private static IEnumerable <IInstanceCreator> GetConstructorCreators(Type targetType, Type availableType)
{
Debug.Assert(targetType != null);
Debug.Assert(availableType != null);
Debug.Assert(!availableType.IsAbstract);
if (targetType.ContainsGenericParameters)
{
Type definition = targetType.IsGenericParameter ? targetType : targetType.GetGenericTypeDefinition( );
var bindings = new BindingCollection(Binding.EmptyBindings);
GenericTypeResolver.GetAssignedGenericArguments(bindings, availableType, definition);
foreach (var binding in bindings)
{
Type resolvedType =
definition.IsGenericParameter
? Binding.ForArgument(binding, definition).Type
: GenericTypeResolver.MakeConcreteType(definition, binding);
targetType = resolvedType;
break;
}
}
var creators = new List <IInstanceCreator>( );
// If type is an enumeration, get creator for enum values.
if (availableType.IsEnum || availableType == typeof(bool))
{
creators.AddRange(WeakInstanceCreator.ForEnum(availableType));
}
// Otherwise, get creator for any default constructor.
else if (Constraint.HasDefaultConstructor(availableType))
{
creators.Add(WeakInstanceCreator.ForType(availableType));
}
// Get creators for any parameterized constructors.
var parameterizedConstructors = availableType.GetConstructors( ).Where((c) => c.GetParameters( ).Length > 0).ToArray( );
if (parameterizedConstructors.Length < 3)
{
foreach (var constructor in parameterizedConstructors)
{
creators.AddRange(TypeCreator.GetMethodCreators(targetType, constructor));
}
}
return(creators);
}
