/// <summary>
/// The implementation method that constructs and/or returns the
/// implementation instance.
/// </summary>
/// <param name="serviceConstructorRequest">This argument is required here.</param>
/// <returns>Should be null only if the service is not constructed successfully:
/// note that this may result in a resolver or constructor error.</returns>
/// <exception cref="ArgumentNullException"></exception>
internal object Get(ServiceConstructorRequest serviceConstructorRequest)
{
if (serviceConstructorRequest == null)
{
throw new ArgumentNullException(nameof(serviceConstructorRequest));
}
lock (syncLock) {
checkIsDisposedUnsafe();
if (!IsSingleton)
{
ConstructedAt = DateTime.UtcNow;
object instance = InvokeFactory(serviceConstructorRequest);
if (dependencies != null)
{
dependencies.TryAddRange(serviceConstructorRequest.Dependencies);
}
else
{
dependencies
= new MultiDictionary <Type, Type>(
serviceConstructorRequest.Dependencies,
serviceConstructorRequest.Dependencies.Comparer);
}
return(instance);
}
if (IsSingletonSet)
{
return(singleton);
}
ConstructedAt = DateTime.UtcNow;
singleton = InvokeFactory(serviceConstructorRequest);
IsSingletonSet = true;
dependencies
= new MultiDictionary <Type, Type>(
serviceConstructorRequest.Dependencies,
serviceConstructorRequest.Dependencies.Comparer);
return(singleton);
}
object InvokeFactory(ServiceConstructorRequest request)
=> factory != null
? factory(serviceProvider)
: ServiceConstructorMethods.TryConstruct(
ImplementationType,
out object result,
request,
serviceProvider,
null,
false,
RequireConstructorAttributes,
ConstructorAttributeTypes)
? result
: null;
}