/**
* Return the configuration properties from the resource.
*
* <p>The default location of the variant configuration resource is:
*
* <pre>
* "$java.home/lib/" + resource-name
* </pre>
*
* @param resource the name of the calendar property resource
* @return a Properties containing the properties read from the resource.
* @throws Exception if access to the property resource fails
*/
private static Properties readConfigProperties(final String resource) throws Exception {
try {
return AccessController.doPrivileged(
(j86.java.security.PrivilegedExceptionAction<Properties>)
() -> {
String libDir = System.getProperty("java.home") + File.separator + "lib";
File file = new File(libDir, resource);
Properties props = new Properties();
try (InputStream is = new FileInputStream(file)) {
props.load(is);
}
return props;
});
} catch (PrivilegedActionException pax) {
throw pax.getException();
}
}
/**
* Create a HijrahChronology for the named variant. The resource and calendar type are retrieved
* from properties in the {@code calendars.properties}. The property names are {@code
* "calendar.hijrah." + id} and {@code "calendar.hijrah." + id + ".type"}
*
* @param id the id of the calendar
* @throws DateTimeException if the calendar type is missing from the properties file.
* @throws IllegalArgumentException if the id is empty
*/
private HijrahChronology(String id) throws DateTimeException {
if (id.isEmpty()) {
throw new IllegalArgumentException("calendar id is empty");
}
String propName = PROP_PREFIX + id + PROP_TYPE_SUFFIX;
String calType = calendarProperties.getProperty(propName);
if (calType == null || calType.isEmpty()) {
throw new DateTimeException("calendarType is missing or empty for: " + propName);
}
this.typeId = id;
this.calendarType = calType;
}
/**
* For each Hijrah variant listed, create the HijrahChronology and register it. Exceptions during
* initialization are logged but otherwise ignored.
*/
private static void registerVariants() {
for (String name : calendarProperties.stringPropertyNames()) {
if (name.startsWith(PROP_PREFIX)) {
String id = name.substring(PROP_PREFIX.length());
if (id.indexOf('.') >= 0) {
continue; // no name or not a simple name of a calendar
}
if (id.equals(INSTANCE.getId())) {
continue; // do not duplicate the default
}
try {
// Create and register the variant
HijrahChronology chrono = new HijrahChronology(id);
AbstractChronology.registerChrono(chrono);
} catch (DateTimeException ex) {
// Log error and continue
PlatformLogger logger = PlatformLogger.getLogger("j86.java.time.chrono");
logger.severe("Unable to initialize Hijrah calendar: " + id, ex);
}
}
}
}
/**
* Loads and processes the Hijrah calendar properties file for this calendarType. The starting
* Hijrah date and the corresponding ISO date are extracted and used to calculate the epochDate
* offset. The version number is identified and ignored. Everything else is the data for a year
* with containing the length of each of 12 months.
*
* @throws DateTimeException if initialization of the calendar data from the resource fails
*/
private void loadCalendarData() {
try {
String resourceName = calendarProperties.getProperty(PROP_PREFIX + typeId);
Objects.requireNonNull(
resourceName, "Resource missing for calendar: " + PROP_PREFIX + typeId);
Properties props = readConfigProperties(resourceName);
Map<Integer, int[]> years = new HashMap<>();
int minYear = Integer.MAX_VALUE;
int maxYear = Integer.MIN_VALUE;
String id = null;
String type = null;
String version = null;
int isoStart = 0;
for (Map.Entry<Object, Object> entry : props.entrySet()) {
String key = (String) entry.getKey();
switch (key) {
case KEY_ID:
id = (String) entry.getValue();
break;
case KEY_TYPE:
type = (String) entry.getValue();
break;
case KEY_VERSION:
version = (String) entry.getValue();
break;
case KEY_ISO_START:
{
int[] ymd = parseYMD((String) entry.getValue());
isoStart = (int) LocalDate.of(ymd[0], ymd[1], ymd[2]).toEpochDay();
break;
}
default:
try {
// Everything else is either a year or invalid
int year = Integer.valueOf(key);
int[] months = parseMonths((String) entry.getValue());
years.put(year, months);
maxYear = Math.max(maxYear, year);
minYear = Math.min(minYear, year);
} catch (NumberFormatException nfe) {
throw new IllegalArgumentException("bad key: " + key);
}
}
}
if (!getId().equals(id)) {
throw new IllegalArgumentException("Configuration is for a different calendar: " + id);
}
if (!getCalendarType().equals(type)) {
throw new IllegalArgumentException(
"Configuration is for a different calendar type: " + type);
}
if (version == null || version.isEmpty()) {
throw new IllegalArgumentException("Configuration does not contain a version");
}
if (isoStart == 0) {
throw new IllegalArgumentException("Configuration does not contain a ISO start date");
}
// Now create and validate the array of epochDays indexed by epochMonth
hijrahStartEpochMonth = minYear * 12;
minEpochDay = isoStart;
hijrahEpochMonthStartDays = createEpochMonths(minEpochDay, minYear, maxYear, years);
maxEpochDay = hijrahEpochMonthStartDays[hijrahEpochMonthStartDays.length - 1];
// Compute the min and max year length in days.
for (int year = minYear; year < maxYear; year++) {
int length = getYearLength(year);
minYearLength = Math.min(minYearLength, length);
maxYearLength = Math.max(maxYearLength, length);
}
} catch (Exception ex) {
// Log error and throw a DateTimeException
PlatformLogger logger = PlatformLogger.getLogger("j86.java.time.chrono");
logger.severe("Unable to initialize Hijrah calendar proxy: " + typeId, ex);
throw new DateTimeException("Unable to initialize HijrahCalendar: " + typeId, ex);
}
}