NumberFormatException: null when using the create REST API controller

[jjlueck-tock]

Should I be able to use the REST API to create a new Simple object without specifying the ID for the new Simple object created?

Running a command like this using the current source produces a NumberFormatException when trying to convert a non-existent id field of type Long from null:

$ curl -X POST -H "Content-type: application/json" -d '{"name": "new simple object"}' http://localhost:9000/api/Simple/create

Am I just missing something?