/**
* 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;
}
}
/**
* Make a copy of this date, time, or dateTime value, but with a new type label
*
* @param typeLabel the type label to be attached to the new copy. It is the caller's
* responsibility to ensure that the value actually conforms to the rules for this type.
*/
public AtomicValue copyAsSubType(AtomicType typeLabel) {
DateTimeValue v =
new DateTimeValue(
year, month, day, hour, minute, second, microsecond, getTimezoneInMinutes());
v.typeLabel = typeLabel;
return v;
}
/**
* Factory method: create a dateTime value given a date and a time.
*
* @param date the date
* @param time the time
* @return the dateTime with the given components. If either component is null, returns null
* @throws XPathException if the timezones are both present and inconsistent
*/
public static DateTimeValue makeDateTimeValue(DateValue date, TimeValue time)
throws XPathException {
if (date == null || time == null) {
return null;
}
DayTimeDurationValue tz1 = (DayTimeDurationValue) date.getComponent(Component.TIMEZONE);
DayTimeDurationValue tz2 = (DayTimeDurationValue) time.getComponent(Component.TIMEZONE);
boolean zoneSpecified = (tz1 != null || tz2 != null);
if (tz1 != null && tz2 != null && !tz1.equals(tz2)) {
XPathException err = new XPathException("Supplied date and time are in different timezones");
err.setErrorCode("FORG0008");
throw err;
}
DateTimeValue v = new DateTimeValue();
v.year = (int) ((Int64Value) date.getComponent(Component.YEAR_ALLOWING_ZERO)).longValue();
v.month = (byte) ((Int64Value) date.getComponent(Component.MONTH)).longValue();
v.day = (byte) ((Int64Value) date.getComponent(Component.DAY)).longValue();
v.hour = (byte) ((Int64Value) time.getComponent(Component.HOURS)).longValue();
v.minute = (byte) ((Int64Value) time.getComponent(Component.MINUTES)).longValue();
final BigDecimal secs = ((DecimalValue) time.getComponent(Component.SECONDS)).getDecimalValue();
v.second = (byte) secs.intValue();
v.microsecond = secs.multiply(BigDecimal.valueOf(1000000)).intValue() % 1000000;
if (zoneSpecified) {
if (tz1 == null) {
tz1 = tz2;
}
v.setTimezoneInMinutes((int) (tz1.getLengthInMicroseconds() / 60000000));
}
v.typeLabel = BuiltInAtomicType.DATE_TIME;
return v;
}
/**
* Compare the value to another dateTime value, following the XPath comparison semantics
*
* @param other The other dateTime value
* @param context XPath dynamic evaluation context
* @return negative value if this one is the earler, 0 if they are chronologically equal, positive
* value if this one is the later. For this purpose, dateTime values with an unknown timezone
* are considered to be values in the implicit timezone (the Comparable interface requires a
* total ordering).
* @throws ClassCastException if the other value is not a DateTimeValue (the parameter is declared
* as CalendarValue to satisfy the interface)
* @throws NoDynamicContextException if the implicit timezone is needed and is not available
*/
public int compareTo(CalendarValue other, XPathContext context) throws NoDynamicContextException {
if (!(other instanceof DateTimeValue)) {
throw new ClassCastException("DateTime values are not comparable to " + other.getClass());
}
DateTimeValue v2 = (DateTimeValue) other;
if (getTimezoneInMinutes() == v2.getTimezoneInMinutes()) {
// both values are in the same timezone (explicitly or implicitly)
if (year != v2.year) {
return IntegerValue.signum(year - v2.year);
}
if (month != v2.month) {
return IntegerValue.signum(month - v2.month);
}
if (day != v2.day) {
return IntegerValue.signum(day - v2.day);
}
if (hour != v2.hour) {
return IntegerValue.signum(hour - v2.hour);
}
if (minute != v2.minute) {
return IntegerValue.signum(minute - v2.minute);
}
if (second != v2.second) {
return IntegerValue.signum(second - v2.second);
}
if (microsecond != v2.microsecond) {
return IntegerValue.signum(microsecond - v2.microsecond);
}
return 0;
}
return normalize(context).compareTo(v2.normalize(context), context);
}
/**
* Normalize the date and time to be in timezone Z.
