That would be great, I looked already to the code base in the plug-in directory and it seems you use this call to get the clustering results:controller.query("lingo-nmf-km-3", "pseudo-query", requestParams); am I right ? anyway, I want to have the type of algorithm used for clustering, picked up from the xml file, it should be easy to do so.
Yes, it is quite easy -- the controller above can be instantiated from an XML file or from a Beanshell script using a local controller component (not in the Nutch codebase yet). There are unit tests of that controller in Carrot2 CVS, but it has been added recently so I didn't have the time to integrate it in a solid working example.
There is one potential problem that I see -- Nutch plugins require explicit JAR references. If you want to switch between algorithms you'll need to either put all Carrot2 JARs in the descriptor, put them in CLASSPATH before Nutch starts or do some other trickery with class loading.
I won't be able to help you until next week, but after then I'll try to find some time to prepare you an example of how the scriptable controller is used (or look at the unit tests, the component is called carrot2-local-controller.
Dawid
