[Any] [SOLVED] Get UUID

[Bektor]

Hi,

 

I'm currently wondering how to get the UUID of the player, as there are several methods which return a UUID,

like

player.getGameProfile().getId()
player.getPersistentID()
player.getUniqueID()
player.getUUID(player.getGameProfile())
player.getOfflineUUID(username)

 

As there are so many different methods, I am wondering which one I should use to store the owner of a block in the tileentity, so that only this owner can access the block.

I would also like to know the difference between all those methods and how those methods handle stuff like for example offline mod when you don't have a internet connection.

 

Thx in advance.

Bektor

Edited August 24, 2017 by Bektor

[V0idWa1k3r]

EntityPlayer.getUUID(GameProfile) returns the UUID of the profile if present, otherwise reroutes to EntityPlayer.getOfflineUUID(String).

EntityPlayer.getOfflineUUID(String) returns a UUID generated from a username provided prefixed with OfflinePlayer.

Entity::getPersistentID and Entity::getUniqueID both return the same in case of EntityPlayer - and that would be the result of EntityPlayer.getUUID(GameProfile).

GameProfile::getId returns the UUID of the profile, or null if it is not present(could not connect to Mojang's servers).

 

So there are really 2 cases:

1. The player is logged in and in that case return the UUID from Mojang's servers 
2. The player is not logged in and in that case return a UUID generated based on their name.

[Bektor]

  On 8/24/2017 at 10:59 AM, V0idWa1k3r said:

EntityPlayer.getUUID(GameProfile) returns the UUID of the profile if present, otherwise reroutes to EntityPlayer.getOfflineUUID(String).

EntityPlayer.getOfflineUUID(String) returns a UUID generated from a username provided prefixed with OfflinePlayer.

Entity::getPersistentID and Entity::getUniqueID both return the same in case of EntityPlayer - and that would be the result of EntityPlayer.getUUID(GameProfile).

GameProfile::getId returns the UUID of the profile, or null if it is not present(could not connect to Mojang's servers).

 

So there are really 2 cases:

1. The player is logged in and in that case return the UUID from Mojang's servers 
2. The player is not logged in and in that case return a UUID generated based on their name.

Expand  

So all I have to do is call either Entity::getPersistentID or Entity::getUniqueID?

Also, in case of EntityPlayer, those methods return the same, but what would be the difference if it is no player?

[V0idWa1k3r]

  On 8/24/2017 at 11:29 AM, Bektor said:

So all I have to do is call either Entity::getPersistentID or Entity::getUniqueID?

Expand  

Yes, that would be the best way as you can't get null with that method.

 

  On 8/24/2017 at 11:29 AM, Bektor said:

Also, in case of EntityPlayer, those methods return the same, but what would be the difference if it is no player?

Expand  

Depends on the entity in question. Default implementation provided by Entity returns the same in both of these methods and the default implementation is the only one used by vanilla as far as I am aware. Entity::getUniqueID is used everywhere by vanilla and Entity::getPersistentID is only used by forge. Both of those methods can be overriden, so I can't tell how different mods use/override them.