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source: branches/GeneralizedQAP/HeuristicLab.Encodings.IntegerVectorEncoding/3.3/IntegerVectorEncoding.cs @ 15605

Last change on this file since 15605 was 15605, checked in by abeham, 6 years ago

#1614: merged trunk into branch

File size: 12.0 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Data;
28using HeuristicLab.Optimization;
29using HeuristicLab.Parameters;
30using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
31using HeuristicLab.PluginInfrastructure;
32
33namespace HeuristicLab.Encodings.IntegerVectorEncoding {
34  [Item("IntegerVectorEncoding", "Describes an integer vector encoding.")]
35  [StorableClass]
36  public sealed class IntegerVectorEncoding : Encoding<IIntegerVectorCreator> {
37    #region Encoding Parameters
38    [Storable]
39    private IFixedValueParameter<IntValue> lengthParameter;
40    public IFixedValueParameter<IntValue> LengthParameter {
41      get { return lengthParameter; }
42      set {
43        if (value == null) throw new ArgumentNullException("Length parameter must not be null.");
44        if (value.Value == null) throw new ArgumentNullException("Length parameter value must not be null.");
45        if (lengthParameter == value) return;
46
47        if (lengthParameter != null) Parameters.Remove(lengthParameter);
48        lengthParameter = value;
49        Parameters.Add(lengthParameter);
50        OnLengthParameterChanged();
51      }
52    }
53
54    [Storable]
55    private IValueParameter<IntMatrix> boundsParameter;
56    public IValueParameter<IntMatrix> BoundsParameter {
57      get { return boundsParameter; }
58      set {
59        if (value == null) throw new ArgumentNullException("Bounds parameter must not be null.");
60        if (boundsParameter == value) return;
61
62        if (boundsParameter != null) Parameters.Remove(boundsParameter);
63        boundsParameter = value;
64        Parameters.Add(boundsParameter);
65        OnBoundsParameterChanged();
66      }
67    }
68    #endregion
69
70    public int Length {
71      get { return LengthParameter.Value.Value; }
72      set { LengthParameter.Value.Value = value; }
73    }
74    public IntMatrix Bounds {
75      get { return BoundsParameter.Value; }
76      set { BoundsParameter.Value = value; }
77    }
78
79    [StorableConstructor]
80    private IntegerVectorEncoding(bool deserializing) : base(deserializing) { }
81    [StorableHook(HookType.AfterDeserialization)]
82    private void AfterDeserialization() {
83      RegisterParameterEvents();
84      DiscoverOperators();
85    }
86
87    private IntegerVectorEncoding(IntegerVectorEncoding original, Cloner cloner)
88      : base(original, cloner) {
89      lengthParameter = cloner.Clone(original.lengthParameter);
90      boundsParameter = cloner.Clone(original.boundsParameter);
91      RegisterParameterEvents();
92    }
93    public override IDeepCloneable Clone(Cloner cloner) { return new IntegerVectorEncoding(this, cloner); }
94
95
96    public IntegerVectorEncoding() : this("IntegerVector", 10) { }
97    public IntegerVectorEncoding(string name) : this(name, 10) { }
98    public IntegerVectorEncoding(int length) : this("integerVector", length) { }
99    public IntegerVectorEncoding(string name, int length, int min = int.MinValue, int max = int.MaxValue, int? step = null)
100      : base(name) {
101      if (min >= max) throw new ArgumentException("min must be less than max", "min");
102      if (step.HasValue && step.Value <= 0) throw new ArgumentException("step must be greater than zero or null", "step");
103
104      var bounds = new IntMatrix(1, step.HasValue ? 3 : 2);
105      bounds[0, 0] = min;
106      bounds[0, 1] = max;
107      if (step.HasValue) bounds[0, 2] = step.Value;
108
109      lengthParameter = new FixedValueParameter<IntValue>(Name + ".Length", new IntValue(length));
110      boundsParameter = new ValueParameter<IntMatrix>(Name + ".Bounds", bounds);
111      Parameters.Add(lengthParameter);
112      Parameters.Add(boundsParameter);
