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Re: [cross-project-issues-dev] Eclipse Platform bundles usage of new language constructs and your plugins


On Thu, Oct 17, 2019 at 5:04 PM Ed Willink <ed@xxxxxxxxxxxxx> wrote:

Hi

"move your bundle to newer BREE (highest BREE of deps)"

Seems like a good candidate for a MANIFEST.MF warning.

I would highly appreciate if someone provide patches for that.
 

    Regards

        Ed Willink

On 17/10/2019 14:14, Aleksandar Kurtakov wrote:
Eclipse Platform starts using more and more new Java constructs (up to Java 8 for now) like try-with-resources, foreach and etc.
Bundles have their minimal versions bumped whenever BREE has been bumped so one can have clear indicator of this change.
This new features bring dependency on new classes like AutoClosable ( Java 1.7) , Iterable (Java 1.5) and probably others.
If your bundles have BREE lower than the Platform bundle they depend on and you have JVM of that level configured in Eclipse errors like "The type java.lang.Iterable cannot be resolved. It is indirectly referenced from required .class files" could be shown.
This is source level only issue if you try to build your old bundle against latest platform. People just using their prebuilt bundles won't face anything like this.
Possible fixes for this issue are:
* move your bundle to newer BREE (highest BREE of deps)
* build against proper target platform containing the oldest versions of your deps you support

I don't believe many people will face such issues but let's get this out for the sake of having it written somewhere.

--
Alexander Kurtakov
Red Hat Eclipse Team

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--
Alexander Kurtakov
Red Hat Eclipse Team

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