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comparison Extensions/JointureAddOn/Mapping/DataBindingFactory.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.ComponentModel;
3 using Castle.DynamicProxy;
4
5 namespace BLToolkit.Mapping
6 {
7 public static class DataBindingFactory
8 {
9 private static readonly ProxyGenerator ProxyGenerator = new ProxyGenerator();
10
11 public static T Create<T>()
12 {
13 return (T) Create(typeof (T));
14 }
15
16 public static object Create(Type type)
17 {
18 return ProxyGenerator.CreateClassProxy(type, new[]
19 {
20 typeof (INotifyPropertyChanged),
21 typeof (IMarkerInterface)
22 }, new NotifyPropertyChangedInterceptor(type.FullName));
23 }
24
25 public interface IMarkerInterface
26 {
27 string TypeName { get; }
28 }
29
30 public class NotifyPropertyChangedInterceptor : IInterceptor
31 {
32 private readonly string typeName;
33 private PropertyChangedEventHandler subscribers = delegate { };
34
35 public NotifyPropertyChangedInterceptor(string typeName)
36 {
37 this.typeName = typeName;
38 }
39
40 public void Intercept(IInvocation invocation)
41 {
42 if (invocation.Method.DeclaringType == typeof (IMarkerInterface))
43 {
44 invocation.ReturnValue = typeName;
45 return;
46 }
47 if (invocation.Method.DeclaringType == typeof (INotifyPropertyChanged))
48 {
49 var propertyChangedEventHandler = (PropertyChangedEventHandler) invocation.Arguments[0];
50 if (invocation.Method.Name.StartsWith("add_"))
51 {
52 subscribers += propertyChangedEventHandler;
53 }
54 else
55 {
56 subscribers -= propertyChangedEventHandler;
57 }
58 return;
59 }
60 invocation.Proceed();
61 if (invocation.Method.Name.StartsWith("set_"))
62 {
63 var propertyName = invocation.Method.Name.Substring(4);
64 subscribers(invocation.InvocationTarget, new PropertyChangedEventArgs(propertyName));
65 }
66 }
67 }
68 }
69 }