source: trunk/sources/HeuristicLab.Optimization/3.3/MoveHelper.cs @ 7259

Last change on this file since 7259 was 7259, checked in by swagner, 11 years ago

Updated year of copyrights to 2012 (#1716)

File size: 3.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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.Linq;
25using HeuristicLab.Core;
26
27namespace HeuristicLab.Optimization {
28  /// <summary>
29  /// This class provides some methods useful when dealing with moves, such as getting compatible move makers to a move generator.
30  /// Compatibility is generally ensured in that both the generator and the move maker implement the same specific interface which is derived from IMoveOperator
31  /// </summary>
32  public static class MoveHelper {
33
34    public static IEnumerable<IMoveMaker> GetCompatibleMoveMakers(IMoveGenerator generator, IEnumerable<IOperator> operators) {
35      return GetCompatibleOperators<IMoveMaker>(generator, operators);
36    }
37
38    public static IEnumerable<ISingleObjectiveMoveEvaluator> GetCompatibleSingleObjectiveMoveEvaluators(IMoveGenerator generator, IEnumerable<IOperator> operators) {
39      return GetCompatibleOperators<ISingleObjectiveMoveEvaluator>(generator, operators);
40    }
41
42    public static IEnumerable<ITabuChecker> GetCompatibleTabuChekers(IMoveGenerator generator, IEnumerable<IOperator> operators) {
43      return GetCompatibleOperators<ITabuChecker>(generator, operators);
44    }
45
46    public static IEnumerable<ITabuMaker> GetCompatibleTabuMakers(IMoveGenerator generator, IEnumerable<IOperator> operators) {
47      return GetCompatibleOperators<ITabuMaker>(generator, operators);
48    }
49
50    private static IEnumerable<T> GetCompatibleOperators<T>(IMoveGenerator generator, IEnumerable<IOperator> operators) where T : IOperator {
51      foreach (Type type in GetMostSpecificMoveOperatorTypes(generator)) {
52        foreach (T op in operators.Where(x => type.IsAssignableFrom(x.GetType())).OfType<T>())
53          yield return op;
54      }
55    }
56
57    private static List<Type> GetMostSpecificMoveOperatorTypes(IMoveGenerator generator) {
58      List<Type> moveTypes = generator.GetType().GetInterfaces().Where(x => typeof(IMoveOperator).IsAssignableFrom(x)).ToList();
59      foreach (Type type in moveTypes.ToList()) {
60        if (moveTypes.Any(t => t != type && type.IsAssignableFrom(t)))
61          moveTypes.Remove(type);
62      }
63      return moveTypes;
64    }
65  }
66}
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