/**
* Obtains an instance defining a transition between two offsets.
*
* <p>Applications should normally obtain an instance from {@link ZoneRules}. This factory is only
* intended for use when creating {@link ZoneRules}.
*
* @param transition the transition date-time at the transition, which never actually occurs,
* expressed local to the before offset, not null
* @param offsetBefore the offset before the transition, not null
* @param offsetAfter the offset at and after the transition, not null
* @return the transition, not null
* @throws IllegalArgumentException if {@code offsetBefore} and {@code offsetAfter} are equal, or
* {@code transition.getNano()} returns non-zero value
*/
public static ZoneOffsetTransition of(
LocalDateTime transition, ZoneOffset offsetBefore, ZoneOffset offsetAfter) {
Objects.requireNonNull(transition, "transition");
Objects.requireNonNull(offsetBefore, "offsetBefore");
Objects.requireNonNull(offsetAfter, "offsetAfter");
if (offsetBefore.equals(offsetAfter)) {
throw new IllegalArgumentException("Offsets must not be equal");
}
if (transition.getNano() != 0) {
throw new IllegalArgumentException("Nano-of-second must be zero");
}
return new ZoneOffsetTransition(transition, offsetBefore, offsetAfter);
}
/**
* Obtains an instance of {@code ZoneOffset} from a temporal object.
*
* <p>This obtains an offset based on the specified temporal. A {@code TemporalAccessor}
* represents an arbitrary set of date and time information, which this factory converts to an
* instance of {@code ZoneOffset}.
*
* <p>A {@code TemporalAccessor} represents some form of date and time information. This factory
* converts the arbitrary temporal object to an instance of {@code ZoneOffset}.
*
* <p>The conversion uses the {@link TemporalQueries#offset()} query, which relies on extracting
* the {@link ChronoField#OFFSET_SECONDS OFFSET_SECONDS} field.
*
* <p>This method matches the signature of the functional interface {@link TemporalQuery} allowing
* it to be used in queries via method reference, {@code ZoneOffset::from}.
*
* @param temporal the temporal object to convert, not null
* @return the zone-offset, not null
* @throws DateTimeException if unable to convert to an {@code ZoneOffset}
*/
public static ZoneOffset from(TemporalAccessor temporal) {
Objects.requireNonNull(temporal, "temporal");
ZoneOffset offset = temporal.query(TemporalQueries.offset());
if (offset == null) {
throw new DateTimeException(
"Unable to obtain ZoneOffset from TemporalAccessor: "
+ temporal
+ " of type "
+ temporal.getClass().getName());
}
return offset;
}
/**
* Obtains an instance of {@code ZoneOffset} using the ID.
*
* <p>This method parses the string ID of a {@code ZoneOffset} to return an instance. The parsing
* accepts all the formats generated by {@link #getId()}, plus some additional formats:
*
* <ul>
* <li>{@code Z} - for UTC
* <li>{@code +h}
* <li>{@code +hh}
* <li>{@code +hh:mm}
* <li>{@code -hh:mm}
* <li>{@code +hhmm}
* <li>{@code -hhmm}
* <li>{@code +hh:mm:ss}
* <li>{@code -hh:mm:ss}
* <li>{@code +hhmmss}
* <li>{@code -hhmmss}
* </ul>
*
* Note that ± means either the plus or minus symbol.
*
* <p>The ID of the returned offset will be normalized to one of the formats described by {@link
* #getId()}.
*
* <p>The maximum supported range is from +18:00 to -18:00 inclusive.
*
* @param offsetId the offset ID, not null
* @return the zone-offset, not null
* @throws DateTimeException if the offset ID is invalid
*/
@SuppressWarnings("fallthrough")
public static ZoneOffset of(String offsetId) {
Objects.requireNonNull(offsetId, "offsetId");
// "Z" is always in the cache
ZoneOffset offset = ID_CACHE.get(offsetId);
if (offset != null) {
return offset;
}
// parse - +h, +hh, +hhmm, +hh:mm, +hhmmss, +hh:mm:ss
final int hours, minutes, seconds;
switch (offsetId.length()) {
case 2:
offsetId = offsetId.charAt(0) + "0" + offsetId.charAt(1); // fallthru
case 3:
hours = parseNumber(offsetId, 1, false);
minutes = 0;
seconds = 0;
break;
case 5:
hours = parseNumber(offsetId, 1, false);
minutes = parseNumber(offsetId, 3, false);
seconds = 0;
break;
case 6:
hours = parseNumber(offsetId, 1, false);
minutes = parseNumber(offsetId, 4, true);
seconds = 0;
break;
case 7:
hours = parseNumber(offsetId, 1, false);
minutes = parseNumber(offsetId, 3, false);
seconds = parseNumber(offsetId, 5, false);
break;
case 9:
hours = parseNumber(offsetId, 1, false);
minutes = parseNumber(offsetId, 4, true);
seconds = parseNumber(offsetId, 7, true);
break;
default:
throw new DateTimeException("Invalid ID for ZoneOffset, invalid format: " + offsetId);
}
char first = offsetId.charAt(0);
if (first != '+' && first != '-') {
throw new DateTimeException(
"Invalid ID for ZoneOffset, plus/minus not found when expected: " + offsetId);
}
if (first == '-') {
return ofHoursMinutesSeconds(-hours, -minutes, -seconds);
} else {
return ofHoursMinutesSeconds(hours, minutes, seconds);
}
}
/**
* 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);
}
}
