| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2010 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 HeuristicLab.Analysis;
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| 23 | using HeuristicLab.Core;
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| 24 | using HeuristicLab.Data;
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| 25 | using HeuristicLab.Operators;
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| 26 | using HeuristicLab.Parameters;
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| 27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 28 | using HeuristicLab.Selection;
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| 29 |
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| 30 | namespace HeuristicLab.Algorithms.TabuSearch {
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| 31 | /// <summary>
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| 32 | /// An operator which represents a tabu search.
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| 33 | /// </summary>
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| 34 | [Item("TabuSearchMainLoop", "An operator which represents the main loop of a tabu search.")]
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| 35 | [StorableClass]
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| 36 | public class TabuSearchMainLoop : AlgorithmOperator {
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| 37 | #region Parameter properties
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| 38 | public ValueLookupParameter<IRandom> RandomParameter {
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| 39 | get { return (ValueLookupParameter<IRandom>)Parameters["Random"]; }
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| 40 | }
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| 41 | public ValueLookupParameter<BoolValue> MaximizationParameter {
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| 42 | get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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| 43 | }
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| 44 | public LookupParameter<DoubleValue> QualityParameter {
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| 45 | get { return (LookupParameter<DoubleValue>)Parameters["Quality"]; }
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| 46 | }
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| 47 | public LookupParameter<DoubleValue> MoveQualityParameter {
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| 48 | get { return (LookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
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| 49 | }
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| 50 | public LookupParameter<BoolValue> MoveTabuParameter {
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| 51 | get { return (LookupParameter<BoolValue>)Parameters["MoveTabu"]; }
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| 52 | }
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| 53 | public ValueLookupParameter<IntValue> MaximumIterationsParameter {
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| 54 | get { return (ValueLookupParameter<IntValue>)Parameters["MaximumIterations"]; }
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| 55 | }
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| 56 | public ValueLookupParameter<IntValue> TabuTenureParameter {
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| 57 | get { return (ValueLookupParameter<IntValue>)Parameters["TabuTenure"]; }
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| 58 | }
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| 59 | public ValueLookupParameter<VariableCollection> ResultsParameter {
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| 60 | get { return (ValueLookupParameter<VariableCollection>)Parameters["Results"]; }
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| 61 | }
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| 62 | public ValueLookupParameter<IOperator> MoveGeneratorParameter {
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| 63 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveGenerator"]; }
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| 64 | }
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| 65 | public ValueLookupParameter<IOperator> MoveEvaluatorParameter {
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| 66 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveEvaluator"]; }
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| 67 | }
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| 68 | public ValueLookupParameter<IOperator> MoveMakerParameter {
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| 69 | get { return (ValueLookupParameter<IOperator>)Parameters["MoveMaker"]; }
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| 70 | }
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| 71 | public ValueLookupParameter<IOperator> TabuMoveEvaluatorParameter {
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| 72 | get { return (ValueLookupParameter<IOperator>)Parameters["TabuMoveEvaluator"]; }
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| 73 | }
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| 74 | public ValueLookupParameter<IOperator> TabuMoveMakerParameter {
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| 75 | get { return (ValueLookupParameter<IOperator>)Parameters["TabuMoveMaker"]; }
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| 76 | }
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| 77 |
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| 78 | private ScopeParameter CurrentScopeParameter {
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| 79 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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| 80 | }
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| 81 | public IScope CurrentScope {
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| 82 | get { return CurrentScopeParameter.ActualValue; }
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| 83 | }
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| 84 | #endregion
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| 85 |
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| 86 | public TabuSearchMainLoop()
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| 87 | : base() {
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| 88 | #region Create parameters
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| 89 | Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
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| 90 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false."));
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| 91 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The value which represents the quality of a solution."));
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| 92 | Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The value which represents the quality of a move."));
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| 93 | Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The value that indicates if a move is tabu or not."));
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| 94 | Parameters.Add(new ValueLookupParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed."));
