+ * BuddhistCalendar is a subclass of GregorianCalendar
+ * that numbers years since the birth of the Buddha. This is the civil calendar
+ * in some predominantly Buddhist countries such as Thailand, and it is used for
+ * religious purposes elsewhere.
+ *
+ * The Buddhist calendar is identical to the Gregorian calendar in all respects + * except for the year and era. Years are numbered since the birth of the + * Buddha in 543 BC (Gregorian), so that 1 AD (Gregorian) is equivalent to 544 + * BE (Buddhist Era) and 1998 AD is 2541 BE. + *
+ * The Buddhist Calendar has only one allowable era: BE. If the
+ * calendar is not in lenient mode (see setLenient), dates before
+ * 1/1/1 BE are rejected as an illegal argument.
+ *
+ * @internal
+ */
+class BuddhistCalendar : public GregorianCalendar {
+public:
+
+ /**
+ * Useful constants for BuddhistCalendar. Only one Era.
+ * @internal
+ */
+ enum EEras {
+ BE
+ };
+
+ /**
+ * Constructs a BuddhistCalendar based on the current time in the default time zone
+ * with the given locale.
+ *
+ * @param aLocale The given locale.
+ * @param success Indicates the status of BuddhistCalendar object construction.
+ * Returns U_ZERO_ERROR if constructed successfully.
+ * @internal
+ */
+ BuddhistCalendar(const Locale& aLocale, UErrorCode& success);
+
+
+ /**
+ * Destructor
+ * @internal
+ */
+ virtual ~BuddhistCalendar();
+
+ /**
+ * Copy constructor
+ * @param source the object to be copied.
+ * @internal
+ */
+ BuddhistCalendar(const BuddhistCalendar& source);
+
+ /**
+ * Default assignment operator
+ * @param right the object to be copied.
+ * @internal
+ */
+ BuddhistCalendar& operator=(const BuddhistCalendar& right);
+
+ /**
+ * Create and return a polymorphic copy of this calendar.
+ * @return return a polymorphic copy of this calendar.
+ * @internal
+ */
+ virtual Calendar* clone(void) const;
+
+public:
+ /**
+ * Override Calendar Returns a unique class ID POLYMORPHICALLY. Pure virtual
+ * override. This method is to implement a simple version of RTTI, since not all C++
+ * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call
+ * this method.
+ *
+ * @return The class ID for this object. All objects of a given class have the
+ * same class ID. Objects of other classes have different class IDs.
+ * @internal
+ */
+ virtual UClassID getDynamicClassID(void) const;
+
+ /**
+ * Return the class ID for this class. This is useful only for comparing to a return
+ * value from getDynamicClassID(). For example:
+ *
+ * Base* polymorphic_pointer = createPolymorphicObject();
+ * if (polymorphic_pointer->getDynamicClassID() ==
+ * Derived::getStaticClassID()) ...
+ *
+ * @return The class ID for all objects of this class.
+ * @internal
+ */
+ U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void);
+
+ /**
+ * return the calendar type, "buddhist".
+ *
+ * @return calendar type
+ * @internal
+ */
+ virtual const char * getType() const;
+
+private:
+ BuddhistCalendar(); // default constructor not implemented
+
+ protected:
+ /**
+ * Return the extended year defined by the current fields. This will
+ * use the UCAL_EXTENDED_YEAR field or the UCAL_YEAR and supra-year fields (such
+ * as UCAL_ERA) specific to the calendar system, depending on which set of
+ * fields is newer.
+ * @return the extended year
+ * @internal
+ */
+ virtual int32_t handleGetExtendedYear();
+ /**
+ * Subclasses may override this method to compute several fields
+ * specific to each calendar system.
+ * @internal
+ */
+ virtual void handleComputeFields(int32_t julianDay, UErrorCode& status);
+ /**
+ * Subclass API for defining limits of different types.
+ * @param field one of the field numbers
+ * @param limitType one of MINIMUM, GREATEST_MINIMUM,
+ * LEAST_MAXIMUM, or MAXIMUM
+ * @internal
+ */
+ virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const;
+ /**
+ * Return the Julian day number of day before the first day of the
+ * given month in the given extended year. Subclasses should override
+ * this method to implement their calendar system.
+ * @param eyear the extended year
+ * @param month the zero-based month, or 0 if useMonth is false
+ * @param useMonth if false, compute the day before the first day of
+ * the given year, otherwise, compute the day before the first day of
+ * the given month
+ * @param return the Julian day number of the day before the first
+ * day of the given month and year
+ * @internal
+ */
+ virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month,
+ UBool useMonth) const;
+
+ /**
+ * Returns TRUE because the Buddhist Calendar does have a default century
+ * @internal
+ */
+ virtual UBool haveDefaultCentury() const;
+
+ /**
+ * Returns the date of the start of the default century
+ * @return start of century - in milliseconds since epoch, 1970
+ * @internal
+ */
+ virtual UDate defaultCenturyStart() const;
+
+ /**
+ * Returns the year in which the default century begins
+ * @internal
+ */
+ virtual int32_t defaultCenturyStartYear() const;
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif // _GREGOCAL
+//eof
+