1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Linq;
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25 | using System.Text;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 | using HeuristicLab.Operators;
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29 | using HeuristicLab.Common;
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30 | using HeuristicLab.Parameters;
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31 | using HeuristicLab.Algorithms.LocalSearch;
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32 | using HeuristicLab.Data;
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33 | using HeuristicLab.Optimization;
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34 |
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35 | namespace HeuristicLab.Algorithms.VariableNeighborhoodSearch {
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36 | /// <summary>
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37 | /// A local search improvement operator.
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38 | /// </summary>
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39 | [Item("LocalSearchImprovement", "A local search improvement operator.")]
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40 | [StorableClass]
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41 | public class LocalSearchImprovement: SingleSuccessorOperator, ILocalImprovement {
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42 | [Storable]
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43 | private LocalSearchMainLoop loop;
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44 |
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45 | private /*Constrained*/ValueParameter<IMoveGenerator> MoveGeneratorParameter {
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46 | get { return (/*Constrained*/ValueParameter<IMoveGenerator>)Parameters["MoveGenerator"]; }
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47 | }
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48 | private /*Constrained*/ValueParameter<IMoveMaker> MoveMakerParameter {
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49 | get { return (/*Constrained*/ValueParameter<IMoveMaker>)Parameters["MoveMaker"]; }
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50 | }
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51 | private /*Constrained*/ValueParameter<ISingleObjectiveMoveEvaluator> MoveEvaluatorParameter {
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52 | get { return (/*Constrained*/ValueParameter<ISingleObjectiveMoveEvaluator>)Parameters["MoveEvaluator"]; }
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53 | }
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54 | private ValueParameter<IntValue> MaximumIterationsParameter {
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55 | get { return (ValueParameter<IntValue>)Parameters["MaximumIterations"]; }
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56 | }
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57 | private ValueParameter<IntValue> SampleSizeParameter {
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58 | get { return (ValueParameter<IntValue>)Parameters["SampleSize"]; }
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59 | }
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60 | public LookupParameter<IntValue> EvaluatedMovesParameter {
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61 | get { return (LookupParameter<IntValue>)Parameters["EvaluatedMoves"]; }
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62 | }
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63 |
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64 | public IMoveGenerator MoveGenerator {
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65 | get { return MoveGeneratorParameter.Value; }
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66 | set { MoveGeneratorParameter.Value = value; }
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67 | }
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68 | public IMoveMaker MoveMaker {
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69 | get { return MoveMakerParameter.Value; }
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70 | set { MoveMakerParameter.Value = value; }
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71 | }
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72 | public ISingleObjectiveMoveEvaluator MoveEvaluator {
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73 | get { return MoveEvaluatorParameter.Value; }
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74 | set { MoveEvaluatorParameter.Value = value; }
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75 | }
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76 |
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77 | [StorableConstructor]
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78 | protected LocalSearchImprovement(bool deserializing) : base(deserializing) { }
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79 | protected LocalSearchImprovement(LocalSearchImprovement original, Cloner cloner)
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80 | : base(original, cloner) {
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81 | this.loop = cloner.Clone(original.loop);
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82 | }
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83 | public override IDeepCloneable Clone(Cloner cloner) {
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84 | return new LocalSearchImprovement(this, cloner);
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85 | }
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86 | public LocalSearchImprovement()
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87 | : base() {
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88 | loop = new LocalSearchMainLoop();
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89 |
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90 | Parameters.Add(new /*Constrained*/ValueParameter<IMoveGenerator>("MoveGenerator", "The operator used to generate moves to the neighborhood of the current solution."));
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91 | Parameters.Add(new /*Constrained*/ValueParameter<IMoveMaker>("MoveMaker", "The operator used to perform a move."));
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92 | Parameters.Add(new /*Constrained*/ValueParameter<ISingleObjectiveMoveEvaluator>("MoveEvaluator", "The operator used to evaluate a move."));
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93 | Parameters.Add(new ValueParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed.", new IntValue(1000)));
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94 | Parameters.Add(new ValueParameter<IntValue>("SampleSize", "Number of moves that MultiMoveGenerators should create. This is ignored for Exhaustive- and SingleMoveGenerators.", new IntValue(100)));
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95 | Parameters.Add(new LookupParameter<IntValue>("EvaluatedMoves", "The number of evaluated moves."));
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96 | }
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97 |
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98 | public void Parameterize(IProblem problem) {
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99 | UpdateMoveOperators(problem);
