Checking if all shulkerbox items are the same

[Lumby]

Hi, in one of my slots I want to check if all the items in a shulker box are the same before allowing it to be placed in the container slot. I am however running into some trouble with navigating the NBTTagCompound. From my understanding, the items are listed in the NBTBase BlockEntityTag of the tag compound, but I don't understand how to get the "Items" tag list out of the BlockEntityTag. I tried converting it to a string, but it would take a lot of difficult parsing to go through the whole string to see if all the items are the same. Is there any way to iterate through every item within the NBTTagCompound or is my current solution with parsing strings the best there is? Thanks in advance!

 

Working in version 1.12.2

 

Below is what I have so far in case it may help:

 

	public boolean isItemValid(ItemStack stack) {
		if(stack.getItem() == Item.getItemFromBlock(Blocks.PURPLE_SHULKER_BOX)) {
			NBTTagCompound tags = stack.getTagCompound();
			if(tags.hasKey("BlockEntityTag", 10)){
				NBTBase blockEntityTag = tags.getTag("BlockEntityTag");
				String tagString = blockEntityTag.toString();
			}

			return true;
		}

		return false;
	}

 

Edited June 13, 2019 by Lumby
listed version

[Cadiboo]

Look at how the shulker box deserialises it’s nbt into an inventory. Then do that. Don’t go over the NBT tags.