private InstanceProducer TryBuildInstanceProducerForCollection(Type serviceType)
{
if (!Helpers.IsGenericCollectionType(serviceType))
{
return(null);
}
// We don't auto-register collections for ambiguous types.
if (Helpers.IsAmbiguousOrValueType(serviceType.GetGenericArguments()[0]))
{
return(null);
}
lock (this.emptyAndRedirectedCollectionRegistrationCache)
{
InstanceProducer producer;
// We need to cache these generated producers, to prevent getting duplicate producers; which
// will cause (incorrect) diagnostic warnings.
if (!this.emptyAndRedirectedCollectionRegistrationCache.TryGetValue(serviceType, out producer))
{
producer = this.TryBuildCollectionInstanceProducer(serviceType)
?? this.TryBuildEmptyCollectionInstanceProducerForEnumerable(serviceType);
this.emptyAndRedirectedCollectionRegistrationCache[serviceType] = producer;
}
return(producer);
}
}