveTestFunctionSolutionAnalyzer BestSingleObjectiveTestFunctionSolutionAnalyzer {
127      get { return operators.OfType<BestSingleObjectiveTestFunctionSolutionAnalyzer>().FirstOrDefault(); }
128    }
129    #endregion
130
131    [Storable]
132    private List<IOperator> operators;
133
134    [StorableConstructor]
135    private SingleObjectiveTestFunctionProblem(bool deserializing) : base(deserializing) { }
136    public SingleObjectiveTestFunctionProblem()
137      : base() {
138      UniformRandomRealVectorCreator creator = new UniformRandomRealVectorCreator();
139      AckleyEvaluator evaluator = new AckleyEvaluator();
140
141      Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as most test functions are minimization problems.", new BoolValue(evaluator.Maximization)));
142      Parameters.Add(new ValueParameter<DoubleMatrix>("Bounds", "The lower and upper bounds in each dimension.", evaluator.Bounds));
143      Parameters.Add(new ValueParameter<IntValue>("ProblemSize", "The dimension of the problem.", new IntValue(2)));
144      Parameters.Add(new ValueParameter<IRealVectorCreator>("SolutionCreator", "The operator which should be used to create new test function solutions.", creator));
145      Parameters.Add(new ValueParameter<ISingleObjectiveTestFunctionProblemEvaluator>("Evaluator", "The operator which should be used to evaluate test function solutions.", evaluator));
146      Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this test function.", new DoubleValue(evaluator.BestKnownQuality)));
147      Parameters.Add(new OptionalValueParameter<RealVector>("BestKnownSolution", "The best known solution for this test function instance."));
148
149      strategyVectorCreator = new StdDevStrategyVectorCreator();
150      strategyVectorCreator.LengthParameter.ActualName = ProblemSizeParameter.Name;
151      strategyVectorCrossover = new StdDevStrategyVectorCrossover();
152      strategyVectorManipulator = new StdDevStrategyVectorManipulator();
153      strategyVectorManipulator.LearningRateParameter.Value = new DoubleValue(0.5);
154      strategyVectorManipulator.GeneralLearningRateParameter.Value = new DoubleValue(0.5);
155
156      creator.RealVectorParameter.ActualName = "Point";
157      ParameterizeSolutionCreator();
158      ParameterizeEvaluator();
159
160      InitializeOperators();
161      AttachEventHandlers();
162      UpdateStrategyVectorBounds();
163    }
164
165    public override IDeepCloneable Clone(Cloner cloner) {
166      SingleObjectiveTestFunctionProblem clone = (SingleObjectiveTestFunctionProblem)base.Clone(cloner);
167      clone.operators = operators.Where(x => IsNotFieldReferenced(x)).Select(x => (IOperator)cloner.Clone(x)).ToList();
168      clone.strategyVectorCreator = (StdDevStrategyVectorCreator)cloner.Clone(strategyVectorCreator);
169      clone.operators.Add(clone.strategyVectorCreator);
170      clone.strategyVectorCrossover = (StdDevStrategyVectorCrossover)cloner.Clone(strategyVectorCrossover);
171      clone.operators.Add(strategyVectorCrossover);
172      clone.strategyVectorManipulator = (StdDevStrategyVectorManipulator)cloner.Clone(strategyVectorManipulator);
173      clone.operators.Add(strategyVectorManipulator);
174      clone.AttachEventHandlers();
175      return clone;
176    }
177
178    private bool IsNotFieldReferenced(IOperator x) {
179      return !(x == strategyVectorCreator
180        || x == strategyVectorCrossover
181        || x == strategyVectorManipulator);
182    }
183
184    #region Events
185    public event EventHandler SolutionCreatorChanged;
186    private void OnSolutionCreatorChanged() {
187      EventHandler handler = SolutionCreatorChanged;
188      if (handler != null) handler(this, EventArgs.Empty);
189    }
190    public event EventHandler EvaluatorChanged;
191    private void OnEvaluatorChanged() {
192      EventHandler handler = EvaluatorChanged;
193      if (handler != null) handler(this, EventArgs.Empty);
194    }
195    public event EventHandler OperatorsChanged;
196    private void OnOperatorsChanged() {
197      EventHandler handler = OperatorsChanged;
