Class GDate

  • All Implemented Interfaces:
    java.io.Serializable, GDateSpecification

    public final class GDate
    extends java.lang.Object
    implements GDateSpecification, java.io.Serializable
    Represents an XML Schema-compatible Gregorian date.

    There are many date types in XML Schema, and this type represents the natural union of all those types. A GDate can hold any subset of date fields (Year, Month, Day, Time, Timezone, or some combination). Wherever the specification provides guidance, the guidelines in the XML Schema 1.0 specification (plus published errata) are followed.

    Instances may separately have values or no values for the year, month, day-of-month, and time-of-day. Not all operations are meaningful on all combinations.

    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor Description
      GDate​(int year, int month, int day, int hour, int minute, int second, java.math.BigDecimal fraction)
      Constructs a GDate with the specified year, month, day, hours, minutes, seconds, and optional fractional seconds, in an unspecified timezone.
      GDate​(int year, int month, int day, int hour, int minute, int second, java.math.BigDecimal fraction, int tzSign, int tzHour, int tzMinute)
      Constructs an absolute GDate with the specified year, month, day, hours, minutes, seconds, and optional fractional seconds, and in the timezone specified.
      GDate​(java.lang.CharSequence string)
      Constructs a GDate based on a lexical representation.
      GDate​(java.util.Calendar calendar)
      Constructs a GDate based on a java.util.Calendar.
      GDate​(java.util.Date date)
      Constructs a GDate based on a java.util.Date.
      GDate​(GDateSpecification gdate)
      Constructs a GDate based on another GDateSpecification.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      GDate add​(GDurationSpecification duration)
      Adds a duration to this GDate, and returns a new GDate.
      java.lang.String canonicalString()
      The canonical string representation.
      int compareToGDate​(GDateSpecification datespec)
      Comparison to another GDate.
      boolean equals​(java.lang.Object obj)
      GDate is an immutable class, and equality is computed based on its canonical value.
      int getBuiltinTypeCode()
      Returns the builtin type code for the shape of the information contained in this instance, or 0 if the instance doesn't contain information corresponding to a Schema type.
      XmlCalendar getCalendar()
      Retrieves the value of the current time as an XmlCalendar.
      java.util.Date getDate()
      Retrieves the value of the current time as a java.util.Date instance.
      int getDay()
      Gets the day-of-month.
      int getFlags()
      Returns a combination of flags indicating the information contained by this GDate.
      java.math.BigDecimal getFraction()
      Gets the fraction-of-second.
      int getHour()
      Gets the hour-of-day.
      int getJulianDate()
      Returns the Julian date corresponding to this Gregorian date.
      int getMillisecond()
      Gets the rounded millisecond value.
      int getMinute()
      Gets the minute-of-hour.
      int getMonth()
      Gets the month-of-year.
      int getSecond()
      Gets the second-of-minute.
      int getTimeZoneHour()
      Gets the time zone hour.
      int getTimeZoneMinute()
      Gets the time zone minutes.
      int getTimeZoneSign()
      Gets the time zone sign.
      int getYear()
      Gets the year.
      boolean hasDate()
      True if this date/time specification specifies a full date (year, month, day)
      boolean hasDay()
      True if this date/time specification specifies a day-of-month.
      int hashCode()
      Returns a hash code for this GDate.
      boolean hasMonth()
      True if this date/time specification specifies a month-of-year.
      boolean hasTime()
      True if this date/time specification specifies a time-of-day.
      boolean hasTimeZone()
      True if this date/time specification specifies a timezone.
      boolean hasYear()
      True if this date/time specification specifies a year.
      boolean isImmutable()
      Returns true: all GDate instances are immutable.
      boolean isValid()
      True if this GDate corresponds to a valid gregorian date value in XML schema.
      GDate subtract​(GDurationSpecification duration)
      Adds a duration to this GDate, and returns a new GDate.
      java.lang.String toString()
      The natural string representation.
      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait
    • Constructor Detail

      • GDate

        public GDate​(java.lang.CharSequence string)
        Constructs a GDate based on a lexical representation.
      • GDate

        public GDate​(int year,
                     int month,
                     int day,
                     int hour,
                     int minute,
                     int second,
                     java.math.BigDecimal fraction)
        Constructs a GDate with the specified year, month, day, hours, minutes, seconds, and optional fractional seconds, in an unspecified timezone.

