/usr/share/java/org.eclipse.osgi.jar is in libequinox-osgi-java 3.8.1-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../../lib/eclipse/plugins/org.eclipse.osgi_3.8.1.dist.jar
/usr/share/java/../../lib/eclipse/plugins/org.eclipse.osgi_3.8.1.dist.jar