-
-
Notifications
You must be signed in to change notification settings - Fork 540
/
TypeExtensions.cs
406 lines (342 loc) · 15.6 KB
/
TypeExtensions.cs
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Runtime.CompilerServices;
using FluentAssertions.Equivalency;
namespace FluentAssertions.Common
{
public static class TypeExtensions
{
private const BindingFlags PublicMembersFlag =
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance;
private const BindingFlags AllMembersFlag =
PublicMembersFlag | BindingFlags.NonPublic | BindingFlags.Static;
/// <summary>
/// Determines whether the specified method has been annotated with a specific attribute.
/// </summary>
/// <returns>
/// <c>true</c> if the specified method has attribute; otherwise, <c>false</c>.
/// </returns>
public static bool HasAttribute<TAttribute>(this MemberInfo method) where TAttribute : Attribute
{
return method.GetCustomAttributes(typeof(TAttribute), true).Any();
}
public static bool HasMatchingAttribute<TAttribute>(this MemberInfo type,
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate)
where TAttribute : Attribute
{
Func<TAttribute, bool> isMatchingAttribute = isMatchingAttributePredicate.Compile();
return GetCustomAttributes<TAttribute>(type).Any(isMatchingAttribute);
}
public static bool HasMatchingAttribute<TAttribute>(this Type type,
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate, bool inherit = false)
where TAttribute : Attribute
{
Func<TAttribute, bool> isMatchingAttribute = isMatchingAttributePredicate.Compile();
return GetCustomAttributes<TAttribute>(type, inherit).Any(isMatchingAttribute);
}
public static bool IsDecoratedWith<TAttribute>(this MemberInfo type)
where TAttribute : Attribute
{
return GetCustomAttributes<TAttribute>(type).Any();
}
public static bool IsDecoratedWith<TAttribute>(this Type type, bool inherit = false)
where TAttribute : Attribute
{
return GetCustomAttributes<TAttribute>(type, inherit).Any();
}
private static IEnumerable<TAttribute> GetCustomAttributes<TAttribute>(MemberInfo type)
where TAttribute : Attribute
{
return type.GetCustomAttributes(false).OfType<TAttribute>();
}
private static IEnumerable<TAttribute> GetCustomAttributes<TAttribute>(Type type, bool inherit = false)
where TAttribute : Attribute
{
return GetCustomAttributes<TAttribute>(type.GetTypeInfo(), inherit);
}
private static IEnumerable<TAttribute> GetCustomAttributes<TAttribute>(TypeInfo typeInfo, bool inherit = false)
where TAttribute : Attribute
{
return typeInfo.GetCustomAttributes(inherit).OfType<TAttribute>();
}
/// <summary>
/// Determines whether two <see cref="FluentAssertions.Equivalency.SelectedMemberInfo" /> objects refer to the same
/// member.
/// </summary>
public static bool IsEquivalentTo(this SelectedMemberInfo property, SelectedMemberInfo otherProperty)
{
return (property.DeclaringType.IsSameOrInherits(otherProperty.DeclaringType) ||
otherProperty.DeclaringType.IsSameOrInherits(property.DeclaringType)) &&
property.Name == otherProperty.Name;
}
public static bool IsSameOrInherits(this Type actualType, Type expectedType)
{
return actualType == expectedType ||
expectedType.IsAssignableFrom(actualType);
}
/// <summary>
/// NOTE: This method does not give the expected results with open generics
/// </summary>
public static bool Implements(this Type type, Type expectedBaseType)
{
return
expectedBaseType.IsAssignableFrom(type)
&& type != expectedBaseType;
}
internal static Type[] GetClosedGenericInterfaces(Type type, Type openGenericType)
{
if (type.GetTypeInfo().IsGenericType && type.GetGenericTypeDefinition() == openGenericType)
{
return new[] {type};
}
Type[] interfaces = type.GetInterfaces();
return
interfaces
.Where(t => t.GetTypeInfo().IsGenericType && t.GetGenericTypeDefinition() == openGenericType)
.ToArray();
}
public static bool OverridesEquals(this Type type)
{
IEnumerable<MethodInfo> methods = type
.GetMethods(BindingFlags.Public | BindingFlags.Instance);
methods = methods
.Where(m => m.Name == "Equals" &&
m.GetParameters().Select(p => p.ParameterType).SequenceEqual(new[] {typeof(object)}));
methods = methods
.Where(m => m.GetBaseDefinition().DeclaringType != m.DeclaringType)
.ToArray();
return methods.Any();
}
/// <summary>
/// Finds a member by its case-sensitive name.
