Save data on EntityBlock(Specifically Level/World)

[1Mangomaster1]

I want to save some data on the EntityBlock using saveAdditional() and then load using load().
No problem saving basic stuff obv..
but what if I want to save a BlockPos(prob save x,y and z Ig) but what about a Level?
How can I properly save a world? Ik you obviously wouldn't save the world but rather some ID you can retreive it with later, but I just can't seem to find some unique variable for each Level ot have...

People would say DimensionType but it is absolutely possible to have servers with multiple Overworlds and etc, so idk how good this will hold in that case if at all...

My question is: is there some sort of a unique ID for a world I can save and later use to retreive it?

Why I need it?
I want to save a location but it doesn't only matter to me where it was(BlockPos), but rather in what world too, if I only save the BlockPos I cannot know what Level it came from if I can't save the Level or some unique representation of it...

[X-Lomir]

For a BlockPos you can use NbtUtils#readBlockPos and NbtUtils#writeBlockPos. There's also BlockEntity#getPosFromTag and BlockEntity has a BlockPos field with getter and setter.

For the world I'm not sure either with tags, however BlockEntity has a protected Level field with setter and getter, maybe it can be of use (?).

[1Mangomaster1]

I meant I am saving a BlockPos that is NOT the BlockEntity's own pos(also even without NBTUtils it's quite easy to save the pos, but it's handy to know it exists)

same goes for the Level of the BlockEntity, I save something else, not this one

I have a block that is meant to "target" another block, for that I use a BlockPos and a Level(in case it is in another world)
so I need to be able to save and load that target

Edited May 2, 2022 by 1Mangomaster1

[1Mangomaster1]

What if there are two Overworlds? Like pointed earlier

 

[1Mangomaster1]

There's a plugin Ik that let's you add new worlds of different types. When I check the files later I see two folders that represent overworld levels(they are named differently obviously but it is the same dimension...)

EDIT:
wait I didn't see you said dimension key, alright, Imma check that out, thank you!

AND, ok. Assuming I use that to save, how do I use that key to get that world back???
Do I store the registery path? name?? or the entire key somehow tho Idek how you'd do that

Edited May 2, 2022 by 1Mangomaster1

[1Mangomaster1]

Alrighty,thank you!

 

[1Mangomaster1]

I don't know how to get the instance of MinecraftServer... ik Level has one(but looking at the code it reutns null... also at this point I have no access to a world because I am trying to use the MinecraftServer to get one), but other than that.. no idea

I saw on the Internet people saying something about FMLCommonHandler but it isn't a thing(at least not on 1.18 Forge)

Edited May 3, 2022 by 1Mangomaster1

[1Mangomaster1]

Ooh I mean I CTRL+Clicked on the Level#getServer method and saw its content...
Ik it is a .class file but for some reason I can still see the entire thing, on all files

Regardless, this is not the point, because even if Level#getServer does actually work, I do not have access to the world at this specific point.
I am talking about me trying to LOAD a world from its resource location, something you told me is possible, so if I am trying to load a world, clearly I do not have one... I am trying to find it, so I don't have an instance to call level#getServer on anyways

Edited May 3, 2022 by 1Mangomaster1

[1Mangomaster1]

I mean I see it structred like a .java file I see all the code and everything, the name just says .class after it but it is decompiled
 

[1Mangomaster1]

And yeah, I know, this is how I store it: 

	public static void saveNBT(CompoundTag nbt, Location location, String name) {
		String worldString = location.getWorld().dimension().location().toString();
		BlockPos pos = location.getPos();
		
		nbt.putString(name + ".world", worldString);
		
		nbt.putInt(name + ".pos.x", pos.getX());
		nbt.putInt(name + ".pos.y", pos.getY());
		nbt.putInt(name + ".pos.z", pos.getZ());
	}

Location is literally just a class with a Level and a BlockPos, that's all it has, nothing special
Is that a proper way to save it?

Also
I know NBTUtils has a BlockPos write and read but it RETURNS a CompoundTag and I am not sure what I need to do with that(since I already have an existing instnace of it)
I assume CompoundTag#put has someting to do with it because it can receive a tag but idrk and what I did here is not too difficault either so no biggy ig

Edited May 3, 2022 by 1Mangomaster1

[1Mangomaster1]

So... you're saying I can make another CompoundTag, and place them in it... and place that tag in the given tag? 
How do I rectreive that tag back then?

[1Mangomaster1]

is the worldString good at least? or did I get that wrong?