/**
* Add a duration to a dateTime
*
* @param duration the duration to be added (may be negative)
* @return the new date
* @throws net.sf.saxon.trans.XPathException if the duration is an xs:duration, as distinct from a
* subclass thereof
*/
public CalendarValue add(DurationValue duration) throws XPathException {
if (duration instanceof DayTimeDurationValue) {
long microseconds = ((DayTimeDurationValue) duration).getLengthInMicroseconds();
BigDecimal seconds =
BigDecimal.valueOf(microseconds)
.divide(DecimalValue.BIG_DECIMAL_ONE_MILLION, 6, BigDecimal.ROUND_HALF_EVEN);
BigDecimal julian = toJulianInstant();
julian = julian.add(seconds);
DateTimeValue dt = fromJulianInstant(julian);
dt.setTimezoneInMinutes(getTimezoneInMinutes());
return dt;
} else if (duration instanceof YearMonthDurationValue) {
int months = ((YearMonthDurationValue) duration).getLengthInMonths();
int m = (month - 1) + months;
int y = year + m / 12;
m = m % 12;
if (m < 0) {
m += 12;
y -= 1;
}
m++;
int d = day;
while (!DateValue.isValidDate(y, m, d)) {
d -= 1;
}
return new DateTimeValue(
y, (byte) m, (byte) d, hour, minute, second, microsecond, getTimezoneInMinutes());
} else {
XPathException err =
new XPathException(
"DateTime arithmetic is not supported on xs:duration, only on its subtypes");
err.setIsTypeError(true);
throw err;
}
}
/**
* Factory method: create a dateTime value from a supplied string, in ISO 8601 format
*
* @param s a string in the lexical space of xs:dateTime
* @return either a DateTimeValue representing the xs:dateTime supplied, or a ValidationFailure if
* the lexical value was invalid
*/
public static ConversionResult makeDateTimeValue(CharSequence s) {
// input must have format [-]yyyy-mm-ddThh:mm:ss[.fff*][([+|-]hh:mm | Z)]
DateTimeValue dt = new DateTimeValue();
StringTokenizer tok =
new StringTokenizer(Whitespace.trimWhitespace(s).toString(), "-:.+TZ", true);
if (!tok.hasMoreElements()) {
return badDate("too short", s);
}
String part = (String) tok.nextElement();
int era = +1;
if ("+".equals(part)) {
return badDate("Date must not start with '+' sign", s);
} else if ("-".equals(part)) {
era = -1;
if (!tok.hasMoreElements()) {
return badDate("No year after '-'", s);
}
part = (String) tok.nextElement();
}
int value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric year component", s);
}
dt.year = value * era;
if (part.length() < 4) {
return badDate("Year is less than four digits", s);
}
if (part.length() > 4 && part.charAt(0) == '0') {
return badDate("When year exceeds 4 digits, leading zeroes are not allowed", s);
}
if (dt.year == 0) {
return badDate("Year zero is not allowed", s);
}
if (era < 0) {
dt.year++; // internal representation allows a year zero.
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
if (!"-".equals(tok.nextElement())) {
return badDate("Wrong delimiter after year", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Month must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric month component", s);
}
dt.month = (byte) value;
if (dt.month < 1 || dt.month > 12) {
return badDate("Month is out of range", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
if (!"-".equals(tok.nextElement())) {
return badDate("Wrong delimiter after month", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Day must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric day component", s);
}
dt.day = (byte) value;
if (dt.day < 1 || dt.day > 31) {
return badDate("Day is out of range", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
if (!"T".equals(tok.nextElement())) {
return badDate("Wrong delimiter after day", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Hour must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric hour component", s);
}
dt.hour = (byte) value;
if (dt.hour > 24) {
return badDate("Hour is out of range", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
if (!":".equals(tok.nextElement())) {
return badDate("Wrong delimiter after hour", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Minute must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric minute component", s);
}
dt.minute = (byte) value;
if (dt.minute > 59) {
return badDate("Minute is out of range", s);
}
if (dt.hour == 24 && dt.minute != 0) {
return badDate("If hour is 24, minute must be 00", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
if (!":".equals(tok.nextElement())) {
return badDate("Wrong delimiter after minute", s);
}
if (!tok.hasMoreElements()) {
return badDate("Too short", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Second must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric second component", s);
}
dt.second = (byte) value;
if (dt.second > 59) {
return badDate("Second is out of range", s);
}
if (dt.hour == 24 && dt.second != 0) {
return badDate("If hour is 24, second must be 00", s);
}
int tz = 0;
int state = 0;
while (tok.hasMoreElements()) {
if (state == 9) {
return badDate("Characters after the end", s);
}
String delim = (String) tok.nextElement();
if (".".equals(delim)) {
if (state != 0) {
return badDate("Decimal separator occurs twice", s);
}
if (!tok.hasMoreElements()) {
return badDate("Decimal point must be followed by digits", s);
}
part = (String) tok.nextElement();
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric fractional seconds component", s);
}
double fractionalSeconds = Double.parseDouble('.' + part);
dt.microsecond = (int) (Math.round(fractionalSeconds * 1000000));
if (dt.hour == 24 && dt.microsecond != 0) {
return badDate("If hour is 24, fractional seconds must be 0", s);
}
state = 1;
} else if ("Z".equals(delim)) {
if (state > 1) {
return badDate("Z cannot occur here", s);
}
tz = 0;
state = 9; // we've finished
dt.setTimezoneInMinutes(0);
} else if ("+".equals(delim) || "-".equals(delim)) {
if (state > 1) {
return badDate(delim + " cannot occur here", s);
}
state = 2;
if (!tok.hasMoreElements()) {
return badDate("Missing timezone", s);
}
part = (String) tok.nextElement();
if (part.length() != 2) {
return badDate("Timezone hour must be two digits", s);
}
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric timezone hour component", s);
}
tz = value;
if (tz > 14) {
return badDate("Timezone is out of range (-14:00 to +14:00)", s);
}
tz *= 60;
if ("-".equals(delim)) {
tz = -tz;
}
} else if (":".equals(delim)) {
if (state != 2) {
return badDate("Misplaced ':'", s);
}
state = 9;
part = (String) tok.nextElement();
value = DurationValue.simpleInteger(part);
if (value < 0) {
return badDate("Non-numeric timezone minute component", s);
}
int tzminute = value;
if (part.length() != 2) {
return badDate("Timezone minute must be two digits", s);
}
if (tzminute > 59) {
return badDate("Timezone minute is out of range", s);
}
if (tz < 0) {
tzminute = -tzminute;
}
if (Math.abs(tz) == 14 * 60 && tzminute != 0) {
return badDate("Timezone is out of range (-14:00 to +14:00)", s);
}
tz += tzminute;
dt.setTimezoneInMinutes(tz);
} else {
return badDate("Timezone format is incorrect", s);
}
}
if (state == 2 || state == 3) {
return badDate("Timezone incomplete", s);
}
boolean midnight = false;
if (dt.hour == 24) {
dt.hour = 0;
midnight = true;
}
// Check that this is a valid calendar date
if (!DateValue.isValidDate(dt.year, dt.month, dt.day)) {
return badDate("Non-existent date", s);
}
// Adjust midnight to 00:00:00 on the next day
if (midnight) {
DateValue t = DateValue.tomorrow(dt.year, dt.month, dt.day);
dt.year = t.getYear();
dt.month = t.getMonth();
dt.day = t.getDay();
}
dt.typeLabel = BuiltInAtomicType.DATE_TIME;
return dt;
}