1  #region License Information


2  /* HeuristicLab


3  * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)


4  *


5  * This file is part of HeuristicLab.


6  *


7  * HeuristicLab is free software: you can redistribute it and/or modify


8  * it under the terms of the GNU General Public License as published by


9  * the Free Software Foundation, either version 3 of the License, or


10  * (at your option) any later version.


11  *


12  * HeuristicLab is distributed in the hope that it will be useful,


13  * but WITHOUT ANY WARRANTY; without even the implied warranty of


14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the


15  * GNU General Public License for more details.


16  *


17  * You should have received a copy of the GNU General Public License


18  * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.


19  */


20  #endregion


21 


22  using System;


23  using HeuristicLab.Common;


24  using HeuristicLab.Core;


25  using HeuristicLab.Data;


26  using HeuristicLab.Encodings.ScheduleEncoding;


27  using HeuristicLab.Operators;


28  using HeuristicLab.Optimization;


29  using HeuristicLab.Parameters;


30  using HEAL.Attic;


31 


32  namespace HeuristicLab.Problems.Scheduling {


33  [Item("SchedulingEvaluator", "First applies the decoder operator to obtain a schedule from an encoding and then applies the evaluator to obtain a quality.")]


34  [StorableType("A7AED7B7C4314E39A0028CBCA6223BCD")]


35  public class SchedulingEvaluator : InstrumentedOperator, ISchedulingEvaluator, IStochasticOperator {


36 


37  public IValueLookupParameter<IScheduleDecoder> ScheduleDecoderParameter {


38  get { return (IValueLookupParameter<IScheduleDecoder>)Parameters["ScheduleDecoder"]; }


39  }


40  ILookupParameter<IScheduleDecoder> ISchedulingEvaluator.ScheduleDecoderParameter {


41  get { return ScheduleDecoderParameter; }


42  }


43  public IValueLookupParameter<IScheduleEvaluator> ScheduleEvaluatorParameter {


44  get { return (IValueLookupParameter<IScheduleEvaluator>)Parameters["ScheduleEvaluator"]; }


45  }


46  ILookupParameter<IScheduleEvaluator> ISchedulingEvaluator.ScheduleEvaluatorParameter {


47  get { return ScheduleEvaluatorParameter; }


48  }


49  public ILookupParameter<DoubleValue> QualityParameter {


50  get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }


51  }


52  // ABE: This parameter exists purely, because some IScheduleDecoders are stochastic...


53  // ... which could be solved by letting the algorithm parameterize them ...


54  // ... but they have to use the same RNG as the evaluator (due to parallel execution)...


55  // ... in particular relevant for IslandGA and ALPS (Local vs GlobalRandom).


56  public ILookupParameter<IRandom> RandomParameter {


57  get { return (ILookupParameter<IRandom>)Parameters["Random"]; }


58  }


59 


60  [StorableConstructor]


61  protected SchedulingEvaluator(StorableConstructorFlag _) : base(_) { }


62  protected SchedulingEvaluator(SchedulingEvaluator original, Cloner cloner) : base(original, cloner) { }


63  public SchedulingEvaluator()


64  : base() {


65  Parameters.Add(new ValueLookupParameter<IScheduleDecoder>("ScheduleDecoder", "The decoding operator that is used to calculate a schedule from the used representation."));


66  Parameters.Add(new ValueLookupParameter<IScheduleEvaluator>("ScheduleEvaluator", "The actual schedule evaluation operator."));


67  Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The quality value aka fitness value of the solution."));


68  Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));


69  QualityParameter.Hidden = true;


70  }


71 


72  public override IDeepCloneable Clone(Cloner cloner) {


73  return new SchedulingEvaluator(this, cloner);


74  }


75 


76  [StorableHook(HookType.AfterDeserialization)]


77  private void AfterDeserialization() {


78  // BackwardsCompatibility3.3


79  #region Backwards compatible code, remove with 3.4


80  if (!Parameters.ContainsKey("Random")) {


81  Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));


82  }


83  #endregion


84  }


85 


86  public override IOperation InstrumentedApply() {


87  var decoder = ScheduleDecoderParameter.ActualValue;


88  var evaluator = ScheduleEvaluatorParameter.ActualValue;


89  if (evaluator == null) throw new InvalidOperationException("A ScheduleEvaluator could not be found.");


90 


91  var operations = new OperationCollection(base.InstrumentedApply());


92  operations.Insert(0, ExecutionContext.CreateChildOperation(evaluator));


93  if (decoder != null) // decode before evaluating


94  operations.Insert(0, ExecutionContext.CreateChildOperation(decoder));


95  return operations;


96  }


97  }


98  }

