RowFilter's orFilter/andFilter are defined as:

      public static <M,I> RowFilter<M,I> orFilter(
            List<RowFilter<M, I>> filters) {

This means you can't create a filter for something like:

List<RowFilter<? super TableModel,Object>> filters;
CustomFilter customFilter = new CustomFilter();
RowFilter<Object,Object> regexFilter = RowFilter.regexFilter("blah");

filters = new ArrayList<RowFilter<? super TableModel,Object>>(1);
filters.add(regexFilter);
filter.add(customFilter);
RowFilter<? super TableModel,Object> orFilter = RowFilter.orFilter(filters);

private static class CustomFilter extends RowFilter<TableModel,Object> {
  public boolean include(
                Entry<? extends TableModel, ? extends Object> entry) {
    return true;
  }
}

orFilter/andFilter should be:

    public static <M,I> RowFilter<M,I> orFilter(
            List<? extends RowFilter<? super M, ? super I>> filters);
    public static <M,I> RowFilter<M,I> andFilter(
            List<? extends RowFilter<? super M, ? super I>> filters);