public override Task Invoke(ParameterAspectContext context, ParameterAspectDelegate next)
{
if (context.Parameter.Value == null)
{
throw new ArgumentNullException(context.Parameter.Name, Message);
}
return(next(context));
}
public async override Task Invoke(AspectContext context, AspectDelegate next)
{
var selector = (IParameterInterceptorSelector)context.ServiceProvider.GetService(typeof(IParameterInterceptorSelector));
if (selector == null)
{
throw new InvalidOperationException("Cannot resolve ParameterInterceptorSelector.");
}
var parameters = context.GetParameters();
var count = parameters.Count;
if (count > 0)
{
var parameterAspectInvoker = new ParameterAspectInvoker();
for (var i = 0; i < count; i++)
{
var parameter = parameters[i];
var interceptors = selector.Select(parameter.ParameterInfo);
if (interceptors.Length > 0)
{
var parameterAspectContext = new ParameterAspectContext(context, parameter);
foreach (var interceptor in interceptors)
{
parameterAspectInvoker.AddDelegate(interceptor.Invoke);
}
await parameterAspectInvoker.Invoke(parameterAspectContext);
parameterAspectInvoker.Reset();
}
}
}
await next(context);
var returnParameter = context.GetReturnParameter();
var returnInterceptors = selector.Select(returnParameter.ParameterInfo);
if (returnInterceptors.Length > 0)
{
var returnParameterAspectContext = new ParameterAspectContext(context, returnParameter);
var returnParameterAspectInvoker = new ParameterAspectInvoker();
foreach (var interceptor in returnInterceptors)
{
returnParameterAspectInvoker.AddDelegate(interceptor.Invoke);
}
await returnParameterAspectInvoker.Invoke(returnParameterAspectContext);
}
}
public abstract Task Invoke(ParameterAspectContext context, ParameterAspectDelegate next);
public Task Invoke(ParameterAspectContext context)
{
return(Build()(context));
}
