Get item stack from an integer slot

[ChromaKey81]

What's the method for getting an item stack from the slot of either an entity or tile entity? I need to input a slot as an integer and return an ItemStack.

To get it from a tile entity, I've been using 

(IInventory) replace.getSource().getWorld().getTileEntity(sourcePos).getStackInSlot(sourceSlot)

which works properly, but someone else told me that IInventory won't work for anything outside of the vanilla game and that I should instead use the "IItemHandler wrapper." Not sure exactly what that is though.

 

However, I still haven't figured out how to do this with mobs, so I could use some help with that.

 

Edit: I suppose I should specify that this is being used for a command (the above code line is in ".executes((replace) -> {})")

Edited July 1, 2020 by ChromaKey81
not solved lol

[ChromaKey81]

  On 7/1/2020 at 7:20 AM, diesieben07 said:

You first need to get the IItemHandler capability from the tile entity (getCapability with CapabilityItemHandler.ITEM_HANDLER_CAPABILITY). This will give you an IItemHandler if the TE has an inventory. You can then interact with that.

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Thank you for the explanation on that. Does this work for entities? If not, what is the method for that?

[ChromaKey81]

  On 7/1/2020 at 2:12 PM, diesieben07 said:

Entities that have an inventory (e.g. the player) also provide this capability, yes.

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So it works with players, thanks. Are entities with armor/hand slots (e.g. zombies) included? I need to be able to pass any entity with slots as a source.

Edited July 1, 2020 by ChromaKey81

[ChromaKey81]

  On 7/1/2020 at 2:21 PM, diesieben07 said:

Yes, all living entities have equipment and expose it as the IItemHandler capability.

You can even pass in a Direction to only get the hands (Direction.UP or DOWN) or the armor (all other directions). When you pass in null you get a handler that wraps the whole inventory.

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Thanks so much. I've been looking for an answer to this for a while

[ChromaKey81]

  On 7/1/2020 at 7:20 AM, diesieben07 said:

You first need to get the IItemHandler capability from the tile entity (getCapability with CapabilityItemHandler.ITEM_HANDLER_CAPABILITY). This will give you an IItemHandler if the TE has an inventory. You can then interact with that.

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Shoot, actually I'm still having a bit of trouble with that.

replace.getSource().getWorld().getTileEntity(BlockPosArgument.getLoadedBlockPos(replace, "sourcePos")).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY)

 

This returns LazyOptional<IItemHandler>. How do I get from there to using the IItemHandler methods?