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comparison Source/Validation/Validator.cs @ 0:f990fcb411a9

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Копия текущей версии из github
author cin
date Thu, 27 Mar 2014 21:46:09 +0400
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-1:000000000000 0:f990fcb411a9
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4
5 using BLToolkit.Reflection;
6
7 namespace BLToolkit.Validation
8 {
9 public class Validator
10 {
11 #region Validate
12
13 public static void Validate(ValidationContext context)
14 {
15 foreach (MemberAccessor ma in context.TypeAccessor)
16 {
17 var attrs = ma.GetAttributes<ValidatorBaseAttribute>();
18
19 if (attrs == null)
20 continue;
21
22 context.MemberAccessor = ma;
23 context.Value = ma.GetValue(context.Object);
24
25 for (var i = 0; i < attrs.Length; i++)
26 {
27 var attr = attrs[i];
28 if (attr.IsValid(context) == false)
29 throw new ValidationException(attr.GetErrorMessage(context));
30 }
31 }
32 }
33
34 public static void Validate(object obj, ValidationContext.IsNullHandler isNull)
35 {
36 Validate(InitContext(null, obj, null, isNull));
37 }
38
39 public static void Validate(object obj)
40 {
41 Validate(obj, null);
42 }
43
44 #endregion
45
46 #region Protected Members
47
48 private static bool IsNullInternal(ValidationContext context)
49 {
50 if (context.Value == null)
51 return true;
52
53 if (context.NullValue is DBNull)
54 return false;
55
56 return context.NullValue.Equals(context.Value);
57 }
58
59 public static ValidationContext InitContext(
60 ValidationContext context,
61 object obj,
62 PropertyDescriptor pd,
63 ValidationContext.IsNullHandler isNull)
64 {
65 if (context == null)
66 context = new ValidationContext();
67
68 context.Object = obj;
69 context.IsNull = isNull ?? new ValidationContext.IsNullHandler(IsNullInternal);
70 context.PropertyDescriptor = pd;
71
72 return context;
73 }
74
75 #endregion
76
77 #region IsValid
78
79 public static bool IsValid(ValidationContext context, string fieldName)
80 {
81 ValidatorBaseAttribute[] attrs = null;
82 object value = null;
83
84 #if !SILVERLIGHT
85
86 if (context.PropertyDescriptor != null)
87 {
88 value = context.PropertyDescriptor.GetValue(context.Object);
89
90 List<ValidatorBaseAttribute> list = null;
91
92 foreach (var o in context.PropertyDescriptor.Attributes)
93 {
94 if (o is ValidatorBaseAttribute)
95 {
96 if (list == null)
97 list = new List<ValidatorBaseAttribute>();
98
99 list.Add((ValidatorBaseAttribute)o);
100 }
101 }
102
103 if (list != null)
104 attrs = list.ToArray();
105 }
106 else
107
108 #endif
109
110 {
111 context.MemberAccessor = context.TypeAccessor[fieldName];
112
113 if (context.MemberAccessor != null)
114 {
115 value = context.MemberAccessor.GetValue(context.Object);
116 attrs = context.MemberAccessor.GetAttributes<ValidatorBaseAttribute>();
117 }
118 }
119
120 if (attrs != null)
121 {
122 context.Value = value;
123
124 for (var i = 0; i < attrs.Length; i++)
125 {
126 if (!attrs[i].IsValid(context))
127 return false;
128 }
129 }
130
131 return true;
132 }
133
134 public static bool IsValid(object obj, string fieldName, ValidationContext.IsNullHandler isNull)
135 {
136 return IsValid(InitContext(null, obj, null, isNull), fieldName);
137 }
138
139 #if !SILVERLIGHT
140
141 public static bool IsValid(object obj, PropertyDescriptor pd, ValidationContext.IsNullHandler isNull)
142 {
143 return IsValid(InitContext(null, obj, pd, isNull), pd.Name);
144 }
145
146 public static bool IsValid(object obj, PropertyDescriptor pd)
147 {
148 return IsValid(obj, pd, null);
149 }
150
151 #endif
152
153 public static bool IsValid(object obj, string fieldName)
154 {
155 return IsValid(obj, fieldName, null);
156 }
157
158 #endregion
159
160 #region GetErrorMessages
161
162 public static string[] GetErrorMessages(ValidationContext context, string fieldName)
163 {
164 context.MemberAccessor = context.TypeAccessor[fieldName];
165
166 if (context.MemberAccessor != null)
167 {
168 var messages = new List<string>();
169 var attrs = context.MemberAccessor.GetAttributes<ValidatorBaseAttribute>();
170
171 if (attrs != null)
172 {
173 context.Value = context.MemberAccessor.GetValue(context.Object);
174
175 for (var i = 0; i < attrs.Length; i++)
176 messages.Add(attrs[i].GetErrorMessage(context));
177
178 return messages.ToArray();
179 }
180 }
181
182 return new string[0];
183 }
184
185 public static string[] GetErrorMessages(
186 object obj, string fieldName, ValidationContext.IsNullHandler isNull)
187 {
188 return GetErrorMessages(InitContext(null, obj, null, isNull), fieldName);
189 }
190
191 #if !SILVERLIGHT
192
193 public static string[] GetErrorMessages(object obj, PropertyDescriptor pd, ValidationContext.IsNullHandler isNull)
194 {
195 return GetErrorMessages(InitContext(null, obj, pd, isNull), pd.Name);
196 }
197
198 public static string[] GetErrorMessages(object obj, PropertyDescriptor pd)
199 {
200 return GetErrorMessages(obj, pd, null);
201 }
202
203 #endif
204
205 public static string[] GetErrorMessages(object obj, string fieldName)
206 {
207 return GetErrorMessages(obj, fieldName, null);
208 }
209
210 #endregion
211 }
212 }