[14429] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using HeuristicLab.Common;
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| 23 | using HeuristicLab.Core;
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| 24 | using HeuristicLab.Data;
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| 25 | using HeuristicLab.Optimization;
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| 26 | using HeuristicLab.Parameters;
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| 27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 28 |
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| 29 | namespace HeuristicLab.Encodings.BinaryVectorEncoding {
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| 30 | [Item("Multi Bitflip Manipulator", "", ExcludeGenericTypeInfo = true)]
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| 31 | [StorableClass]
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| 32 | public sealed class MultiBitflipManipulator<TContext> : BitflipManipulator<TContext>
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| 33 | where TContext : ISingleObjectiveSolutionContext<BinaryVector>, IStochasticContext {
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| 34 |
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| 35 | private IValueParameter<PercentValue> RatePerBitParameter {
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| 36 | get { return (IValueParameter<PercentValue>)Parameters["RatePerBit"]; }
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| 37 | }
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| 38 |
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| 39 | public double RatePerBit {
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| 40 | get { return RatePerBitParameter.Value.Value; }
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| 41 | set { RatePerBitParameter.Value.Value = value; }
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| 42 | }
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| 43 |
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| 44 | [StorableConstructor]
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| 45 | private MultiBitflipManipulator(bool deserializing) : base(deserializing) { }
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| 46 | private MultiBitflipManipulator(MultiBitflipManipulator<TContext> original, Cloner cloner)
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| 47 | : base(original, cloner) { }
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| 48 | public MultiBitflipManipulator() {
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| 49 | Parameters.Add(new ValueParameter<PercentValue>("RatePerBit", "The probability of mutating each bit (independent of each other).", new PercentValue(0.05)));
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| 50 | }
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| 51 |
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| 52 | public override IDeepCloneable Clone(Cloner cloner) {
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| 53 | return new MultiBitflipManipulator<TContext>(this, cloner);
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| 54 | }
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| 55 |
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| 56 | public override void Manipulate(TContext context) {
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| 57 | var len = context.Solution.Solution.Length;
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| 58 | var rate = RatePerBit;
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| 59 |
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| 60 | for (var idx = 0; idx < len; idx++)
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| 61 | if (context.Random.NextDouble() < rate)
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| 62 | context.Solution.Solution[idx] = !context.Solution.Solution[idx];
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| 63 | }
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| 64 | }
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| 65 | }
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