198      if (handler != null) handler(this, EventArgs.Empty);
199    }
200    public event EventHandler Reset;
201    private void OnReset() {
202      EventHandler handler = Reset;
203      if (handler != null) handler(this, EventArgs.Empty);
204    }
205
206    private void ProblemSizeParameter_ValueChanged(object sender, EventArgs e) {
207      ProblemSize.ValueChanged += new EventHandler(ProblemSize_ValueChanged);
208      ProblemSize_ValueChanged(null, EventArgs.Empty);
209    }
210    private void ProblemSize_ValueChanged(object sender, EventArgs e) {
211      if (ProblemSize.Value < 1) ProblemSize.Value = 1;
212      ParameterizeSolutionCreator();
213      ParameterizeEvaluator();
214      strategyVectorManipulator.GeneralLearningRateParameter.Value = new DoubleValue(1.0 / Math.Sqrt(2 * ProblemSize.Value));
215      strategyVectorManipulator.LearningRateParameter.Value = new DoubleValue(1.0 / Math.Sqrt(2 * Math.Sqrt(ProblemSize.Value)));
216      OnReset();
217    }
218    private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
219      ParameterizeSolutionCreator();
220      ParameterizeAnalyzers();
221      SolutionCreator_RealVectorParameter_ActualNameChanged(null, EventArgs.Empty);
222      OnSolutionCreatorChanged();
223    }
224    private void SolutionCreator_RealVectorParameter_ActualNameChanged(object sender, EventArgs e) {
225      ParameterizeEvaluator();
226      ParameterizeOperators();
227      ParameterizeAnalyzers();
228    }
229    private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
230      ParameterizeEvaluator();
231      UpdateMoveEvaluators();
232      ParameterizeAnalyzers();
233      Maximization.Value = Evaluator.Maximization;
234      BoundsParameter.Value = Evaluator.Bounds;
235      if (ProblemSize.Value < Evaluator.MinimumProblemSize)
236        ProblemSize.Value = Evaluator.MinimumProblemSize;
237      else if (ProblemSize.Value > Evaluator.MaximumProblemSize)
238        ProblemSize.Value = Evaluator.MaximumProblemSize;
239      BestKnownQuality = new DoubleValue(Evaluator.BestKnownQuality);
240      Evaluator_QualityParameter_ActualNameChanged(null, EventArgs.Empty);
241      OnEvaluatorChanged();
242      OnReset();
243    }
244    private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
245      ParameterizeOperators();
246    }
247    private void BoundsParameter_ValueChanged(object sender, EventArgs e) {
248      Bounds.ToStringChanged += new EventHandler(Bounds_ToStringChanged);
249      Bounds_ToStringChanged(null, EventArgs.Empty);
250    }
251    private void Bounds_ToStringChanged(object sender, EventArgs e) {
252      if (Bounds.Columns != 2 || Bounds.Rows < 1)
253        Bounds = new DoubleMatrix(1, 2);
254      ParameterizeOperators();
255      UpdateStrategyVectorBounds();
256    }
257    private void Bounds_ItemChanged(object sender, EventArgs<int, int> e) {
258      if (e.Value2 == 0 && Bounds[e.Value, 1] <= Bounds[e.Value, 0])
259        Bounds[e.Value, 1] = Bounds[e.Value, 0] + 0.1;
260      if (e.Value2 == 1 && Bounds[e.Value, 0] >= Bounds[e.Value, 1])
261        Bounds[e.Value, 0] = Bounds[e.Value, 1] - 0.1;
262      ParameterizeOperators();
263      UpdateStrategyVectorBounds();
264    }
265    private void MoveGenerator_AdditiveMoveParameter_ActualNameChanged(object sender, EventArgs e) {
266      string name = ((ILookupParameter<AdditiveMove>)sender).ActualName;
267      foreach (IAdditiveRealVectorMoveOperator op in Operators.OfType<IAdditiveRealVectorMoveOperator>()) {
268        op.AdditiveMoveParameter.ActualName = name;
269      }
270    }
271    private void SphereEvaluator_Parameter_ValueChanged(object sender, EventArgs e) {
272      SphereEvaluator eval = (Evaluator as SphereEvaluator);
273      if (eval != null) {
274        foreach (ISphereMoveEvaluator op in Operators.OfType<ISphereMoveEvaluator>()) {
275          op.C = eval.C;
276          op.Alpha = eval.Alpha;
277        }
278      }
279    }
280    private void RastriginEvaluator_Parameter_ValueChanged(object sender, EventArgs e) {
