schemagen creates an invalid xsd on JDK11

[andrehertwig]

Hi
I don't know if this is a JDK related thing, but:
When i do a mvn clean verify with JDK 8 the resulting XSD has a correct syntax with prefix and defined namespace
Maven 3.6.0 / Oracle JDK 1.8.0_192

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0"> ... </xs:schema>

but if i switch to JDK 11 the prefix (on elements) is gone but namespace declaration is still prefixed
Maven 3.6.0 / Open JDK 11.0.2

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<schema xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0"> ... </schema>

See attached test project: xsdschemagen.zip

[lennartj]

This is fixed by the classworlds patch, and handled by the latest commit to master.
See #138 .