/**
* {@link IntlAbstractOperations#JDK_TIMEZONE_NAMES}
*
* @param tzdataDir the tzdata directory
* @throws IOException if an I/O error occurs
*/
static void jdkTimezoneNames(Path tzdataDir) throws IOException {
Pattern pZone = Pattern.compile("Zone\\s+([a-zA-Z0-9_+\\-/]+)\\s+.*");
Pattern pLink =
Pattern.compile("Link\\s+([a-zA-Z0-9_+\\-/]+)\\s+([a-zA-Z0-9_+\\-/]+)(?:\\s+#.*)?");
Pattern pFileName = Pattern.compile("[a-z0-9]+");
HashSet<String> ignoreFiles = new HashSet<>(Arrays.asList("backzone"));
TreeSet<String> names = new TreeSet<>();
TreeMap<String, String> links = new TreeMap<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStream(tzdataDir)) {
for (Path path : stream) {
String filename = Objects.requireNonNull(path.getFileName()).toString();
if (pFileName.matcher(filename).matches() && !ignoreFiles.contains(filename)) {
try (BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8)) {
for (String line; (line = reader.readLine()) != null; ) {
if (line.startsWith("Zone")) {
Matcher m = pZone.matcher(line);
if (!m.matches()) {
System.out.println(line);
}
String name = m.group(1);
boolean changed = names.add(name);
assert changed : line;
} else if (line.startsWith("Link")) {
Matcher m = pLink.matcher(line);
if (!m.matches()) {
System.out.println(line);
}
String target = m.group(1);
String source = m.group(2);
boolean changed = links.put(source, target) == null;
assert changed : String.format("%s: %s", filename, line);
}
}
}
}
}
}
TreeSet<String> allnames = new TreeSet<>();
allnames.addAll(names);
for (Map.Entry<String, String> link : links.entrySet()) {
assert allnames.contains(link.getValue());
boolean changed = allnames.add(link.getKey());
assert changed : link;
}
TreeSet<String> ids =
new TreeSet<>(TimeZone.getAvailableIDs(SystemTimeZoneType.ANY, null, null));
for (String id : new HashSet<>(ids)) {
if (id.startsWith("SystemV/")) {
ids.remove(id);
}
}
System.out.println(allnames);
System.out.println(ids.size());
System.out.println(allnames.size());
TreeSet<String> jdkTimeZones = new TreeSet<>(ids);
jdkTimeZones.removeAll(allnames);
for (String name : jdkTimeZones) {
System.out.printf("\"%s\",", name);
}
}
public void testIcuTimezones() throws Exception {
validateTimezoneIds(com.ibm.icu.util.TimeZone.getAvailableIDs());
}