source: branches/2457_ExpertSystem/HeuristicLab.Problems.GeneralizedQuadraticAssignment.Algorithms/3.3/Evolutionary/OSGAContext.cs

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2017 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.Linq;
using HEAL.Attic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Parameters;

namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment.Algorithms.Evolutionary {
  [Item("OSGA (GQAP) Context", "Context for OSGA (GQAP).")]
  [StorableType("65ADDF53-91A6-4C8C-9DDE-B330E87AB32B")]
  public sealed class OSGAContext : PopulationContext<ISingleObjectiveSolutionScope<GQAPSolution>> {
    
    [Storable]
    private IValueParameter<GQAP> problem;
    public GQAP Problem {
      get { return problem.Value; }
      set { problem.Value = value; }
    }

    [Storable]
    private IValueParameter<GQAPSolution> bestSolution;
    public GQAPSolution BestSolution {
      get { return bestSolution.Value; }
      set { bestSolution.Value = value; }
    }

    [Storable]
    private IValueParameter<ItemList<ISingleObjectiveSolutionScope<GQAPSolution>>> nextGeneration;
    public ItemList<ISingleObjectiveSolutionScope<GQAPSolution>> NextGeneration {
      get { return nextGeneration.Value; }
      set { nextGeneration.Value = value; }
    }

    [Storable]
    private IValueParameter<DoubleValue> selectionPressure;
    public double SelectionPressure {
      get { return selectionPressure.Value.Value; }
      set { selectionPressure.Value.Value = value; }
    }

    [Storable]
    private IValueParameter<IntValue> attempts;
    public int Attempts {
      get { return attempts.Value.Value; }
      set { attempts.Value.Value = value; }
    }

    public void SortPopulation() {
      Scope.SubScopes.Replace(Scope.SubScopes.OfType<ISingleObjectiveSolutionScope<GQAPSolution>>().OrderBy(x => Problem.Maximization ? -x.Fitness : x.Fitness).ToList());
    }
    
    [StorableConstructor]
    private OSGAContext(StorableConstructorFlag _) : base(_) { }
    private OSGAContext(OSGAContext original, Cloner cloner)
      : base(original, cloner) {
      problem = cloner.Clone(original.problem);
      bestSolution = cloner.Clone(original.bestSolution);
      nextGeneration = cloner.Clone(original.nextGeneration);
      selectionPressure = cloner.Clone(original.selectionPressure);
      attempts = cloner.Clone(original.attempts);
    }
    public OSGAContext() : this("OSGA (GQAP) Context") { }
    public OSGAContext(string name) : base(name) {
      Parameters.Add(problem = new ValueParameter<GQAP>("Problem"));
      Parameters.Add(bestSolution = new ValueParameter<GQAPSolution>("BestFoundSolution"));
      Parameters.Add(nextGeneration = new ValueParameter<ItemList<ISingleObjectiveSolutionScope<GQAPSolution>>>("NextGeneration"));
      Parameters.Add(selectionPressure = new ValueParameter<DoubleValue>("SelectionPressure", new DoubleValue(0)));
      Parameters.Add(attempts = new ValueParameter<IntValue>("Attempts", new IntValue(0)));
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new OSGAContext(this, cloner);
    }

    public ISingleObjectiveSolutionScope<GQAPSolution> ToScope(GQAPSolution code, double fitness = double.NaN) {
      var name = Problem.Encoding.Name;
      var scope = new SingleObjectiveSolutionScope<GQAPSolution>(code,
        name + "Solution", fitness, Problem.Evaluator.QualityParameter.ActualName) {
        Parent = Scope
      };
      scope.Variables.Add(new Variable(name, code.Assignment));
      scope.Variables.Add(new Variable("Evaluation", code.Evaluation));
      return scope;
    }
  }
}