[External] : Re: Getter for ClassHierarchyResolverOption in ClassFile?

[Expert Programmer]

Okay, I understand. Thank you for your time.

On Fri, Feb 6, 2026, 6:09 PM Chen Liang <chen.l.liang at oracle.com> wrote:

> Hi, I indeed think by the design philosophy of the ClassFile API, this
> means a no - even if you have a ClassHierarchyResolver, it would not be
> useful, because ClassHierarchyInfo does not have accessors for
> non-ClassFile-API users to inspect; it only has two factory methods that
> create objects only distinguishable by the ClassFile API.
>
> I think if you are creating a library, ideally you should declare your own
> interface for getting class hierarchy, and you create a ClassFile with a
> CHROption using a CHR encapsulating your interface instance.
>
> Regards,
> Chen Liang
> ------------------------------
> *From:* Expert Programmer <chrlsvryptnm at gmail.com>
> *Sent:* Friday, February 6, 2026 5:55 PM
> *To:* Chen Liang <chen.l.liang at oracle.com>
> *Cc:* classfile-api-dev at openjdk.org <classfile-api-dev at openjdk.org>
> *Subject:* [External] : Re: Getter for ClassHierarchyResolverOption in
> ClassFile?
>
> I presume this was a no then? If so, that makes sense. I guess I can just
> reflect and grab it.
>
> On Thu, Feb 5, 2026 at 9:32 PM Expert Programmer <chrlsvryptnm at gmail.com>
> wrote:
>
> While it is possible to request a ClassHierarchyResolver directly from the
> user, it seems rather pointless as I am already passing the ClassFile
> around to have it available for parsing and transformations, and thus
> passing the ClassHierarchyResolver potentially contained within around. If
> you don't think it's needed I completely understand, I just figured it
> wouldn't hurt to ask.
> Sorry for the duplicate mail.
>
> On Thu, Feb 5, 2026 at 6:44 PM Chen Liang <chen.l.liang at oracle.com> wrote:
>
> Hello, I think ClassFile is designed so that a user create their own
> instance to perform operations. I don't envision using it as an argument to
> non-ClassFile-API endpoints. Can't you request a ClassHierarchyResolver
> directly?
>
> -Chen
> ------------------------------
> *From:* classfile-api-dev <classfile-api-dev-retn at openjdk.org> on behalf
> of Expert Programmer <chrlsvryptnm at gmail.com>
> *Sent:* Thursday, February 5, 2026 5:39 PM
> *To:* classfile-api-dev at openjdk.org <classfile-api-dev at openjdk.org>
> *Subject:* Getter for ClassHierarchyResolverOption in ClassFile?
>
> Hello,
> Has it been considered before to add any form of getters for Options in a
> ClassFile? I would like to access the ClassHierarchyResolverOption from the
> ClassFile, to allow determining if a given class extends from / implements
> another.
> Thank you for your time, C.
>
>
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