This artifact originates from the Orbit Project at Eclipse, it is an osgi bundle and is signed as well.
'org.eclipse.jetty.orbit:org.eclipse.jdt.core:3.7.1'
<dependency>
<groupId>org.eclipse.jetty.orbit</groupId>
<artifactId>org.eclipse.jdt.core</artifactId>
<version>3.7.1</version>
</dependency>
<dependency org="org.eclipse.jetty.orbit" name="org.eclipse.jdt.core" rev="3.7.1"/>
"org.eclipse.jetty.orbit", "org.eclipse.jdt.core", "3.7.1"