1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System.Linq;
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23 | using HeuristicLab.Core;
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24 | using HeuristicLab.Data;
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25 | using HeuristicLab.Operators;
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26 | using HeuristicLab.Parameters;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 |
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29 | namespace HeuristicLab.Problems.VehicleRouting {
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30 | [Item("BestVRPToursMemorizer", "An operator that updates the best VRP tour found so far in the scope three.")]
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31 | [StorableClass]
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32 | public class BestVRPToursMemorizer : SingleSuccessorOperator {
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33 | public ScopeTreeLookupParameter<DoubleValue> DistanceParameter {
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34 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Distance"]; }
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35 | }
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36 | public ScopeTreeLookupParameter<DoubleValue> VehiclesUtilizedParameter {
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37 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["VehiclesUtilized"]; }
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38 | }
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39 |
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40 | public ValueLookupParameter<DoubleValue> BestDistanceParameter {
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41 | get { return (ValueLookupParameter<DoubleValue>)Parameters["BestDistance"]; }
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42 | }
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43 | public ValueLookupParameter<DoubleValue> BestVehiclesUtilizedParameter {
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44 | get { return (ValueLookupParameter<DoubleValue>)Parameters["BestVehiclesUtilized"]; }
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45 | }
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46 |
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47 | public BestVRPToursMemorizer()
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48 | : base() {
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49 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Distance", "The distances of the VRP solutions which should be analyzed."));
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50 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("VehiclesUtilized", "The utilized vehicles of the VRP solutions which should be analyzed."));
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51 |
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52 | Parameters.Add(new ValueLookupParameter<DoubleValue>("BestDistance", "The best distance found so far."));
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53 | Parameters.Add(new ValueLookupParameter<DoubleValue>("BestVehiclesUtilized", "The best vehicles utilized found so far."));
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54 |
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55 | }
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56 |
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57 | public override IOperation Apply() {
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58 | int i = DistanceParameter.ActualValue.Select((x, index) => new { index, x.Value }).OrderBy(x => x.Value).First().index;
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59 | if (BestDistanceParameter.ActualValue == null)
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60 | BestDistanceParameter.ActualValue = new DoubleValue(DistanceParameter.ActualValue[i].Value);
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61 | else if (DistanceParameter.ActualValue[i].Value <= BestDistanceParameter.ActualValue.Value)
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62 | BestDistanceParameter.ActualValue.Value = DistanceParameter.ActualValue[i].Value;
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63 |
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64 | i = VehiclesUtilizedParameter.ActualValue.Select((x, index) => new { index, x.Value }).OrderBy(x => x.Value).First().index;
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65 | if (BestVehiclesUtilizedParameter.ActualValue == null)
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66 | BestVehiclesUtilizedParameter.ActualValue = new DoubleValue(VehiclesUtilizedParameter.ActualValue[i].Value);
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67 | else if (VehiclesUtilizedParameter.ActualValue[i].Value <= BestVehiclesUtilizedParameter.ActualValue.Value)
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68 | BestVehiclesUtilizedParameter.ActualValue.Value = VehiclesUtilizedParameter.ActualValue[i].Value;
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69 |
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70 | return base.Apply();
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71 | }
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72 | }
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73 | }
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