I searched for it some time ago and didn't find anything so I started
thinking about the basic design of a wizard that supports multiple paths,
optional steps and eventually loops (e.g. "Do you want to create another
Item?" -> Yes -> Jump back to step x in branch y).
>From an API point of view I would like to have something declarative so I
can see the wizard structure and all the decisions for each branch at one
place and not scattered around in all wizard steps, e.g.
void initFlow() {
startWith(page1)
.then(page2)
.thenOptional(<predicate>, page3)
.then(
newBranch(<predicate>, page4A, page5A),
newBranch(<predicate>, page4B, page5B, page6B)
)
.then(finalPage)
}
But its not fully thought out yet (some cases only work by duplicating some
declarative code but these cases are relatively rare I would guess) and
does not contain loops (may be possible by "tagging" a page with an id and
then being able to jump to id's based on predicates). The <predicate> stuff
will be nice with Java 8 when you can use lambda's which could result in
something like:
startWith(personPage)
.thenOptional(page1::isAskForDetailsSelected, detailsPage);
-- J.
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