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org.apache.xalan.lib
Class ExsltDatetime

java.lang.Object
  extended by org.apache.xalan.lib.ExsltDatetime

public class ExsltDatetime
extends java.lang.Object

This class contains EXSLT dates and times extension functions. It is accessed by specifying a namespace URI as follows: 

    xmlns:datetime="http://exslt.org/dates-and-times"
The documentation for each function has been copied from the relevant EXSLT Implementer page.

See Also:
EXSLT

Field Summary
(package private) static java.lang.String d
           
(package private) static java.lang.String dt
           
(package private) static java.lang.String EMPTY_STR
           
(package private) static java.lang.String gd
           
(package private) static java.lang.String gm
           
(package private) static java.lang.String gmd
           
(package private) static java.lang.String gy
           
(package private) static java.lang.String gym
           
(package private) static java.lang.String t
           
 
Constructor Summary
ExsltDatetime()
           
 
Method Summary
static java.lang.String date()
          See above.
static java.lang.String date(java.lang.String datetimeIn)
          The date:date function returns the date specified in the date/time string given as the argument.
static java.lang.String dateTime()
          The date:date-time function returns the current date and time as a date/time string.
static java.lang.String dayAbbreviation()
          See above.
static java.lang.String dayAbbreviation(java.lang.String datetimeIn)
          The date:day-abbreviation function returns the abbreviation of the day of the week of a date.
static double dayInMonth()
          See above.
static double dayInMonth(java.lang.String datetimeIn)
          The date:day-in-month function returns the day of a date as a number.
static double dayInWeek()
          See above.
static double dayInWeek(java.lang.String datetimeIn)
          The date:day-in-week function returns the day of the week given in a date as a number.
static double dayInYear()
          See above.
static double dayInYear(java.lang.String datetimeIn)
          The date:day-in-year function returns the day of a date in a year as a number.
static java.lang.String dayName()
          See above.
static java.lang.String dayName(java.lang.String datetimeIn)
          The date:day-name function returns the full name of the day of the week of a date.
static double dayOfWeekInMonth()
          See above.
static double dayOfWeekInMonth(java.lang.String datetimeIn)
          The date:day-of-week-in-month function returns the day-of-the-week in a month of a date as a number (e.g.
static java.lang.String formatDate(java.lang.String dateTime, java.lang.String pattern)
          The date:format-date function formats a date/time according to a pattern.
private static java.lang.String formatDigits(int q)
          Represent the hours and minutes with two-digit strings.
private static java.lang.String[] getEraDatetimeZone(java.lang.String in)
          Returns an array with the 3 components that a datetime input string may contain: - (for BC era), datetime, and zone.
private static java.lang.String getNameOrAbbrev(java.lang.String format)
          Get the full name or abbreviation for the current month or day (no input string).
private static java.lang.String getNameOrAbbrev(java.lang.String in, java.lang.String[] formatsIn, java.lang.String formatOut)
          Get the full name or abbreviation of the month or day.
private static double getNumber(java.lang.String in, java.lang.String[] formats, int calField)
          Parse the input string and return the corresponding calendar field number.
private static int getZoneStart(java.lang.String datetime)
          Get the start of zone information if the input ends with 'Z' or +/-hh:mm.
static double hourInDay()
          See above.
static double hourInDay(java.lang.String datetimeIn)
          The date:hour-in-day function returns the hour of the day as a number.
static boolean leapYear()
          See above.
static XObject leapYear(java.lang.String datetimeIn)
          The date:leap-year function returns true if the year given in a date is a leap year.
static double minuteInHour()
          See above.
static double minuteInHour(java.lang.String datetimeIn)
          The date:minute-in-hour function returns the minute of the hour as a number.
static java.lang.String monthAbbreviation()
          See above.
static java.lang.String monthAbbreviation(java.lang.String datetimeIn)
          The date:month-abbreviation function returns the abbreviation of the month of a date.
static double monthInYear()
          See above.
static double monthInYear(java.lang.String datetimeIn)
          The date:month-in-year function returns the month of a date as a number.
static java.lang.String monthName()
          See above.
static java.lang.String monthName(java.lang.String datetimeIn)
          The date:month-name function returns the full name of the month of a date.
static double secondInMinute()
          See above.
static double secondInMinute(java.lang.String datetimeIn)
          The date:second-in-minute function returns the second of the minute as a number.
private static java.lang.String strip(java.lang.String symbols, java.lang.String pattern)
          Strips occurrences of the given character from a date format pattern.
private static java.util.Date testFormats(java.lang.String in, java.lang.String[] formats)
          Attempt to parse an input string with the allowed formats, returning null if none of the formats work.
static java.lang.String time()
          See above.
static java.lang.String time(java.lang.String timeIn)
          The date:time function returns the time specified in the date/time string given as the argument.
static double weekInYear()
          See above.
static double weekInYear(java.lang.String datetimeIn)
          The date:week-in-year function returns the week of the year as a number.
static double year()
          See above.
static double year(java.lang.String datetimeIn)
          The date:year function returns the year of a date as a number.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

