|The next step in creating our coffee
maker simulator is the selection of a system metaphor. What we need is something
that everyone can understand easily. From what we know about our simulator from our CRC card
session we could consider a finite state automata, but this isn't exactly the case. We could think of it as
an adapter sitting in between the PIA and the GUI. But this seems too abstract to me. We could think of it in terms
of an alarm clock, but this isn't right either.
||No, I think that the best metaphor
for us is what Kent Beck calls the naive metaphor. This is the metaphor that
uses the domain itself. We can use it here because our domain is actually very simple and generically understood
Let's start out writing code for
the PIA. We need to see how well our design holds up under contact with actual code!