RFR: 8224243: Make AccessibleObject a sealed class [v2]

[Kasper Nielsen]

On Fri, 21 May 2021 02:42:50 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> Conceptually, AccessbileObject is a sealed class with a protected constructor stating
>> 
>>     Constructor: only used by the Java Virtual Machine.
>> 
>> With the language now supporting sealed classes, the AccessbileObject should be marked as sealed.
>> 
>> Executable and Field are the subclasses of AccessbileObject in the JDK; as Executable has subclasses, it is marked as non-sealed.
>> 
>> Please also review the corresponding CSR:
>> 
>> https://bugs.openjdk.java.net/browse/JDK-8224243
>
> Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update in response to review feedback.

Missed the part about only Executable being made sealed. But if Executable is sealed, setAccessible(boolean) could still be moved from Method/Constructor down to Executable.

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PR: https://git.openjdk.java.net/jdk/pull/4133