Getting enum values from shadowed enum type

[Egor18]

Hi. I'm trying to get all elements of some enum.
For the enum, which declaration is present in the source code this works fine:

...
CtTypeReference typeRef = expr.getType();
if (typeRef.isEnum())
{
  CtType type = typeRef.getTypeDeclaration();
  if (type instanceof CtEnum)
  {
    System.out.println(((CtEnum) type).getEnumValues());
  }
}

But once the enum is not present in the source (i.e. it is located in some .jar), this approach does not work.
For shadowed type reference .isEnum() always returns false, and the actual type of such enum is CtClass (why not CtEnum?).
So, it is impossible to cast it to CtEnum and call .getEnumValues().

Obviously, to get enum values from enum which is located in .jar, I can check if it's parent is java.lang.Enum and then get all the fields, excluding .ENUM$VALUES, name and ordinal.
But it seems to be quite overcomplicated, because I need to use two different approaches for shadowed and non-shadowed enums.

So can you please explain, why is this happening? Is it possible to get shadowed enum values easier?
Furthermore, I'm interested, are there any similar problems with other data types?

P.S. This partially concerns incremental build.

Thank you.

[monperrus]

But once the enum is not present in the source (i.e. it is located in some .jar), this approach does not work. For shadowed type reference |.isEnum()| always returns false, and the actual type of such enum is |CtClass| (why not |CtEnum|?).

this sounds like a bug. could you propose a failing test case as pull request? thanks!