[1.14.4] how to use ItemHandler capability to insert item in slot?

[OsHeaven]

Im exploring the 1.14.4 way of handle items with tileentities and containers. im able to build some chests for holding items etc., but i cant figure out how to generate items like a furnace in a result Slot.

i tried to use the insertItem method from the IItemHandler in the tick() method, but it takes no effect

handler.ifPresent(h -> h.insertItem(4, new ItemStack(Items.IRON_INGOT), false));

or

getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY).map(h -> h.insertItem(4, new ItemStack(Items.IRON_INGOT), false));

 

 

whats the correct way?

 

thx for any hints

[OsHeaven]

ah ok thx.

 

i figured out, it needs a true condition in the isItemValid() method from IItemHandler for the result slot as well as for the Input Slots.

 

now its working… 

 

(Im porting my stuff from 1.13.2 where i used the ISidedInventory implementation, but the ItemHandler stuff seems to be more comfortable)