-
Notifications
You must be signed in to change notification settings - Fork 4.6k
/
PartBuilderOfT.cs
245 lines (201 loc) · 9.13 KB
/
PartBuilderOfT.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
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Reflection;
namespace System.ComponentModel.Composition.Registration
{
public class PartBuilder<T> : PartBuilder
{
private sealed class PropertyExpressionAdapter
{
private readonly PropertyInfo _propertyInfo;
private readonly Action<ImportBuilder> _configureImport;
private readonly Action<ExportBuilder> _configureExport;
public PropertyExpressionAdapter(Expression<Func<T, object>> propertyFilter,
Action<ImportBuilder> configureImport = null,
Action<ExportBuilder> configureExport = null)
{
_propertyInfo = SelectProperties(propertyFilter);
_configureImport = configureImport;
_configureExport = configureExport;
}
public bool VerifyPropertyInfo(PropertyInfo pi)
{
return pi == _propertyInfo;
}
public void ConfigureImport(PropertyInfo _, ImportBuilder importBuilder)
{
_configureImport?.Invoke(importBuilder);
}
public void ConfigureExport(PropertyInfo _, ExportBuilder exportBuilder)
{
_configureExport?.Invoke(exportBuilder);
}
private static PropertyInfo SelectProperties(Expression<Func<T, object>> propertyFilter)
{
if (propertyFilter is null)
{
throw new ArgumentNullException(nameof(propertyFilter));
}
Expression expr = Reduce(propertyFilter).Body;
if (expr.NodeType == ExpressionType.MemberAccess)
{
MemberInfo memberInfo = ((MemberExpression)expr).Member;
if (memberInfo.MemberType == MemberTypes.Property)
{
return (PropertyInfo)memberInfo;
}
}
// An error occurred the expression must be a Property Member Expression
throw new ArgumentException(SR.Format(SR.Argument_ExpressionMustBePropertyMember, nameof(propertyFilter)), nameof(propertyFilter));
}
private static Expression<Func<T, object>> Reduce(Expression<Func<T, object>> expr)
{
while (expr.CanReduce)
{
expr = (Expression<Func<T, object>>)expr.Reduce();
}
return expr;
}
}
private sealed class ConstructorExpressionAdapter
{
private ConstructorInfo _constructorInfo;
private Dictionary<ParameterInfo, Action<ImportBuilder>> _importBuilders;
public ConstructorExpressionAdapter(Expression<Func<ParameterImportBuilder, T>> selectConstructor)
{
ParseSelectConstructor(selectConstructor);
}
public ConstructorInfo SelectConstructor(ConstructorInfo[] _)
{
return _constructorInfo;
}
public void ConfigureConstructorImports(ParameterInfo parameterInfo, ImportBuilder importBuilder)
{
if (_importBuilders != null &&
_importBuilders.TryGetValue(parameterInfo, out Action<ImportBuilder> parameterImportBuilder))
{
parameterImportBuilder(importBuilder);
}
}
private void ParseSelectConstructor(Expression<Func<ParameterImportBuilder, T>> constructorFilter)
{
if (constructorFilter is null)
{
throw new ArgumentNullException(nameof(constructorFilter));
}
Expression expr = Reduce(constructorFilter).Body;
if (expr.NodeType != ExpressionType.New)
{
throw new ArgumentException(SR.Format(SR.Argument_ExpressionMustBePropertyMember, nameof(constructorFilter)), nameof(constructorFilter));
}
var newExpression = (NewExpression)expr;
_constructorInfo = newExpression.Constructor;
int index = 0;
ParameterInfo[] parameterInfos = _constructorInfo.GetParameters();
foreach (Expression argument in newExpression.Arguments)
{
if (argument.NodeType == ExpressionType.Call)
{
var methodCallExpression = (MethodCallExpression)argument;
if (methodCallExpression.Arguments.Count == 1)
{
Expression parameter = methodCallExpression.Arguments[0];
if (parameter.NodeType == ExpressionType.Lambda)
{
var lambdaExpression = (LambdaExpression)parameter;
Delegate importDelegate = lambdaExpression.Compile();
_importBuilders ??= new Dictionary<ParameterInfo, Action<ImportBuilder>>();
_importBuilders.Add(parameterInfos[index], (Action<ImportBuilder>)importDelegate);
++index;
}
}
}
}
}
private static Expression<Func<ParameterImportBuilder, T>> Reduce(Expression<Func<ParameterImportBuilder, T>> expr)
{
while (expr.CanReduce)
{
expr.Reduce();
}
return expr;
}
}
internal PartBuilder(Predicate<Type> selectType) : base(selectType)
{
}
public PartBuilder<T> SelectConstructor(Expression<Func<ParameterImportBuilder, T>> constructorFilter)
{
if (constructorFilter is null)
{
throw new ArgumentNullException(nameof(constructorFilter));
}
var adapter = new ConstructorExpressionAdapter(constructorFilter);
SelectConstructor(adapter.SelectConstructor, adapter.ConfigureConstructorImports);
return this;
}
public PartBuilder<T> ExportProperty(Expression<Func<T, object>> propertyFilter)
{
return ExportProperty(propertyFilter, null);
}
public PartBuilder<T> ExportProperty(
Expression<Func<T, object>> propertyFilter,
Action<ExportBuilder> exportConfiguration)
{
if (propertyFilter is null)
{
throw new ArgumentNullException(nameof(propertyFilter));
}
var adapter = new PropertyExpressionAdapter(propertyFilter, null, exportConfiguration);
ExportProperties(adapter.VerifyPropertyInfo, adapter.ConfigureExport);
return this;
}
public PartBuilder<T> ExportProperty<TContract>(Expression<Func<T, object>> propertyFilter)
{
return ExportProperty<TContract>(propertyFilter, null);
}
public PartBuilder<T> ExportProperty<TContract>(Expression<Func<T, object>> propertyFilter,
Action<ExportBuilder> exportConfiguration)
{
if (propertyFilter is null)
{
throw new ArgumentNullException(nameof(propertyFilter));
}
var adapter = new PropertyExpressionAdapter(propertyFilter, null, exportConfiguration);
ExportProperties<TContract>(adapter.VerifyPropertyInfo, adapter.ConfigureExport);
return this;
}
public PartBuilder<T> ImportProperty(Expression<Func<T, object>> propertyFilter)
{
return ImportProperty(propertyFilter, null);
}
public PartBuilder<T> ImportProperty(Expression<Func<T, object>> propertyFilter,
Action<ImportBuilder> importConfiguration)
{
if (propertyFilter is null)
{
throw new ArgumentNullException(nameof(propertyFilter));
}
var adapter = new PropertyExpressionAdapter(propertyFilter, importConfiguration, null);
ImportProperties(adapter.VerifyPropertyInfo, adapter.ConfigureImport);
return this;
}
public PartBuilder<T> ImportProperty<TContract>(Expression<Func<T, object>> propertyFilter)
{
return ImportProperty<TContract>(propertyFilter, null);
}
public PartBuilder<T> ImportProperty<TContract>(Expression<Func<T, object>> propertyFilter,
Action<ImportBuilder> importConfiguration)
{
if (propertyFilter is null)
{
throw new ArgumentNullException(nameof(propertyFilter));
}
var adapter = new PropertyExpressionAdapter(propertyFilter, importConfiguration, null);
ImportProperties<TContract>(adapter.VerifyPropertyInfo, adapter.ConfigureImport);
return this;
}
}
}