Re: Custom key generator?

[Mike Kienenberger <mk...@gmail.com>]

On 10/26/06, Roger Parkinson <ro...@senanque.co.nz> wrote:
>  Does anyone know how to do this?
>  I know what I want to put in my key generator and I think it needs to
> implement PkGenerator (or possibly extend DbGenerator)
>  So once I've done that how to I tell Cayenne to use it for all my primary
> keys?

Once you've done that, subclass the Adapter class you're working with
and implement createPkGenerator().

As an example, for OpenBase, I did this by creating
OpenBasePkGenerator.java, then in OpenBaseAdapter.java, I created:

    protected PkGenerator createPkGenerator() {
        return new OpenBasePkGenerator();
    }

If I now wanted an application-specific pk generator, then I'd create
a CustomOpenBaseAdapter extends OpenBaseAdapter, and add:

    protected PkGenerator createPkGenerator() {
        return new CustomPkGenerator();
    }

You can specify your adapter class in your nodes manually.