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source: trunk/sources/HeuristicLab.Selection/3.3/Reducer.cs @ 2895

Last change on this file since 2895 was 2882, checked in by swagner, 15 years ago

Operator architecture refactoring (#95)

  • worked on algorithms
File size: 2.1 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.Collections.Generic;
23using HeuristicLab.Core;
24using HeuristicLab.Operators;
25using HeuristicLab.Optimization;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Selection {
30  /// <summary>
31  /// A base class for reduction operators.
32  /// </summary>
33  [Item("Reducer", "A base class for reduction operators.")]
34  [EmptyStorableClass]
35  public abstract class Reducer : SingleSuccessorOperator, IReducer {
36    protected ScopeParameter CurrentScopeParameter {
37      get { return (ScopeParameter)Parameters["CurrentScope"]; }
38    }
39
40    public IScope CurrentScope {
41      get { return CurrentScopeParameter.ActualValue; }
42    }
43
44    protected Reducer()
45      : base() {
46      Parameters.Add(new ScopeParameter("CurrentScope", "The current scope from which sub-scopes should be selected."));
47    }
48
49    public sealed override IOperation Apply() {
50      List<IScope> scopes = new List<IScope>(CurrentScope.SubScopes);
51      List<IScope> reduced = Reduce(scopes);
52
53      CurrentScope.SubScopes.Clear();
54      CurrentScope.SubScopes.AddRange(reduced);
55
56      return base.Apply();
57    }
58
59    protected abstract List<IScope> Reduce(List<IScope> scopes);
60  }
61}
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