source: branches/gp-algorithms-refactoring-#720/sources/HeuristicLab.GP.StructureIdentification/3.3/OffspringSelectionGP.cs @ 2335

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Evolutionary;
using HeuristicLab.Logging;
using HeuristicLab.Operators;
using HeuristicLab.Selection;
using HeuristicLab.Selection.OffspringSelection;
using HeuristicLab.Modeling;

namespace HeuristicLab.GP.StructureIdentification {
  public class OffspringSelectionGP : HeuristicLab.GP.Algorithms.OffspringSelectionGP {
    public override string Name { get { return "OffspringSelectionGP - StructureIdentification"; } }

    public virtual double PunishmentFactor {
      get { return GetVariableInjector().GetVariable("PunishmentFactor").GetValue<DoubleData>().Data; }
      set { GetVariableInjector().GetVariable("PunishmentFactor").GetValue<DoubleData>().Data = value; }
    }

    public OffspringSelectionGP()
      : base() {
      PunishmentFactor = 10.0;
    }

    protected override IOperator CreateFunctionLibraryInjector() {
      CombinedOperator op = new CombinedOperator();
      op.Name = "FunctionLibraryInjector";
      SequentialProcessor seq = new SequentialProcessor();     
      seq.AddSubOperator(new FunctionLibraryInjector());
      seq.AddSubOperator(new HL2TreeEvaluatorInjector());
      op.OperatorGraph.AddOperator(seq);
      op.OperatorGraph.InitialOperator = seq;
      return op;
    }

    protected override IOperator CreateProblemInjector() {
      return new ProblemInjector();
    }

    protected override IOperator CreateInitialPopulationEvaluator() {
      MeanSquaredErrorEvaluator eval = new MeanSquaredErrorEvaluator();
      eval.Name = "Evaluator";
      eval.GetVariableInfo("MSE").ActualName = "Quality";
      eval.GetVariableInfo("SamplesStart").ActualName = "ActualTrainingSamplesStart";
      eval.GetVariableInfo("SamplesEnd").ActualName = "ActualTrainingSamplesEnd";
      return eval;
    }

    protected override IOperator CreateEvaluationOperator() {
      return CreateInitialPopulationEvaluator();
    }


    protected override IOperator CreateGenerationStepHook() {
      CombinedOperator op = new CombinedOperator();
      SequentialProcessor seq = new SequentialProcessor();
      UniformSequentialSubScopesProcessor subScopesProc = new UniformSequentialSubScopesProcessor();
      SequentialProcessor individualProc = new SequentialProcessor();
      MeanSquaredErrorEvaluator validationEvaluator = new MeanSquaredErrorEvaluator();
      validationEvaluator.Name = "ValidationEvaluator";
      validationEvaluator.GetVariableInfo("MSE").ActualName = "ValidationQuality";
      validationEvaluator.GetVariableInfo("SamplesStart").ActualName = "ValidationSamplesStart";
      validationEvaluator.GetVariableInfo("SamplesEnd").ActualName = "ValidationSamplesEnd";

      individualProc.AddSubOperator(validationEvaluator);

      BestSolutionStorer solutionStorer = new BestSolutionStorer();
      solutionStorer.GetVariableInfo("BestSolution").ActualName = "BestValidationSolution";
      solutionStorer.GetVariableInfo("Quality").ActualName = "ValidationQuality";

      BestAverageWorstQualityCalculator validationQualityCalculator = new BestAverageWorstQualityCalculator();
      validationQualityCalculator.Name = "BestAverageWorstValidationQualityCalculator";
      validationQualityCalculator.GetVariableInfo("Quality").ActualName = "ValidationQuality";
      validationQualityCalculator.GetVariableInfo("BestQuality").ActualName = "BestValidationQuality";
      validationQualityCalculator.GetVariableInfo("AverageQuality").ActualName = "AverageValidationQuality";
      validationQualityCalculator.GetVariableInfo("WorstQuality").ActualName = "WorstValidationQuality";

      subScopesProc.AddSubOperator(individualProc);

      seq.AddSubOperator(subScopesProc);
      seq.AddSubOperator(solutionStorer);
      seq.AddSubOperator(validationQualityCalculator);

      op.OperatorGraph.AddOperator(seq);
      op.OperatorGraph.InitialOperator = seq;
      return op;
    }

    protected override VariableInjector CreateGlobalInjector() {
      VariableInjector injector = base.CreateGlobalInjector();
      injector.AddVariable(new HeuristicLab.Core.Variable("UseEstimatedTargetValue", new BoolData()));
      injector.AddVariable(new HeuristicLab.Core.Variable("PunishmentFactor", new DoubleData()));
      return injector;
    }

    protected override IOperator CreateLoggingOperator() {
      CombinedOperator loggingOperator = new CombinedOperator();
      loggingOperator.Name = "Logging";
      SequentialProcessor seq = new SequentialProcessor();

      DataCollector collector = new DataCollector();
      ItemList<StringData> names = collector.GetVariable("VariableNames").GetValue<ItemList<StringData>>();
      names.Add(new StringData("BestQuality"));
      names.Add(new StringData("AverageQuality"));
      names.Add(new StringData("WorstQuality"));
      names.Add(new StringData("BestValidationQuality"));
      names.Add(new StringData("AverageValidationQuality"));
      names.Add(new StringData("WorstValidationQuality"));
      names.Add(new StringData("EvaluatedSolutions"));
      names.Add(new StringData("SelectionPressure"));
      QualityLogger qualityLogger = new QualityLogger();
      QualityLogger validationQualityLogger = new QualityLogger();
      validationQualityLogger.GetVariableInfo("Quality").ActualName = "ValidationQuality";
      validationQualityLogger.GetVariableInfo("QualityLog").ActualName = "ValidationQualityLog";
      seq.AddSubOperator(collector);
      seq.AddSubOperator(qualityLogger);
      seq.AddSubOperator(validationQualityLogger);

      loggingOperator.OperatorGraph.AddOperator(seq);
      loggingOperator.OperatorGraph.InitialOperator = seq;
      return loggingOperator;
    }

    public override object Clone(IDictionary<Guid, object> clonedObjects) {
      OffspringSelectionGP clone = (OffspringSelectionGP)base.Clone(clonedObjects);
      clone.PunishmentFactor = PunishmentFactor;
      return clone;
    }
  }
}