Sorry, wrong class... XmlElementRef, not XmlElement:
/home/sebersole/projects/hibernate/hibernate-orm/hibernate-core/target/generated-src/jaxb/main/org/hibernate/boot/jaxb/hbm/spi/JaxbHbmFilterType.java:57:
error: cannot find symbol
@XmlElementRef(name = "aliases", namespace = "
http://www.hibernate.org/xsd/orm/hbm", type = JAXBElement.class, required =
false)
^
symbol: method required()
location: @interface XmlElementRef
If we decide to stick with support for Java 6, I will try to incorporate
this -target option. Thanks!
On Wed, Apr 1, 2015 at 1:55 AM, Gunnar Morling <gunnar(a)hibernate.org> wrote:
Hi,
Can you share the exact exception/error you get when using the generated
model with Java 6? The required() attribute already exists as of Java 6 [1].
You should be able to make the generated code Java 6 compatible by either
setting the right options for XJC (the JAXB code generator) or in the worst
case by falling back to an older version of XJC. I had a quick look, this
setting looks promising:
-target (2.0|2.1): Avoid generating code that relies on any JAXB
2.1|2.2 features. This will allow the generated code to run with JAXB 2.0
runtime (such as JavaSE 6.)
That being said, I think it'd be fine to require Java 7 for ORM 5. OGM,
Search and also many other libraries have done that move by now.
--Gunnar
[1]
http://docs.oracle.com/javase/6/docs/api/javax/xml/bind/annotation/XmlEle...
2015-04-01 2:04 GMT+02:00 Steve Ebersole <steve(a)hibernate.org>:
> 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?
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