| 1 | #region License Information
|
|---|
| 2 | /* HeuristicLab
|
|---|
| 3 | * Copyright (C) 2002-2010 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 |
|
|---|
| 22 | using HeuristicLab.Core;
|
|---|
| 23 | using HeuristicLab.Data;
|
|---|
| 24 | using HeuristicLab.Parameters;
|
|---|
| 25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
|
|---|
| 26 |
|
|---|
| 27 | namespace HeuristicLab.Operators {
|
|---|
| 28 | /// <summary>
|
|---|
| 29 | /// A branch of two operators which are executed with a specified probability.
|
|---|
| 30 | /// </summary>
|
|---|
| 31 | [Item("StochasticBranch", "A branch of two operators which are executed with a specified probability.")]
|
|---|
| 32 | [Creatable("Test")]
|
|---|
| 33 | [EmptyStorableClass]
|
|---|
| 34 | public class StochasticBranch : SingleSuccessorOperator {
|
|---|
| 35 | public LookupParameter<IRandom> RandomParameter {
|
|---|
| 36 | get { return (LookupParameter<IRandom>)Parameters["Random"]; }
|
|---|
| 37 | }
|
|---|
| 38 | public ValueLookupParameter<DoubleData> ProbabilityParameter {
|
|---|
| 39 | get { return (ValueLookupParameter<DoubleData>)Parameters["Probability"]; }
|
|---|
| 40 | }
|
|---|
| 41 | protected OperatorParameter FirstBranchParameter {
|
|---|
| 42 | get { return (OperatorParameter)Parameters["FirstBranch"]; }
|
|---|
| 43 | }
|
|---|
| 44 | protected OperatorParameter SecondBranchParameter {
|
|---|
| 45 | get { return (OperatorParameter)Parameters["SecondBranch"]; }
|
|---|
| 46 | }
|
|---|
| 47 | public IOperator FirstBranch {
|
|---|
| 48 | get { return FirstBranchParameter.Value; }
|
|---|
| 49 | set { FirstBranchParameter.Value = value; }
|
|---|
| 50 | }
|
|---|
| 51 | public IOperator SecondBranch {
|
|---|
| 52 | get { return SecondBranchParameter.Value; }
|
|---|
| 53 | set { SecondBranchParameter.Value = value; }
|
|---|
| 54 | }
|
|---|
| 55 |
|
|---|
| 56 | public StochasticBranch()
|
|---|
| 57 | : base() {
|
|---|
| 58 | Parameters.Add(new LookupParameter<IRandom>("Random", "A pseudo random number generator."));
|
|---|
| 59 | Parameters.Add(new ValueLookupParameter<DoubleData>("Probability", "The probability to execute the first branch."));
|
|---|
| 60 | Parameters.Add(new OperatorParameter("FirstBranch", "The operator which is executed with the given probability."));
|
|---|
| 61 | Parameters.Add(new OperatorParameter("SecondBranch", "The operator which is executed if the first branch is not executed."));
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | public override IExecutionSequence Apply() {
|
|---|
| 65 | ExecutionContextCollection next = new ExecutionContextCollection(base.Apply());
|
|---|
| 66 | if (RandomParameter.ActualValue.NextDouble() < ProbabilityParameter.ActualValue.Value) {
|
|---|
| 67 | if (FirstBranch != null) next.Insert(0, ExecutionContext.CreateContext(FirstBranch));
|
|---|
| 68 | } else {
|
|---|
| 69 | if (SecondBranch != null) next.Insert(0, ExecutionContext.CreateContext(SecondBranch));
|
|---|
| 70 | }
|
|---|
| 71 | return next;
|
|---|
| 72 | }
|
|---|
| 73 | }
|
|---|
| 74 | }
|
|---|
