/**
* Return a calendar with the timezone field set, to be used for order comparison. If the original
* calendar did not specify a timezone, set the local timezone (unadjusted for daylight savings).
* The returned calendars will be totally ordered between themselves. We also set any missing
* fields to ensure that normalization doesn't discard important data! (This is probably a bug in
* the JAXP implementation, but the workaround doesn't hurt us, so it's faster to just fix it
* here.)
*
* @return the calendar represented by this object, with the timezone field filled in with an
* implicit value if necessary
*/
protected XMLGregorianCalendar getImplicitCalendar() {
if (implicitCalendar == null) {
implicitCalendar = (XMLGregorianCalendar) calendar.clone();
if (calendar.getTimezone() == DatatypeConstants.FIELD_UNDEFINED) {
implicitCalendar.setTimezone(TimeUtils.getInstance().getLocalTimezoneOffsetMinutes());
}
// fill in fields from default reference; don't have to worry about weird combinations of
// fields being set, since we control that on creation
switch (getType()) {
case Type.DATE:
implicitCalendar.setTime(0, 0, 0);
break;
case Type.TIME:
implicitCalendar.setYear(1972);
implicitCalendar.setMonth(12);
implicitCalendar.setDay(31);
break;
default:
}
implicitCalendar =
implicitCalendar
.normalize(); // the comparison routines will normalize it anyway, just do it once
// here
}
return implicitCalendar;
}
private static XMLGregorianCalendar stripCalendar(XMLGregorianCalendar calendar) {
calendar = (XMLGregorianCalendar) calendar.clone();
calendar.setYear(DatatypeConstants.FIELD_UNDEFINED);
calendar.setMonth(DatatypeConstants.FIELD_UNDEFINED);
calendar.setHour(DatatypeConstants.FIELD_UNDEFINED);
calendar.setMinute(DatatypeConstants.FIELD_UNDEFINED);
calendar.setSecond(DatatypeConstants.FIELD_UNDEFINED);
calendar.setMillisecond(DatatypeConstants.FIELD_UNDEFINED);
return calendar;
}
public Object toJavaObject(Class target) throws XPathException {
if (target == Object.class || target.isAssignableFrom(DateValue.class)) return this;
else if (target.isAssignableFrom(XMLGregorianCalendar.class)) return calendar.clone();
else if (target.isAssignableFrom(GregorianCalendar.class))
return calendar.toGregorianCalendar();
else if (target == Date.class) return calendar.toGregorianCalendar().getTime();
throw new XPathException(
"cannot convert value of type "
+ Type.getTypeName(getType())
+ " to Java object of type "
+ target.getName());
}
/**
* Add additional time in miliseconds
*
* @param value calendar whose value needs to be updated
* @param milis
* @return calendar value with the addition
* @throws ConfigurationException
*/
public static XMLGregorianCalendar add(XMLGregorianCalendar value, long milis)
throws ConfigurationException {
XMLGregorianCalendar newVal = (XMLGregorianCalendar) value.clone();
Duration duration;
try {
duration = newDatatypeFactory().newDuration(milis);
} catch (DatatypeConfigurationException e) {
throw logger.configurationError(e);
}
newVal.add(duration);
return newVal;
}
/**
* Utility method that is able to clone a calendar whose year is 0 (whatever a year 0 means). It
* looks like the JDK is unable to do that.
*
* @param calendar The Calendar to clone
* @return the cloned Calendar
*/
public static XMLGregorianCalendar cloneXMLGregorianCalendar(XMLGregorianCalendar calendar) {
boolean hacked = false;
if (calendar.getYear() == 0) {
calendar.setYear(1);
hacked = true;
}
XMLGregorianCalendar result = (XMLGregorianCalendar) calendar.clone();
if (hacked) {
// reset everything
calendar.setYear(0);
// -1 could also be considered
result.setYear(0);
}
return result;
}
public AbstractDateTimeValue adjustedToTimezone(DayTimeDurationValue offset)
throws XPathException {
if (offset == null)
offset = new DayTimeDurationValue(TimeUtils.getInstance().getLocalTimezoneOffsetMillis());
validateTimezone(offset);
XMLGregorianCalendar xgc = (XMLGregorianCalendar) calendar.clone();
if (xgc.getTimezone() != DatatypeConstants.FIELD_UNDEFINED) {
if (getType() == Type.DATE)
xgc.setTime(0, 0, 0); // set the fields so we don't lose precision when shifting timezones
xgc = xgc.normalize();
xgc.add(offset.duration);
}
try {
xgc.setTimezone((int) (offset.getValue() / 60));
} catch (IllegalArgumentException e) {
throw new XPathException("illegal timezone offset " + offset, e);
}
return createSameKind(xgc);
}
public Object clone() {
return calendar.clone();
}
public GDayValue(XMLGregorianCalendar calendar) throws XPathException {
super(stripCalendar((XMLGregorianCalendar) calendar.clone()));
}
public AbstractDateTimeValue withoutTimezone() throws XPathException {
XMLGregorianCalendar xgc = (XMLGregorianCalendar) calendar.clone();
xgc.setTimezone(DatatypeConstants.FIELD_UNDEFINED);
return createSameKind(xgc);
}
