source: addons/HeuristicLab.MetaOptimization/HeuristicLab.Problems.MetaOptimization/3.3/Encoding/ValueConfigurations/NullValueConfiguration.cs

using System.Collections.Generic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HEAL.Attic;

namespace HeuristicLab.Problems.MetaOptimization {
  [StorableType("0BEC2BB3-2E1C-4933-AA01-F3D10B8E19D2")]
  public class NullValueConfiguration : ValueConfiguration {
    public NullValueConfiguration()
      : base() {
      ActualValue = new ConstrainedValue(null, null, null, true);
      IsOptimizable = false;
      Name = "NullValueConfiguration";
    }
    [StorableConstructor]
    protected NullValueConfiguration(StorableConstructorFlag _) : base(_) { }
    protected NullValueConfiguration(NullValueConfiguration original, Cloner cloner)
      : base(original, cloner) {
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new NullValueConfiguration(this, cloner);
    }

    public override string ToString() {
      return "null";
    }

    public override void Randomize(IRandom random) { }

    public override void Mutate(IRandom random, MutateDelegate mutate, IIntValueManipulator intValueManipulator, IDoubleValueManipulator doubleValueManipulator) { }

    public override void Cross(IRandom random, IOptimizable other, CrossDelegate cross, IIntValueCrossover intValueCrossover, IDoubleValueCrossover doubleValueCrossover) { }

    public override double CalculateSimilarity(IOptimizable optimizable) {
      return 1.0;
    }

    public override string ParameterInfoString {
      get { return "null"; }
    }

    public override void CollectOptimizedParameterNames(List<string> parameterNames, string prefix) { }

    public override List<IOptimizable> GetAllOptimizables() {
      return new List<IOptimizable>();
    }
  }
}