What about using an extent and having both types extend it. It would pick the right class based on whichever table has an item with that primary key.
Daniel. > -----Original Message----- > From: news [mailto:[EMAIL PROTECTED] Behalf Of Sebastian > Sent: 02 June 2004 17:07 > To: [EMAIL PROTECTED] > Subject: Re: Mapping question > > > To simplify my question: > > I have a table containing a foreign key column and the foreign key of a > row points to different tables based on the first three letters of the > foreign key. E.g. when it starts with "art" then it points to a record > in the article table. When it starts with "cat" then it points to a > category table. > > This means OJB should based on the first three letters of the foreign > key know what kind of object to reference. > > What kind of custom mapper or converter or whatever do I have to write. > > Thanks, > Sebastian > > > Sebastian wrote: > > Hi, > > I'm trying to map some tables with OJBs but don't know how to express > > their relation. Maybe someone can give me a hint. > > > > I have three tables: > > articles with OID as primary key > > categories with OID as primary key > > custom_fields with OID as primary key, OID_FK as foreign key > > > > OID is generated uniquely over all tables in a format: "first 3 letters > > of the table name" plus a "incrementing value". E.g. > > cat01,art02,art03,cus04. > > > > An article as well as a category can have a custom field that is stored > > in the custom_fields table, the OID_FK is the OID of the > related article > > or category. The first three letters of OID indicate the "object type" > > article or category. > > > > How do I have to configure the repository.xml so that always the right > > object (a category or an article) is referenced by an > customField object? > > > > Thanks in advance, > > Sebastian > > > --------------------------------------------------------------------- > 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]
