/** Loads all labels from the specified URL. */
private static final void load(Map labels, URL url, String charset) throws IOException {
log.info("Opening " + url); // don't use MCommon since Messages might call getLabel
load(labels, url.openStream(), charset);
}
// -- private utilities --//
private final Map loadLabels(Locale locale) {
WaitLock lock = null;
for (; ; ) {
final Object o;
synchronized (_syncLabels) {
o = _syncLabels.get(locale);
if (o == null) _syncLabels.put(locale, lock = new WaitLock()); // lock it
}
if (o instanceof Map) return (Map) o;
if (o == null) break; // go to load the page
// wait because some one is creating the servlet
if (!((WaitLock) o).waitUntilUnlock(5 * 60 * 1000))
log.warning(
"Take too long to wait loading labels: "
+ locale
+ "\nTry to load again automatically...");
} // for(;;)
if (_jarcharset == null)
_jarcharset = Library.getProperty("org.zkoss.util.label.classpath.charset", "UTF-8");
if (_warcharset == null) {
_warcharset = Library.getProperty("org.zkoss.util.label.web.charset", null);
if (_warcharset == null)
_warcharset =
Library.getProperty(
"org.zkoss.util.label.WEB-INF.charset", "UTF-8"); // backward compatible
}
try {
// get the class name
if (locale != null) log.info("Loading labels for " + locale);
Map labels = new HashMap(512);
// 1. load from modules
final ClassLocator locator = new ClassLocator();
for (Enumeration en =
locator.getResources(
locale == null
? "metainfo/i3-label.properties"
: "metainfo/i3-label_" + locale + ".properties");
en.hasMoreElements(); ) {
final URL url = (URL) en.nextElement();
load(labels, url, _jarcharset);
}
// 2. load from extra resource
final List locators;
synchronized (_locators) {
locators = new LinkedList(_locators);
}
for (Iterator it = locators.iterator(); it.hasNext(); ) {
Object o = it.next();
if (o instanceof LabelLocator) {
final URL url = ((LabelLocator) o).locate(locale);
if (url != null) load(labels, url, _warcharset);
} else {
final LabelLocator2 loc = (LabelLocator2) o;
final InputStream is = loc.locate(locale);
if (is != null) {
final String cs = loc.getCharset();
load(labels, is, cs != null ? cs : _warcharset);
}
}
}
// Convert values to ExValue
toExValue(labels);
// merge with labels from 'super' locale
if (locale != null) {
final String lang = locale.getLanguage();
final String cnty = locale.getCountry();
final String var = locale.getVariant();
final Map superlabels =
loadLabels(
var != null && var.length() > 0
? new Locale(lang, cnty)
: cnty != null && cnty.length() > 0 ? new Locale(lang, "") : null);
if (labels.isEmpty()) {
labels = superlabels.isEmpty() ? Collections.EMPTY_MAP : superlabels;
} else if (!superlabels.isEmpty()) {
Map combined = new HashMap(superlabels);
combined.putAll(labels);
labels = combined;
}
}
// add to map
synchronized (_syncLabels) {
_syncLabels.put(locale, labels);
cloneLables();
}
return labels;
} catch (Throwable ex) {
synchronized (_syncLabels) {
_syncLabels.remove(locale);
cloneLables();
}
throw SystemException.Aide.wrap(ex);
} finally {
lock.unlock(); // unlock (always unlock to avoid deadlock)
}
}