On Mon, Oct 24, 2011 at 9:52 AM, Grant Ingersoll <gsing...@apache.org> wrote: > Hi, > > I was perusing trunk code on the way back from Eurocon and noticed the new > FieldType stuff has some interfaces in it. In the past we've tried to stick > to interfaces for only simple ones (i.e. one or two methods that aren't > likely to change at all) and instead used abstract classes for bigger classes > that may be subject to change more often.
I think its good you brought this up Grant. I wanted to mention this: as far as interfaces versus abstract classes, in my opinion Lucene was under a false sense of security before thinking that abstract classes actually solve these back compat problems. In fact they can create serious problems like https://issues.apache.org/jira/browse/LUCENE-2828. In other words, if someone writes a delegator over an abstract class, its asking for trouble. On the other hand, delegators over interfaces are safe because they (and we) get a compile-time break for the new methods. -- lucidimagination.com --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
