internal static object CreateInstance([NotNull] Type type, [NotNull] ResolutionFunction resolutionFunction)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (resolutionFunction == null)
{
throw new ArgumentNullException(nameof(resolutionFunction));
}
if (TryInstantiateViaBakedData(type, resolutionFunction, out var bakedDataInstance))
{
return(bakedDataInstance);
}
if (DiSettings.TryGetInstance(out var settings) && settings.UseBakedData)
{
object PocoResolutionFunction(Type resolvedType)
{
if (resolutionFunction(resolvedType, out var resolvedObject))
{
return(resolvedObject);
}
throw new DependencyNotRegisteredException(resolvedType);
}
if (BakedInjection.TryInstantiate(type, PocoResolutionFunction, out var bakedInstance))
{
return(bakedInstance);
}
}
if (!TryGetInjectableConstructorParameters(type, out var parameters))
{
throw new ArgumentException($"Type {type} does not have an injectable constructor.");
}
var arguments = Injection.RentArgumentsArray(parameters.Count);
for (var index = 0; index < parameters.Count; index++)
{
var parameterType = parameters[index].ParameterType;
if (resolutionFunction(parameterType, out var dependency))
{
arguments[index] = dependency;
}
else
{
Injection.ReturnArgumentsArray(arguments);
throw new DependencyNotRegisteredException(parameterType);
}
}
var instance = Activator.CreateInstance(type, arguments);
Injection.ReturnArgumentsArray(arguments);
return(instance);
}
private static bool TryInstantiateViaBakedData([NotNull] Type type,
[NotNull] ResolutionFunction resolutionFunction, out object instance)
{
if (DiSettings.TryGetInstance(out var settings) && settings.UseBakedData)
{
object PocoResolutionFunction(Type resolvedType)
{
if (resolutionFunction(resolvedType, out var resolvedObject))
{
return(resolvedObject);
}
throw new DependencyNotRegisteredException(resolvedType);
}
if (BakedInjection.TryInstantiate(type, PocoResolutionFunction, out instance))
{
return(true);
}
}
instance = default;
return(false);
}