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| 95 | Parameters.Add(new ValueLookupParameter<IntValue>("TabuTenure", "The length of the tabu list, and also means the number of iterations a move is kept tabu"));
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| 96 | Parameters.Add(new ValueLookupParameter<VariableCollection>("Results", "The variable collection where results should be stored."));
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| 97 |
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| 98 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveGenerator", "The operator that generates the moves."));
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| 99 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveMaker", "The operator that performs a move and updates the quality."));
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| 100 | Parameters.Add(new ValueLookupParameter<IOperator>("MoveEvaluator", "The operator that evaluates a move."));
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| 101 | Parameters.Add(new ValueLookupParameter<IOperator>("TabuMoveEvaluator", "The operator that evaluates whether a move is tabu."));
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| 102 | Parameters.Add(new ValueLookupParameter<IOperator>("TabuMoveMaker", "The operator that declares a move tabu."));
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| 103 |
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| 104 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope which represents a population of solutions on which the TS should be applied."));
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| 105 | #endregion
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| 106 |
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| 107 | #region Create operators
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| 108 | TabuListCreator tabuListCreator = new TabuListCreator();
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| 109 | VariableCreator variableCreator = new VariableCreator();
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| 110 | BestQualityMemorizer bestQualityMemorizer = new BestQualityMemorizer();
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| 111 | ResultsCollector resultsCollector = new ResultsCollector();
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| 112 | UniformSequentialSubScopesProcessor mainProcessor = new UniformSequentialSubScopesProcessor();
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| 113 | Placeholder moveGenerator = new Placeholder();
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| 114 | UniformSequentialSubScopesProcessor moveEvaluationProcessor = new UniformSequentialSubScopesProcessor();
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| 115 | Placeholder moveEvaluator = new Placeholder();
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| 116 | Placeholder tabuMoveEvaluator = new Placeholder();
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| 117 | SubScopesSorter moveQualitySorter = new SubScopesSorter();
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| 118 | BestAverageWorstQualityCalculator bestAverageWorstMoveQualityCalculator = new BestAverageWorstQualityCalculator();
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| 119 | TabuSelector tabuSelector = new TabuSelector();
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| 120 | RightReducer rightReducer = new RightReducer();
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| 121 | UniformSequentialSubScopesProcessor moveMakingProcessor = new UniformSequentialSubScopesProcessor();
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| 122 | Placeholder tabuMoveMaker = new Placeholder();
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| 123 | Placeholder moveMaker = new Placeholder();
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| 124 | DataTableValuesCollector valuesCollector = new DataTableValuesCollector();
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| 125 | SubScopesRemover subScopesRemover = new SubScopesRemover();
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| 126 | IntCounter iterationsCounter = new IntCounter();
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| 127 | Comparator iterationsComparator = new Comparator();
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| 128 | ConditionalBranch iterationsTermination = new ConditionalBranch();
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| 129 | EmptyOperator finished = new EmptyOperator();
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| 130 |
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| 131 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Iterations", new IntValue(0)));
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| 132 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Best Move Quality", new DoubleValue(0)));
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| 133 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Average Move Quality", new DoubleValue(0)));
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| 134 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("Worst Move Quality", new DoubleValue(0)));
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| 135 | variableCreator.CollectedValues.Add(new ValueParameter<DataTable>("MoveQualities", new DataTable("MoveQualities")));
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| 136 |
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| 137 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Iterations"));
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| 138 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Quality") { ActualName = "BestQuality" });
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| 139 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
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| 140 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
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| 141 | resultsCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
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| 142 | resultsCollector.CollectedValues.Add(new LookupParameter<DataTable>("MoveQualities"));
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| 143 | resultsCollector.ResultsParameter.ActualName = "Results";
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| 144 |
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| 145 | mainProcessor.Name = "Solution processor (UniformSequentialSubScopesProcessor)";
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| 146 |
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| 147 | moveGenerator.Name = "MoveGenerator (placeholder)";
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| 148 | moveGenerator.OperatorParameter.ActualName = "MoveGenerator";
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| 149 |
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| 150 | moveEvaluator.Name = "MoveEvaluator (placeholder)";
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| 151 | moveEvaluator.OperatorParameter.ActualName = "MoveEvaluator";
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| 152 |
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| 153 | tabuMoveEvaluator.Name = "TabuMoveEvaluator (placeholder)";
