sclass JConceptsTable<A extends Concept> {
  Class<? extends A> conceptClass;
  Concepts concepts;
  JTable table;
  
  // options
  IF1<A, Map> renderer;
  L<S> dropFields;
  IF1<L> postProcess;
  Runnable afterUpdate;
  bool latestFirst;
  IF1<Cl<A>> sorter;
  int idWidth = 50;
  int updateInterval = 1000;

  *(Class<? extends A> *conceptClass) {
    showAsFrame();
  }
  
  S defaultTitle() {
    ret plural(shortClassName(conceptClass));
  }
  
  void showAsFrame(S title default defaultTitle()) {
    makeTable();
    showFrame(title, table);
  }
  
  void makeTable {
    if (table != null) ret;
    if (concepts == null) concepts = db_mainConcepts();

    table = sexyTable();
    awtOnConceptChanges(table, updateInterval, r {
      new L<Map> data;
      Cl<? extends A> l = list(concepts, conceptClass);
      l = postProcess(sorter, l);
      for (A c : l)
        addIfNotNull(data, pcallF(renderer, c));
      if (latestFirst) reverseInPlace(data);
      data = (L) postProcess(postProcess, data);
      dataToTable_uneditable(data, table);
      pcallF(afterUpdate);
    });
  }

  JComponent visualize() {
    makeTable();
    ret table;
  }
}