public ColumnFilter getColumnFilter(String column) {
Iterator i = getAndFilter().getFilters().iterator();
while (i.hasNext()) {
ListFilter listFilter = (ListFilter) i.next();
if (ColumnFilter.class.isAssignableFrom(listFilter.getClass())) {
ColumnFilter columnFilter = (ColumnFilter) listFilter;
if (columnFilter.getColumnId().equals(column)) {
return columnFilter;
}
}
}
return null;