2 dimensional Arrays or the best approach on this?

Setup, Configuration and Use Scripts & Rules
2

Just in case you haven’t seen these:

But both of these just use if else statements to represent the state machine.

I can think of a couple of ways to solve this.

Approach 1: MAP transform

Put the data structure into a .map file with the current state + the input as the key and the new state as the value.

running-pausepressed = paused
paused-pausedpressed = running
...

Then in the code you would have:

    val newState = transform("MAP", "fsm.map", StateItem.state.toString + "-" + InputItem.state.toString)

Personally I think this is the easiest to work with approach.

Approach 2: Map

This approach builds the same thing using a Map instead of the .map file.

import java.util.Map

val fsm = createHashMap( "running-pausepressed" -> "paused",
                         "paused-pausedpressed" -> "running", ...
                        )

...

    val newState = fsm.get(StateItem.state.toString + "-" + InputItem.state.toString)

The key to both of these approaches is realizing that you don’t need a 2D array to represent this data. If you treat the two-dimensional address just as a key then you can just use a Map.