/// </summary>
/// <returns>
/// Returns <c>null</c> if no such member exists.
/// </returns>
public static SelectedMemberInfo FindMember(this Type type, string memberName, Type preferredType)
{
return SelectedMemberInfo.Create(FindProperty(type, memberName, preferredType)) ??
SelectedMemberInfo.Create(FindField(type, memberName, preferredType));
}
/// <summary>
/// Finds the property by a case-sensitive name.
/// </summary>
/// <returns>
/// Returns <c>null</c> if no such property exists.
/// </returns>
public static PropertyInfo FindProperty(this Type type, string propertyName, Type preferredType)
{
IEnumerable<PropertyInfo> properties =
type.GetProperties(PublicMembersFlag)
.Where(pi => pi.Name == propertyName)
.ToList();
return properties.Count() > 1
? properties.SingleOrDefault(p => p.PropertyType == preferredType)
: properties.SingleOrDefault();
}
/// <summary>
/// Finds the field by a case-sensitive name.
/// </summary>
/// <returns>
/// Returns <c>null</c> if no such property exists.
/// </returns>
public static FieldInfo FindField(this Type type, string fieldName, Type preferredType)
{
IEnumerable<FieldInfo> properties =
type.GetFields(PublicMembersFlag)
.Where(pi => pi.Name == fieldName)
.ToList();
return properties.Count() > 1
? properties.SingleOrDefault(p => p.FieldType == preferredType)
: properties.SingleOrDefault();
}
public static IEnumerable<SelectedMemberInfo> GetNonPrivateMembers(this Type typeToReflect)
{
return
GetNonPrivateProperties(typeToReflect)
.Select(SelectedMemberInfo.Create)
.Concat(GetNonPrivateFields(typeToReflect).Select(SelectedMemberInfo.Create))
.ToArray();
}
public static IEnumerable<PropertyInfo> GetNonPrivateProperties(this Type typeToReflect,
IEnumerable<string> filter = null)
{
IEnumerable<PropertyInfo> query =
from propertyInfo in GetPropertiesFromHierarchy(typeToReflect)
where HasNonPrivateGetter(propertyInfo)
where !propertyInfo.IsIndexer()
where filter == null || filter.Contains(propertyInfo.Name)
select propertyInfo;
return query.ToArray();
}
public static IEnumerable<FieldInfo> GetNonPrivateFields(this Type typeToReflect)
{
IEnumerable<FieldInfo> query =
from fieldInfo in GetFieldsFromHierarchy(typeToReflect)
where !fieldInfo.IsPrivate
where !fieldInfo.IsFamily
select fieldInfo;
return query.ToArray();
}
private static IEnumerable<FieldInfo> GetFieldsFromHierarchy(Type typeToReflect)
{
return GetMembersFromHierarchy(typeToReflect, GetPublicFields);
}
private static IEnumerable<PropertyInfo> GetPropertiesFromHierarchy(Type typeToReflect)
{
return GetMembersFromHierarchy(typeToReflect, GetPublicProperties);
}
private static IEnumerable<TMemberInfo> GetMembersFromHierarchy<TMemberInfo>(
Type typeToReflect,
Func<Type, IEnumerable<TMemberInfo>> getMembers) where TMemberInfo : MemberInfo
{
if (IsInterface(typeToReflect))
{
var propertyInfos = new List<TMemberInfo>();
var considered = new List<Type>();
var queue = new Queue<Type>();
considered.Add(typeToReflect);
queue.Enqueue(typeToReflect);
while (queue.Count > 0)
{
Type subType = queue.Dequeue();
foreach (Type subInterface in GetInterfaces(subType))
{
if (considered.Contains(subInterface))
{
continue;
}
considered.Add(subInterface);
queue.Enqueue(subInterface);
}
IEnumerable<TMemberInfo> typeProperties = getMembers(subType);
IEnumerable<TMemberInfo> newPropertyInfos = typeProperties.Where(x => !propertyInfos.Contains(x));
propertyInfos.InsertRange(0, newPropertyInfos);
}
return propertyInfos.ToArray();
}
return getMembers(typeToReflect);
}
private static bool IsInterface(Type typeToReflect)
{
return typeToReflect.GetTypeInfo().IsInterface;
}
private static IEnumerable<Type> GetInterfaces(Type type)
{
return type.GetInterfaces();
}
private static IEnumerable<PropertyInfo> GetPublicProperties(Type type)
{
return type.GetProperties(PublicMembersFlag);
}
private static IEnumerable<FieldInfo> GetPublicFields(Type type)
