private IValueProviderContext CreateValueProviderContext([CanBeNull] ValueProviderLink providerLink, IKey key)
{
if (providerLink == null)
{
return(null);
}
var previousLink = providerLink.Previous?.Invoke();
var previousContext = previousLink == null ? null : CreateValueProviderContext(previousLink, key);
return(providerLink.Value.CreateContext(
new ValueProviderObjectContext(
_compoundValueProvider,
(metadata) =>
{
if (previousLink == null)
{
throw new MissingValueProviderException(
$"Tried to call previous provider on '{key}' but no previous provider was registered. " +
"Are you missing a value provider registration?");
}
return
CreateInstances(previousLink.Key, previousLink.Value, previousContext, metadata == null ? null : new[] { metadata }, 1).Single();
},
key.Type,
new ValueProviderObjectContext.AdvancedContext(
key,
_memberSorter,
_metadataResolver,
_parameterConversionService,
_compoundValueProvider,
_fastReflectionUtility),
key.Member)));
}
internal void AddValueProvider(IKey key, IValueProvider valueProvider)
{
if (!_valueProviders.ContainsKey(key))
{
_valueProviders[key] = new ValueProviderLink(valueProvider, key, () => key.PreviousKey == null ? null : GetLink(key.PreviousKey));
}
else
{
var previousKey = _valueProviders[key];
_valueProviders[key] = new ValueProviderLink(valueProvider, key, () => previousKey);
}
}
internal ValueProviderLink GetLink(IKey key)
{
ValueProviderLink link = null;
var concreteType = key.Type;
while ((link?.Value == null || !link.Value.CanHandle(concreteType)) && key != null)
{
link = GetOrDefault(key);
key = key.PreviousKey;
}
return(link);
}