source: trunk/sources/HeuristicLab.Optimization.Operators/3.3/SingleObjectiveSolutionSimilarityCalculator.cs @ 12085

Last change on this file since 12085 was 12085, checked in by bburlacu, 7 years ago

#2332: Move SolutionVariableName and QualityVariableName properties to ISolutionSimilarityCalculator, implement Equals and GetHashCode in the SolutionSimilarityCalculator

File size: 2.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Optimization.Operators {
28  /// <summary>
29  /// A base class for items that perform similarity calculation between two single objective solutions.
30  /// </summary>
31  [Item("SimilarityCalculator", "A base class for items that perform similarity calculation between two solutions.")]
32  [StorableClass]
33  public abstract class SingleObjectiveSolutionSimilarityCalculator : SolutionSimilarityCalculator, ISingleObjectiveSolutionSimilarityCalculator {
34    [StorableConstructor]
35    protected SingleObjectiveSolutionSimilarityCalculator(bool deserializing) : base(deserializing) { }
36    protected SingleObjectiveSolutionSimilarityCalculator(SingleObjectiveSolutionSimilarityCalculator original, Cloner cloner)
37      : base(original, cloner) {
38
39    }
40    protected SingleObjectiveSolutionSimilarityCalculator() : base() { }
41
42    public override bool Equals(IScope x, IScope y) {
43      if (object.ReferenceEquals(x, y)) return true;
44      if (x == null || y == null) return false;
45      double q1 = ((DoubleValue)x.Variables[QualityVariableName].Value).Value;
46      double q2 = ((DoubleValue)y.Variables[QualityVariableName].Value).Value;
47      return q1.IsAlmost(q2) && CalculateSolutionSimilarity(x, y).IsAlmost(1.0);
48    }
49
50    public override int GetHashCode(IScope scope) {
51      return ((DoubleValue)scope.Variables[QualityVariableName].Value).Value.GetHashCode();
52    }
53  }
54}
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