>From you explanation it looks like clear inheritance. Make BaseType and than inherit all Types from it. Implementation should be placed only to BaseType.
Pavel On Mon, Jul 27, 2009 at 10:35 AM, Sascha Broich - TSA<sascha.bro...@tsa.de> wrote: > Von: Patrik Nordwall [mailto:patrik.nordw...@gmail.com] >> I can probably help you more with the customization if you like, but >> then I need more information and an example to be able to understand >> exactly what you would like to do. > > Okay, I will try to explain my problem more detailed. > > I have several entity classes that have different semantics but same syntax. > They are called Type because - they typify other objects. > Therefore they consist of a short key string and a description. > Such a type could be currency with the ISO 3 letter key and the currency's > name or the ISO language code and the language's name. > > For accessing from outside they all have the same pattern: > - Get all elements of a type. > - Get one element by its key. > - Add an element. > - Change an element. > - Remove an element. > > (Hm, sounds like scaffold...) > > Now I have a dozen of this types. > Creating one service function for each type and each access mode is not very > object oriented. > Also I would get a service with about 60 almost identical functions. > So with generics it shrinks to one function for each access mode. > > <T extends Type> T add(T t); > <T extends Type> T save(T t); > <T extends Type> T remove(T t); > <T extends Type> Collection<T> findAll(Class<T> clazz); > <T extends Type> T findByKey(Class<T> clazz, String key); > > But the model language does not allow such generics. > Which makes it hard to write such a service. > > I hope, this could clearify my intentions. > > > Regards, > Sascha Broich > -- > TSA - Teleport Sachsen-Anhalt Service GmbH > Delitzscher Straße 70, 06112 Halle > Phone: +49 39203 8 2524 > Email: sascha.bro...@tsa.de > > Firmensitz: Steinfeldstraße 5, D-39179 Barleben > Geschäftsführer: Marco Langhof > Amtsgericht: Stendal HRB 6388 > http://www.tsa.de > ------------------------------------------------------------------------------ > _______________________________________________ > Fornax-developer mailing list > Fornax-developer@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/fornax-developer > ------------------------------------------------------------------------------ _______________________________________________ Fornax-developer mailing list Fornax-developer@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/fornax-developer
