/** Returns the group results. */
Iterator<GroupItem> groupResults() {
if (_groupMap == null) return com.caucho.util.NullIterator.create();
Iterator<GroupItem> results = _groupMap.values().iterator();
_groupMap = null;
return results;
}
public static Iterator getIterator(Object items) throws JspTagException {
if (items == null) return NullIterator.create();
else if (items instanceof Map) return ((Map) items).entrySet().iterator();
else if (items instanceof Collection) return ((Collection) items).iterator();
else if (items.getClass().isArray()) return new ArrayIterator(items);
else if (items instanceof Iterator) return (Iterator) items;
else if (items instanceof Enumeration) return new EnumIterator((Enumeration) items);
else if (items instanceof String) return new StringIterator((String) items);
else throw new JspTagException(L.l("unknown items value `{0}'", items));
}