Java-ebuilder

is an experimental package being developed by Gentoo Java developers. It can generate initial ebuilds from Maven  files. In its simplest form, it takes  file and several other parameters and creates an ebuild that should be checked and tested before committed. There are also add-on scripts that will generate ebuilds for any dependencies that are not packaged yet. Currently this application generates some features that are not supported by yet.

Usage
After a package source is downloaded and unpacked

Step into its directory and find the files

Refresh (create) java-ebuilder's java ebuild cache

Then let it generate the ebuild, say from the subdirectory