public static Class<? extends StoreFileTracker> getTrackerClass(Configuration conf) {
    try {
      Trackers tracker = Trackers.valueOf(getStoreFileTrackerName(conf).toUpperCase());
      return tracker.clazz;
    } catch (IllegalArgumentException e) {
      // Fall back to them specifying a class name
      return conf.getClass(TRACKER_IMPL, Trackers.DEFAULT.clazz, StoreFileTracker.class);
    }
  }
Maps between configuration names for trackers and implementation classes.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/StoreFileTrackerFactory.java