#region License Information
/* HeuristicLab
* Copyright (C) 2002-2010 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.Core;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Data;
using System.Collections.Generic;
namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
[Item("Potvin1MMainpulator", "The one-level exchange operator which manipulates a Potvin VRP representation. It is implemented as described in Potvin, J.-Y. and Bengio, S. (1996). The Vehicle Routing Problem with Time Windows - Part II: Genetic Search. INFORMS Journal of Computing, 8:165–172.")]
[StorableClass]
public sealed class Potvin1MMainpulator : PotvinManipulator {
protected override void Manipulate(IRandom random, PotvinEncoding individual) {
int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
Tour route1 =
individual.Tours[selectedIndex];
List replaced = new List();
for (int i = 0; i < route1.Cities.Count; i++) {
int insertedRoute, insertedPlace;
if (FindInsertionPlace(individual, route1.Cities[i], selectedIndex, out insertedRoute, out insertedPlace)) {
individual.Tours[insertedRoute].Cities.Insert(insertedPlace, route1.Cities[i]);
replaced.Add(route1.Cities[i]);
}
}
route1.Cities.RemoveAll(
new System.Predicate(
delegate(int val) {
return (replaced.Contains(val));
}
)
);
if (route1.Cities.Count == 0)
individual.Tours.Remove(route1);
}
}
}