On 12/14/06, Tore Halset <halse..vv.ntnu.no> wrote:
> On Dec 14, 2006, at 9:11 , Øyvind Harboe wrote:
>
> > Could I implement my own "NeverNullString" datatype where I'm thinking
> > that .toString() returns the either what Cayenne java.lang.String
> > returns today or e.g. "" for the case where it represents a database
> > null?
>
> Or perhaps map java.lang.CharSequence and create a NullString that
> implements it. You could then create an ExtendedType (perhaps
> subclass CharType) that does what you want.
>
> If your cayenne version if from before the fix of CAY-540 you may
> have to register the type for each possible concreate class, just as
> I did in the JTS-example.
>
> You may get into some problems with the wrong (default) ExtendedType
> get picked before your own, but it should be fixable.
OK.
Q++: Is it a good idea to use ExtendedType to represent database null
as something else than Java null pointer?
-- Øyvind Harboe http://www.zylin.com
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