{
return type.GetFields(PublicMembersFlag);
}
private static bool HasNonPrivateGetter(PropertyInfo propertyInfo)
{
MethodInfo getMethod = propertyInfo.GetGetMethod(true);
return getMethod != null && !getMethod.IsPrivate && !getMethod.IsFamily;
}
public static MethodInfo GetMethod(this Type type, string methodName, IEnumerable<Type> parameterTypes)
{
return type.GetMethods(AllMembersFlag)
.SingleOrDefault(m =>
m.Name == methodName && m.GetParameters().Select(p => p.ParameterType).SequenceEqual(parameterTypes));
}
public static bool HasMethod(this Type type, string methodName, IEnumerable<Type> parameterTypes)
{
return type.GetMethod(methodName, parameterTypes) != null;
}
public static MethodInfo GetParameterlessMethod(this Type type, string methodName)
{
return type.GetMethod(methodName, Enumerable.Empty<Type>());
}
public static bool HasParameterlessMethod(this Type type, string methodName)
{
return type.GetParameterlessMethod(methodName) != null;
}
public static PropertyInfo GetPropertyByName(this Type type, string propertyName)
{
return type.GetProperty(propertyName, AllMembersFlag);
}
public static bool HasExplicitlyImplementedProperty(this Type type, Type interfaceType, string propertyName)
{
bool hasGetter = type.HasParameterlessMethod(string.Format("{0}.get_{1}", interfaceType.FullName, propertyName));
bool hasSetter = type.GetMethods(AllMembersFlag)
.SingleOrDefault(m =>
m.Name == string.Format("{0}.set_{1}", interfaceType.FullName, propertyName) &&
m.GetParameters().Length == 1) != null;
return hasGetter || hasSetter;
}
public static PropertyInfo GetIndexerByParameterTypes(this Type type, IEnumerable<Type> parameterTypes)
{
return type.GetProperties(AllMembersFlag)
.SingleOrDefault(p =>
p.IsIndexer() && p.GetIndexParameters().Select(i => i.ParameterType).SequenceEqual(parameterTypes));
}
public static bool IsIndexer(this PropertyInfo member)
{
return member.GetIndexParameters().Length != 0;
}
public static ConstructorInfo GetConstructor(this Type type, IEnumerable<Type> parameterTypes)
{
return type
.GetConstructors(PublicMembersFlag)
.SingleOrDefault(m => m.GetParameters().Select(p => p.ParameterType).SequenceEqual(parameterTypes));
}
public static MethodInfo GetImplicitConversionOperator(this Type type, Type sourceType, Type targetType)
{
return type
.GetConversionOperators(sourceType, targetType, name => name == "op_Implicit")
.SingleOrDefault();
}
public static MethodInfo GetExplicitConversionOperator(this Type type, Type sourceType, Type targetType)
{
return type
.GetConversionOperators(sourceType, targetType, name => name == "op_Explicit")
.SingleOrDefault();
}
private static IEnumerable<MethodInfo> GetConversionOperators(this Type type, Type sourceType, Type targetType,
Func<string, bool> predicate)
{
return type
.GetMethods()
.Where(m =>
m.IsPublic
&& m.IsStatic
&& m.IsSpecialName
&& m.ReturnType == targetType
&& predicate(m.Name)
&& m.GetParameters().Length == 1
&& m.GetParameters()[0].ParameterType == sourceType
);
}
public static bool IsAnonymousType(this Type type)
{
bool hasCompilerGeneratedAttribute =
type.GetTypeInfo().GetCustomAttributes(typeof(CompilerGeneratedAttribute), false).Any();
bool nameContainsAnonymousType = type.FullName.Contains("AnonymousType");
return hasCompilerGeneratedAttribute && nameContainsAnonymousType;
}
public static bool IsTuple(this Type type)
{
if (!type.GetTypeInfo().IsGenericType)
{
return false;
}
Type openType = type.GetGenericTypeDefinition();
return openType == typeof(ValueTuple<>)
|| openType == typeof(ValueTuple<,>)
|| openType == typeof(ValueTuple<,,>)
|| openType == typeof(ValueTuple<,,,>)
|| openType == typeof(ValueTuple<,,,,>)
|| openType == typeof(ValueTuple<,,,,,>)
|| openType == typeof(ValueTuple<,,,,,,>)
|| openType == typeof(ValueTuple<,,,,,,,>) && IsTuple(type.GetGenericArguments()[7]);
}
}
}