I need help figuring out how to set permissions for specific "classes"

So my friend and I are working on a plugin that uses different classes (in game classes, not java classes). We have several different "abilities" for each "class" but we can't figure out how to separate the classes, so that you can't have more than one class at a time. Any idea how to do this?

 

We've already done that. I guess what I want to know is how can you assign one in-game class to a player at a time, using commands to switch between classes.

 

@timtower So after looking into HashMaps, I have one more question, how do I call the HashMap (if it's in one java class) into different java classes? Thanks for your help, btw.

 

The easiest way is to give it the modifier public static (anchored in the class) and then you can just call from everywhere with ClassName[Where your HashMap is].HashMapVariable

 

Alright, thanks to you guys, we got the perms working.

 

I know thats why I said "easiest" way not best