Unity The Property Matching Rule

Unity提供了针对类型属性的拦截规则PropertyMatchingRule类型。它的属性名称匹配通配符规则和MemberNameMatchingRule等类型相同。它可以指定拦截getter、setter或者同时拦截。看一个简单的示例:

 1 public class MyObject2
 2 {
 3   public virtual String ID { get; set; }
 4 
 5   public virtual String Name { get; set; }
 6 }
 7 
 8 public sealed class Log4NetHandler : ICallHandler
 9 {
10   #region ICallHandler Members
11 
12   public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
13   {
14     Console.WriteLine(input.MethodBase.Name);
15 
16     return getNext()(input, getNext);
17   }
18 
19   public Int32 Order { get; set; }
20 
21   #endregion
22 }
23 
24 IUnityContainer unityContainer = new UnityContainer();
25 
26 unityContainer.LoadConfiguration();
27 unityContainer.Configure<Interception>()
28   .AddPolicy(“PropertyMatchingRule”)
29   .AddMatchingRule(new PropertyMatchingRule(“Name”, PropertyMatchingOption.Set))
30   .AddCallHandler<Log4NetHandler>();
31 unityContainer.RegisterType<MyObject2>(
32   new Interceptor<VirtualMethodInterceptor>(),
33   new InterceptionBehavior<PolicyInjectionBehavior>()
34 );
35 
36 MyObject2 myObject2 = unityContainer.Resolve<MyObject2>();
37 
38 myObject2.Name = “aaa”;
39 
40 Console.WriteLine(myObject2.Name);

上面的示例只有调用Name属性的setter才会被拦截。配置文件定义如下:

<unity xmlns=”http://schemas.microsoft.com/practices/2010/unity”>
  <sectionExtension type=”Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Microsoft.Practices.Unity.Interception.Configuration” />

  <assembly name=”mscorlib, 2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089″ />
  <assembly name=”UnityTest6″ />

  <namespace name=”UnityTest6″ />

  <container>
    <extension type=”Interception” />

    <interception>
      <policy name=”PropertyPolicy”>
        <matchingRule name=”PropertyMatchingRule” type=”PropertyMatchingRule”>
          <constructor>
            <param name=”propertyName” value=”Name” />
            <param name=”option” value=”Set” />
          </constructor>
        </matchingRule>
        <callHandler name=”Log4NetHandler” type=”Log4NetHandler” />
      </policy>
    </interception>

    <register type=”MyObject2″>
      <interceptor type=”VirtualMethodInterceptor” />
      <interceptionBehavior type=”PolicyInjectionBehavior” />
    </register>
  </container>
</unity>
posted @ 2012-08-11 10:27  junchu25  阅读(298)  评论(0编辑  收藏  举报