1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 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.Core;
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23 | using HeuristicLab.Data;
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24 | using HeuristicLab.Parameters;
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25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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26 | using HeuristicLab.Random;
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27 |
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28 | namespace HeuristicLab.Operators {
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29 | /// <summary>
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30 | /// An operator which creates a new Mersenne Twister pseudo random number generator.
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31 | /// </summary>
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32 | [Item("RandomCreator", "An operator which creates a new Mersenne Twister pseudo random number generator.")]
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33 | [StorableClass]
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34 | public sealed class RandomCreator : SingleSuccessorOperator {
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35 | public ValueLookupParameter<BoolValue> SetSeedRandomlyParameter {
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36 | get { return (ValueLookupParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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37 | }
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38 | public ValueLookupParameter<IntValue> SeedParameter {
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39 | get { return (ValueLookupParameter<IntValue>)Parameters["Seed"]; }
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40 | }
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41 | public LookupParameter<IRandom> RandomParameter {
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42 | get { return (LookupParameter<IRandom>)Parameters["Random"]; }
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43 | }
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44 | public BoolValue SetSeedRandomly {
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45 | get { return SetSeedRandomlyParameter.Value; }
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46 | set { SetSeedRandomlyParameter.Value = value; }
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47 | }
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48 | public IntValue Seed {
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49 | get { return SeedParameter.Value; }
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50 | set { SeedParameter.Value = value; }
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51 | }
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52 |
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53 | public RandomCreator()
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54 | : base() {
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55 | Parameters.Add(new ValueLookupParameter<BoolValue>("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
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56 | Parameters.Add(new ValueLookupParameter<IntValue>("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
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57 | Parameters.Add(new LookupParameter<IRandom>("Random", "The new pseudo random number generator which is initialized with the given seed."));
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58 | }
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59 |
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60 | public override IOperation Apply() {
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61 | if (SetSeedRandomlyParameter.ActualValue == null) SetSeedRandomlyParameter.ActualValue = new BoolValue(true);
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62 | bool setSeedRandomly = SetSeedRandomlyParameter.ActualValue.Value;
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63 | if (SeedParameter.ActualValue == null) SeedParameter.ActualValue = new IntValue(0);
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64 | IntValue seed = SeedParameter.ActualValue;
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65 |
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66 | if (setSeedRandomly) seed.Value = new System.Random().Next();
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67 | RandomParameter.ActualValue = new MersenneTwister((uint)seed.Value);
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68 |
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69 | return base.Apply();
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70 | }
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71 | }
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72 | }
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