        Note that by not specifying the timezone the GDate becomes partially unordered with respect to times that do have a specified timezone.

      • GDate

        public GDate​(int year,
                     int month,
                     int day,
                     int hour,
                     int minute,
                     int second,
                     java.math.BigDecimal fraction,
                     int tzSign,
                     int tzHour,
                     int tzMinute)
        Constructs an absolute GDate with the specified year, month, day, hours, minutes, seconds, and optional fractional seconds, and in the timezone specified.

        If you wish to have a time or date that isn't in a specified timezone, then use the constructor that does not include the timezone arguments.

      • GDate

        public GDate​(java.util.Date date)
        Constructs a GDate based on a java.util.Date.

        The current offset of the default timezone is used as the timezone.

        For example, if eastern daylight time is in effect at the given date, the timezone on the east coast of the united states translates to GMT-05:00 (EST) + 1:00 (DT offset) == GMT-04:00.

      • GDate

        public GDate​(java.util.Calendar calendar)
        Constructs a GDate based on a java.util.Calendar.

        If the calendar does not have some fields set, the same absence of information is reflected in the GDate. Note that java.util.GregorianCalendar fills in all fields as soon as any are fetched, so constructing a GDate with the same calendar object twice may result in a different GDate because of a changed calendar. Note that org.apache.xmlbeans.XmlCalendar is stable if you re-get a set field, so it does not have the same problem.

      • GDate

        public GDate​(GDateSpecification gdate)
        Constructs a GDate based on another GDateSpecification.
    • Method Detail

      • isImmutable

        public final boolean isImmutable()
        Returns true: all GDate instances are immutable.
        Specified by:
        isImmutable in interface GDateSpecification
      • getFlags

        public int getFlags()
        Returns a combination of flags indicating the information contained by this GDate. The five flags are HAS_TIMEZONE, HAS_YEAR, HAS_MONTH, HAS_DAY, and HAS_TIME.
        Specified by:
        getFlags in interface GDateSpecification
      • hasTimeZone

        public final boolean hasTimeZone()
        True if this date/time specification specifies a timezone.
        Specified by:
        hasTimeZone in interface GDateSpecification
      • hasYear

        public final boolean hasYear()
        True if this date/time specification specifies a year.
        Specified by:
        hasYear in interface GDateSpecification
      • hasMonth

        public final boolean hasMonth()
        True if this date/time specification specifies a month-of-year.
        Specified by:
        hasMonth in interface GDateSpecification
      • hasDay

        public final boolean hasDay()
        True if this date/time specification specifies a day-of-month.
        Specified by:
        hasDay in interface GDateSpecification
      • hasTime

        public final boolean hasTime()
        True if this date/time specification specifies a time-of-day.
        Specified by:
        hasTime in interface GDateSpecification
      • hasDate

        public final boolean hasDate()
        True if this date/time specification specifies a full date (year, month, day)
        Specified by:
        hasDate in interface GDateSpecification
      • getYear

        public final int getYear()
        Gets the year. Should be a four-digit year specification.
        Specified by:
        getYear in interface GDateSpecification
      • getMonth

        public final int getMonth()
        Gets the month-of-year. January is 1.
        Specified by:
        getMonth in interface GDateSpecification
      • getDay

        public final int getDay()
        Gets the day-of-month. The first day of each month is 1.
        Specified by:
        getDay in interface GDateSpecification
      • getHour

        public final int getHour()
        Gets the hour-of-day. Midnight is 0, and 11PM is 23.
        Specified by:
        getHour in interface GDateSpecification
      • getMinute

