1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
//
// System.Configuration.ConfigurationProperty.cs
//
// Authors:
// Duncan Mak (duncan@ximian.com)
// Lluis Sanchez Gual (lluis@novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
using System;
using System.ComponentModel;
namespace System.Configuration
{
public sealed class ConfigurationProperty
{
internal static readonly object NoDefaultValue = new object ();
string name;
Type type;
object default_value;
TypeConverter converter;
ConfigurationValidatorBase validation;
ConfigurationPropertyOptions flags;
string description;
ConfigurationCollectionAttribute collectionAttribute;
public ConfigurationProperty (string name, Type type)
: this (name, type, NoDefaultValue, TypeDescriptor.GetConverter (type), new DefaultValidator(), ConfigurationPropertyOptions.None, null)
{ }
public ConfigurationProperty (string name, Type type, object defaultValue)
: this (name, type, defaultValue, TypeDescriptor.GetConverter (type), new DefaultValidator(), ConfigurationPropertyOptions.None, null)
{ }
public ConfigurationProperty (
string name, Type type, object defaultValue,
ConfigurationPropertyOptions options)
:this (name, type, defaultValue, TypeDescriptor.GetConverter (type), new DefaultValidator(), options, null)
{ }
public ConfigurationProperty (
string name, Type type, object defaultValue,
TypeConverter typeConverter,
ConfigurationValidatorBase validator,
ConfigurationPropertyOptions options)
: this (name, type, defaultValue, typeConverter, validator, options, null)
{ }
public ConfigurationProperty (
string name, Type type, object defaultValue,
TypeConverter typeConverter,
ConfigurationValidatorBase validator,
ConfigurationPropertyOptions options,
string description)
{
this.name = name;
this.converter = typeConverter != null ? typeConverter : TypeDescriptor.GetConverter (type);
if (defaultValue != null) {
if (defaultValue == NoDefaultValue) {
switch (Type.GetTypeCode (type)) {
case TypeCode.Object:
defaultValue = null;
break;
case TypeCode.String:
defaultValue = String.Empty;
break;
default:
defaultValue = Activator.CreateInstance (type);
break;
}
}
else
if (!type.IsAssignableFrom (defaultValue.GetType ())) {
if (!this.converter.CanConvertFrom (defaultValue.GetType ()))
throw new ConfigurationErrorsException (String.Format ("The default value for property '{0}' has a different type than the one of the property itself: expected {1} but was {2}",
name, type, defaultValue.GetType ()));
defaultValue = this.converter.ConvertFrom (defaultValue);
}
}
this.default_value = defaultValue;
this.flags = options;
this.type = type;
this.validation = validator != null ? validator : new DefaultValidator ();
this.description = description;
}
public TypeConverter Converter {
get { return converter; }
}
public object DefaultValue {
get { return default_value; }
}
public bool IsKey {
get { return (flags & ConfigurationPropertyOptions.IsKey) != 0; }
}
public bool IsRequired {
get { return (flags & ConfigurationPropertyOptions.IsRequired) != 0; }
}
public bool IsDefaultCollection {
get { return (flags & ConfigurationPropertyOptions.IsDefaultCollection) != 0; }
}
public string Name {
get { return name; }
}
public string Description {
get { return description; }
}
public Type Type {
get { return type; }
}
public ConfigurationValidatorBase Validator {
get { return validation; }
}
internal object ConvertFromString (string value)
{
if (converter != null)
return converter.ConvertFromInvariantString (value);
else
throw new NotImplementedException ();
}
internal string ConvertToString (object value)
{
if (converter != null)
return converter.ConvertToInvariantString (value);
else
throw new NotImplementedException ();
}
internal bool IsElement {
get {
return (typeof(ConfigurationElement).IsAssignableFrom (type));
}
}
internal ConfigurationCollectionAttribute CollectionAttribute {
get { return collectionAttribute; }
set { collectionAttribute = value; }
}
internal void Validate (object value)
{
if (validation != null)
validation.Validate (value);
}
}
}
|