281      RastriginEvaluator eval = (Evaluator as RastriginEvaluator);
282      if (eval != null) {
283        foreach (IRastriginMoveEvaluator op in Operators.OfType<IRastriginMoveEvaluator>()) {
284          op.A = eval.A;
285        }
286      }
287    }
288    private void strategyVectorCreator_BoundsParameter_ValueChanged(object sender, EventArgs e) {
289      strategyVectorManipulator.BoundsParameter.Value = (DoubleMatrix)strategyVectorCreator.BoundsParameter.Value.Clone();
290    }
291    private void strategyVectorCreator_StrategyParameterParameter_ActualNameChanged(object sender, EventArgs e) {
292      string name = strategyVectorCreator.StrategyParameterParameter.ActualName;
293      strategyVectorCrossover.ParentsParameter.ActualName = name;
294      strategyVectorCrossover.StrategyParameterParameter.ActualName = name;
295      strategyVectorManipulator.StrategyParameterParameter.ActualName = name;
296    }
297    #endregion
298
299    #region Helpers
300    [StorableHook(HookType.AfterDeserialization)]
301    private void AfterDeserializationHook() {
302      // BackwardsCompatibility3.3
303      #region Backwards compatible code (remove with 3.4)
304      if (operators == null) InitializeOperators();
305      #endregion
306      AttachEventHandlers();
307    }
308
309    private void AttachEventHandlers() {
310      ProblemSizeParameter.ValueChanged += new EventHandler(ProblemSizeParameter_ValueChanged);
311      ProblemSize.ValueChanged += new EventHandler(ProblemSize_ValueChanged);
312      BoundsParameter.ValueChanged += new EventHandler(BoundsParameter_ValueChanged);
313      Bounds.ToStringChanged += new EventHandler(Bounds_ToStringChanged);
314      Bounds.ItemChanged += new EventHandler<EventArgs<int, int>>(Bounds_ItemChanged);
315      SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
316      SolutionCreator.RealVectorParameter.ActualNameChanged += new EventHandler(SolutionCreator_RealVectorParameter_ActualNameChanged);
317      EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
318      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
319      strategyVectorCreator.BoundsParameter.ValueChanged += new EventHandler(strategyVectorCreator_BoundsParameter_ValueChanged);
320      strategyVectorCreator.StrategyParameterParameter.ActualNameChanged += new EventHandler(strategyVectorCreator_StrategyParameterParameter_ActualNameChanged);
321    }
322    private void ParameterizeAnalyzers() {
323      BestSingleObjectiveTestFunctionSolutionAnalyzer.RealVectorParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
324      BestSingleObjectiveTestFunctionSolutionAnalyzer.ResultsParameter.ActualName = "Results";
325      BestSingleObjectiveTestFunctionSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
326      BestSingleObjectiveTestFunctionSolutionAnalyzer.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
327      BestSingleObjectiveTestFunctionSolutionAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
328      BestSingleObjectiveTestFunctionSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
329      BestSingleObjectiveTestFunctionSolutionAnalyzer.EvaluatorParameter.ActualName = EvaluatorParameter.Name;
330      BestSingleObjectiveTestFunctionSolutionAnalyzer.BoundsParameter.ActualName = BoundsParameter.Name;
331    }
332    private void InitializeOperators() {
333      operators = new List<IOperator>();
334      operators.Add(new BestSingleObjectiveTestFunctionSolutionAnalyzer());
335      ParameterizeAnalyzers();
336      operators.AddRange(ApplicationManager.Manager.GetInstances<IRealVectorOperator>().Cast<IOperator>());
337      operators.Add(strategyVectorCreator);
338      operators.Add(strategyVectorCrossover);
339      operators.Add(strategyVectorManipulator);
340      UpdateMoveEvaluators();
341      ParameterizeOperators();
342      InitializeMoveGenerators();
343    }
344    private void InitializeMoveGenerators() {
345      foreach (IAdditiveRealVectorMoveOperator op in Operators.OfType<IAdditiveRealVectorMoveOperator>()) {
346        if (op is IMoveGenerator) {