*
* @param cc used to supply the implicit timezone, used when the value has no explicit timezone
* @return in general, a new DateTimeValue in timezone Z, representing the same instant in time.
* Returns the original DateTimeValue if this is already in timezone Z.
* @throws NoDynamicContextException if the implicit timezone is needed and is not available
*/
public DateTimeValue normalize(XPathContext cc) throws NoDynamicContextException {
if (hasTimezone()) {
return (DateTimeValue) adjustTimezone(0);
} else {
DateTimeValue dt = (DateTimeValue) copyAsSubType(null);
dt.setTimezoneInMinutes(cc.getImplicitTimezone());
return (DateTimeValue) dt.adjustTimezone(0);
}
}
/**
* Return a new dateTime with the same normalized value, but in a different timezone.
*
* @param timezone the new timezone offset, in minutes
* @return the date/time in the new timezone. This will be a new DateTimeValue unless no change
* was required to the original value
*/
public CalendarValue adjustTimezone(int timezone) {
if (!hasTimezone()) {
CalendarValue in = (CalendarValue) copyAsSubType(typeLabel);
in.setTimezoneInMinutes(timezone);
return in;
}
int oldtz = getTimezoneInMinutes();
if (oldtz == timezone) {
return this;
}
int tz = timezone - oldtz;
int h = hour;
int mi = minute;
mi += tz;
if (mi < 0 || mi > 59) {
h += Math.floor(mi / 60.0);
mi = (mi + 60 * 24) % 60;
}
if (h >= 0 && h < 24) {
return new DateTimeValue(
year, month, day, (byte) h, (byte) mi, second, microsecond, timezone);
}
// Following code is designed to handle the corner case of adjusting from -14:00 to +14:00 or
// vice versa, which can cause a change of two days in the date
DateTimeValue dt = this;
while (h < 0) {
h += 24;
DateValue t = DateValue.yesterday(dt.getYear(), dt.getMonth(), dt.getDay());
dt =
new DateTimeValue(
t.getYear(),
t.getMonth(),
t.getDay(),
(byte) h,
(byte) mi,
second,
microsecond,
timezone);
}
if (h > 23) {
h -= 24;
DateValue t = DateValue.tomorrow(year, month, day);
return new DateTimeValue(
t.getYear(),
t.getMonth(),
t.getDay(),
(byte) h,
(byte) mi,
second,
microsecond,
timezone);
}
return dt;
}
/**
* 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;
}
// Rules from XML Schema Part 2
public int compareTo(Object o) {
if (o instanceof DateTimeComparable) {
DateTimeValue dt0 = DateTimeValue.this;
DateTimeValue dt1 = ((DateTimeComparable) o).asDateTimeValue();
if (dt0.hasTimezone()) {
if (dt1.hasTimezone()) {
dt0 = (DateTimeValue) dt0.adjustTimezone(0);
dt1 = (DateTimeValue) dt1.adjustTimezone(0);
return dt0.compareTo(dt1);
} else {
DateTimeValue dt1max = (DateTimeValue) dt1.adjustTimezone(14 * 60);
if (dt0.compareTo(dt1max) < 0) {
return -1;
}
DateTimeValue dt1min = (DateTimeValue) dt1.adjustTimezone(-14 * 60);
if (dt0.compareTo(dt1min) > 0) {
return +1;
}
return INDETERMINATE_ORDERING;
}
} else {
if (dt1.hasTimezone()) {
DateTimeValue dt0min = (DateTimeValue) dt0.adjustTimezone(-14 * 60);
if (dt0min.compareTo(dt1) < 0) {
return -1;
}
DateTimeValue dt0max = (DateTimeValue) dt0.adjustTimezone(14 * 60);
if (dt0max.compareTo(dt1) > 0) {
return +1;
}
return INDETERMINATE_ORDERING;
} else {
dt0 = (DateTimeValue) dt0.adjustTimezone(0);
dt1 = (DateTimeValue) dt1.adjustTimezone(0);
return dt0.compareTo(dt1);
}
}
} else {
return INDETERMINATE_ORDERING;
}
}
