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source: trunk/sources/HeuristicLab.Operators/3.3/StochasticBranch.cs @ 15582

Last change on this file since 15582 was 14185, checked in by swagner, 8 years ago

#2526: Updated year of copyrights in license headers

File size: 3.5 KB
RevLine 
[2]1#region License Information
2/* HeuristicLab
[14185]3 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[2]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
[4722]22using HeuristicLab.Common;
[2]23using HeuristicLab.Core;
24using HeuristicLab.Data;
[2773]25using HeuristicLab.Parameters;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
[2]27
28namespace HeuristicLab.Operators {
[801]29  /// <summary>
[2773]30  /// A branch of two operators which are executed with a specified probability.
[801]31  /// </summary>
[2773]32  [Item("StochasticBranch", "A branch of two operators which are executed with a specified probability.")]
[3017]33  [StorableClass]
[2773]34  public class StochasticBranch : SingleSuccessorOperator {
35    public LookupParameter<IRandom> RandomParameter {
36      get { return (LookupParameter<IRandom>)Parameters["Random"]; }
[2]37    }
[3048]38    public ValueLookupParameter<DoubleValue> ProbabilityParameter {
39      get { return (ValueLookupParameter<DoubleValue>)Parameters["Probability"]; }
[2773]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    }
[2]55
[4722]56    [StorableConstructor]
57    protected StochasticBranch(bool deserializing) : base(deserializing) { }
58    protected StochasticBranch(StochasticBranch original, Cloner cloner)
59      : base(original, cloner) {
60    }
[2]61    public StochasticBranch()
62      : base() {
[2773]63      Parameters.Add(new LookupParameter<IRandom>("Random", "A pseudo random number generator."));
[3048]64      Parameters.Add(new ValueLookupParameter<DoubleValue>("Probability", "The probability to execute the first branch."));
[2773]65      Parameters.Add(new OperatorParameter("FirstBranch", "The operator which is executed with the given probability."));
66      Parameters.Add(new OperatorParameter("SecondBranch", "The operator which is executed if the first branch is not executed."));
[2]67    }
68
[4722]69    public override IDeepCloneable Clone(Cloner cloner) {
70      return new StochasticBranch(this, cloner);
71    }
72
[2834]73    public override IOperation Apply() {
74      OperationCollection next = new OperationCollection(base.Apply());
[2773]75      if (RandomParameter.ActualValue.NextDouble() < ProbabilityParameter.ActualValue.Value) {
[2834]76        if (FirstBranch != null) next.Insert(0, ExecutionContext.CreateOperation(FirstBranch));
[2773]77      } else {
[2834]78        if (SecondBranch != null) next.Insert(0, ExecutionContext.CreateOperation(SecondBranch));
[2773]79      }
80      return next;
[2]81    }
82  }
83}
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