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| 154 | tabuMoveEvaluator.OperatorParameter.ActualName = "TabuMoveEvaluator";
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| 155 |
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| 156 | moveQualitySorter.DescendingParameter.ActualName = "Maximization";
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| 157 | moveQualitySorter.ValueParameter.ActualName = "MoveQuality";
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| 158 |
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| 159 | bestAverageWorstMoveQualityCalculator.AverageQualityParameter.ActualName = "Average Move Quality";
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| 160 | bestAverageWorstMoveQualityCalculator.BestQualityParameter.ActualName = "Best Move Quality";
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| 161 | bestAverageWorstMoveQualityCalculator.MaximizationParameter.ActualName = "Maximization";
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| 162 | bestAverageWorstMoveQualityCalculator.QualityParameter.ActualName = "MoveQuality";
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| 163 | bestAverageWorstMoveQualityCalculator.WorstQualityParameter.ActualName = "Worst Move Quality";
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| 164 |
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| 165 | moveMakingProcessor.Name = "MoveMaking processor (UniformSequentialSubScopesProcessor)";
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| 166 |
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| 167 | tabuMoveMaker.Name = "TabuMoveMaker (placeholder)";
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| 168 | tabuMoveMaker.OperatorParameter.ActualName = "TabuMoveMaker";
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| 169 |
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| 170 | moveMaker.Name = "MoveMaker (placeholder)";
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| 171 | moveMaker.OperatorParameter.ActualName = "MoveMaker";
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| 172 |
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| 173 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Best Move Quality"));
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| 174 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Average Move Quality"));
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| 175 | valuesCollector.CollectedValues.Add(new LookupParameter<DoubleValue>("Worst Move Quality"));
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| 176 | valuesCollector.DataTableParameter.ActualName = "MoveQualities";
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| 177 |
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| 178 | subScopesRemover.RemoveAllSubScopes = true;
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| 179 |
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| 180 | iterationsCounter.Name = "Iterations Counter";
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| 181 | iterationsCounter.Increment = new IntValue(1);
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| 182 | iterationsCounter.ValueParameter.ActualName = "Iterations";
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| 183 |
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| 184 | iterationsComparator.Name = "Iterations Comparator";
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| 185 | iterationsComparator.Comparison = new Comparison(ComparisonType.Less);
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| 186 | iterationsComparator.LeftSideParameter.ActualName = "Iterations";
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| 187 | iterationsComparator.RightSideParameter.ActualName = "MaximumIterations";
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| 188 | iterationsComparator.ResultParameter.ActualName = "IterationsCondition";
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| 189 |
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| 190 | iterationsTermination.Name = "Iterations Termination Condition";
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| 191 | iterationsTermination.ConditionParameter.ActualName = "IterationsCondition";
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| 192 | #endregion
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| 193 |
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| 194 | #region Create operator graph
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| 195 | OperatorGraph.InitialOperator = tabuListCreator;
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| 196 | tabuListCreator.Successor = variableCreator;
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| 197 | variableCreator.Successor = bestQualityMemorizer;
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| 198 | bestQualityMemorizer.Successor = resultsCollector;
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| 199 | resultsCollector.Successor = mainProcessor;
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| 200 | mainProcessor.Operator = moveGenerator;
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| 201 | mainProcessor.Successor = valuesCollector;
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| 202 | moveGenerator.Successor = moveEvaluationProcessor;
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| 203 | moveEvaluationProcessor.Operator = moveEvaluator;
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| 204 | moveEvaluationProcessor.Successor = moveQualitySorter;
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| 205 | moveEvaluator.Successor = tabuMoveEvaluator;
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| 206 | moveQualitySorter.Successor = bestAverageWorstMoveQualityCalculator;
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| 207 | bestAverageWorstMoveQualityCalculator.Successor = tabuSelector;
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| 208 | tabuSelector.Successor = rightReducer;
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| 209 | rightReducer.Successor = moveMakingProcessor;
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| 210 | moveMakingProcessor.Operator = tabuMoveMaker;
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| 211 | moveMakingProcessor.Successor = subScopesRemover;
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| 212 | tabuMoveMaker.Successor = moveMaker;
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| 213 | valuesCollector.Successor = iterationsCounter;
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| 214 | iterationsCounter.Successor = iterationsComparator;
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| 215 | iterationsComparator.Successor = iterationsTermination;
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| 216 | iterationsTermination.TrueBranch = bestQualityMemorizer;
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| 217 | iterationsTermination.FalseBranch = finished;
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| 218 | #endregion
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| 219 | }
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| 220 | }
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| 221 | }
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