I got Exception: Could not resolve class

[Øystein Myhre Andersen]

I tried to implement 'ClassHierarchyInfo' but I got "Sealed type
ClassHierarchyInfo cannot be super type
of MyClassHierarchyInfo as it is from a different package or split package
or module"


I misses a method to instantiate 'ClassHierarchyInfo' to deliver the result
from 'getClassInfo'


May be you should add a method like:


'static ClassHierarchyInfo of(ClassDesc subClass, ClassDesc superClass,
boolean isInterface)'


to the 'ClassHierarchyInfo'


- Øystein

On Fri, Oct 18, 2024 at 3:46 PM Chen Liang <chen.l.liang at oracle.com> wrote:

> Thanks for sharing Oystein. The problem is that
> ClassHierarchyResolver.of(Collection, Map) takes the immediate values in
> the argument and ignores subsequent updates, which is how most ClassFile
> APIs work, unfortunately. (The same thing happens if you try to do so for
> AnnotationValue.OfArray or RuntimeVisibleAnnotationsAttribute)
>
> I recommend you return a ClassHierarchyResolver implementation of your
> own, that returns the real-time results from your ClassHierarchy static
> fields.
>
> Regards, Chen
> ------------------------------
> *From:* classfile-api-dev <classfile-api-dev-retn at openjdk.org> on behalf
> of Øystein Myhre Andersen <o.myhre at gmail.com>
> *Sent:* Friday, October 18, 2024 3:02 AM
> *To:* Chen Liang <liangchenblue at gmail.com>
> *Cc:* classfile-api-dev <classfile-api-dev at openjdk.org>
> *Subject:* Re: I got Exception: Could not resolve class
>
> Here is the link:
>
> https://github.com/portablesimula/SimulaCompiler2/blob/main/Simula/src/simula/compiler/utilities/ClassHierarchy.java
>
> I use:
> openjdk version "24-ea" 2025-03-18
> OpenJDK Runtime Environment (build 24-ea+16-1800)
> OpenJDK 64-Bit Server VM (build 24-ea+16-1800, mixed mode, sharing)
>
> - Øystein
>
> On Fri, Oct 18, 2024 at 9:51 AM Chen Liang <liangchenblue at gmail.com>
> wrote:
>
> Hi Øystein, can you share a link to your ClassHierarchy code? ClassFile
> API has a layer of caching for the ClassHierarchyResolver it uses, which
> can lead to it not updating to the latest information in your
> ClassHierarchy.
>
> Chen
>
> On Fri, Oct 18, 2024 at 2:40 AM Øystein Myhre Andersen <o.myhre at gmail.com>
> wrote:
>
> Below is a snippet of my code:
>
>
> public byte[] buildClassFile() {
>
> ClassDesc CD_ThisClass = currentClassDesc();
>
> ClassDesc CD_SuperClass = superClassDesc();
>
> ClassHierarchy.addClassToSuperClass(CD_ThisClass, CD_SuperClass);
>
> try {
>
> byte[] bytes =
> ClassFile.of(ClassFile.ClassHierarchyResolverOption.of(ClassHierarchy.getResolver())).build(CD_ThisClass,
>
>
> ...
>
> return(bytes);
>
> } catch(Throwable e) {
>
> ClassHierarchyResolver resolver = ClassHierarchy.getResolver();
>
> ClassDesc desc = ClassDesc.of("simulaFEC.CLASS_CHECKER1_semchecker1_exp");
>
> System.out.println("classInfo("+desc+") = " + resolver.getClassInfo(desc
> ));
>
>
> e.printStackTrace();
>
> return null;
>
> }
>
> }
>
> When I run this code I get:
>
>
> classInfo(ClassDesc[CLASS_CHECKER1_semchecker1_exp]) =
> ClassHierarchyInfoImpl[superClass=ClassDesc[RTS_CLASS], isInterface=false]
>
> java.lang.IllegalArgumentException: Could not resolve class
> CLASS_CHECKER1_semchecker1_exp
>
> at
> java.base/jdk.internal.classfile.impl.ClassHierarchyImpl.resolve(ClassHierarchyImpl.java:76)
>
> at
> java.base/jdk.internal.classfile.impl.ClassHierarchyImpl.isInterface(ClassHierarchyImpl.java:86)
>
> at
> java.base/jdk.internal.classfile.impl.StackMapGenerator$Type.mergeReferenceFrom(StackMapGenerator.java:1334)
>
> .....
>
> I use my own 'resolver' which answers that 'CLASS_CHECKER1_semchecker1_exp'
> is a subclass of 'RTS_CLASS'.
>
> I don't understand this.
>
>
> - Øystein Myhre Andersen
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.openjdk.org/pipermail/classfile-api-dev/attachments/20241019/f17c862e/attachment-0001.htm>