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source: branches/3.1/sources/HeuristicLab.Permutation/PermutationCrossoverBase.cs @ 3508

Last change on this file since 3508 was 77, checked in by swagner, 17 years ago

Fixed ticket #67

  • adapted accessing of variables in operators due to changes of variable lookup and the new name aliasing mechanism (actual/formal name translations should not be done directly anymore; instead the new method Scope.TranslateName should be used)
File size: 2.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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 System.Collections.Generic;
24using System.Text;
25using HeuristicLab.Core;
26using HeuristicLab.Evolutionary;
27
28namespace HeuristicLab.Permutation {
29  public abstract class PermutationCrossoverBase : CrossoverBase {
30    public PermutationCrossoverBase()
31      : base() {
32      AddVariableInfo(new VariableInfo("Permutation", "Parent and child permutations", typeof(Permutation), VariableKind.In | VariableKind.New));
33    }
34
35    protected sealed override void Cross(IScope scope, IRandom random, IScope parent1, IScope parent2, IScope child) {
36      Permutation perm1 = parent1.GetVariableValue<Permutation>("Permutation", false);
37      Permutation perm2 = parent2.GetVariableValue<Permutation>("Permutation", false);
38
39      if (perm1.Data.Length != perm2.Data.Length) throw new InvalidOperationException("Cannot apply crossover to permutations of different length.");
40
41      int[] result = Cross(scope, random, perm1.Data, perm2.Data);
42      child.AddVariable(new Variable(scope.TranslateName("Permutation"), new Permutation(result)));
43    }
44
45    protected abstract int[] Cross(IScope scope, IRandom random, int[] parent1, int[] parent2);
46  }
47}
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