Solved Undo changes in world

Alright, so. I'm making a spleef plugin but I can't seem to figure this out. I've got the world with the map, but I want to reset it (to it's pre-game state) after each game. How could this be done?

My best guess is that you should have another world with a backup of the unchanged map, and then replace the new map with the backup. Tips?

 

@timtower as in? I know world edit includes schematics of that's what you mean.

 

This is possibly not the most efficient way, but I listen to any events that could change a block (BlockBreakEvent, BlockPlaceEvent, etc) and add its BlockState before the modification to a List. When the game ends, iterate across the list and update all of the BlockStates (may want to do it in waves to avoid lag)
Hope this helps

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@TheMinecraftKnight
Hey, thanks for the reply. I'll try that since it seems relatively simple and speed isn't really an issue right now.
Thanks to both of you for your helpful replies!