Apache NetBeans 19

How to get the project for the actual file in the editor?

Note: These pages are being reviewed.

get the project from the lookup of the active TopComponent AND/OR
get the project from the lookup of the active DataObject

Project p = TopComponent.getRegistry().getActivated().getLookup().lookup(Project.class);
if (p == null) {
    DataObject dob = TopComponent.getRegistry().getActivated().getLookup().lookup(DataObject.class);
    if (dob != null) {
       FileObject fo = dob.getPrimaryFile();
       p = FileOwnerQuery.getOwner(fo);
       ...

Taken from platform-dev mailing list / Tim Boudreau