RE: [Hibernate] custom identifier class

[Gavin K. <Gav...@ex...>]

Oh, so it isn't actually a composite key. I didn't understand
properly then. Well, using a UserType is exactly the right=20
approach. You would also need to implement IdentifierGenerator
to generate instances of PrimaryKey (your implementation could=20
just wrap up a built-in key generation strategy). This should
work out perfectly - if you have any more problems let me know.

The mapping would be:

<id name=3D"key" type=3D"my.pkg.PrimaryKeyType">
   <generator class=3D"my.pkg.PrimaryKeyGenerator"/>
</id>

> -----Original Message-----
> From: phr...@im... [mailto:phr...@im...]=20
> Sent: Tuesday, 10 December 2002 10:16 AM
> To: Gavin King; Chris Winters
> Cc: hib...@li...
> Subject: RE: [Hibernate] custom identifier class
>=20
>=20
> hi,
>=20
> On Tue, 10 Dec 2002 09:10:09 +1100, "Gavin King"=20
> <Gav...@ex...>
> said:
> > This has been requested once before, and it would be very
> > trivial to add support for a <generator> subelement of
> > <composite-id>. But theres always something very fishy
> > about using a generated (ie. synthetic) composite id. It
> > really makes no sense. It never even makes sense to have a
> > single <key-property> be generated....
> >=20
> > I can't imagine why you would want it....
>=20
> i'm trying to port some legacy code over to hibernate. the=20
> code relies on a PrimaryKey class for identifying objects.=20
> this is not a composite key, so automatic generation totally=20
> makes sense (it really just encapsulates a String id=20
> property). changing this all over the place would be somewhat=20
> painful, that's why i was trying to work around it within the=20
> boundaries of Hibernate.
>=20
> i would like to know what sort of direction would you recommend, eg
>  - replace the PrimaryKey class with String everywhere (-> pain)
>  - extend hibernate along the lines you mentioned (sounds=20
> good to me, but  i need further directions)
>  - can i just directly use the guts of hibernate to get a new ID?
>  - map it some other way (i tried a UserType, didn't really work out)
>=20
> thanks,
>     viktor
> --=20
>  =20
>   phr...@im...
>=20
> --=20
> http://fastmail.fm - Faster than the air-speed velocity of an
>                       unladen european swallow
>=20


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