public ConstructorInfo Resolve(Type type, params object[] args)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (args?.Length == 0)
{
var availableConstructors = type.GetConstructors().ToList();
// Ignore any constructors that have a parameter with the type being created (a copy constructor)
var validConstructors =
availableConstructors.Where(x => x.GetParameters().Any(y => y.ParameterType == type) == false)
.OrderBy(x => x.GetParameters().Length)
.ToList();
var bestConstructor = validConstructors.FirstOrDefault();
if (bestConstructor == null)
{
string message;
if (availableConstructors.Count > validConstructors.Count)
{
message = string.Format(
CultureInfo.CurrentCulture,
Resources.ConstructorResolver_NoValidConstructorFound,
type.FullName);
}
else
{
message = string.Format(
CultureInfo.CurrentCulture,
Resources.ConstructorResolver_NoPublicConstructorFound,
type.FullName);
}
throw new MissingMemberException(message);
}
return bestConstructor;
}
// Search for a matching constructor
var types = args.Select(x => x.GetType()).ToArray();
var constructor = type.GetConstructor(types);
if (constructor == null)
{
var parameterTypes = types.Select(x => x.FullName).Aggregate((current, next) => current + ", " + next);
var message = string.Format(
CultureInfo.CurrentCulture,
"No constructor found matching type {0} with parameters[{1}].",
type.FullName,
parameterTypes);
throw new MissingMemberException(message);
}
return constructor;
}
}
