IEnumerable<RegistrationFactory> RegistrationConvention.GetTypeRegistrations(RegistrationCatalog catalog,
Type type)
{
for (int i = 0; i < _conventions.Length; i++)
{
RegistrationFactory[] registrations = _conventions[i].GetTypeRegistrations(catalog, type).ToArray();
if (registrations.Length > 0)
return registrations;
}
return Enumerable.Empty<RegistrationFactory>();
}
public IEnumerable<RegistrationFactory> GetTypeRegistrations(RegistrationCatalog catalog, Type type)
{
if (type.IsConcreteType())
{
RegistrationFactory[] defaultConstructor = GetDefaultConstructor(type).ToArray();
if (defaultConstructor.Any())
return defaultConstructor;
RegistrationFactory[] greediestConstructor = GetGreediestConstructor(catalog, type).ToArray();
if (greediestConstructor.Any())
return greediestConstructor;
}
return Enumerable.Empty<RegistrationFactory>();
}
IEnumerable<RegistrationFactory> GetConstructorRegistrations(RegistrationCatalog catalog, Type type,
ConstructorInfo constructorInfo, IEnumerable<Type> dependencies)
{
ParameterInfo[] parameters = constructorInfo.GetParameters();
RegistrationFactory[] arguments = dependencies
.Select((x, index) => catalog.GetRegistration(parameters[index].ParameterType)).ToArray();
if (parameters.Length == arguments.Length)
{
RegistrationFactory factory = ConstructorRegistrationFactory.Create(type, constructorInfo, arguments);
return arguments.Concat(Enumerable.Repeat(factory, 1));
}
return Enumerable.Empty<RegistrationFactory>();
}
IEnumerable<RegistrationFactory> GetGreediestConstructor(RegistrationCatalog catalog, Type type)
{
IOrderedEnumerable<ConstructorInfo> candidates = type.GetConstructors()
.OrderByDescending(x => x.GetParameters().Length);
foreach (ConstructorInfo candidate in candidates)
{
Type[] dependencies = candidate.GetParameters().Select(x => x.ParameterType).ToArray();
RegistrationFactory[] registrations =
GetConstructorRegistrations(catalog, type, candidate, dependencies).ToArray();
if (registrations.Any())
return registrations;
}
return Enumerable.Empty<RegistrationFactory>();
}