dt

static final java.lang.String dt
See Also:
Constant Field Values

d

static final java.lang.String d
See Also:
Constant Field Values

gym

static final java.lang.String gym
See Also:
Constant Field Values

gy

static final java.lang.String gy
See Also:
Constant Field Values

gmd

static final java.lang.String gmd
See Also:
Constant Field Values

gm

static final java.lang.String gm
See Also:
Constant Field Values

gd

static final java.lang.String gd
See Also:
Constant Field Values

t

static final java.lang.String t
See Also:
Constant Field Values

EMPTY_STR

static final java.lang.String EMPTY_STR
See Also:
Constant Field Values
Constructor Detail

ExsltDatetime

public ExsltDatetime()
Method Detail

dateTime

public static java.lang.String dateTime()
The date:date-time function returns the current date and time as a date/time string. The date/time string that's returned must be a string in the format defined as the lexical representation of xs:dateTime in [3.2.7 dateTime] of [XML Schema Part 2: Datatypes]. The date/time format is basically CCYY-MM-DDThh:mm:ss, although implementers should consult [XML Schema Part 2: Datatypes] and [ISO 8601] for details. The date/time string format must include a time zone, either a Z to indicate Coordinated Universal Time or a + or - followed by the difference between the difference from UTC represented as hh:mm.

formatDigits

private static java.lang.String formatDigits(int q)
Represent the hours and minutes with two-digit strings.

Parameters:
q - hrs or minutes.
Returns:
two-digit String representation of hrs or minutes.

date

public static java.lang.String date(java.lang.String datetimeIn)
                             throws java.text.ParseException
The date:date function returns the date specified in the date/time string given as the argument. If no argument is given, then the current local date/time, as returned by date:date-time is used as a default argument. The date/time string that's returned must be a string in the format defined as the lexical representation of xs:dateTime in [3.2.7 dateTime] of [XML Schema Part 2: Datatypes]. If the argument is not in either of these formats, date:date returns an empty string (''). The date/time format is basically CCYY-MM-DDThh:mm:ss, although implementers should consult [XML Schema Part 2: Datatypes] and [ISO 8601] for details. The date is returned as a string with a lexical representation as defined for xs:date in [3.2.9 date] of [XML Schema Part 2: Datatypes]. The date format is basically CCYY-MM-DD, although implementers should consult [XML Schema Part 2: Datatypes] and [ISO 8601] for details. If no argument is given or the argument date/time specifies a time zone, then the date string format must include a time zone, either a Z to indicate Coordinated Universal Time or a + or - followed by the difference between the difference from UTC represented as hh:mm. If an argument is specified and it does not specify a time zone, then the date string format must not include a time zone.

Throws:
java.text.ParseException

date

public static java.lang.String date()
See above.

time

public static java.lang.String time(java.lang.String timeIn)
                             throws java.text.ParseException
The date:time function returns the time specified in the date/time string given as the argument. If no argument is given, then the current local date/time, as returned by date:date-time is used as a default argument. The date/time string that's returned must be a string in the format defined as the lexical representation of xs:dateTime in [3.2.7 dateTime] of [XML Schema Part 2: Datatypes]. If the argument string is not in this format, date:time returns an empty string (''). The date/time format is basically CCYY-MM-DDThh:mm:ss, although implementers should consult [XML Schema Part 2: Datatypes] and [ISO 8601] for details. The date is returned as a string with a lexical representation as defined for xs:time in [3.2.8 time] of [XML Schema Part 2: Datatypes]. The time format is basically hh:mm:ss, although implementers should consult [XML Schema Part 2: Datatypes] and [ISO 8601] for details. If no argument is given or the argument date/time specifies a time zone, then the time string format must include a time zone, either a Z to indicate Coordinated Universal Time or a + or - followed by the difference between the difference from UTC represented as hh:mm. If an argument is specified and it does not specify a time zone, then the time string format must not include a time zone.

