| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************* |
| * Copyright (C) 2007-2013, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| #ifndef RBTZ_H |
| #define RBTZ_H |
| |
| #include "unicode/utypes.h" |
| |
| #if U_SHOW_CPLUSPLUS_API |
| |
| /** |
| * \file |
| * \brief C++ API: Rule based customizable time zone |
| */ |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/basictz.h" |
| #include "unicode/unistr.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| // forward declaration |
| class UVector; |
| struct Transition; |
| |
| /** |
| * a BasicTimeZone subclass implemented in terms of InitialTimeZoneRule and TimeZoneRule instances |
| * @see BasicTimeZone |
| * @see InitialTimeZoneRule |
| * @see TimeZoneRule |
| */ |
| class U_I18N_API RuleBasedTimeZone : public BasicTimeZone { |
| public: |
| /** |
| * Constructs a <code>RuleBasedTimeZone</code> object with the ID and the |
| * <code>InitialTimeZoneRule</code>. The input <code>InitialTimeZoneRule</code> |
| * is adopted by this <code>RuleBasedTimeZone</code>, thus the caller must not |
| * delete it. |
| * @param id The time zone ID. |
| * @param initialRule The initial time zone rule. |
| * @stable ICU 3.8 |
| */ |
| RuleBasedTimeZone(const UnicodeString& id, InitialTimeZoneRule* initialRule); |
| |
| /** |
| * Copy constructor. |
| * @param source The RuleBasedTimeZone object to be copied. |
| * @stable ICU 3.8 |
| */ |
| RuleBasedTimeZone(const RuleBasedTimeZone& source); |
| |
| /** |
| * Destructor. |
| * @stable ICU 3.8 |
| */ |
| virtual ~RuleBasedTimeZone(); |
| |
| /** |
| * Assignment operator. |
| * @param right The object to be copied. |
| * @stable ICU 3.8 |
| */ |
| RuleBasedTimeZone& operator=(const RuleBasedTimeZone& right); |
| |
| /** |
| * Return true if the given <code>TimeZone</code> objects are |
| * semantically equal. Objects of different subclasses are considered unequal. |
| * @param that The object to be compared with. |
| * @return true if the given <code>TimeZone</code> objects are |
| *semantically equal. |
| * @stable ICU 3.8 |
| */ |
| virtual UBool operator==(const TimeZone& that) const; |
| |
| /** |
| * Return true if the given <code>TimeZone</code> objects are |
| * semantically unequal. Objects of different subclasses are considered unequal. |
| * @param that The object to be compared with. |
| * @return true if the given <code>TimeZone</code> objects are |
| * semantically unequal. |
| * @stable ICU 3.8 |
| */ |
| virtual UBool operator!=(const TimeZone& that) const; |
| |
| /** |
| * Adds the <code>TimeZoneRule</code> which represents time transitions. |
| * The <code>TimeZoneRule</code> must have start times, that is, the result |
| * of isTransitionRule() must be true. Otherwise, U_ILLEGAL_ARGUMENT_ERROR |
| * is set to the error code. |
| * The input <code>TimeZoneRule</code> is adopted by this |
| * <code>RuleBasedTimeZone</code> on successful completion of this method, |
| * thus, the caller must not delete it when no error is returned. |
| * After all rules are added, the caller must call complete() method to |
| * make this <code>RuleBasedTimeZone</code> ready to handle common time |
| * zone functions. |
| * @param rule The <code>TimeZoneRule</code>. |
| * @param status Output param to filled in with a success or an error. |
| * @stable ICU 3.8 |
| */ |
| void addTransitionRule(TimeZoneRule* rule, UErrorCode& status); |
| |
| /** |
| * Makes the <code>TimeZoneRule</code> ready to handle actual timezone |
| * calcuation APIs. This method collects time zone rules specified |
| * by the caller via the constructor and addTransitionRule() and |
| * builds internal structure for making the object ready to support |
| * time zone APIs such as getOffset(), getNextTransition() and others. |
| * @param status Output param to filled in with a success or an error. |
| * @stable ICU 3.8 |
| */ |
| void complete(UErrorCode& status); |
| |
| /** |
| * Clones TimeZone objects polymorphically. Clients are responsible for deleting |
| * the TimeZone object cloned. |
| * |
| * @return A new copy of this TimeZone object. |
| * @stable ICU 3.8 |
| */ |
