public Task TryCreateAsync()

in src/WebJobs.Extensions.CosmosDB/Trigger/CosmosDBTriggerAttributeBindingProviderGenerator.cs [40:79]
27 lines of code
5 McCabe index (conditional complexity)

        public Task<ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
        {
            CosmosDBTriggerAttribute cosmosDBTriggerAttribute = context.Parameter.GetCustomAttribute<CosmosDBTriggerAttribute>(inherit: false);

            if (cosmosDBTriggerAttribute == null)
            {
                return Task.FromResult<ITriggerBinding>(null);
            }

            Type documentType = CosmosDBTriggerAttributeBindingProviderGenerator.GetParameterType(context.Parameter);

            if (typeof(JArray).IsAssignableFrom(documentType)
                || typeof(JObject[]).IsAssignableFrom(documentType))
            {
                documentType = typeof(JObject); // When binding to JArray, use JObject as contract.
            }

            if (typeof(string).IsAssignableFrom(documentType))
            {
                documentType = typeof(JObject);
            }

            Type baseType = typeof(CosmosDBTriggerAttributeBindingProvider<>);

            Type genericBindingType = baseType.MakeGenericType(documentType);

            Type[] typeArgs = { typeof(INameResolver), typeof(CosmosDBOptions), typeof(CosmosDBExtensionConfigProvider), typeof(IDrainModeManager), typeof(ILoggerFactory) };

            ConstructorInfo constructor = genericBindingType.GetConstructor(typeArgs);

            object[] constructorParameterValues = { _nameResolver, _options, _configProvider, _drainModeManager, _loggerFactory };

            object cosmosDBTriggerAttributeBindingProvider = constructor.Invoke(constructorParameterValues);

            MethodInfo methodInfo = genericBindingType.GetMethod(nameof(CosmosDBTriggerAttributeBindingProvider<dynamic>.TryCreateAsync));

            object[] methodParameterValues = { context };

            return (Task<ITriggerBinding>)methodInfo.Invoke(cosmosDBTriggerAttributeBindingProvider, methodParameterValues);
        }