That is very unfortunate. Not only does this force me to keep
separate mapping files for SQL and XML mapping, I also have to copy/
paste the common field descriptors over every table in the database.
I am pleased to hear about the upcoming release, however. Will the
syntax be similar to polymorphism in XML binding?
regards,
Henk van Voorthuijsen
Henk,
our current implementation of polymorphism only supports the tabel
per class mapping as stated by Werner. Having said that we intend
to improve that in the future to also support mapping per concrete
class (what you wanted) and mapping per class hierarchy (all goes
into one table).
It's also important for you to know that the polymorphism support
is quite new and not included in 0.9.7 release. If you like to use
that feature you will need to work with a CVS snapshoot until we
release 0.9.9 within a 2 week timeframe.
Ralf
Werner Guttmann schrieb:
Henk,
I think there's no way you can map the classes as layed out by you
to your table setup. Given that I have recently added support for
polymorphism, the only way to go about this decently is a setup
where you have three tables, one for Persistent classes, one for
Persons and one for Addresses, wich all common fields going into
Persistent.
Werner
-----Ursprüngliche Nachricht-----
Von: Henk van Voorthuijsen [mailto:[EMAIL PROTECTED]
Gesendet: Montag, 08. August 2005 15:45
An: [email protected]
Betreff: [castor-user] [JDO] How to handle subclassing to common
fields?
Given the following set of classes (assume the appropriate getter/
setter methods):
abstract class Persistent
{
String _entryName;
Date _entryDate
}
class Person extends Persistent
{
String personId
String _firstName;
String _lastName;
}
class Address extends Persistent
{
String addressId
String _city;
String _street;
}
and the following tables:
Person
{
personid
entryname
entrydate
firstname
lastname
}
Address
{
addrid
entryname
entrydate
city
street
}
How do I set up a mapping without having to specify the common
fields for both classes?
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