Optical mouse for mecanum Odometry?

[AriMindell]

We are working on finding ways to calculate robot pose for a mecanum drive. Many of the papers I have found on this subject use optic flow sensors or cameras to watch changes in the ground. Could we use a Computer mouse with an optical sensor to calculate the position of our robot?

What would our limitations be using this method?

Does the roborio support Human Interface Devices plugged into the USB ports?

We are a Java team, and I wonder if we could use the JInput library on the Roborio to get the position of the mouse.

Any thoughts on this are greatly appreciated!
EDIT:
The mouse would only be used for translation. We would use a gyro to track robot turns, and transform our coordinate system to continue tracking the mouse translation.