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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
//------------------------------------------------------------------------------
// <copyright file="PropertyMapper.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* PropertyMapper.cs
*
* Copyright (c) 1999 Microsoft Corporation
*/
namespace System.Web.UI {
using System;
using System.Collections;
using System.Reflection;
using System.Web.Util;
using System.ComponentModel;
internal sealed class PropertyMapper {
private const char PERSIST_CHAR = '-';
private const char OM_CHAR = '.';
private const string STR_OM_CHAR = ".";
/*
* Maps persisted attribute names to the object model equivalents.
* This class should not be instantiated by itself.
*/
private PropertyMapper() {
}
/*
* Returns the PropertyInfo or FieldInfo corresponding to the
* specified property name.
*/
internal static MemberInfo GetMemberInfo(Type ctrlType, string name, out string nameForCodeGen) {
Type currentType = ctrlType;
PropertyInfo propInfo = null;
FieldInfo fieldInfo = null;
string mappedName = MapNameToPropertyName(name);
nameForCodeGen = null;
int startIndex = 0;
while (startIndex < mappedName.Length) { // parse thru dots of object model to locate PropertyInfo
string propName;
int index = mappedName.IndexOf(OM_CHAR, startIndex);
if (index < 0) {
propName = mappedName.Substring(startIndex);
startIndex = mappedName.Length;
}
else {
propName = mappedName.Substring(startIndex, index - startIndex);
startIndex = index + 1;
}
BindingFlags flags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.IgnoreCase;
//
try {
propInfo = TargetFrameworkUtil.GetProperty(currentType, propName, flags);
}
catch (AmbiguousMatchException) {
flags |= BindingFlags.DeclaredOnly;
propInfo = TargetFrameworkUtil.GetProperty(currentType, propName, flags);
}
if (propInfo == null) { // could not find a public property, look for a public field
fieldInfo = TargetFrameworkUtil.GetField(currentType, propName, flags);
if (fieldInfo == null) {
nameForCodeGen = null;
break;
}
}
propName = null;
if (propInfo != null) { // found a public property
currentType = propInfo.PropertyType;
propName = propInfo.Name;
}
else { // found a public field
currentType = fieldInfo.FieldType;
propName = fieldInfo.Name;
}
// Throw if the type of not CLS-compliant (ASURT 83438)
if (!IsTypeCLSCompliant(currentType)) {
throw new HttpException(SR.GetString(SR.Property_Not_ClsCompliant, name, ctrlType.FullName, currentType.FullName));
}
if (propName != null) {
if (nameForCodeGen == null)
nameForCodeGen = propName;
else
nameForCodeGen += STR_OM_CHAR + propName;
}
}
if (propInfo != null)
return propInfo;
else
return fieldInfo;
}
private static bool IsTypeCLSCompliant(Type type) {
// We used to check this by looking up the CLSCompliantAttribute, but that was
// way too inefficent. So instead, we just juck for a few specific types
if ((type == typeof(SByte)) ||
(type == typeof(TypedReference)) ||
(type == typeof(UInt16)) ||
(type == typeof(UInt32)) ||
(type == typeof(UInt64)) ||
(type == typeof(UIntPtr))) {
return false;
}
return true;
}
/*
* Maps the specified persisted name to its object model equivalent.
* The convention is to map all dashes to dots.
* For example : Font-Size maps to Font.Size
* HeaderStyle-Font-Name maps to HeaderStyle.Font.Name
*/
internal static string MapNameToPropertyName(string attrName) {
return attrName.Replace(PERSIST_CHAR,OM_CHAR);
}
internal static object LocatePropertyObject(object obj, string mappedName, out string propertyName, bool inDesigner) {
object currentObject = obj;
Type currentType = obj.GetType();
propertyName = null;
int index;
int startIndex = 0;
// step through the dots of the object model to extract the PropertyInfo
// and object on which the property will be set
while (startIndex < mappedName.Length) {
index = mappedName.IndexOf(OM_CHAR, startIndex);
// If we didn't find a separator, we're on the last piece
if (index < 0)
break;
// There is a sub property, so get its info and iterate
propertyName = mappedName.Substring(startIndex, index - startIndex);
startIndex = index + 1;
currentObject = FastPropertyAccessor.GetProperty(currentObject, propertyName, inDesigner);
if (currentObject == null)
return null;
}
// Avoid a useless call to Substring if possible
if (startIndex > 0)
propertyName = mappedName.Substring(startIndex);
else
propertyName = mappedName;
return currentObject;
}
/*
* Walks the object model using the mapped property name to get the
* value of an instance's property.
*/
internal static PropertyDescriptor GetMappedPropertyDescriptor(object obj, string mappedName, out object childObject, out string propertyName, bool inDesigner)
{
childObject = LocatePropertyObject(obj, mappedName, out propertyName, inDesigner);
if (childObject == null) return null;
PropertyDescriptorCollection properties = TargetFrameworkUtil.GetProperties(childObject);
return properties[propertyName];
}
/*
* Walks the object model using the mapped property name to set the
* value of an instance's property.
*/
internal static void SetMappedPropertyValue(object obj, string mappedName, object value, bool inDesigner) {
string propertyName;
object childObj = LocatePropertyObject(obj, mappedName, out propertyName, inDesigner);
if (childObj == null) return;
FastPropertyAccessor.SetProperty(childObj, propertyName, value, inDesigner);
}
}
}
|
