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source: trunk/sources/HeuristicLab.Parameters/3.3/Parameter.cs @ 3039

Last change on this file since 3039 was 3017, checked in by epitzer, 15 years ago

Merge StorableClassType.Empty into StorableClassType.MarkedOnly and make it the default if not specified (#548)

File size: 3.1 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;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Parameters {
28  /// <summary>
29  /// A base class for parameters.
30  /// </summary>
31  [Item("Parameter", "A base class for parameters.")]
32  [StorableClass]
33  public abstract class Parameter : NamedItem, IParameter {
34    public override bool CanChangeName {
35      get { return false; }
36    }
37    public override bool CanChangeDescription {
38      get { return false; }
39    }
40
41    [Storable]
42    private Type dataType;
43    public Type DataType {
44      get { return dataType; }
45    }
46    protected IItem cachedActualValue;
47    public IItem ActualValue {
48      get {
49        if (cachedActualValue == null) cachedActualValue = GetActualValue();
50        return cachedActualValue;
51      }
52      set {
53        cachedActualValue = value;
54        SetActualValue(value);
55      }
56    }
57    [Storable]
58    private IExecutionContext executionContext;
59    public IExecutionContext ExecutionContext {
60      get { return executionContext; }
61      set {
62        if (value != executionContext) {
63          executionContext = value;
64          cachedActualValue = null;
65          OnExecutionContextChanged();
66        }
67      }
68    }
69
70    protected Parameter()
71      : base("Anonymous") {
72      dataType = typeof(IItem);
73    }
74    protected Parameter(string name, Type dataType)
75      : base(name) {
76      if (dataType == null) throw new ArgumentNullException();
77      this.dataType = dataType;
78    }
79    protected Parameter(string name, string description, Type dataType)
80      : base(name, description) {
81      if (dataType == null) throw new ArgumentNullException();
82      this.dataType = dataType;
83    }
84
85    public override IDeepCloneable Clone(Cloner cloner) {
86      Parameter clone = (Parameter)base.Clone(cloner);
87      clone.dataType = dataType;
88      clone.executionContext = (IExecutionContext)cloner.Clone(executionContext);
89      return clone;
90    }
91
92    public override string ToString() {
93      return string.Format("{0} ({1})", Name, DataType.GetPrettyName());
94    }
95
96    protected abstract IItem GetActualValue();
97    protected abstract void SetActualValue(IItem value);
98
99    protected virtual void OnExecutionContextChanged() { }
100  }
101}
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