Free cookie consent management tool by TermsFeed Policy Generator

source: trunk/sources/HeuristicLab.Selection/3.3/RandomSelector.cs @ 3160

Last change on this file since 3160 was 3160, checked in by swagner, 13 years ago

Removed Creatable test attribute (#935).

File size: 2.7 KB
Line 
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
22using System.Collections.Generic;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Optimization;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Selection {
30  /// <summary>
31  /// A random selection operator.
32  /// </summary>
33  [Item("RandomSelector", "A random selection operator.")]
34  [StorableClass]
35  public sealed class RandomSelector : StochasticSelector, ISelector {
36    protected ValueParameter<BoolValue> CopySelectedParameter {
37      get { return (ValueParameter<BoolValue>)Parameters["CopySelected"]; }
38    }
39    public IValueLookupParameter<IntValue> NumberOfSelectedSubScopesParameter {
40      get { return (ValueLookupParameter<IntValue>)Parameters["NumberOfSelectedSubScopes"]; }
41    }
42
43    public BoolValue CopySelected {
44      get { return CopySelectedParameter.Value; }
45      set { CopySelectedParameter.Value = value; }
46    }
47   
48    public RandomSelector() : base() {
49      Parameters.Add(new ValueParameter<BoolValue>("CopySelected", "True if the selected sub-scopes should be copied, otherwise false.", new BoolValue(true)));
50      Parameters.Add(new ValueLookupParameter<IntValue>("NumberOfSelectedSubScopes", "The number of sub-scopes which should be selected."));
51    }
52
53    protected override IScope[] Select(List<IScope> scopes) {
54      int count = NumberOfSelectedSubScopesParameter.ActualValue.Value;
55      bool copy = CopySelectedParameter.Value.Value;
56      IRandom random = RandomParameter.ActualValue;
57      IScope[] selected = new IScope[count];
58
59      for (int i = 0; i < count; i++) {
60        if (copy)
61          selected[i] = (IScope)scopes[random.Next(scopes.Count)].Clone();
62        else {
63          int index = random.Next(scopes.Count);
64          selected[i] = scopes[index];
65          scopes.RemoveAt(index);
66        }
67      }
68      return selected;
69    }
70  }
71}
Note: See TracBrowser for help on using the repository browser.