> On Mar 8, 2018, at 4:08 PM, Gilles <gil...@harfang.homelinux.org> wrote:
> 
> On Thu, 8 Mar 2018 15:09:18 -0700, Ralph Goers wrote:
>>> On Mar 8, 2018, at 11:06 AM, Gilles <gil...@harfang.homelinux.org> wrote:
>>> 
>>> On Thu, 8 Mar 2018 11:01:08 -0700, Gary Gregory wrote:
>>>> On Thu, Mar 8, 2018 at 10:58 AM, Gilles <gil...@harfang.homelinux.org>
>>>> wrote:
>>>> 
>>>>> On Thu, 8 Mar 2018 10:48:28 -0700, Gary Gregory wrote:
>>>>> 
>>>>>> On Thu, Mar 8, 2018 at 10:29 AM, Gilles <gil...@harfang.homelinux.org>
>>>>>> wrote:
>>>>>> 
>>>>>> On Thu, 8 Mar 2018 10:09:22 -0700, Gary Gregory wrote:
>>>>>>> 
>>>>>>> On Thu, Mar 8, 2018 at 10:01 AM, ajs6f <aj...@apache.org> wrote:
>>>>>>>> 
>>>>>>>> > On Mar 8, 2018, at 8:33 AM, Gilles <gil...@harfang.homelinux.org>
>>>>>>> 
>>>>>>>> given component and see if we want to only depend on java.base or 
>>>>>>>> create
>>>>>>>> Maven modules to compartmentalize dependencies.
>>>>>>>> 
>>>>>>>> 
>>>>>>> Then these modules can define "module-info" files, and an actual
>>>>>>> build will prove that the dependencies are as expected.
>>>>>>> 
>>>>>>> 
>>>>>> As Ralph as pointed out, you cannot generate a module-info file without
>>>>>> also using an MR Jar unless you also want to make Java 9 your base line.
>>>>>> 
>>>>> 
>>>>> Did you see, a few lines above: "[...] assuming JDK 9+ [...]"? ;-)
>>>>> 
>>>>> Related note: Java 9 is the target for compiling
>>>>> "commons-rng-examples" (maven module)
>>>>> in "Commons RNG" because one of the examples is composed of
>>>>> JPMS modules (with "module-info" files) that depend on the
>>>>> "official" artefacts (targeting Java 6) that declare an
>>>>> "automatic module name" in the manifest.
>>>>> 
>>>> 
>>>> Right now
>>>> https://git-wip-us.apache.org/repos/asf?p=commons-rdf.git;a=blob;f=pom.xml;h=06cc58c19b79af5cdf2f3d29d9a743c8adb2b548;hb=HEAD
>>>> shows Java 8 as the target.
>>>> 
>>>> Are you taking about changing that to Java 9?
>>>> 
>>>> I'll that choice to the Common RDF community but it seems that this would
>>>> exclude a lot of users.
>>> 
>>> As for "Commons RNG", the purpose may just be to prove (by
>>> usage) that the maven modules are also JPMS modules.
>> 
>> 
>> I am so confused. I am not sure what the goal is.  Let me put it this
>> way. Log4j 2 2.x supports Java 7+. We added support for Java 9 by
>> introducing a multi-release jar.  Android developers can not use any
>> version of Log4j since we did that. What I am saying is that if you
>> turn any jar into a multi-release jar it will no longer be usable in
>> Android and there is no way around it until Android Studio is fixed.
>> The problem is that the android tool inspects every class file in the
>> jar even if it is located under META-INF and it dies if it sees a Java
>> 9 class.
>> 
>> Ralph
> 
> I've asked on this list about leveraging the new features of
> JDK 9 in the upcoming release of [RNG].  When it came to
> multi-release JAR, I trusted Gary's expedite answer ("Don't
> do it") based, as yours, on experience.  So, no issue.
> 
> Yet I also wanted to ensure that the maven modules were
> JPMS-compliant: Would the declared "Automatic-Module-Name"
> behave as expected on JDK 9?
> No answer for that one.  So I resorted to create a "dummy"
> application (see "commons-rng-examples/examples-jpms").
> I guess the same could be done for [RDF] unless there is a
> smarter way. ;-)

We have not run into any problems with adding the Automatic-Module-Name header 
to the manifest.

Ralph



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