113
114      SolutionCreator = new UniformRandomIntegerVectorCreator();
115      RegisterParameterEvents();
116      DiscoverOperators();
117    }
118    public IntegerVectorEncoding(string name, int length, IList<int> min, IList<int> max, IList<int> step = null)
119      : base(name) {
120      if (min.Count == 0) throw new ArgumentException("Bounds must be given for the integer parameters.");
121      if (min.Count != max.Count) throw new ArgumentException("min must be of the same length as max", "min");
122      if (step != null && min.Count != step.Count) throw new ArgumentException("step must be of the same length as min or null", "step");
123      if (min.Zip(max, (mi, ma) => mi >= ma).Any(x => x)) throw new ArgumentException("min must be less than max in each dimension", "min");
124
125      var bounds = new IntMatrix(min.Count, step != null ? 3 : 2);
126      for (int i = 0; i < min.Count; i++) {
127        bounds[i, 0] = min[i];
128        bounds[i, 1] = max[i];
129        if (step != null) bounds[i, 2] = step[i];
130      }
131
132      lengthParameter = new FixedValueParameter<IntValue>(Name + ".Length", new IntValue(length));
133      boundsParameter = new ValueParameter<IntMatrix>(Name + ".Bounds", bounds);
134      Parameters.Add(lengthParameter);
135      Parameters.Add(boundsParameter);
136
137      SolutionCreator = new UniformRandomIntegerVectorCreator();
138      RegisterParameterEvents();
139      DiscoverOperators();
140    }
141
142    private void OnLengthParameterChanged() {
143      RegisterLengthParameterEvents();
144      ConfigureOperators(Operators);
145    }
146    private void OnBoundsParameterChanged() {
147      RegisterBoundsParameterEvents();
148      ConfigureOperators(Operators);
149    }
150
151    private void RegisterParameterEvents() {
152      RegisterLengthParameterEvents();
153      RegisterBoundsParameterEvents();
154    }
155    private void RegisterLengthParameterEvents() {
156      LengthParameter.ValueChanged += (o, s) => ConfigureOperators(Operators);
157      LengthParameter.Value.ValueChanged += (o, s) => ConfigureOperators(Operators);
158    }
159    private void RegisterBoundsParameterEvents() {
160      BoundsParameter.ValueChanged += (o, s) => ConfigureOperators(Operators);
161      boundsParameter.Value.ToStringChanged += (o, s) => ConfigureOperators(Operators);
162    }
163
164
165    #region Operator Discovery
166    private static readonly IEnumerable<Type> encodingSpecificOperatorTypes;
167    static IntegerVectorEncoding() {
168      encodingSpecificOperatorTypes = new List<Type>() {
169        typeof (IIntegerVectorOperator),
170        typeof (IIntegerVectorCreator),
171        typeof (IIntegerVectorCrossover),
172        typeof (IIntegerVectorManipulator),
173        typeof (IIntegerVectorStdDevStrategyParameterOperator),
174        typeof (IIntegerVectorMultiNeighborhoodShakingOperator),
175      };
176    }
177    private void DiscoverOperators() {
178      var assembly = typeof(IIntegerVectorOperator).Assembly;
179      var discoveredTypes = ApplicationManager.Manager.GetTypes(encodingSpecificOperatorTypes, assembly, true, false, false);
180      var operators = discoveredTypes.Select(t => (IOperator)Activator.CreateInstance(t));
181      var newOperators = operators.Except(Operators, new TypeEqualityComparer<IOperator>()).ToList();
182
183      ConfigureOperators(newOperators);
184      foreach (var @operator in newOperators)
185        AddOperator(@operator);
186    }
187    #endregion
188
189    public override void ConfigureOperators(IEnumerable<IOperator> operators) {
190      ConfigureBoundedOperators(operators.OfType<IBoundedIntegerVectorOperator>());
191      ConfigureCreators(operators.OfType<IIntegerVectorCreator>());
192      ConfigureCrossovers(operators.OfType<IIntegerVectorCrossover>());
193      ConfigureManipulators(operators.OfType<IIntegerVectorManipulator>());
194      ConfigureShakingOperators(operators.OfType<IIntegerVectorMultiNeighborhoodShakingOperator>());
