[lworld] RFR: JDK-8251986: [lworld] implement Class::valueType and Class::referenceType in Java [v5]

[Roger Riggs]

On Thu, 20 Aug 2020 19:44:59 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> Now that javac generates the reference projection class as a sealed type,
>> this patch reimplements  `Class::valueType` and `Class::referenceType` in Java.
>> VM no longer has any knowledge of the value projection type and reference projection type.
>> 
>> This patch includes a temporary workaround to disable the preview feature check
>> for sealed types because inline types are not (yet) a preview feature in valhalla repo.
>> This workaround should be removed when it's time to make inline class a preview feature.
>
> Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   improve getProjectionTypes per Roger's suggestion

Marked as reviewed by rriggs (Committer).

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PR: https://git.openjdk.java.net/valhalla/pull/152