Project targets at Java 7, but requires Java 8 deps when runs at Java 9+ #248
Description
I am working on Maven Doxia and recently upgraded xmlunit-core, the GH action tells me this:
https://github.com/apache/maven-doxia/runs/4827147809?check_suite_focus=true#step:5:1729
The project is still targeted at Java 7, so is xmlunit. We test with multiple JDK versions, as soon as Java 11 is used a Java 8 dependency is sourced. This contradicts the project's target at 7. Enforcer rejects the build. While I could upgrade to Java 8, but for the wrong reasons.
This snippet does not mention that actually Java 8 bytecode level will be required:
If you are using Java 9 or later the core also depends on the JAXB API. This used to be part of the standard class library but has been split out of it with Java 9.
If you want to use Input.fromJaxb - i.e. you want to serialize plain Java objects to XML as input - then you also need to add a dependency on the JAXB implementation. Starting with XMLUnit 2.6.4, xmlunit-core optionally depends on the JAXB reference implementation and its transitive dependencies. Starting with XMLUnit 2.8.0 the JAXB dependency requires the JakartaEE version of JAXB.
Is GlassFish JAXB from javax namespace in version 2.x not more than enough for this project?