/usr/share/java/plexus-component-api.jar is in libplexus-component-api-java 1.0.0~alpha22-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/plexus/plexus-component-api/1.0-alpha-22/plexus-component-api-1.0-alpha-22.jar