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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.</div>
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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.</div>
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Regards,</div>
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Chen Liang</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Expert Programmer <chrlsvryptnm@gmail.com><br>
<b>Sent:</b> Friday, February 6, 2026 5:55 PM<br>
<b>To:</b> Chen Liang <chen.l.liang@oracle.com><br>
<b>Cc:</b> classfile-api-dev@openjdk.org <classfile-api-dev@openjdk.org><br>
<b>Subject:</b> [External] : Re: Getter for ClassHierarchyResolverOption in ClassFile?</font>
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<div dir="ltr">I presume this was a no then? If so, that makes sense. I guess I can just reflect and grab it.</div>
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<div dir="ltr" class="x_gmail_attr">On Thu, Feb 5, 2026 at 9:32 PM Expert Programmer <<a href="mailto:chrlsvryptnm@gmail.com">chrlsvryptnm@gmail.com</a>> wrote:<br>
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<div>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. <br>
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Sorry for the duplicate mail.</div>
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<div dir="ltr" class="x_gmail_attr">On Thu, Feb 5, 2026 at 6:44 PM Chen Liang <<a href="mailto:chen.l.liang@oracle.com" target="_blank">chen.l.liang@oracle.com</a>> wrote:<br>
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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?</div>
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-Chen</div>
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<div id="x_m_7420222384755255722m_-3953948963607193099divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> classfile-api-dev <<a href="mailto:classfile-api-dev-retn@openjdk.org" target="_blank">classfile-api-dev-retn@openjdk.org</a>>
on behalf of Expert Programmer <<a href="mailto:chrlsvryptnm@gmail.com" target="_blank">chrlsvryptnm@gmail.com</a>><br>
<b>Sent:</b> Thursday, February 5, 2026 5:39 PM<br>
<b>To:</b> <a href="mailto:classfile-api-dev@openjdk.org" target="_blank">classfile-api-dev@openjdk.org</a> <<a href="mailto:classfile-api-dev@openjdk.org" target="_blank">classfile-api-dev@openjdk.org</a>><br>
<b>Subject:</b> Getter for ClassHierarchyResolverOption in ClassFile?</font>
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<div>Hello,</div>
<div>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. <br>
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<div>Thank you for your time, C.</div>
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