I've never used the velocity generator before so I may be off-base. But IIUC ...
I don't think you generally add objects into the map. Rather, the map comes
pre-populated with objects that your code needs: request, response, etc.
e.g.:
public class
YourGenerator extends ComposerGenerator {
public void
setup(SourceResolver resolver, Map objectModel, String src, Parameters par)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, par);
Request request = (Request)objectModel.get(Constants.REQUEST_OBJECT);
//System.out.println("request: "+request+"; rtf gen setup called @ "+new
java.util.Date());
String filename = request.getParameter("filename");
Note how in this generator, you can get a hold of the request object from out of the
object map.
So the "export-object" parameter that you were referring to is a means of transferring
these objects from Cocoon's object map into a place where velocity can find them.
According to the docs:
" Default Java objects exported to the Velocity context:
* request (org.apache.cocoon.environment.Request) -
* The Cocoon current request template (java.lang.String) -
* The path of the template file currently being evaluated response
(org.apache.cocoon.environment.Response) -
* The Cocoon response associated with the current request context
(org.apache.cocoon.environment.Context) -
* The Cocoon context associated with the current request parameters
(org.apache.avalon.framework.parameters.Parameters) -
Any parameters passed to the generator in the pipeline
"
That seems to pretty much cover most of the important object map objects that I think
you'd want to pass to velocity, so it doesn't seem like there'd be much need to use
this parameter.
I suppose if you wanted to, though, you could add an object of your own to the object
map (see the generator code above; you could do this in an action too), and then have
that object get copied over to velocity using the "export-object" parm.
Whew! Sorry for being so long winded. Hope this helps. Best I could do. Someone
correct me if I'm wrong.
DR
At 04:23 PM 12/20/01 +0000, you wrote:
>Anyone?
>Help?
>
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > Sent: 20 December 2001 00:18
> > To: [EMAIL PROTECTED]
> > Subject: How do I add objects to the objectModel Map
> >
> >
> > Hi
> >
> > I hope this is straightforward...
> >
> > How do I add objects to the objectModel Map?
> >
> > http://xml.apache.org/cocoon/userdocs/generators/velocity-gene
>rator.html
>says:
><export-object key="objectMapKey" name="velocityContextName"/> (optional;
>0..n) - Export the object specified by key from the Cocoon object map to the
>Velocity context of the template. The object can be accessed from the
>template as name. Be careful to use a valid VTL variable name.
>
>I've looked through the code but can't figure this one out.
>
>David
>
>
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