Expression?IParameterMapper.MapParameter(MethodInfo taskMethodInfo, ParameterInfo parameterInfo, ParameterExpression contextParameter)
{
if (parameterInfo.ParameterType == typeof(T))
{
var typedResult = MapParameter(taskMethodInfo, parameterInfo);
if (typedResult != default)
{
return(InlineLambdaVisitor.InlineLambda(
typedResult,
contextParameter
));
}
}
return(null);
}
public static Expression <Func <Task> > ApplyMiddlewares(IServiceProvider serviceProvider, ParameterExpression contextParameter, Expression <Func <Task> > expression)
{
var middlewares = serviceProvider.GetServices <IMiddleware>().ToArray();
foreach (var middleware in middlewares.Reverse())
{
expression = Expression.Lambda <Func <Task> >(
InlineLambdaVisitor.InlineLambda <Func <IMiddleware, ITaskContext, Func <Task>, Task> >(
(middleware, context, next) => middleware.ExecuteAsync(context, next),
Expression.Constant(middleware),
contextParameter,
expression
)
);
}
return(expression);
}