public boolean drillDown(Record selectedRecord) {
    DrillDownInfo drillDownInfo = currentMode.drillDown(selectedRecord);
    if (drillDownInfo == null) {
      return false;
    }
    switchMode(drillDownInfo.getNextMode(), true, drillDownInfo.getInitialFilters());
    return true;
  }
The data and business logic for the top screen.
hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/screen/top/TopScreenModel.java