C# ILGenerator.ForEach方法代码示例

 private static void ExcepionIntercept(ILGenerator ilGenerator, IInterceptor[] interceptors, LocalBuilder[] local)
 {
     var excepionInterceptors = interceptors.GetExcepionInterceptors();
     if (!excepionInterceptors.Any())
     {
         ilGenerator.Emit(OpCodes.Throw);
         return;
     }
     var invocationType = InternalDynamicTypeProvider.CreateType<IExceptionInvocation>();
     var setException = invocationType.GetMethod("set_Exception");
     var setInterceptedType = invocationType.GetMethod("set_InterceptedType");
     var setInterceptedInstance = invocationType.GetMethod("set_InterceptedInstance");
     var getExceptionHandled = invocationType.GetMethod("get_ExceptionHandled");
     var getExcepionInterceptMethod = typeof(IExceptionInterceptor).GetMethod("OnExcepion");
     var getExcepionInterceptorsMethod = typeof(InterceptorExtends).GetMethod("GetExcepionInterceptors");
     var exceptionLocal = ilGenerator.DeclareLocal(typeof(Exception));
     var interceptorLocal = ilGenerator.DeclareLocal(typeof(IExceptionInterceptor[]));
     var invocationLocal = ilGenerator.DeclareLocal(invocationType);
     var breakExceptionLable = ilGenerator.DefineLabel();
     ilGenerator.StoreLocal(exceptionLocal).LoadLocal(local[0]).Call(getExcepionInterceptorsMethod).StoreLocal(interceptorLocal);
     ilGenerator.New(invocationType.GetConstructor(Type.EmptyTypes)).StoreLocal(invocationLocal);
     ilGenerator.LoadLocal(invocationLocal).LoadLocal(exceptionLocal).Callvirt(setException);
     ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[2]).Callvirt(setInterceptedType);
     ilGenerator.LoadLocal(invocationLocal).This().Callvirt(setInterceptedInstance);
     ilGenerator.ForEach(excepionInterceptors, (il, interceptor, index) =>
     il.LoadLocal(invocationLocal).Callvirt(getExceptionHandled).False(breakExceptionLable).LoadLocal(interceptorLocal).LoadArrayItem(index).
     LoadLocal(invocationLocal).Callvirt(getExcepionInterceptMethod)).MarkLabelFor(breakExceptionLable);
 }

        private static void MethodIntercept(ILGenerator ilGenerator, MethodInfo methodInfo, IInterceptor[] interceptors, LocalBuilder[] local,
            bool[] boolean, Action<ILGenerator> method)
        {
            var methodInterceptors = interceptors.GetMethodInterceptor();
            if (!methodInterceptors.Any())
            {
                method(ilGenerator);
                return;
            }
            var invocationType = InternalDynamicTypeProvider.CreateType<IMethodInvocation>();
            var returnParameterType = InternalDynamicTypeProvider.CreateType<IReturnParameter>();

            var parameterType = InternalDynamicTypeProvider.CreateType<IParameter>();
            var setParameters = invocationType.GetMethod("set_Parameters");
            var setParameterValue = parameterType.GetMethod("set_Value");
            var getParameterValue = parameterType.GetMethod("get_Value");
            var setParameterName = parameterType.GetMethod("set_Name");
            var setParameterInfo = parameterType.GetMethod("set_ParameterInfo");
            var getParameterName = typeof(ParameterInfo).GetMethod("get_Name");
            var getCurrentParameter = typeof(InterceptorExtends).GetMethod("GetCurrentParameter");

            var setReturnParameter = invocationType.GetMethod("set_ReturnParameter");
            var getReturnValue = returnParameterType.GetMethod("get_Value");
            var setReturnType = returnParameterType.GetMethod("set_ReturnType");
            var setReturnValue = returnParameterType.GetMethod("set_Value");
            var returnParameterLocal = ilGenerator.DeclareLocal(returnParameterType);
            var getReturnType = typeof(MethodInfo).GetMethod("get_ReturnType");
            var setInterceptedMethod = invocationType.GetMethod("set_InterceptedMethod");
            var setInterceptedType = invocationType.GetMethod("set_InterceptedType");
            var setInterceptedInstance = invocationType.GetMethod("set_InterceptedInstance");
            var getExecutedHandled = invocationType.GetMethod("get_ExecutedHandled");
            var getGetMethodInterceptor = typeof(InterceptorExtends).GetMethod("GetMethodInterceptor");
            var getGetExecutedMethodInterceptor = typeof(InterceptorExtends).GetMethod("GetExecutedMethodInterceptor");
            var onMethodExecuting = typeof(IMethodInterceptor).GetMethod("OnMethodExecuting");
            var onMethodExecuted = typeof(IMethodInterceptor).GetMethod("OnMethodExecuted");
            var interceptorLocal = ilGenerator.DeclareLocal(typeof(IMethodInterceptor[]));
            var executedInterceptorLocal = ilGenerator.DeclareLocal(typeof(IMethodInterceptor[]));


