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/** Gets available locales for given resource and set.
* @param resourceID The resource ID.
* @param set The resource set.
* @return An array of <code>Locale</code> instance, never <code>null</code>.
* @since 2.9
*/
public Locale[] getAvailableLocales(String resourceID, String set) {
if ( (resourceID == null) || (resourceID.trim().length() == 0)) {
resourceID = ResourceConstants.STRING_RESOURCE;
}
if ( (set == null) || (set.trim().length() == 0)) {
set = DEFAULT_SET;
}
String bundlePath = ResourceConstants.RESOURCES_PATH + set + ResourceConstants.FILE_SEPARATOR;
final String basePrefix = bundlePath + resourceID;
final String baseSuffix = ".properties";
String baseFile = basePrefix + baseSuffix;
URL url = getClass().getClassLoader().getResource(baseFile);
System.out.println(bundlePath + " => " + url);
Locale[] result = null;
// We have a hold on a base translation file.
if (url != null) {
java.util.List<Locale> localeList = null;
String filePath = url.toString();
//System.out.println("The file path is " + filePath);
java.util.List<String> filenameList = null;
boolean useJar = false;
////////////////////////////////
// We are currently accessing a JAR file.
if (filePath.startsWith("jar:")) {
useJar = true;
// Beware of different protocols and platforms.
// Works under Windows.
/** @todo Should be tested on Linux, Mac and Java Web Start ASAP. */
/** @todo test, test and test !*/
filePath = filePath.replaceFirst("jar:file:/", "");
int index = filePath.indexOf("!");
filePath = filePath.substring(0, index);
//System.out.println("Trying to open " + filePath + " as a JAR");
try {
JarFile jar = new JarFile(filePath);
// Unfortunatly it seems it's impossible to get the content of a directory in a JAR.
// As of NOW we scan through the entire list of entries.
// It seems to be reasonably fast though.
Enumeration<JarEntry> entries = jar.entries();
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
String entryName = entry.getName();
if (entryName.contains(basePrefix) && entryName.endsWith(baseSuffix)) {
if (filenameList == null) {
filenameList = new LinkedList<String>();
}
filenameList.add(entryName);
//System.out.printf("%s, directory %b\n", entry.getName(), entry.isDirectory());
}
}
}
catch (IOException ioe) {
ioe.printStackTrace();
}
}
////////////////////////////////
// We are currently accessing a directory.
else {
File hostDirectory = new File(url.getFile()).getParentFile();
if ( (hostDirectory != null)) { //&& (hostDirectory.isDirectory())) {
//System.out.printf("File %s (%s), exist %b, directory %b, readable %b\n", hostDirectory, url.toString(), hostDirectory.exists(), hostDirectory.isDirectory(), hostDirectory.canRead());
final String resourceName = resourceID;
FileFilter filter = new FileFilter() {
/** {@inheritDoc}
*/
public boolean accept(File pathname) {
String path = pathname.getName();
return (path.startsWith(resourceName) && path.endsWith(baseSuffix));
}
};
File[] files = hostDirectory.listFiles(filter);
if (files != null) {
filenameList = new LinkedList<String>();
for (File file : files) {
filenameList.add(file.getName());
}
}
}
}
////////////////////////////////
// Create locales from the filenames.
if ( (filenameList != null) && (filenameList.size() > 0)) {
localeList = new LinkedList<Locale>();
for (String name : filenameList) {
if (useJar) {
name = name.replaceAll(basePrefix, "");
}
else {
name = name.replaceAll(resourceID, "");
}
name = name.replaceAll(baseSuffix, "");
if (name.startsWith("_")) {
name = name.substring(1);
}
Locale locale = ResourceConstants.DEFAULT_LOCALE;
if (name.length() > 0) {
String language = "";
String country = "";
String variant = "";
StringTokenizer tokenizer = new StringTokenizer(name, "_");
if (tokenizer.countTokens() >= 1) {
language = tokenizer.nextToken();
}
if (tokenizer.countTokens() >= 1) {
country = tokenizer.nextToken();
}
if (tokenizer.countTokens() >= 1) {
variant = tokenizer.nextToken();
}
locale = new Locale(language, country, variant);
}
if (!localeList.contains(locale)) {
//System.out.println("Found locale " + locale);
localeList.add(locale);
}
}
////////////////////////////////
// Transform into array.
result = new Locale[localeList.size()];
result = localeList.toArray(result);
localeList.clear();
}
}
////////////////////////////////
// Could not get locales from file inspection, return locales supported by the JVM.
// This operation can take a long time to execute.
if (result == null) {
result = Locale.getAvailableLocales();
}
return result;
} |
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