Xatkit cannot be built with JDK9, 10, and 12

[gdaniel]

These JDKs introduce Modules, that are defined in java.lang.module, and conflict with Xatkit Modules.
In addition, the build prints several warning related to illegal reflective accesses from xcore and xtext.

[gdaniel]

Support for JDK9 and JDK10 is left for a future release (current release: v1.0.0).

[gdaniel]

This support implies to rename module packages and classes, and handle illegal reflective calls

[gdaniel]

This needs to be check after the renaming of Module-related classes to Platform (see xatkit-bot-platform/xatkit-runtime#172)

[gdaniel]

This issue has been reported by @nadiana18 after the Xatkit tutorial, relevant part of the log provided below.
Java version: 12
OS: macos

[INFO] --- xtext-maven-plugin:2.9.2:generate (default) @ common ---
[INFO] Encoding: UTF-8
[INFO] Compiler source level: 1.8
[INFO] Compiler target level: 1.8
[INFO] Using common types.
[INFO] Collecting source models.
[INFO] Installing type provider.
[INFO] Generating stubs into [...]
[INFO] Compiling stubs located in [...]
[INFO] Installing type provider for stubs.
[INFO] Validate and generate.
[ERROR] resource is empty: java:/Objects/java.lang.Object
java.lang.IllegalStateException
at org.eclipse.xtext.common.types.access.impl.AbstractClassMirror.getEObject (AbstractClassMirror.java:93)
at org.eclipse.xtext.common.types.access.TypeResource.getEObject (TypeResource.java:90)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject (ResourceSetImpl.java:223)
at org.eclipse.emf.ecore.util.EcoreUtil.resolve (EcoreUtil.java:213)
at org.eclipse.emf.ecore.util.EcoreUtil.resolve (EcoreUtil.java:269)
at org.eclipse.xtext.common.types.access.TypeResource.resolveJavaObjectURIProxy (TypeResource.java:169)
at org.eclipse.xtext.common.types.impl.JvmTypeReferenceImplCustom.eResolveProxy (JvmTypeReferenceImplCustom.java:32)
at org.eclipse.xtext.common.types.impl.JvmParameterizedTypeReferenceImpl.getType (JvmParameterizedTypeReferenceImpl.java:111

This issue seems to be related. The discussion mention Java 10 support from Tycho, there is maybe a plugin dependency to upgrade.

[gdaniel]

Also related to xatkit-bot-platform/xatkit-runtime#250