            var parametersLocal = ilGenerator.DeclareLocal(typeof(IParameter[]));
         


            var invocationLocal = ilGenerator.DeclareLocal(invocationType);
            var endLable = ilGenerator.DefineLabel();
            ilGenerator.LoadLocal(local[0]).Call(getGetMethodInterceptor).StoreLocal(interceptorLocal);
            ilGenerator.LoadLocal(local[0]).Call(getGetExecutedMethodInterceptor).StoreLocal(executedInterceptorLocal);
            ilGenerator.New(invocationType.GetConstructor(Type.EmptyTypes)).StoreLocal(invocationLocal);
            ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[1]).Callvirt(setInterceptedMethod);
            ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[2]).Callvirt(setInterceptedType);
            ilGenerator.LoadLocal(invocationLocal).This().Callvirt(setInterceptedInstance);
            ilGenerator.New(returnParameterType.GetConstructor(Type.EmptyTypes)).StoreLocal(returnParameterLocal);
            if (boolean[0]) ilGenerator.LoadLocal(returnParameterLocal).LoadLocal(local[1]).Callvirt(getReturnType).Callvirt(setReturnType);
            else ilGenerator.LoadLocal(returnParameterLocal).Typeof(typeof(void)).Callvirt(setReturnType);
            ilGenerator.LoadLocal(invocationLocal).LoadLocal(returnParameterLocal).Callvirt(setReturnParameter);

            ilGenerator.NewArray(typeof(IParameter), methodInfo.GetParameters().Length).StoreLocal(parametersLocal);
            ilGenerator.ForEach(methodInfo.GetParameterTypes(), (il, arg, i) =>
            {
                var argLocal = ilGenerator.DeclareLocal(parameterType);
                ilGenerator.New(parameterType.GetConstructor(Type.EmptyTypes)).StoreLocal(argLocal);
                ilGenerator.LoadLocal(argLocal).LoadArgument(i + 1).Box(arg).Callvirt(setParameterValue);
                ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(i).Call(getCurrentParameter).Callvirt(setParameterInfo);
                ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(i).Call(getCurrentParameter).Callvirt(getParameterName).Callvirt(setParameterName);
                ilGenerator.LoadLocal(parametersLocal).LoadInt(i).LoadLocal(argLocal).SetArrayItemRef();
            });
            ilGenerator.LoadLocal(invocationLocal).LoadLocal(parametersLocal).Callvirt(setParameters);

            ilGenerator.ForEach(methodInterceptors, (_, interceptor, index) =>
            _.LoadLocal(interceptorLocal).LoadArrayItem(index).LoadLocal(invocationLocal)
            .Callvirt(onMethodExecuting).LoadLocal(invocationLocal).Callvirt(getExecutedHandled).False(endLable));

            ilGenerator.ForEach(methodInfo.GetParameterTypes(), (il, arg, i) =>
            {
                ilGenerator.LoadLocal(parametersLocal).LoadArrayItem(i).Callvirt(getParameterValue).UnBox(arg).StroeArgument(i + 1);
            });
            method(ilGenerator);


            if (boolean[0]) ilGenerator.LoadLocal(returnParameterLocal).LoadLocal(local[3]).Callvirt(setReturnValue);
            ilGenerator.ForEach(methodInterceptors.OrderBy(i => i.ExecutedOrder), (_, interceptor, index) =>
            _.LoadLocal(executedInterceptorLocal).LoadArrayItem(index).LoadLocal(invocationLocal).
            Callvirt(onMethodExecuted).LoadLocal(invocationLocal).Callvirt(getExecutedHandled).False(endLable));
            ilGenerator.MarkLabelFor(endLable);
            if (boolean[0]) ilGenerator.LoadLocal(returnParameterLocal).Callvirt(getReturnValue).StoreLocal(local[3]);
        }

