public static void Reset()
{
GlobalInstances.Clear();
GlobalMembers.Clear();
GlobalNames.Clear();
GlobalFactories.Clear();
Register <byte>(1);
Register <sbyte>(1);
Register <short>(1);
Register <ushort>(1);
Register <int>(1);
Register <uint>(1);
Register <long>(1);
Register <ulong>(1);
Register <float>(1.0f);
Register <double>(1.0);
Register("Foo");
Register(Guid.Empty);
Register(new DateTime(2020, 1, 1));
}
private static object CreateObject(Type t, IDictionary <Type, object> instances)
{
if (instances.TryGetValue(t, out var existing) ||
GlobalInstances.TryGetValue(t, out existing))
{
return(existing);
}
if (t.IsInterface)
{
if (t.IsGenericType && (t.GetGenericTypeDefinition() == typeof(IList <>) || t.GetGenericTypeDefinition() == typeof(IEnumerable <>)))
{
var result = (IList)Activator.CreateInstance(typeof(List <>).MakeGenericType(t.GenericTypeArguments), 1);
instances[t] = result;
FillList(result, t, instances);
return(result);
}
Debug.Assert(false, $"Can't create instance of interface {t}");
}
if (IsListType(t))
{
var result = (IList)Activator.CreateInstance(t, 1);
instances[t] = result;
FillList(result, t, instances);
return(result);
}
if (t.IsClass || (t.IsValueType && !t.IsEnum))
{
var ctors = t.GetConstructors().OrderBy(a => a.GetParameters().Length).ToList();
object result = null;
if (ctors.Any())
{
var parameters = ctors[0].GetParameters().Select(a => CreateObject(a.ParameterType, instances)).ToArray();
result = Activator.CreateInstance(t, parameters);
}
else if (GlobalFactories.TryGetValue(t, out var factory))
{
result = factory();
}
else
{
result = Activator.CreateInstance(t);
Debug.Assert(result != null, $"Unable to create instance of {t}");
}
instances[t] = result;
foreach (var property in t.GetProperties())
{
if (GlobalMembers.TryGetValue(Tuple.Create(property.DeclaringType, property.PropertyType, property.Name), out var value))
{
property.SetValue(result, value);
}
else if (property.SetMethod != null)
{
property.SetValue(result,
GlobalNames.TryGetValue((property.Name, property.PropertyType), out value)
? value
: CreateObject(property.PropertyType, instances));
}
else if (IsListType(property.PropertyType))
{
var lst = (IList)property.GetValue(result);
FillList(lst, property.PropertyType, instances);
}
}
return(result);
}
return(instances[t] = Activator.CreateInstance(t));
}
