/**
* Process the start of this tag.
*
* @return int status
* @exception JspException if a JSP exception has occurred
* @see javax.servlet.jsp.tagext.Tag#doStartTag()
*/
public int doStartTag() throws JspException {
ExpressionEvaluator eval = new ExpressionEvaluator(this, pageContext);
if (selected != null) {
selected = eval.evalString("default", selected);
}
Locale userLocale = pageContext.getRequest().getLocale();
List countries = this.buildCountryList(userLocale);
if (scope != null) {
if (scope.equals("page")) {
pageContext.setAttribute(name, countries);
} else if (scope.equals("request")) {
pageContext.getRequest().setAttribute(name, countries);
} else if (scope.equals("session")) {
pageContext.getSession().setAttribute(name, countries);
} else if (scope.equals("application")) {
pageContext.getServletContext().setAttribute(name, countries);
} else {
throw new JspException("Attribute 'scope' must be: page, request, session or application");
}
} else {
StringBuffer sb = new StringBuffer();
sb.append("<select name=\"" + name + "\" id=\"" + name + "\" class=\"form-control\">\n");
if (prompt != null) {
sb.append(" <option value=\"\" selected=\"selected\">");
sb.append(eval.evalString("prompt", prompt) + "</option>\n");
}
for (Iterator i = countries.iterator(); i.hasNext(); ) {
LabelValue country = (LabelValue) i.next();
sb.append(" <option value=\"" + country.getValue() + "\"");
if ((selected != null) && selected.equals(country.getValue())) {
sb.append(" selected=\"selected\"");
}
sb.append(">" + country.getLabel() + "</option>\n");
}
sb.append("</select>");
try {
pageContext.getOut().write(sb.toString());
} catch (IOException io) {
throw new JspException(io);
}
}
return super.doStartTag();
}
/**
* Build a List of LabelValues for all the available countries. Uses the two letter uppercase ISO
* name of the country as the value and the localized country name as the label.
*
* @param locale The Locale used to localize the country names.
* @return List of LabelValues for all available countries.
*/
@SuppressWarnings("unchecked")
public Map<String, String> getCountries(Locale locale) {
if (availableCountries == null) {
final String EMPTY = "";
final Locale[] available = Locale.getAvailableLocales();
List<LabelValue> countries = new ArrayList<LabelValue>();
countries.add(new LabelValue("", ""));
for (Locale anAvailable : available) {
final String iso = anAvailable.getCountry();
final String name = anAvailable.getDisplayCountry(locale);
if (!EMPTY.equals(iso) && !EMPTY.equals(name)) {
LabelValue country = new LabelValue(name, iso);
if (!countries.contains(country)) {
countries.add(new LabelValue(name, iso));
}
}
}
Collections.sort(countries, new LabelValueComparator(locale));
Map<String, String> options = new LinkedHashMap<String, String>();
// loop through and convert list to a JSF-Friendly Map for a <select>
for (Object country : countries) {
LabelValue option = (LabelValue) country;
if (!options.containsValue(option.getValue())) {
options.put(option.getLabel(), option.getValue());
}
}
this.availableCountries = options;
}
return availableCountries;
}
/**
* Compares the localized labels of two LabelValues.
*
* @param o1 The first LabelValue to compare.
* @param o2 The second LabelValue to compare.
* @return The value returned by comparing the localized labels.
*/
public final int compare(Object o1, Object o2) {
LabelValue lhs = (LabelValue) o1;
LabelValue rhs = (LabelValue) o2;
return c.compare(lhs.getLabel(), rhs.getLabel());
}