347          op.AdditiveMoveParameter.ActualNameChanged += new EventHandler(MoveGenerator_AdditiveMoveParameter_ActualNameChanged);
348        }
349      }
350    }
351    private void UpdateMoveEvaluators() {
352      foreach (ISingleObjectiveTestFunctionMoveEvaluator op in Operators.OfType<ISingleObjectiveTestFunctionMoveEvaluator>().ToList())
353        operators.Remove(op);
354      foreach (ISingleObjectiveTestFunctionMoveEvaluator op in ApplicationManager.Manager.GetInstances<ISingleObjectiveTestFunctionMoveEvaluator>())
355        if (op.EvaluatorType == Evaluator.GetType()) {
356          operators.Add(op);
357          #region Synchronize evaluator specific parameters with the parameters of the corresponding move evaluators
358          if (op is ISphereMoveEvaluator) {
359            SphereEvaluator e = (Evaluator as SphereEvaluator);
360            e.AlphaParameter.ValueChanged += new EventHandler(SphereEvaluator_Parameter_ValueChanged);
361            e.CParameter.ValueChanged += new EventHandler(SphereEvaluator_Parameter_ValueChanged);
362            ISphereMoveEvaluator em = (op as ISphereMoveEvaluator);
363            em.C = e.C;
364            em.Alpha = e.Alpha;
365          } else if (op is IRastriginMoveEvaluator) {
366            RastriginEvaluator e = (Evaluator as RastriginEvaluator);
367            e.AParameter.ValueChanged += new EventHandler(RastriginEvaluator_Parameter_ValueChanged);
368            IRastriginMoveEvaluator em = (op as IRastriginMoveEvaluator);
369            em.A = e.A;
370          }
371          #endregion
372        }
373      ParameterizeOperators();
374      OnOperatorsChanged();
375    }
376    private void ParameterizeSolutionCreator() {
377      SolutionCreator.LengthParameter.Value = new IntValue(ProblemSize.Value);
378    }
379    private void ParameterizeEvaluator() {
380      Evaluator.PointParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
381      BestKnownSolutionParameter.Value = Evaluator.GetBestKnownSolution(ProblemSize.Value);
382    }
383    private void ParameterizeOperators() {
384      foreach (IRealVectorCrossover op in Operators.OfType<IRealVectorCrossover>()) {
385        op.ParentsParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
386        op.ChildParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
387        op.BoundsParameter.ActualName = BoundsParameter.Name;
388      }
389      foreach (IRealVectorManipulator op in Operators.OfType<IRealVectorManipulator>()) {
390        op.RealVectorParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
391        op.BoundsParameter.ActualName = BoundsParameter.Name;
392      }
393      foreach (IRealVectorMoveOperator op in Operators.OfType<IRealVectorMoveOperator>()) {
394        op.RealVectorParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
395      }
396      foreach (IRealVectorMoveGenerator op in Operators.OfType<IRealVectorMoveGenerator>()) {
397        op.BoundsParameter.ActualName = BoundsParameter.Name;
398      }
399      foreach (ISingleObjectiveTestFunctionAdditiveMoveEvaluator op in Operators.OfType<ISingleObjectiveTestFunctionAdditiveMoveEvaluator>()) {
400        op.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
401        op.RealVectorParameter.ActualName = SolutionCreator.RealVectorParameter.ActualName;
402      }
403      foreach (IRealVectorPSOEncoder op in Operators.OfType<IRealVectorPSOEncoder>()) {
404        ((ILookupParameter)op.OriginalRealVectorParameter).ActualName = SolutionCreator.RealVectorParameter.ActualName;
405        op.BoundsParameter.Value = (DoubleMatrix)BoundsParameter.Value.Clone();
406        op.BoundsParameter.ActualName = "ParticleBounds";
407      }
408    }
409    private void UpdateStrategyVectorBounds() {
410      DoubleMatrix strategyBounds = (DoubleMatrix)Bounds.Clone();
411      for (int i = 0; i < strategyBounds.Rows; i++)
412        if (strategyBounds[i, 0] < 0) strategyBounds[i, 0] = 0;
413      strategyVectorCreator.BoundsParameter.Value = strategyBounds;
414    }
415    #endregion
416  }
417}
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