I have a parent class P with subclasses A and B.
I would like to find all usages of a method f of A.
So either p.f() or a.f() but not b.f(), because an instance B b cannot call A.f.
I know I can find
Calls directly to A.f. This misses:
P p = new A();
p.f();
Calls to P.f and any override. This has too many false positives.
I know there are always going to be false positives using only compile-time information, but there could be fewer.
You could use Structural Search (Edit | Find | Search Structurally...) for this. Use a query like:
$x$.f()
with expression type filter A|P. This will find all calls to f() on expressions of a type of either A or P. If you have any more classes in the hierarchy between A and P, you will need to add these to the expression type filter also.
Now it's possible to search usages in more depth. Just hit Ctrl+Shift+Alt+F7 instead of Alt+F7 and check what you want to search for. In your case, uncheck 'Search for base method usages'.
For more information check out the official site: https://www.jetbrains.com/help/idea/find-usages-method-options.html