On Mar 9, 2011, at 2:05 PM, dev.tom.menzel wrote: > hi, > > does my explaination satisfy u and u deem this ok? > and if yes: what is the next step? > shall I provide a patch? open an issue? >
Hello, Tom. We Commons developers are taking the stance that general-purpose exceptions don't have a place as first-class citizens. The only exceptions that will be added to Commons components are exceptions that are necessary to a given component's provided API(s). Thanks for your interest, Matt > -----Original Message----- > From: thomas menzel [mailto:dev.tom.men...@gmx.net] > Sent: Montag, 14. Februar 2011 19:16 > To: Commons Developers List > Subject: Re: [lang] propse new ObjectExistsException extends > IllegalArgumentException > > sure, > > anywhere where u want to store objects and where u might not want to allow > the addition of "same" objects such as in registries, caches, collections. > > often they are underpinned with internal sets or maps and at times it is > better to signal the client the hard way (ie. via a proper exception) that > the object he intended to add already exists. > > the reason i want to have a distinct exception here, is to allow the client > to catch this case as opposed to the case where he might want to add an > object who doest meet some constraints and where i then throw a "normal" > Illegal Argument Exception. > > Also, there is sometimes the case that i will not add the object/key itself > but rather a base form that is then first converted into the real key/object. > > such an exception would allow to return the derived key/object in a distinct > way. > e.g > > 1. > Regsitry.put(String url, Object){ > put(new Url(url, Object)) > }; > > 2. > Regsitry.put(Url url, Object); > > > the implementation could throw a new ObjectExistException<Url>(url) in the > 2nd method and the client could get the id from T getObjectKey() and do some > fall back work noit having had the need to ever convert the string url > himself into an Url Object. > > > hope that helps > > > -------- Original-Nachricht -------- >> Datum: Fri, 11 Feb 2011 15:01:32 +0100 >> Von: Simone Tripodi <simonetrip...@apache.org> >> An: Commons Developers List <dev@commons.apache.org> >> Betreff: Re: [lang] propse new ObjectExistsException extends >> IllegalArgumentException > >> Hi Thomas, >> can you describe please in which non-JPA context the exception can >> become useful? >> Many thanks in advance, have a nice day, >> Simo >> >> http://people.apache.org/~simonetripodi/ >> http://www.99soft.org/ >> >> >> >> On Fri, Feb 11, 2011 at 10:31 AM, thomas menzel <dev.tom.men...@gmx.net> >> wrote: >>> hi, >>> >>> i suggest a new exception under the commons.lang.exception namely >>> >>> ObjectExistsException extends IllegalArgumentException. >>> >>> in the jpa world there is already one like this, bit i think it has >> merit for also other cases outside of jpa and hence i would like to see it >> defined in apache's commons.lang.exception. >>> >>> what do u think? >>> >>> -- >>> NEU: FreePhone - kostenlos mobil telefonieren und surfen! >>> Jetzt informieren: http://www.gmx.net/de/go/freephone >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >>> For additional commands, e-mail: dev-h...@commons.apache.org >>> >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >> For additional commands, e-mail: dev-h...@commons.apache.org >> > > -- > Schon gehört? GMX hat einen genialen Phishing-Filter in die > Toolbar eingebaut! http://www.gmx.net/de/go/toolbar > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
