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>