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source: stable/HeuristicLab.Data/3.3/StringValue.cs @ 17181

Last change on this file since 17181 was 17181, checked in by swagner, 5 years ago

#2875: Merged r17180 from trunk to stable

File size: 4.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 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 System.Drawing;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HEAL.Attic;
27
28namespace HeuristicLab.Data {
29  [Item("StringValue", "Represents a string.")]
30  [StorableType("1091C8E5-4480-447C-8EB3-AA260C59976D")]
31  public class StringValue : Item, IComparable, IStringConvertibleValue {
32    public static new Image StaticItemImage {
33      get { return HeuristicLab.Common.Resources.VSImageLibrary.Field; }
34    }
35
36    [Storable]
37    protected string value;
38    public virtual string Value {
39      get { return value; }
40      set {
41        if (ReadOnly) throw new NotSupportedException("Value cannot be set. StringValue is read-only.");
42        if (value != this.value) {
43          if ((value != null) || (this.value != string.Empty)) {
44            this.value = value != null ? value : string.Empty;
45            OnValueChanged();
46          }
47        }
48      }
49    }
50
51    [Storable]
52    protected bool readOnly;
53    public virtual bool ReadOnly {
54      get { return readOnly; }
55    }
56
57    [StorableConstructor]
58    protected StringValue(StorableConstructorFlag _) : base(_) { }
59    protected StringValue(StringValue original, Cloner cloner)
60      : base(original, cloner) {
61      this.value = original.value != null ? original.value : string.Empty;
62      this.readOnly = original.readOnly;
63    }
64    public StringValue() {
65      this.value = string.Empty;
66      this.readOnly = false;
67    }
68    public StringValue(string value) {
69      this.value = value != null ? value : string.Empty;
70      this.readOnly = false;
71    }
72
73    public override IDeepCloneable Clone(Cloner cloner) {
74      return new StringValue(this, cloner);
75    }
76
77    public virtual StringValue AsReadOnly() {
78      StringValue readOnlyStringValue = (StringValue)this.Clone();
79      readOnlyStringValue.readOnly = true;
80      return readOnlyStringValue;
81    }
82
83    public override string ToString() {
84      return value;
85    }
86
87    public virtual int CompareTo(object obj) {
88      StringValue other = obj as StringValue;
89      if (other != null)
90        return Value.CompareTo(other.Value);
91      else
92        return Value.CompareTo(obj);
93    }
94
95    public event EventHandler ValueChanged;
96    protected virtual void OnValueChanged() {
97      if (ValueChanged != null)
98        ValueChanged(this, EventArgs.Empty);
99      OnToStringChanged();
100    }
101
102    protected virtual bool Validate(string value, out string errorMessage) {
103      if (value == null) {
104        errorMessage = "Invalid Value (string must not be null)";
105        return false;
106      } else {
107        errorMessage = string.Empty;
108        return true;
109      }
110    }
111    protected virtual string GetValue() {
112      return Value;
113    }
114    protected virtual bool SetValue(string value) {
115      if (value != null) {
116        Value = value;
117        return true;
118      } else {
119        return false;
120      }
121    }
122
123    #region IStringConvertibleValue Members
124    bool IStringConvertibleValue.Validate(string value, out string errorMessage) {
125      return Validate(value, out errorMessage);
126    }
127    string IStringConvertibleValue.GetValue() {
128      return GetValue();
129    }
130    bool IStringConvertibleValue.SetValue(string value) {
131      return SetValue(value);
132    }
133    #endregion
134  }
135}
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