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source: trunk/sources/HeuristicLab.Parameters/3.3/ValueLookupParameter.cs @ 3017

Last change on this file since 3017 was 3017, checked in by epitzer, 14 years ago

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

File size: 3.4 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 parameter whose value is either defined in the parameter itself or is retrieved from the scope.
30  /// </summary>
31  [Item("ValueLookupParameter<T>", "A parameter whose value is either defined in the parameter itself or is retrieved from or written to a scope.")]
32  [StorableClass]
33  public class ValueLookupParameter<T> : LookupParameter<T>, IValueLookupParameter<T> where T : class, IItem {
34    private T value;
35    [Storable]
36    public T Value {
37      get { return this.value; }
38      set {
39        if (value != this.value) {
40          if (this.value != null) this.value.ToStringChanged -= new EventHandler(Value_ToStringChanged);
41          this.value = value;
42          if (this.value != null) this.value.ToStringChanged += new EventHandler(Value_ToStringChanged);
43          OnValueChanged();
44        }
45      }
46    }
47    IItem IValueParameter.Value {
48      get { return Value; }
49      set {
50        T val = value as T;
51        if ((value != null) && (val == null))
52          throw new InvalidOperationException(
53            string.Format("Type mismatch. Value is not a \"{0}\".",
54                          typeof(T).GetPrettyName())
55          );
56        Value = val;
57      }
58    }
59
60    public ValueLookupParameter()
61      : base() {
62    }
63    public ValueLookupParameter(string name)
64      : base(name) {
65    }
66    public ValueLookupParameter(string name, T value)
67      : base(name) {
68      Value = value;
69    }
70    public ValueLookupParameter(string name, string description)
71      : base(name, description) {
72    }
73    public ValueLookupParameter(string name, string description, T value)
74      : base(name, description) {
75      Value = value;
76    }
77
78    public override IDeepCloneable Clone(Cloner cloner) {
79      ValueLookupParameter<T> clone = (ValueLookupParameter<T>)base.Clone(cloner);
80      clone.Value = (T)cloner.Clone(value);
81      return clone;
82    }
83
84    public override string ToString() {
85      return string.Format("{0}: {1} ({2})", Name, Value != null ? Value.ToString() : ActualName, DataType.GetPrettyName());
86    }
87
88    public event EventHandler ValueChanged;
89    private void OnValueChanged() {
90      if (ValueChanged != null)
91        ValueChanged(this, EventArgs.Empty);
92      OnToStringChanged();
93    }
94    private void Value_ToStringChanged(object sender, EventArgs e) {
95      OnToStringChanged();
96    }
97  }
98}
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