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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Alba/Moves/LambdaInterchange/AlbaStochasticLambdaInterchangeMutliMoveGenerator.cs @ 5867

Last change on this file since 5867 was 5867, checked in by svonolfe, 13 years ago

Merged changes from trunk into branch (#1177)

File size: 3.4 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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
22using System;
23using HeuristicLab.Core;
24using HeuristicLab.Optimization;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
27using HeuristicLab.Parameters;
28using System.Collections.Generic;
29using HeuristicLab.Data;
30using HeuristicLab.Problems.VehicleRouting.Interfaces;
31using HeuristicLab.Common;
32using HeuristicLab.Problems.VehicleRouting.Encodings.General;
33
34namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
35  [Item("AlbaStochasticLambdaInterchangeMultiMoveGenerator", "Generates multiple random lambda interchange moves from a given VRP encoding.  It is implemented as described in Alba, E. and Dorronsoro, B. (2004). Solving the Vehicle Routing Problem by Using Cellular Genetic Algorithms.")]
36  [StorableClass]
37  public sealed class AlbaStochasticLambdaInterchangeMultiMoveGenerator : AlbaLambdaInterchangeMoveGenerator, IStochasticOperator,
38    IMultiMoveGenerator, IAlbaLambdaInterchangeMoveOperator, IMultiVRPMoveGenerator {
39    public ILookupParameter<IRandom> RandomParameter {
40      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
41    }
42
43    public IValueLookupParameter<IntValue> SampleSizeParameter {
44      get { return (IValueLookupParameter<IntValue>)Parameters["SampleSize"]; }
45    }
46   
47    [StorableConstructor]
48    private AlbaStochasticLambdaInterchangeMultiMoveGenerator(bool deserializing) : base(deserializing) { }
49
50    public AlbaStochasticLambdaInterchangeMultiMoveGenerator()
51      : base() {
52        Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
53        Parameters.Add(new ValueLookupParameter<IntValue>("SampleSize", "The number of moves to generate."));
54    }
55
56    public override IDeepCloneable Clone(Cloner cloner) {
57      return new AlbaStochasticLambdaInterchangeMultiMoveGenerator(this, cloner);
58    }
59
60    private AlbaStochasticLambdaInterchangeMultiMoveGenerator(AlbaStochasticLambdaInterchangeMultiMoveGenerator original, Cloner cloner)
61      : base(original, cloner) {
62    }
63
64    protected override AlbaLambdaInterchangeMove[] GenerateMoves(AlbaEncoding individual, IVRPProblemInstance problemInstance, int lambda) {
65      int sampleSize = SampleSizeParameter.ActualValue.Value;
66
67      AlbaLambdaInterchangeMove[] moves = new AlbaLambdaInterchangeMove[sampleSize];
68      for (int i = 0; i < sampleSize; i++) {
69        moves[i] = AlbaStochasticLambdaInterchangeSingleMoveGenerator.Apply(
70          individual, problemInstance.Cities.Value, lambda, RandomParameter.ActualValue);
71      }
72
73      return moves;
74    }
75  }
76}
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