[NETBEANS-3234] Apache NetBeans running on JDK 11 cannot access package classes

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 11.1
• Fix Version/s: 11.3
• Labels: pull-request-available
• Assignee: Jason Clarke
• Reporter: Boris Heithecker
• Created: 12/Oct/19 09:39
• Updated: 03/Nov/20 15:44
• Resolved: 11/Feb/20 09:44

Description

If a package-info element is defined in some package, it cannot be properly accessed at runtime:  
 
java.lang.Package p = AnyClass.class.getPackage();
 
should return a package object representing the actual package-info element of that package. It is, for example, used by the JAXB runtime to read XmlSchema annotations at package level. 
 
This has been tested in oracle jdk11.0.4. Class java.lang.Package in Java 11 has a private field called "packageInfo" of type "Class<?>", which should hold a reference to the actual package-info class object, i.e. AnyPackage.package-info. In NetBeans, always wrongly references "java.lang.Package$1PackageInfoProxy", which is a fallback reference set if no actual package-info could be found. 
 
The reason is most likely that neither 
 
org.netbeans.JarClassLoader
nor org.netbeans.ProxyClassLoader
nor org.netbeans.StandardModule$OneModuleClassLoader (all in platform/o.n.bootstrap)
 
override method "java.lang.ClassLoader.findClass(String name)". The default implementation throws an exceptions which causes the above fallback reference to be set. 
 
This is a serious issue. If it is not fixed, the platform will not be fully comptabile, among others, with the JAXB RI and also JAX-WS RI. 

Issue Links

• causes: NETBEANS-3554 problematic jaxb constellation (package-info.java)
• links to: GitHub Pull Request #1565
• links to: GitHub Pull Request #1583