Review

finding-12

org/w3c/jigsaw/servlet/JigsawHttpServletRequest.java

getLocales()

class JigsawHttpServletRequest {
    /**
     * Returns an <code>Enumeration</code> of <code>Locale</code> objects
     * indicating, in decreasing order starting with the preferred locale, the
     * locales that are acceptable to the client based on the Accept-Language
     * header.
     * If the client request doesn't provide an Accept-Language header,
     * this method returns an <code>Enumeration</code> containing one 
     * <code>Locale</code>, the default locale for the server.
     *
     * @return an <code>Enumeration</code> of preferred 
     * <code>Locale</code> objects for the client
     */
    public Enumeration getLocales() {
	HttpAcceptLanguage languages[] = request.getAcceptLanguage();
	if (languages == null) {
	    Vector def = new Vector();
            def.addElement(Locale.getDefault());
            return def.elements();
	}
	//LinkedList is better, but we must be JDK1.1 compliant
	Vector locales = new Vector(); 
	for (int i = 0 ; i < languages.length ; i++) {
	    HttpAcceptLanguage language = languages[i];
	    double quality = language.getQuality();
	    String lang    = language.getLanguage();
	    String country = "";
	    int    idx     = lang.indexOf('-');
	    if (idx > -1) {
		country = lang.substring(idx + 1).trim();
		lang    = lang.substring(0, idx).trim();
	    }
	    // insert the Locale in ordered list
	    int     qidx = 0;
	    int     size = locales.size();
	    if (size > 0) {
		QLocale ql   = (QLocale) locales.firstElement();
		while ((qidx < size) && (ql.getLanguageQuality() >= quality)) {
		    try {
			ql = (QLocale) locales.elementAt(++qidx);
		    } catch (ArrayIndexOutOfBoundsException ex) {
			//end of vector, so append
		    }
		}
		locales.insertElementAt(new QLocale(lang, country, quality),
					qidx);
	    } else {
		locales.addElement(new QLocale(lang, country, quality));
	    }
	}
	// because Locale is final :(
	int    size    = locales.size(); 
	Vector vlocale = new Vector(size);
	for (int i = 0 ; i < size ; i ++) {
	    vlocale.addElement(((QLocale)locales.elementAt(i)).getLocale());
	}
	return vlocale.elements();
    }
}