private static ILGenerator MakeGenericMethod(ILGenerator ilGenerator, MethodInfo method,
LocalBuilder interceptedMethodLocal)
{
if (method.IsGenericMethod)
{
var genericArguments = method.GetGenericArguments();
var genericArgumentsLocal = ilGenerator.DeclareLocal(typeof(Type[]));
var makeGenericMethod = typeof(MethodInfo).GetMethod("MakeGenericMethod");
ilGenerator.NewArray(typeof(Type), genericArguments.Length).StoreLocal(genericArgumentsLocal).
ForEach(genericArguments, (_, arg, i) =>
ilGenerator.LoadLocal(genericArgumentsLocal).LoadInt(i).Typeof(arg).SetArrayItemRef()).
LoadLocal(interceptedMethodLocal).LoadLocal(genericArgumentsLocal).
Callvirt(makeGenericMethod).StoreLocal(interceptedMethodLocal);
}
return ilGenerator;
}
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);
}
}));
});
}