org.apache.xmlbeans

## Class GDate

- java.lang.Object
- - org.apache.xmlbeans.GDate

All Implemented Interfaces:
  Serializable, GDateSpecification

    public final class GDate
    extends Object
    implements GDateSpecification, 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

### Field Summary

### Fields inherited from interface org.apache.xmlbeans.GDateSpecification

`HAS_DAY, HAS_MONTH, HAS_TIME, HAS_TIMEZONE, HAS_YEAR`

### Constructor Summary

Constructors
Constructor and Description
`GDate(Calendar calendar)` Constructs a GDate based on a java.util.Calendar.
`GDate(CharSequence string)` Constructs a GDate based on a lexical representation.
`GDate(Date date)` Constructs a GDate based on a java.util.Date.
`GDate(GDateSpecification gdate)` Constructs a GDate based on another GDateSpecification.
`GDate(int year, int month, int day, int hour, int minute, int second, 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, 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.

### Method Summary

All Methods Instance Methods Concrete Methods
`GDate` `add(GDurationSpecification duration)` Adds a duration to this GDate, and returns a new GDate.
`String` `canonicalString()` The canonical string representation.
`int` `compareToGDate(GDateSpecification datespec)` Comparison to another GDate.
`boolean` `equals(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`.
`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.
`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.
`String` `toString()` The natural string representation.

### Methods inherited from class java.lang.Object

`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

### Constructor Detail

#### GDate

    public GDate(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,
                 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,
                 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(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(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 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 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 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.

#### getBuiltinTypeCode

    public 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.

Value will be equal to `SchemaType.BTC_NOT_BUILTIN`, `SchemaType.BTC_G_YEAR`, `SchemaType.BTC_G_YEAR_MONTH`, `SchemaType.BTC_G_MONTH`, `SchemaType.BTC_G_MONTH_DAY`, `SchemaType.BTC_G_DAY`, `SchemaType.BTC_DATE`, `SchemaType.BTC_DATE_TIME`, or `SchemaType.BTC_TIME`.

Specified by:
  `getBuiltinTypeCode` in interface `GDateSpecification`

#### add

    public GDate add(GDurationSpecification duration)

Adds a duration to this GDate, and returns a new GDate.

#### subtract

    public GDate subtract(GDurationSpecification duration)

Adds a duration to this GDate, and returns a new GDate.

#### equals

    public boolean equals(Object obj)

GDate is an immutable class, and equality is computed based on its canonical value.

Overrides:
  `equals` in class `Object`

#### hashCode

    public int hashCode()

Returns a hash code for this GDate.

Overrides:
  `hashCode` in class `Object`

#### toString

    public 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 `Object`