...check section 3.5.6 - Inheritance Mapping, of the DataMapper Developer Guide [ http://www.apache.org/dist/ibatis/binaries/ibatis.net/Doc-DataMapper-1.5.1.zip ], i think there's an explanation there that covers your case :)
[]s
Anderson Fortaleza
On 10/12/06, Per Magne Bjornerud <
[EMAIL PROTECTED]> wrote:
Hello,
I have a database where several subclasses are mapped to the same table.
I'll stick to the standard example here. Assume
Base class: Person
Subclass: Employee
Subclass: Customer
In my application, I mostly use instances of Employee or Customer
objects. But in the DB, they are both stored to the Person table. In
addition to the object properties, they have a PersonType id to know
which is which.
Is there any way to set up iBatis mapping so the objects I get returned
will be instances of the different subclasses, depending on the
PersonType field?
I want to do a very simple "SELECT * FROM Person WHERE Id = X" and map
it to an object.
Obviously identical <select> elements for each subclass and an
additional lookup to know the type of each object before I select them
isn't really an option. Is there a way for iBatis to handle this?
I guess the alternative might be to create instances of Person objects
and add a GetCorrectInstance() method that will return objects of
correct subclass. If iBatis cannot help me do what I want, I'd also be
happy for some tips, patterns or keywords to help me find the best
possible workaround.
--
Per Magne Bjornerud
