On Tue, May 12, 2009 at 7:29 AM, Stephen Colebourne <scolebou...@btopenworld.com> wrote: > The 'functors' in [collections] and [functor] are very different: > http://commons.apache.org/collections/api-release/org/apache/commons/collections/package-summary.html > http://commons.apache.org/sandbox/functor/apidocs/org/apache/commons/functor/package-summary.html > There is no need to share these interfaces, add dependencies or anything > similar. (Equally, were they the same John's argument would be sound.)
I would argue that they're not inherently different, though. A Predicate in collections-speak is the same thing as a UnaryPredicate in functor-speak. They are interfaces that have one method taking an object (of a particular type in the "new" stuff) and returns true/false. Likewise, a Closure is a UnaryProcedure and a Transformer is a UnaryFunction. There really should be no need to come up with a new concept here, IMHO. What's wrong with having a very simple API jar from functor (which includes the no-arg, unary, and binary versions of the three interfaces)? These interfaces haven't changed (nor can they by definition) for a long time aside from us now adding generics to the mix, but that's a non-issue since we're talking about making these changes in the generified collections library. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
