hi rice, archie, we're currently in a release candidate for 1.0 and thus adding new features is not the thing to do if we do not want to get blamed by other users :(
jakob Archie wrote: > Hi, > Yes, I agree your statement. I like OJB, but > sometimes I feel OJB does not continue enhanceing its > mapping capability. Hibernate does have better mapping > capability. Since the introduction of "anonymous > field" into OJB which I quite like it, OJB does not > improve mapping capability much. Maybe too much effort > is taken on JDO implementation. But since JDO 1.0 > itself does not regulate much about OR mapping (it is > heard that in 2.0, much regulatin will be made), good > OR mapping mechanism should be borrowed from some > other good ideas like Hibernate. > > By the way, I like the embedded (nested) field > function in OJB. Hibernate has similar function called > component, but for deeper nesting its configuration is > not that easy. > > Archie > > --- Rice Yeh <[EMAIL PROTECTED]> wrote: > >>>Hi, >>> I have been using OJB for some period. I am >> >>taking >> >>>a >>>project left by a partner that uses Hinbernate for >>>persistence. So I start studying Hibernate. >>>Hibernate >>>has a mapping function called "any type mapping" >>>that >>>is defined as the follows: >>> >>>"The <any> mapping element defines a polymorphic >>>association to classes from multiple tables. This >>>type >>>of mapping always requires more than one column. >> >>The >> >>>first column holds the type of the associated >>>entity. >>>The remaining columns hold the identifier. It is >>>impossible to specify a foreign key constraint for >>>this kind of association, so this is most >> >>certainly >> >>>not meant as the usual way of mapping >> >>(polymorphic) >> >>>associations." >>> >>>This kind of mapping is quite useful when dealing >>>with >>>fields of java.lang.Object or interface. However, >> >>as >> >>>I >>>know, there is no such support in OJB. I try to >>>study >>>the source code of OJB, but am still not able to >>>figure out the way to modify it (The xml mapping >>>handling code is a little hard to understand, just >>>wonder if it is possible to re-write it with Jibx >> >>to >> >>>make it more concise). >>> >>>Regards, >>>Rice >>> >>> >>>__________________________________ >>>Do you Yahoo!? >>>Exclusive Video Premiere - Britney Spears >>>http://launch.yahoo.com/promos/britneyspears/ >>> >>> >> > --------------------------------------------------------------------- > >>>To unsubscribe, e-mail: >>>[EMAIL PROTECTED] >>>For additional commands, e-mail: >>>[EMAIL PROTECTED] >>> >> >> >>__________________________________ >>Do you Yahoo!? >>Exclusive Video Premiere - Britney Spears >>http://launch.yahoo.com/promos/britneyspears/ > > > > __________________________________ > Do you Yahoo!? > Exclusive Video Premiere - Britney Spears > http://launch.yahoo.com/promos/britneyspears/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
