/** Returns the next language in the list or null if there aren't any. */
public String getNextLanguage() {
_ndx++;
if (_ndx >= _list.size()) return null;
Lang l = (Lang) _list.elementAt(_ndx);
return l.lang;
}
/**
* Constructs a new LanguagePreference object. The passed string should be an http Accept-Language
* header.
*/
public LanguagePreferences(String langString) {
Hashtable specific = new Hashtable();
StringTokenizer t = new StringTokenizer(langString, ",");
float ndx = 0.000099F;
while (t.hasMoreTokens()) {
String tok = t.nextToken().trim();
String lang = null;
float weight = 1.0F;
int pos = tok.indexOf(';');
if (pos == -1) lang = tok;
else {
lang = tok.substring(0, pos);
pos = tok.indexOf('=');
if (pos > -1) {
String work = tok.substring(pos + 1);
try {
weight = Float.parseFloat(work);
} catch (Exception e) {
}
;
}
}
if (lang == null) continue;
Lang l = new Lang();
l.lang = lang.toLowerCase();
l.weight = weight + ndx;
ndx -= 0.000001F;
_list.add(l);
pos = lang.indexOf("-");
if (pos == -1) specific.put(lang, lang);
}
_list.sort();
int size = _list.size();
for (int i = 0; i < size; i++) {
Lang l = (Lang) _list.elementAt(i);
String lang = l.lang;
int pos = lang.indexOf('-');
if (pos > -1) {
lang = lang.substring(0, pos);
if (!specific.containsKey(lang)) {
l = new Lang();
l.lang = lang;
_list.add(l);
specific.put(lang, lang);
}
}
}
}