195      ConfigureStrategyVectorOperator(operators.OfType<IIntegerVectorStdDevStrategyParameterOperator>());
196    }
197
198    #region Specific Operator Wiring
199    private void ConfigureBoundedOperators(IEnumerable<IBoundedIntegerVectorOperator> boundedOperators) {
200      foreach (var boundedOperator in boundedOperators) {
201        boundedOperator.BoundsParameter.ActualName = BoundsParameter.Name;
202      }
203    }
204
205    private void ConfigureCreators(IEnumerable<IIntegerVectorCreator> creators) {
206      foreach (var creator in creators) {
207        creator.IntegerVectorParameter.ActualName = Name;
208        creator.BoundsParameter.ActualName = BoundsParameter.Name;
209        creator.LengthParameter.ActualName = LengthParameter.Name;
210      }
211    }
212
213    private void ConfigureCrossovers(IEnumerable<IIntegerVectorCrossover> crossovers) {
214      foreach (var crossover in crossovers) {
215        crossover.ChildParameter.ActualName = Name;
216        crossover.ParentsParameter.ActualName = Name;
217      }
218    }
219
220    private void ConfigureManipulators(IEnumerable<IIntegerVectorManipulator> manipulators) {
221      foreach (var manipulator in manipulators) {
222        manipulator.IntegerVectorParameter.ActualName = Name;
223        manipulator.IntegerVectorParameter.Hidden = true;
224        var sm = manipulator as ISelfAdaptiveManipulator;
225        if (sm != null) {
226          var p = sm.StrategyParameterParameter as ILookupParameter;
227          if (p != null) {
228            p.ActualName = Name + "Strategy";
229          }
230        }
231      }
232    }
233
234    private void ConfigureShakingOperators(IEnumerable<IIntegerVectorMultiNeighborhoodShakingOperator> shakingOperators) {
235      foreach (var shakingOperator in shakingOperators) {
236        shakingOperator.IntegerVectorParameter.ActualName = Name;
237      }
238    }
239
240    private void ConfigureStrategyVectorOperator(IEnumerable<IIntegerVectorStdDevStrategyParameterOperator> strategyVectorOperators) {
241      var bounds = new DoubleMatrix(Bounds.Rows, Bounds.Columns);
242      for (var i = 0; i < bounds.Rows; i++) {
243        bounds[i, 1] = (int)Math.Ceiling(0.33 * (Bounds[i, 1] - Bounds[i, 0]));
244        bounds[i, 0] = 0;
245        if (bounds.Columns > 2) bounds[i, 2] = Bounds[i, 2];
246      }
247      foreach (var s in strategyVectorOperators) {
248        var c = s as IIntegerVectorStdDevStrategyParameterCreator;
249        if (c != null) {
250          c.BoundsParameter.Value = (DoubleMatrix)bounds.Clone();
251          c.LengthParameter.ActualName = Name;
252          c.StrategyParameterParameter.ActualName = Name + "Strategy";
253        }
254        var m = s as IIntegerVectorStdDevStrategyParameterManipulator;
255        if (m != null) {
256          m.BoundsParameter.Value = (DoubleMatrix)bounds.Clone();
257          m.StrategyParameterParameter.ActualName = Name + "Strategy";
258        }
259        var mm = s as StdDevStrategyVectorManipulator;
260        if (mm != null) {
261          mm.GeneralLearningRateParameter.Value = new DoubleValue(1.0 / Math.Sqrt(2 * Length));
262          mm.LearningRateParameter.Value = new DoubleValue(1.0 / Math.Sqrt(2 * Math.Sqrt(Length)));
263        }
264        var x = s as IIntegerVectorStdDevStrategyParameterCrossover;
265        if (x != null) {
266          x.ParentsParameter.ActualName = Name + "Strategy";
267          x.StrategyParameterParameter.ActualName = Name + "Strategy";
268        }
269      }
270    }
271    #endregion
272  }
273
274  public static class IndividualExtensionMethods {
275    public static IntegerVector IntegerVector(this Individual individual) {
276      var encoding = individual.GetEncoding<IntegerVectorEncoding>();
277      return individual.IntegerVector(encoding.Name);
278    }
279    public static IntegerVector IntegerVector(this Individual individual, string name) {
280      return (IntegerVector)individual[name];
281    }
282  }
283}
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