Unity The Method Signature Matching Rule

Unity提供了用于匹配函数名称和类型签名的规则MethodSignatureMatchingRule类型。ParameterTypeMatchingRule用于匹配函数的参数类型和参数性质(In、Out),但是无法匹配函数名称。而MethodSignatureMatchingRule的缺点是无法限制参数性质。看一个简单示例:

 1 public class MyObject
 2 {
 3   public virtual Int32 DoWork(Int32 i, Char c)
 4   {
 5     return i;
 6   }
 7 
 8   public virtual void DoWork2(Int32 i, Char c)
 9   {
10 
11   }
12 
13   public virtual void DoWork3()
14   {
15 
16   }
17 }
18 
19 IUnityContainer unityContainer = new UnityContainer();
20 
21 unityContainer.LoadConfiguration();
22 
23 String[] paramTypeNames = new String[] { “System.Int32″, “System.Char” };
24 
25 unityContainer.Configure<Interception>()
26   .AddPolicy(“MethodSignatureMatchingRule”)
27   .AddMatchingRule(new MethodSignatureMatchingRule(“DoWork*”, paramTypeNames))
28   .AddCallHandler<Log4NetHandler>();
29 unityContainer.RegisterType<MyObject>(
30   new Interceptor<VirtualMethodInterceptor>(),
31   new InterceptionBehavior<PolicyInjectionBehavior>()
32 );
33 
34 MyObject myObject = unityContainer.Resolve<MyObject>();
35 
36 myObject.DoWork(Int32.MaxValue, Char.MaxValue);
37 myObject.DoWork2(Int32.MaxValue, Char.MaxValue);
38 myObject.DoWork3();

相比ParameterTypeMatchingRule,MethodSignatureMatchingRule结合了ParameterTypeMatchingRule和MemberNameMatchingRule的功能,只是它无法限制参数的性质是In、Out。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=”Microsoft.Practices.Unity.Interception” />
  <assembly name=”UnityTest6″ />

  <namespace name=”System” />
  <namespace name=”System.Collections.Generic” />
  <namespace name=”Microsoft.Practices.Unity.InterceptionExtension” />
  <namespace name=”UnityTest6″ />

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

    <register name=”paramTypeNames” type=”IEnumerable[String]” mapTo=”List[String]“>
      <constructor />
      <method name=”Add”>
        <param name=”item” value=”System.Int32″ />
      </method>
      <method name=”Add”>
        <param name=”item” value=”System.Char” />
      </method>
    </register>

    <interception>
      <policy name=”MethodSignaturePolicy”>
        <matchingRule name=”MethodSignatureMatchingRule” type=”MethodSignatureMatchingRule”>
          <constructor>
            <param name=”methodName” value=”DoWork*” />
            <param name=”parameterTypeNames” dependencyName=”paramTypeNames” />
          </constructor>
        </matchingRule>
        <callHandler name=”Log4NetHandler” type=”Log4NetHandler” />
      </policy>
    </interception>

    <register type=”MyObject”>
      <interceptor type=”VirtualMethodInterceptor” />
      <interceptionBehavior type=”PolicyInjectionBehavior” />
    </register>
  </container>
</unity>
posted @ 2012-08-11 10:29  junchu25  阅读(323)  评论(0编辑  收藏  举报