[External] : how does one get value of ConstantValueAttribute?

[Chen Liang]

This is an interface method, which is implicitly public.  You should be able to call it without any problem. If there is a compile error, can you share the snippet of code that you managed to reproduce an error?
________________________________
From: Mark Roberts <markro at cs.washington.edu>
Sent: Monday, November 25, 2024 4:44 PM
To: Chen Liang <chen.l.liang at oracle.com>; classfile-api-dev at openjdk.org <classfile-api-dev at openjdk.org>
Subject: RE: [External] : how does one get value of ConstantValueAttribute?


Sorry – typo:  ‘constant()’



From: Chen Liang <chen.l.liang at oracle.com<mailto:chen.l.liang at oracle.com>>
Sent: Monday, November 25, 2024 2:35 PM
To: Mark Roberts <markro at cs.washington.edu<mailto:markro at cs.washington.edu>>; classfile-api-dev at openjdk.org<mailto:classfile-api-dev at openjdk.org>
Subject: Re: [External] : how does one get value of ConstantValueAttribute?



Hi Mark,

I don't understand your question.  Nowhere in any document mentions there's a "const" in ConstantValueAttribute.  Its Javadoc is available here:

https://download.java.net/java/early_access/jdk24/docs/api/java.base/java/lang/classfile/attribute/ConstantValueAttribute.html<https://urldefense.com/v3/__https://download.java.net/java/early_access/jdk24/docs/api/java.base/java/lang/classfile/attribute/ConstantValueAttribute.html__;!!ACWV5N9M2RV99hQ!LL2vfYLl-_GR0xLXyaydxqZog5OPnJudBuAZUaFkt9ojJHORh2WZryU1DK0bAH9EPsUz1D3nHmNwq16k4EPL2opBEg$>

So once you get a ConstantValueAttribute from a field, you can check its constant() accessor, and pattern match to check if it is an IntegerEntry/StringEntry etc.



Regards,

Chen Liang

________________________________

From: Mark Roberts <markro at cs.washington.edu<mailto:markro at cs.washington.edu>>
Sent: Monday, November 25, 2024 4:17 PM
To: Chen Liang <chen.l.liang at oracle.com<mailto:chen.l.liang at oracle.com>>; classfile-api-dev at openjdk.org<mailto:classfile-api-dev at openjdk.org> <classfile-api-dev at openjdk.org<mailto:classfile-api-dev at openjdk.org>>
Subject: [External] : how does one get value of ConstantValueAttribute?



ConstantValueAttribute:const() is not public.  The documentation implies it is.  How do you get the value?



Thanks,

Mark


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