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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4  ********************************************************************************
5  * Copyright (C) 2003-2013, International Business Machines Corporation
6  * and others. All Rights Reserved.
7  ********************************************************************************
8  *
9  * File BUDDHCAL.H
10  *
11  * Modification History:
12  *
13  *   Date        Name        Description
14  *   05/13/2003  srl          copied from gregocal.h
15  *   06/29/2007  srl          copied from buddhcal.h
16  ********************************************************************************
17  */
18 
19 #ifndef TAIWNCAL_H
20 #define TAIWNCAL_H
21 
22 #include "unicode/utypes.h"
23 
24 #if !UCONFIG_NO_FORMATTING
25 
26 #include "unicode/calendar.h"
27 #include "unicode/gregocal.h"
28 
29 U_NAMESPACE_BEGIN
30 
31 /**
32  * Concrete class which provides the Taiwan calendar.
33  * <P>
34  * <code>TaiwanCalendar</code> is a subclass of <code>GregorianCalendar</code>
35  * that numbers years since 1912
36  * <p>
37  * The Taiwan calendar is identical to the Gregorian calendar in all respects
38  * except for the year and era.  Years are numbered since 1912 AD (Gregorian),
39  * so that 1912 AD (Gregorian) is equivalent to 1 MINGUO (Minguo Era) and 1998 AD is 87 MINGUO.
40  * <p>
41  * The Taiwan Calendar has two eras: <code>BEFORE_MINGUO</code> and <code>MINGUO</code>.
42  * <p>
43  * @internal
44  */
45 class TaiwanCalendar : public GregorianCalendar {
46 public:
47 
48     /**
49      * Useful constants for TaiwanCalendar.  Only one Era.
50      * @internal
51      */
52     enum EEras {
53        BEFORE_MINGUO = 0,
54        MINGUO  = 1
55     };
56 
57     /**
58      * Constructs a TaiwanCalendar based on the current time in the default time zone
59      * with the given locale.
60      *
61      * @param aLocale  The given locale.
62      * @param success  Indicates the status of TaiwanCalendar object construction.
63      *                 Returns U_ZERO_ERROR if constructed successfully.
64      * @internal
65      */
66     TaiwanCalendar(const Locale& aLocale, UErrorCode& success);
67 
68 
69     /**
70      * Destructor
71      * @internal
72      */
73     virtual ~TaiwanCalendar();
74 
75     /**
76      * Copy constructor
77      * @param source    the object to be copied.
78      * @internal
79      */
80     TaiwanCalendar(const TaiwanCalendar& source);
81 
82     /**
83      * Default assignment operator
84      * @param right    the object to be copied.
85      * @internal
86      */
87     TaiwanCalendar& operator=(const TaiwanCalendar& right);
88 
89     /**
90      * Create and return a polymorphic copy of this calendar.
91      * @return    return a polymorphic copy of this calendar.
92      * @internal
93      */
94     virtual Calendar* clone(void) const;
95 
96 public:
97     /**
98      * Override Calendar Returns a unique class ID POLYMORPHICALLY. Pure virtual
99      * override. This method is to implement a simple version of RTTI, since not all C++
100      * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call
101      * this method.
102      *
103      * @return   The class ID for this object. All objects of a given class have the
104      *           same class ID. Objects of other classes have different class IDs.
105      * @internal
106      */
107     virtual UClassID getDynamicClassID(void) const;
108 
109     /**
110      * Return the class ID for this class. This is useful only for comparing to a return
111      * value from getDynamicClassID(). For example:
112      *
113      *      Base* polymorphic_pointer = createPolymorphicObject();
114      *      if (polymorphic_pointer->getDynamicClassID() ==
115      *          Derived::getStaticClassID()) ...
116      *
117      * @return   The class ID for all objects of this class.
118      * @internal
119      */
120     U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void);
121 
122     /**
123      * return the calendar type, "Taiwan".
124      *
125      * @return calendar type
126      * @internal
127      */
128     virtual const char * getType() const;
129 
130 private:
131     TaiwanCalendar(); // default constructor not implemented
132 
133  protected:
134      /**
135      * Return the extended year defined by the current fields.  This will
136      * use the UCAL_EXTENDED_YEAR field or the UCAL_YEAR and supra-year fields (such
137      * as UCAL_ERA) specific to the calendar system, depending on which set of
138      * fields is newer.
139      * @return the extended year
140      * @internal
141      */
142     virtual int32_t handleGetExtendedYear();
143     /**
144      * Subclasses may override this method to compute several fields
145      * specific to each calendar system.
146      * @internal
147      */
148     virtual void handleComputeFields(int32_t julianDay, UErrorCode& status);
149     /**
150      * Subclass API for defining limits of different types.
151      * @param field one of the field numbers
152      * @param limitType one of <code>MINIMUM</code>, <code>GREATEST_MINIMUM</code>,
153      * <code>LEAST_MAXIMUM</code>, or <code>MAXIMUM</code>
154      * @internal
155      */
156     virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const;
157 
158     /**
159      * Returns TRUE because the Taiwan Calendar does have a default century
160      * @internal
161      */
162     virtual UBool haveDefaultCentury() const;
163 
164     /**
165      * Returns the date of the start of the default century
166      * @return start of century - in milliseconds since epoch, 1970
167      * @internal
168      */
169     virtual UDate defaultCenturyStart() const;
170 
171     /**
172      * Returns the year in which the default century begins
173      * @internal
174      */
175     virtual int32_t defaultCenturyStartYear() const;
176 };
177 
178 U_NAMESPACE_END
179 
180 #endif /* #if !UCONFIG_NO_FORMATTING */
181 
182 #endif // _TAIWNCAL
183 //eof
184 
185