        public final int getMinute()
        Gets the minute-of-hour. Range from 0 to 59.
        Specified by:
        getMinute in interface GDateSpecification
      • getSecond

        public final int getSecond()
        Gets the second-of-minute. Range from 0 to 59.
        Specified by:
        getSecond in interface GDateSpecification
      • getFraction

        public final java.math.BigDecimal getFraction()
        Gets the fraction-of-second. Range from 0 (inclusive) to 1 (exclusive).
        Specified by:
        getFraction in interface GDateSpecification
      • getTimeZoneSign

        public final int getTimeZoneSign()
        Gets the time zone sign. For time zones east of GMT, this is positive; for time zones west, this is negative.
        Specified by:
        getTimeZoneSign in interface GDateSpecification
      • getTimeZoneHour

        public final int getTimeZoneHour()
        Gets the time zone hour. This is always positive: for the sign, look at getTimeZoneSign().
        Specified by:
        getTimeZoneHour in interface GDateSpecification
      • getTimeZoneMinute

        public final int getTimeZoneMinute()
        Gets the time zone minutes. This is always positive: for the sign, look at getTimeZoneSign().
        Specified by:
        getTimeZoneMinute in interface GDateSpecification
      • getMillisecond

        public int getMillisecond()
        Gets the rounded millisecond value. Range from 0 to 999
        Specified by:
        getMillisecond in interface GDateSpecification
      • canonicalString

        public java.lang.String canonicalString()
        The canonical string representation. Specific moments or times-of-day in a specified timezone are normalized to UTC time to produce a canonical string form for them. Other recurring time specifications keep their timezone information.
        Specified by:
        canonicalString in interface GDateSpecification
      • isValid

        public boolean isValid()
        True if this GDate corresponds to a valid gregorian date value in XML schema.
        Specified by:
        isValid in interface GDateSpecification
      • getJulianDate

        public int getJulianDate()
        Returns the Julian date corresponding to this Gregorian date. The Julian date (JD) is a continuous count of days from 1 January 4713 BC.
        Specified by:
        getJulianDate in interface GDateSpecification
      • getCalendar

        public XmlCalendar getCalendar()
        Retrieves the value of the current time as an XmlCalendar.

        XmlCalendar is a subclass of GregorianCalendar which is slightly customized to match XML schema date rules.

        The returned XmlCalendar has only those time and date fields set that are reflected in the GDate object. Because of the way the Calendar contract works, any information in the isSet() vanishes as soon as you view any unset field using get() methods. This means that if it is important to understand which date fields are set, you must call isSet() first before get().

        Specified by:
        getCalendar in interface GDateSpecification
      • getDate

        public java.util.Date getDate()
        Retrieves the value of the current time as a java.util.Date instance.
        Specified by:
        getDate in interface GDateSpecification
      • compareToGDate

        public int compareToGDate​(GDateSpecification datespec)
        Comparison to another GDate.
        • Returns -1 if this < date. (less-than)
        • Returns 0 if this == date. (equal)
        • Returns 1 if this > date. (greater-than)
        • Returns 2 if this <> date. (incomparable)
        Two instances are incomparable if they have different amounts of information.
        Specified by:
        compareToGDate in interface GDateSpecification
        Parameters:
        datespec - the date to compare against.
      • equals

        public boolean equals​(java.lang.Object obj)
        GDate is an immutable class, and equality is computed based on its canonical value.
        Overrides:
        equals in class java.lang.Object
      • hashCode

        public int hashCode()
        Returns a hash code for this GDate.
        Overrides:
        hashCode in class java.lang.Object
      • toString

        public java.lang.String toString()
        The natural string representation. This represents the information that is available, including timezone. For types that correspond to defined schema types (schemaBuiltinTypeCode() > 0), this provides the natural lexical representation.

        When both time and timezone are specified, this string is not the canonical representation unless the timezone is UTC (Z) (since the same moment in time can be expressed in different timezones). To get a canonical string, use the canonicalString() method.

        Specified by:
        toString in interface GDateSpecification
        Overrides:
        toString in class java.lang.Object