[hibernate-dev] Java 6, 7 and 8... oh my!

[Steve Ebersole]

It is just the one used in almost every example I have ever seen.  I really
have no idea why one is used versus another.

On Thu, Apr 2, 2015 at 9:08 AM, Gunnar Morling <gunnar at hibernate.org> wrote:

> Had a quick look into (1).
>
> The "target" parameter is not supported by that version of the Ant task
> currently in use. If I change the class name of the Ant task from
> "org.jvnet.jaxb2_commons.xjc.XJC2Task" into "com.sun.tools.xjc.XJC2Task",
> the "target" parameter is recognized and setting it to "2.0" causes no
> required() attribute to be generated for @XmlElementRef.
>
> Do you remember why that task from JAXB Commons is used rather than the
> original XJC one?
>
> 2015-04-02 15:19 GMT+02:00 Steve Ebersole <steve at hibernate.org>:
>
>> After considering this some more, I think moving to Java 8 as baseline is
>> just not reasonable yet.  And tbh I just do not see a compelling reason to
>> move to Java 7 as the baseline.  So if reasonably possible I would still
>> like to remain backwards compatible with Java 6.
>>
>> The only hurdle I believe is this JAXB point.  I see 2 options...
>>
>> 1) Make certain our code is compatible with JAXB 2.0.  I am not well
>> versed
>> enough in JAXB features between its versions yet to know how good of an
>> idea this is.
>>
>> 2) make our codr compatible with the newer JAXB version.  This works as-is
>> in Java 7 and 8 runtimes.  For use in Java 6 runtimes, users would need to
>> update the JAXB used in their JDK/JRE.  Doing so is a well defined process
>> using endorsed libs.  See
>> http://docs.oracle.com/javase/6/docs/technotes/guides/standards/index.html
>>
>> I think option (1) is the way to go, but do not have a lot of experience
>> here.  What do y'all think?
>> On Apr 1, 2015 6:34 AM, "Steve Ebersole" <steve at hibernate.org> wrote:
>>
>> > Baseline on Java 8?  Hmm... Well thanks for tempting me :)
>> >
>> > What do you mean by "be able to experiment with significant API
>> > improvements"?
>> >
>> > On Tue, Mar 31, 2015 at 7:18 PM, Sanne Grinovero <sanne at hibernate.org>
>> > wrote:
>> >
>> >> I wouldn't disagree on requiring Java 7.
>> >> I probably wouldn't disagree with Java 8 either, after all we're not
>> >> removing older versions of Hibernate from any download location and
>> >> we'll still support and maintain some older versions. It would
>> >> actually be nice to have the latest ORM version to be able to
>> >> experiment with significant API improvements.
>> >>
>> >> FYI Hibernate Search is requiring Java 7 already, and our CI servers
>> >> are already testing our projects with JDK9 as well.
>> >>
>> >> That said, Java 6 is still being supported by some vendors. Not by
>> >> Oracle, but Red Hat and SAP will support it for much longer.
>> >>
>> >> -- Sanne
>> >>
>> >> On 1 April 2015 at 01:04, Steve Ebersole <steve at hibernate.org> wrote:
>> >> > So we now have to deal with a multi-jdk build in Hibernate ORM.  We
>> need
>> >> > Java 8 in order to compile the new hibernate-java8 module.
>> >> >
>> >> > I wanted to remain compatible with Java 6 for the rest.  However, I
>> ran
>> >> > into a snag there because of JAXB which we now use (in conjunction
>> with
>> >> > StAX) to process XML in ORM.  ANyway, the JAX generation creates a
>> model
>> >> > that is only compatible with Java 7.  I have not yet had time to
>> >> > investigate this deeply.  But it has to do with a change in the
>> >> definition
>> >> > of javax.xml.bind.annotation.XmlElement and a change in its
>> definition
>> >> > between 1.6 and 1.7 to add a new
>> >> > attribute javax.xml.bind.annotation.XmlElement#required.
>> >> >
>> >> > If anyone is familiar with this situation, I'd love to hear some
>> options
>> >> > before I spend a lot of time investigating it.
>> >> >
>> >> > The other option is that we say we are going to drop Java 6 support
>> >> since
>> >> > it has been unsupported now for, what, 3 years?
>> >> > _______________________________________________
>> >> > hibernate-dev mailing list
>> >> > hibernate-dev at lists.jboss.org
>> >> > https://lists.jboss.org/mailman/listinfo/hibernate-dev
>> >>
>> >
>> >
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>
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