| 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.Operators;
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| 25 | using HeuristicLab.Parameters;
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| 26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 27 |
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| 28 | namespace HeuristicLab.Random {
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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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