There is an active community on Reddit (r/blackberry) and Discord dedicated to reverse-engineering legacy BBOS apps. New .cod patches appear occasionally, like one that re-adds a partially working weather app using OpenWeatherMap API.
Here’s a concise summary about :
// Loading an object PersistentObject persist = PersistentStore.getPersistentObject(0xDEC0DE); Vector storedData = (Vector) persist.getContents(); blackberry os 7 apps