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https://issues.apache.org/jira/browse/JOHNZON-305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17064229#comment-17064229
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Adrian Price commented on JOHNZON-305:
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Hi [~romain.manni-bucau], thanks for your response. I've did try modifying the
build to produce JARs with Automatic-Module-Name manifest headers, but that
isn't a workable solution, as jlink won't accept automatic modules. Then I
tried adding module-info.java to johnzon-core but of course that caused
compilation errors with java-compile.version set to 1.8, but setting it to 9 or
14 and running the build on JDK14 caused maven-javadoc-plugin to fail because
some kind of API incompatibility. So it's clear that making Johnzon properly
usable with Java9+ will be no easy task, especially if one wishes to retain
binary backwards compatibility with earlier JRE versions.
> Johnzon should provide Java 9 module information
> ------------------------------------------------
>
> Key: JOHNZON-305
> URL: https://issues.apache.org/jira/browse/JOHNZON-305
> Project: Johnzon
> Issue Type: Improvement
> Components: Core, JAX-RS, JSON-B, Mapper, OSGi, Websocket
> Affects Versions: 1.2.3
> Reporter: Adrian Price
> Priority: Major
>
> Johnzon does not declare any Java 9 modules and consequently it is not usable
> with a modular Java 9+ program*. There are two possible approaches:
> # Add module-info.java files to each of johnzon-core, johnzon-jaxrs,
> johnzon-jsonb, johnzon-json-extras, johnzon-jsonschema, johnzon-mapper,
> johnzon-osgi, johnzon-websocket and possibly johnzon-maven-plugin.
> (Preferred, the 'correct way'.)
> # Configure maven-jar-plugin with an
> archive/manifestEntries/Automatic-Module-Name element. Probably best achieved
> with a plugin element in the parent /johnzon/pom.xml referencing a property
> to be defined in each sub-module (say ${johnzon.module.name}). (Quick 'n
> dirty?)
> I'm not sure, but it might even be appropriate to do both... needs research.
> *You get exceptions like this: 'Unable to make field private final
> javafx.beans.property.BooleanProperty
> io.github.demonfiddler.timer.model.MultiTimerBean.delayStart accessible:
> module io.github.demonfiddler.multitimer does not "opens
> io.github.demonfiddler.timer.model" to unnamed module @22036d57'. Also
> Eclipse problem markers like this: "Name of automatic module 'johnzon.core'
> is unstable, it is derived from the module's file name."
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