如何知道触发事件的动作是什么？

org.w3c.dom.events.EventListener refreshAnnotationsListener = new org.w3c.dom.events.EventListener() { 
    @Override
    public void handleEvent(org.w3c.dom.events.Event event) {
       // how do I know the action which triggered this event?
    }
};

new Exception().printStackTrace();