RFR: 8294972: Convert jdk.jlink internal plugins to use the Classfile API [v10]

[Mandy Chung]

On Thu, 16 Mar 2023 10:47:01 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> jdk.jlink internal plugins are heavily using ASM
>> 
>> This patch converts ASM calls to Classfile API.
>> 
>> Please review.
>> Thanks,
>> Adam
>
> Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remaining cleanup in SystemModulesPlugin

Looks good.  I reviewed the changes in all plugins except IncludeLocalePlugin and will re-review it once you restore to the previous version.

src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModulesPlugin.java line 79:

> 77: import jdk.internal.classfile.ClassBuilder;
> 78: import jdk.internal.classfile.Classfile;
> 79: import jdk.internal.classfile.Opcode;

this import is unused now.

src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModulesPlugin.java line 577:

> 575:          * Generate SystemModules class
> 576:          */
> 577:         public byte[] getClassWriter(Configuration cf) {

This method no longer returns a class writer and should be renamed.   What about `genClassBytes`?

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PR: https://git.openjdk.org/jdk/pull/12944