CLE is able to generate the Java source files starting from such specification files.
Starting with version 0.1.8, CLE supports only the version 3.4 of Eclipse. Previous versions of Eclipse might work but they haven't been tested.
CLE runs on JavaSE-5.0.
You can also download the ZIP archive from SourceForce download area and extract it directly into the home of your Eclipse installation (or if you preferred, into the dropins directory).