Throws:
java.text.ParseException

time

public static java.lang.String time()
See above.

year

public static double year(java.lang.String datetimeIn)
                   throws java.text.ParseException
The date:year function returns the year of a date as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used as a default argument. The date/time string specified as the first argument must be a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gYearMonth (CCYY-MM) xs:gYear (CCYY) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

year

public static double year()
See above.

monthInYear

public static double monthInYear(java.lang.String datetimeIn)
                          throws java.text.ParseException
The date:month-in-year function returns the month of a date as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used as a default argument. The date/time string specified as the first argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gYearMonth (CCYY-MM) xs:gMonth (--MM--) xs:gMonthDay (--MM-DD) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

monthInYear

public static double monthInYear()
See above.

weekInYear

public static double weekInYear(java.lang.String datetimeIn)
                         throws java.text.ParseException
The date:week-in-year function returns the week of the year as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used as the default argument. For the purposes of numbering, counting follows ISO 8601: week 1 in a year is the week containing the first Thursday of the year, with new weeks beginning on a Monday. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

weekInYear

public static double weekInYear()
See above.

dayInYear

public static double dayInYear(java.lang.String datetimeIn)
                        throws java.text.ParseException
The date:day-in-year function returns the day of a date in a year as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

dayInYear

public static double dayInYear()
See above.

dayInMonth

public static double dayInMonth(java.lang.String datetimeIn)
                         throws java.text.ParseException
The date:day-in-month function returns the day of a date as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gMonthDay (--MM-DD) xs:gDay (---DD) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

dayInMonth

public static double dayInMonth()
See above.

dayOfWeekInMonth

public static double dayOfWeekInMonth(java.lang.String datetimeIn)
                               throws java.text.ParseException
The date:day-of-week-in-month function returns the day-of-the-week in a month of a date as a number (e.g. 3 for the 3rd Tuesday in May). If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

dayOfWeekInMonth

public static double dayOfWeekInMonth()
See above.

dayInWeek

public static double dayInWeek(java.lang.String datetimeIn)
                        throws java.text.ParseException
The date:day-in-week function returns the day of the week given in a date as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then NaN is returned. The numbering of days of the week starts at 1 for Sunday, 2 for Monday and so on up to 7 for Saturday.

Throws:
java.text.ParseException

dayInWeek

public static double dayInWeek()
See above.

hourInDay

public static double hourInDay(java.lang.String datetimeIn)
                        throws java.text.ParseException
The date:hour-in-day function returns the hour of the day as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:time (hh:mm:ss) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

hourInDay

public static double hourInDay()
See above.

minuteInHour

public static double minuteInHour(java.lang.String datetimeIn)
                           throws java.text.ParseException
The date:minute-in-hour function returns the minute of the hour as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:time (hh:mm:ss) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

minuteInHour

public static double minuteInHour()
See above.

secondInMinute

public static double secondInMinute(java.lang.String datetimeIn)
                             throws java.text.ParseException
The date:second-in-minute function returns the second of the minute as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:time (hh:mm:ss) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

secondInMinute

public static double secondInMinute()
See above.

leapYear

public static XObject leapYear(java.lang.String datetimeIn)
                        throws java.text.ParseException
The date:leap-year function returns true if the year given in a date is a leap year. If no argument is given, then the current local date/time, as returned by date:date-time is used as a default argument. The date/time string specified as the first argument must be a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gYearMonth (CCYY-MM) xs:gYear (CCYY) If the date/time string is not in one of these formats, then NaN is returned.

Throws:
java.text.ParseException

leapYear

public static boolean leapYear()
See above.

monthName

public static java.lang.String monthName(java.lang.String datetimeIn)
                                  throws java.text.ParseException
The date:month-name function returns the full name of the month of a date. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gYearMonth (CCYY-MM) xs:gMonth (--MM--) If the date/time string is not in one of these formats, then an empty string ('') is returned. The result is an English month name: one of 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November' or 'December'.

