Generate Class diagram from a plugin

Hi,

I'd like to generate a class diagram from a plugin. Is there a basic API to intellij UML functionality?

1) how to generate the UML model.

2) How to generate the class diagram from that data model?

3) Can I implement my own filter? Intellj offers filters in the top bar "Fields, Constructors, methods" for that you can see only items you are interested in. My aim is to have a filter which will show just some methods. I can mark those methods on the data model.

I'd like to stay as close to intellij API as possible in order to have my plugin stable with new versions of idea.

Any advice is appreciated.