Forcing the developer to place a non-empty tag in the DialogFragment show method?

Question

I want to enforce the use of having a tag used in the show method for a DialogFragment:

MyDialogFragment fragment = MyDialogFragment.newInstance(args);
fragment.show(getSupportFragmentManager(), MANDATORY_TAG);

Is there a way to enforce this, or throw an error from within the fragment somehow, if MANDATORY_TAG is "" or null?

Answer 1

if (tag == null || tag.isEmpty()) {
            throw new NullPointerException("Please add the Tag. Tag cannot be null or empty");
        }

Edit:

try {
    MyDialogFragment fragment = MyDialogFragment.newInstance(args);
    fragment.show(getSupportFragmentManager(), MANDATORY_TAG);
} catch (NullPointerException e) {
    e.printStackTrace();
}