#region License Information
/* HeuristicLab
* Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Optimization.Operators;
namespace HeuristicLab.Problems.QuadraticAssignment {
///
/// An operator that performs similarity calculation between two quadratic assignment solutions.
///
///
/// The operator calculates the similarity based on the number of edges the two solutions have in common.
///
[Item("QAPSimilarityCalculator", "An operator that performs similarity calculation between two quadratic assignment solutions. The operator calculates the similarity based on the number of edges the two solutions have in common.")]
public sealed class QAPSimilarityCalculator : SingleObjectiveSolutionSimilarityCalculator {
private QAPSimilarityCalculator(bool deserializing) : base(deserializing) { }
private QAPSimilarityCalculator(QAPSimilarityCalculator original, Cloner cloner) : base(original, cloner) { }
public QAPSimilarityCalculator() : base() { }
public override IDeepCloneable Clone(Cloner cloner) {
return new QAPSimilarityCalculator(this, cloner);
}
public static double CalculateSimilarity(Permutation left, Permutation right) {
if (left == null || right == null)
throw new ArgumentException("Cannot calculate similarity because one of the provided solutions or both are null.");
if (left.Length != right.Length)
throw new ArgumentException("Cannot calculate similarity because the provided solutions have different lengths.");
if (object.ReferenceEquals(left, right)) return 1.0;
return QAPPermutationProximityCalculator.CalculateGenotypeSimilarity(left, right);
}
public override double CalculateSolutionSimilarity(IScope leftSolution, IScope rightSolution) {
var sol1 = leftSolution.Variables[SolutionVariableName].Value as Permutation;
var sol2 = rightSolution.Variables[SolutionVariableName].Value as Permutation;
return CalculateSimilarity(sol1, sol2);
}
}
}