#region License Information
/* HeuristicLab
* Copyright (C) 2002-2016 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 .
*/
#endregion
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence;
using HeuristicLab.Problems.VehicleRouting.Encodings;
using HeuristicLab.Problems.VehicleRouting.Interfaces;
namespace HeuristicLab.Problems.VehicleRouting.ProblemInstances {
[Item("VRPEvaluator", "Represents a VRP evaluator.")]
[StorableType("1645703c-2585-4b9f-8c3e-cc0e9738c0ac")]
public abstract class VRPEvaluator : VRPOperator, IVRPEvaluator {
public ILookupParameter VRPToursParameter {
get { return (ILookupParameter)Parameters["VRPTours"]; }
}
#region ISingleObjectiveEvaluator Members
public ILookupParameter QualityParameter {
get { return (ILookupParameter)Parameters["Quality"]; }
}
#endregion
public ILookupParameter DistanceParameter {
get { return (ILookupParameter)Parameters["Distance"]; }
}
public ILookupParameter VehcilesUtilizedParameter {
get { return (ILookupParameter)Parameters["VehiclesUtilized"]; }
}
public ILookupParameter PenaltyParameter {
get { return (ILookupParameter)Parameters["Penalty"]; }
}
[StorableConstructor]
protected VRPEvaluator(StorableConstructorFlag deserializing) : base(deserializing) { }
public VRPEvaluator() {
Parameters.Add(new LookupParameter("VRPTours", "The VRP tours which should be evaluated."));
Parameters.Add(new LookupParameter("Quality", "The evaluated quality of the VRP solution."));
Parameters.Add(new LookupParameter("Distance", "The distance."));
Parameters.Add(new LookupParameter("VehiclesUtilized", "The number of vehicles utilized."));
Parameters.Add(new LookupParameter("Penalty", "The applied penalty."));
}
protected VRPEvaluator(VRPEvaluator original, Cloner cloner)
: base(original, cloner) {
}
protected virtual VRPEvaluation CreateTourEvaluation() {
return new VRPEvaluation();
}
protected abstract void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour, IVRPEncoding solution);
protected virtual void InitResultParameters() {
QualityParameter.ActualValue = new DoubleValue(0);
VehcilesUtilizedParameter.ActualValue = new DoubleValue(0);
DistanceParameter.ActualValue = new DoubleValue(0);
PenaltyParameter.ActualValue = new DoubleValue(0);
}
protected virtual void SetResultParameters(VRPEvaluation tourEvaluation) {
QualityParameter.ActualValue.Value = tourEvaluation.Quality;
VehcilesUtilizedParameter.ActualValue.Value = tourEvaluation.VehicleUtilization;
DistanceParameter.ActualValue.Value = tourEvaluation.Distance;
PenaltyParameter.ActualValue.Value = tourEvaluation.Penalty;
}
#region IVRPEvaluator Members
public bool Feasible(VRPEvaluation evaluation) {
return evaluation.Penalty < double.Epsilon;
}
protected abstract double GetTourInsertionCosts(IVRPProblemInstance instance, IVRPEncoding solution, TourInsertionInfo tourInsertionInfo, int index, int customer, out bool feasible);
public double GetInsertionCosts(IVRPProblemInstance instance, IVRPEncoding solution, VRPEvaluation eval, int customer, int tour, int index, out bool feasible) {
bool tourFeasible;
double costs = GetTourInsertionCosts(
instance,
solution,
eval.InsertionInfo.GetTourInsertionInfo(tour),
index,
customer, out tourFeasible);
feasible = tourFeasible;
return costs;
}
public VRPEvaluation EvaluateTour(IVRPProblemInstance instance, Tour tour, IVRPEncoding solution) {
VRPEvaluation evaluation = CreateTourEvaluation();
EvaluateTour(evaluation, instance, tour, solution);
return evaluation;
}
public virtual VRPEvaluation Evaluate(IVRPProblemInstance instance, IVRPEncoding solution) {
VRPEvaluation evaluation = CreateTourEvaluation();
foreach (Tour tour in solution.GetTours()) {
EvaluateTour(evaluation, instance, tour, solution);
}
return evaluation;
}
public override IOperation InstrumentedApply() {
InitResultParameters();
VRPEvaluation evaluation = CreateTourEvaluation();
IVRPEncoding solution = VRPToursParameter.ActualValue;
foreach (Tour tour in solution.GetTours()) {
EvaluateTour(evaluation, ProblemInstance, tour, solution);
}
SetResultParameters(evaluation);
QualityParameter.ActualValue = new DoubleValue(evaluation.Quality);
return base.InstrumentedApply();
}
#endregion
}
}