public boolean addFilter(String filterString, boolean ignoreCase) {
    RecordFilter filter = RecordFilter.parse(filterString, fields, ignoreCase);
    if (filter == null) {
      return false;
    }
    filters.add(filter);
    filterHistories.add(filterString);
    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