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source: trunk/sources/HeuristicLab.Selection/3.3/RandomSelector.cs @ 6451

Last change on this file since 6451 was 6051, checked in by swagner, 14 years ago

Changed some more parameters to be hidden per default and corrected wrong layout in some parameter views (#1377)

File size: 3.1 KB
RevLine 
[2]1#region License Information
2/* HeuristicLab
[5445]3 * Copyright (C) 2002-2011 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
[2830]22using System.Collections.Generic;
[4722]23using HeuristicLab.Common;
[2]24using HeuristicLab.Core;
[3129]25using HeuristicLab.Data;
26using HeuristicLab.Optimization;
27using HeuristicLab.Parameters;
[2805]28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
[2]29
30namespace HeuristicLab.Selection {
[817]31  /// <summary>
[2805]32  /// A random selection operator.
[817]33  /// </summary>
[2805]34  [Item("RandomSelector", "A random selection operator.")]
[3017]35  [StorableClass]
[3129]36  public sealed class RandomSelector : StochasticSelector, ISelector {
[6051]37    private IValueParameter<BoolValue> CopySelectedParameter {
38      get { return (IValueParameter<BoolValue>)Parameters["CopySelected"]; }
[3129]39    }
40    public IValueLookupParameter<IntValue> NumberOfSelectedSubScopesParameter {
41      get { return (ValueLookupParameter<IntValue>)Parameters["NumberOfSelectedSubScopes"]; }
42    }
[2]43
[3129]44    public BoolValue CopySelected {
45      get { return CopySelectedParameter.Value; }
46      set { CopySelectedParameter.Value = value; }
47    }
[4068]48
[4722]49    [StorableConstructor]
50    private RandomSelector(bool deserializing) : base(deserializing) { }
51    private RandomSelector(RandomSelector original, Cloner cloner)
52      : base(original, cloner) {
53    }
54    public override IDeepCloneable Clone(Cloner cloner) {
55      return new RandomSelector(this, cloner);
56    }
[4068]57    public RandomSelector()
58      : base() {
[3129]59      Parameters.Add(new ValueParameter<BoolValue>("CopySelected", "True if the selected sub-scopes should be copied, otherwise false.", new BoolValue(true)));
60      Parameters.Add(new ValueLookupParameter<IntValue>("NumberOfSelectedSubScopes", "The number of sub-scopes which should be selected."));
[6051]61      CopySelectedParameter.Hidden = true;
[3129]62    }
63
[2830]64    protected override IScope[] Select(List<IScope> scopes) {
[2805]65      int count = NumberOfSelectedSubScopesParameter.ActualValue.Value;
66      bool copy = CopySelectedParameter.Value.Value;
67      IRandom random = RandomParameter.ActualValue;
[2830]68      IScope[] selected = new IScope[count];
[2805]69
70      for (int i = 0; i < count; i++) {
71        if (copy)
[2830]72          selected[i] = (IScope)scopes[random.Next(scopes.Count)].Clone();
[2805]73        else {
[2817]74          int index = random.Next(scopes.Count);
[2830]75          selected[i] = scopes[index];
[2817]76          scopes.RemoveAt(index);
[2]77        }
78      }
[2817]79      return selected;
[2]80    }
81  }
82}
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