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100 | }
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101 |
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102 | private void UpdateMoveOperators(IProblem problem) {
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103 | /* IMoveGenerator oldMoveGenerator = MoveGenerator;
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104 | MoveGeneratorParameter.ValidValues.Clear();
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105 | if (problem != null) {
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106 | foreach (IMoveGenerator generator in problem.Operators.OfType<IMoveGenerator>().OrderBy(x => x.Name))
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107 | MoveGeneratorParameter.ValidValues.Add(generator);
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108 |
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109 | foreach (IMoveMaker maker in problem.Operators.OfType<IMoveMaker>().OrderBy(x => x.Name))
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110 | MoveMakerParameter.ValidValues.Add(maker);
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111 |
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112 | foreach (ISingleObjectiveMoveEvaluator evaluator in problem.Operators.OfType<ISingleObjectiveMoveEvaluator>().OrderBy(x => x.Name))
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113 | MoveEvaluatorParameter.ValidValues.Add(evaluator);
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114 | }
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115 |
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116 | if (oldMoveGenerator != null) {
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117 | IMoveGenerator newMoveGenerator = MoveGeneratorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveGenerator.GetType());
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118 | if (newMoveGenerator != null) MoveGenerator = newMoveGenerator;
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119 | }
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120 | if (MoveGenerator == null) {
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121 | ClearMoveParameters();
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122 | }
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123 |
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124 | IMoveMaker oldMoveMaker = MoveMaker;
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125 | if (oldMoveMaker != null) {
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126 | IMoveMaker mm = MoveMakerParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveMaker.GetType());
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127 | if (mm != null) MoveMaker = mm;
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128 | }
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129 |
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130 | ISingleObjectiveMoveEvaluator oldMoveEvaluator = MoveEvaluator;
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131 | if (oldMoveEvaluator != null) {
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132 | ISingleObjectiveMoveEvaluator me = MoveEvaluatorParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldMoveEvaluator.GetType());
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133 | if (me != null) MoveEvaluator = me;
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134 | }*/
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135 | }
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136 |
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137 | private void ClearMoveParameters() {
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138 | /*MoveMakerParameter.ValidValues.Clear();
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139 | MoveEvaluatorParameter.ValidValues.Clear();*/
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140 | }
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141 |
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142 | public override IOperation Apply() {
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143 | Scope subScope = new Scope();
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144 | Scope individual = new Scope();
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145 |
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146 | foreach (Variable var in ExecutionContext.Scope.Variables) {
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147 | individual.Variables.Add(var);
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148 | }
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149 | subScope.SubScopes.Add(individual);
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150 |
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151 | ExecutionContext.Scope.SubScopes.Add(subScope);
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152 | int index = subScope.Parent.SubScopes.IndexOf(subScope);
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153 |
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154 | SubScopesProcessor processor = new SubScopesProcessor();
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155 | SubScopesRemover remover = new SubScopesRemover();
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156 |
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157 | remover.RemoveAllSubScopes = false;
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158 | remover.SubScopeIndexParameter.Value = new IntValue(index);
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159 |
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160 | for (int i = 0; i < index; i++) {
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161 | processor.Operators.Add(new EmptyOperator());
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162 | }
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163 |
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164 | loop.MoveGeneratorParameter.Value = MoveGeneratorParameter.Value;
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165 | loop.MoveEvaluatorParameter.Value = MoveEvaluatorParameter.Value;
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166 | loop.MoveMakerParameter.Value = MoveMakerParameter.Value;
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167 | loop.MaximumIterationsParameter.Value = MaximumIterationsParameter.Value;
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168 |
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169 | processor.Operators.Add(loop);
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170 | processor.Successor = remover;
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171 |
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172 | IOperation next = base.Apply();
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173 | if (next as ExecutionContext != null) {
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174 | remover.Successor = (next as ExecutionContext).Operator;
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175 | }
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176 |
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177 | return ExecutionContext.CreateOperation(processor);
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178 | }
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179 | }
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180 | }
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