source: trunk/sources/HeuristicLab.Encodings.PermutationEncoding/3.3/Crossovers/MultiPermutationCrossover.cs @ 3425

Last change on this file since 3425 was 3425, checked in by abeham, 12 years ago

Changed MultiCrossover to StochasticMultiOperator
Derived StochasticMultiBranch from StochasticMultiOperator
Derived encoding specific mutation/crossover operators from StochasticMultiOperator
#976

File size: 3.7 KB
Line 
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.Linq;
23using HeuristicLab.Collections;
24using HeuristicLab.Core;
25using HeuristicLab.Operators;
26using HeuristicLab.Optimization;
27using HeuristicLab.Parameters;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29
30namespace HeuristicLab.Encodings.PermutationEncoding {
31  [Item("MultiPermutationCrossover", "Randomly selects and applies one of its crossovers every time it is called.")]
32  [StorableClass]
33  public class MultiPermutationCrossover : StochasticMultiOperator<IPermutationCrossover>, IPermutationCrossover {
34    public override bool CanChangeName {
35      get { return false; }
36    }
37    protected override bool CreateChildOperation {
38      get { return true; }
39    }
40    public override bool AutomaticTypeDiscovery {
41      get { return true; }
42    }
43
44    public ILookupParameter<ItemArray<Permutation>> ParentsParameter {
45      get { return (ILookupParameter<ItemArray<Permutation>>)Parameters["Parents"]; }
46    }
47
48    public ILookupParameter<Permutation> ChildParameter {
49      get { return (ILookupParameter<Permutation>)Parameters["Child"]; }
50    }
51
52    [StorableConstructor]
53    private MultiPermutationCrossover(bool deserializing) : base(deserializing) { }
54    public MultiPermutationCrossover()
55      : base() {
56      Parameters.Add(new SubScopesLookupParameter<Permutation>("Parents", "The parent permutations which should be crossed."));
57      ParentsParameter.ActualName = "Permutation";
58      Parameters.Add(new LookupParameter<Permutation>("Child", "The child permutation resulting from the crossover."));
59      ChildParameter.ActualName = "Permutation";
60
61      Initialize();
62      ParameterizeCrossovers();
63    }
64
65    [StorableHook(HookType.AfterDeserialization)]
66    private void Initialize() {
67      Operators.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<IPermutationCrossover>>(Operators_ItemsAdded);
68      Operators.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<IPermutationCrossover>>(Operators_ItemsReplaced);
69    }
70
71    private void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<IPermutationCrossover>> e) {
72      ParameterizeCrossovers();
73    }
74
75    private void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<IPermutationCrossover>> e) {
76      ParameterizeCrossovers();
77    }
78
79    private void ParameterizeCrossovers() {
80      foreach (IPermutationCrossover crossover in Operators.OfType<IPermutationCrossover>()) {
81        crossover.ChildParameter.ActualName = ChildParameter.Name;
82        crossover.ParentsParameter.ActualName = ParentsParameter.Name;
83      }
84      foreach (IStochasticOperator crossover in Operators.OfType<IStochasticOperator>()) {
85        crossover.RandomParameter.ActualName = RandomParameter.Name;
86      }
87    }
88  }
89}
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