New candidate JEP: 371: Hidden Classes

[Michael Paus]

Am 26.01.20 um 13:00 schrieb core-libs-dev-request at openjdk.java.net:
> Message: 1
> Date: Sat, 25 Jan 2020 09:07:23 -0800
> From: Mandy Chung <mandy.chung at oracle.com>
> To: Bernd Eckenfels <ecki at zusammenkunft.net>
> Cc: core-libs-dev Libs <core-libs-dev at openjdk.java.net>
> Subject: Re: New candidate JEP: 371: Hidden Classes
> Message-ID: <f7459caf-7e11-06cb-ff27-40c72c1d1624 at oracle.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
>
>
> On 1/24/20 9:15 PM, Bernd Eckenfels wrote:
>> Hello,
>>
>> I wonder will this (weak class) be useful for reflective method
>> accessors and even be able to reduce/remove the need of
>> jdk.internal.reflect.DelegatingClassLoaders? If so, that would be a good
>> example to mention in the JEP (it only mentions Proxies).
> The other alternative is to change core reflection to use MethodHandle
> where Peter Levart has a prototype:
>      https://bugs.openjdk.java.net/browse/JDK-6824466
>
> This would help the reflective support for inline classes and
> new VM/language feature such that adding support in MethodHandle
> will work both both.

In that case watch out for GraalVM. Native-image does not fully support 
MethodHandles.

See: 
https://github.com/oracle/graal/blob/master/substratevm/LIMITATIONS.md#invokedynamic-bytecode-and-method-handles