getSlotsForFace when using Capabilities?

[deerangle]

The old ISidedInventory interface supports the getSlotsForFace method, but as of newer forge versions one should use Capabilites. How would I implement this using Capabilities? I know that I can control if I want to return a Capability using the EnumFacing attribute of the getCapability function, but how can I make each side of the block correspond to certain slots just like SidedInventory does?

[desht]

Generally, you'd do this by having different item handlers depending on the face, and return the appropriate one from getCapability().

 

As an example, a simple processing tile entity with one input and one output slot would have two item handlers (most likely a subclass of ItemStackHandler with isItemValid() overridden if necessary to filter what's allowed in there).

Edited January 25, 2019 by desht