Throws:
java.text.ParseException

monthName

public static java.lang.String monthName()
See above.

monthAbbreviation

public static java.lang.String monthAbbreviation(java.lang.String datetimeIn)
                                          throws java.text.ParseException
The date:month-abbreviation function returns the abbreviation of the month of a date. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) xs:gYearMonth (CCYY-MM) xs:gMonth (--MM--) If the date/time string is not in one of these formats, then an empty string ('') is returned. The result is a three-letter English month abbreviation: one of 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov' or 'Dec'. An implementation of this extension function in the EXSLT date namespace must conform to the behaviour described in this document.

Throws:
java.text.ParseException

monthAbbreviation

public static java.lang.String monthAbbreviation()
See above.

dayName

public static java.lang.String dayName(java.lang.String datetimeIn)
                                throws java.text.ParseException
The date:day-name function returns the full name of the day of the week of a date. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then the empty string ('') is returned. The result is an English day name: one of 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday' or 'Friday'. An implementation of this extension function in the EXSLT date namespace must conform to the behaviour described in this document.

Throws:
java.text.ParseException

dayName

public static java.lang.String dayName()
See above.

dayAbbreviation

public static java.lang.String dayAbbreviation(java.lang.String datetimeIn)
                                        throws java.text.ParseException
The date:day-abbreviation function returns the abbreviation of the day of the week of a date. If no argument is given, then the current local date/time, as returned by date:date-time is used the default argument. The date/time string specified as the argument is a left or right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows: xs:dateTime (CCYY-MM-DDThh:mm:ss) xs:date (CCYY-MM-DD) If the date/time string is not in one of these formats, then the empty string ('') is returned. The result is a three-letter English day abbreviation: one of 'Sun', 'Mon', 'Tue', 'Wed', 'Thu' or 'Fri'. An implementation of this extension function in the EXSLT date namespace must conform to the behaviour described in this document.

Throws:
java.text.ParseException

dayAbbreviation

public static java.lang.String dayAbbreviation()
See above.

getEraDatetimeZone

private static java.lang.String[] getEraDatetimeZone(java.lang.String in)
Returns an array with the 3 components that a datetime input string may contain: - (for BC era), datetime, and zone. If the zone is not valid, return null for that component.

getZoneStart

private static int getZoneStart(java.lang.String datetime)
Get the start of zone information if the input ends with 'Z' or +/-hh:mm. If a zone string is not found, return -1; if the zone string is invalid, return -2.

testFormats

private static java.util.Date testFormats(java.lang.String in,
                                          java.lang.String[] formats)
                                   throws java.text.ParseException
Attempt to parse an input string with the allowed formats, returning null if none of the formats work.

Throws:
java.text.ParseException

getNumber

private static double getNumber(java.lang.String in,
                                java.lang.String[] formats,
                                int calField)
                         throws java.text.ParseException
Parse the input string and return the corresponding calendar field number.

Throws:
java.text.ParseException

getNameOrAbbrev

private static java.lang.String getNameOrAbbrev(java.lang.String in,
                                                java.lang.String[] formatsIn,
                                                java.lang.String formatOut)
                                         throws java.text.ParseException
Get the full name or abbreviation of the month or day.

Throws:
java.text.ParseException

getNameOrAbbrev

private static java.lang.String getNameOrAbbrev(java.lang.String format)
Get the full name or abbreviation for the current month or day (no input string).

formatDate

public static java.lang.String formatDate(java.lang.String dateTime,
                                          java.lang.String pattern)
The date:format-date function formats a date/time according to a pattern.

The first argument to date:format-date specifies the date/time to be formatted. It must be right or left-truncated date/time strings in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows:

The second argument is a string that gives the format pattern used to format the date. The format pattern must be in the syntax specified by the JDK 1.1 SimpleDateFormat class. The format pattern string is interpreted as described for the JDK 1.1 SimpleDateFormat class.

If the date/time format is right-truncated (i.e. in a format other than xs:time, or xs:dateTime) then any missing components are assumed to be as follows: if no month is specified, it is given a month of 01; if no day is specified, it is given a day of 01; if no time is specified, it is given a time of 00:00:00.

If the date/time format is left-truncated (i.e. xs:time, xs:gMonthDay, xs:gMonth or xs:gDay) and the format pattern has a token that uses a component that is missing from the date/time format used, then that token is replaced with an empty string ('') within the result. The author is Helg Bredow (helg.bredow@kalido.com)

strip

private static java.lang.String strip(java.lang.String symbols,
                                      java.lang.String pattern)
Strips occurrences of the given character from a date format pattern.

Parameters:
symbols - list of symbols to strip.
pattern -
Returns:
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