 private static void ParameterIntercept(ILGenerator ilGenerator, IInterceptor[] interceptors,
     LocalBuilder[] local, MethodInfo method)
 {
     var parameterInterceptors = interceptors.GetParameterInterceptors();
     if (!parameterInterceptors.Any()) return;
     var invocationType = InternalDynamicTypeProvider.CreateType<IParameterInvocation>();
     var parameterType = InternalDynamicTypeProvider.CreateType<IParameter>();
     var setInterceptedMethod = invocationType.GetMethod("set_InterceptedMethod");
     var setInterceptedType = invocationType.GetMethod("set_InterceptedType");
     var setInterceptedInstance = invocationType.GetMethod("set_InterceptedInstance");
     var setParameters = invocationType.GetMethod("set_Parameters");
     var setValue = parameterType.GetMethod("set_Value");
     var getValue = parameterType.GetMethod("get_Value");
     var setName = parameterType.GetMethod("set_Name");
     var setParameterInfo = parameterType.GetMethod("set_ParameterInfo");
     var getName = typeof(ParameterInfo).GetMethod("get_Name");
     var getParameterInterceptors = typeof(InterceptorExtends).GetMethod("GetParameterInterceptors");
     var getCurrentParameter = typeof(InterceptorExtends).GetMethod("GetCurrentParameter");
     var onIntercept = typeof(IParameterInterceptor).GetMethod("OnParameterExecuting");
     var interceptorLocal = ilGenerator.DeclareLocal(typeof(IParameterInterceptor[]));
     var parametersLocal = ilGenerator.DeclareLocal(typeof(IParameter[]));
     ilGenerator.LoadLocal(local[0]).Call(getParameterInterceptors).StoreLocal(interceptorLocal);
     var invocationLocal = ilGenerator.DeclareLocal(invocationType);
     ilGenerator.New(invocationType.GetConstructor(Type.EmptyTypes)).StoreLocal(invocationLocal);
     ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[1]).Callvirt(setInterceptedMethod);
     ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[2]).Callvirt(setInterceptedType);
     ilGenerator.LoadLocal(invocationLocal).This().Callvirt(setInterceptedInstance);
     ilGenerator.ForEach(parameterInterceptors, (_, interceptor, i) =>
     {
         var parameters = method.GetParameters().Where(p => p.GetCustomAttributes(false).Any(c => c.GetType() == interceptor.GetType())).ToArray();
         ilGenerator.NewArray(typeof(IParameter), parameters.Length).StoreLocal(parametersLocal);
         ilGenerator.ForEach(parameters, (__, parameter, j) =>
         ilGenerator.ForEach(method.GetParameters(), (___, arg, k) =>
         {
             if (arg == parameter)
             {
                 var argLocal = ilGenerator.DeclareLocal(parameterType);
                 ilGenerator.New(parameterType.GetConstructor(Type.EmptyTypes)).StoreLocal(argLocal);
                 ilGenerator.LoadLocal(argLocal).LoadArgument(k + 1).Box(arg.ParameterType).Callvirt(setValue);
                 ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(k).Call(getCurrentParameter).Callvirt(setParameterInfo);
                 ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(k).Call(getCurrentParameter).Callvirt(getName).Callvirt(setName);
                 ilGenerator.LoadLocal(parametersLocal).LoadInt(j).LoadLocal(argLocal).SetArrayItemRef();
             }
         }));
         ilGenerator.LoadLocal(invocationLocal).LoadLocal(parametersLocal).Callvirt(setParameters);
         ilGenerator.LoadLocal(interceptorLocal).LoadArrayItem(i).LoadLocal(invocationLocal).Callvirt(onIntercept);
         ilGenerator.ForEach(parameters, (__, parameter, j) =>
         ilGenerator.ForEach(method.GetParameters(), (___, arg, k) =>
         {
             if (arg == parameter)
             {
                 ilGenerator.LoadLocal(parametersLocal).LoadArrayItem(j).Callvirt(getValue).UnBox(arg.ParameterType).StroeArgument(k + 1);
             }
         }));
     });
 }