How do I save data on an ItemStack in ver 1.10.2?

Hello, I would like to know how I can save data on an ItemStack in Minecraft version 1.10.2?
I need the data to be invisible to the player and I need it to be saved in between shutdowns and such just like NBT Tags.
Unfortunately I've tried NBT Tags and several NBT plugins and for some reasons, I never get an error but nothing is ever saved (or at-least never retrieved). Could somebody help me please?

I would even be fine with a complex solution such as finding some sort of identifier for the item and saving it in a database.

 

I searched the hole internet for a solution .. nothing found ... I just had a (medium-genius) idea

I am sitting at my IPad so I have no check if this code is correct

Code:

ItemStack markedItemStack = new ItemStack(MATERIAL.Stone_Sword);
markedItemStack.setDurability((byte)1);
ItemMeta markedItemStackMeta = markedItemStack.getItemMeta();
markedItemStackMeta.setUnbreakable(true);
markedItemStack.setItemStack(markedItemStackMeta);

//Its impossible to loose durability on a stone sword with unbreakable tag

PlayerVariable.getInventory().addItem(markedItemStack);

if(markedItemStack.getDurability == (byte)1) {
    //bla bla
}

Two problems
1. Only works with items that are breakable (weapons for example, but not blocks)
2. Item will get unbreakable

I will search for a better solution ..

 

@Benjamint22
Nbt does work. Have a look at this plugin. Source within, just open with 7-zip/winrar. Magic in BookUtil, NBTUtil and ReflectionUtil.

Tested for 1.8 but afaik it works on 1.10 too.

 

And in which nbt tag you will place the data then?? Added nbt-tags get auto-deleted from bukkit at the start of the server. I found out 4 options:

1. Use ProtocolLib to intercept a PacketPlayIn something .. very complicated!
2. In the onDisable Method you create a loop, that loops trough all players that were on the server, look if they has the item, on which slot it is and the players name .. and then you check it where you need it
3. You can add into the onDestroy nbt-tag a specified block so you can check the item trough it
4. save it trough the negative durability

 

@InstanceofDeath
The "auto-delete" was a bug a long time ago. It is fixed for me (1.8.8) and afaik also for higher versions.
Else no command block contraption would work these days with bukkit.

And this plugin I linked works through restarts. So no, they should not get auto-deleted. What version are you running?

 

1.8.1 mistake found

 

@InstanceofDeath
Let's hope it is really this

I just read the fact it was a bug in some thread some time ago, and it works for me. So I am quite positive it was fixed

 

Thanks!! I'll be looking at it soon and reply once I found something.

 

You can take a look at this Util class too, its extremely simple to use.

 

@Lordloss
While I agree, it is not as seemless (Granted, complaining on SUCH a high level xD). But thanks for mentioning it!