| virtual RuleBasedTimeZone* clone() const; |
| |
| /** |
| * Returns the TimeZone's adjusted GMT offset (i.e., the number of milliseconds to add |
| * to GMT to get local time in this time zone, taking daylight savings time into |
| * account) as of a particular reference date. The reference date is used to determine |
| * whether daylight savings time is in effect and needs to be figured into the offset |
| * that is returned (in other words, what is the adjusted GMT offset in this time zone |
| * at this particular date and time?). For the time zones produced by createTimeZone(), |
| * the reference data is specified according to the Gregorian calendar, and the date |
| * and time fields are local standard time. |
| * |
| * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload, |
| * which returns both the raw and the DST offset for a given time. This method |
| * is retained only for backward compatibility. |
| * |
| * @param era The reference date's era |
| * @param year The reference date's year |
| * @param month The reference date's month (0-based; 0 is January) |
| * @param day The reference date's day-in-month (1-based) |
| * @param dayOfWeek The reference date's day-of-week (1-based; 1 is Sunday) |
| * @param millis The reference date's milliseconds in day, local standard time |
| * @param status Output param to filled in with a success or an error. |
| * @return The offset in milliseconds to add to GMT to get local time. |
| * @stable ICU 3.8 |
| */ |
| virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, |
| uint8_t dayOfWeek, int32_t millis, UErrorCode& status) const; |
| |
| /** |
| * Gets the time zone offset, for current date, modified in case of |
| * daylight savings. This is the offset to add *to* UTC to get local time. |
| * |
| * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload, |
| * which returns both the raw and the DST offset for a given time. This method |
| * is retained only for backward compatibility. |
| * |
| * @param era The reference date's era |
| * @param year The reference date's year |
| * @param month The reference date's month (0-based; 0 is January) |
| * @param day The reference date's day-in-month (1-based) |
| * @param dayOfWeek The reference date's day-of-week (1-based; 1 is Sunday) |
| * @param millis The reference date's milliseconds in day, local standard time |
| * @param monthLength The length of the given month in days. |
| * @param status Output param to filled in with a success or an error. |
| * @return The offset in milliseconds to add to GMT to get local time. |
| * @stable ICU 3.8 |
| */ |
| virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, |
| uint8_t dayOfWeek, int32_t millis, |
| int32_t monthLength, UErrorCode& status) const; |
| |
| /** |
| * Returns the time zone raw and GMT offset for the given moment |
| * in time. Upon return, local-millis = GMT-millis + rawOffset + |
| * dstOffset. All computations are performed in the proleptic |
| * Gregorian calendar. The default implementation in the TimeZone |
| * class delegates to the 8-argument getOffset(). |
| * |
| * @param date moment in time for which to return offsets, in |
| * units of milliseconds from January 1, 1970 0:00 GMT, either GMT |
| * time or local wall time, depending on `local'. |
| * @param local if true, `date' is local wall time; otherwise it |
| * is in GMT time. |
| * @param rawOffset output parameter to receive the raw offset, that |
| * is, the offset not including DST adjustments |
| * @param dstOffset output parameter to receive the DST offset, |
| * that is, the offset to be added to `rawOffset' to obtain the |
| * total offset between local and GMT time. If DST is not in |
| * effect, this value is zero; otherwise it is a positive value, |
| * typically one hour. |
| * @param ec input-output error code |
| * @stable ICU 3.8 |
| */ |
| virtual void getOffset(UDate date, UBool local, int32_t& rawOffset, |
| int32_t& dstOffset, UErrorCode& ec) const; |
| |
| /** |
| * Sets the TimeZone's raw GMT offset (i.e., the number of milliseconds to add |
| * to GMT to get local time, before taking daylight savings time into account). |
| * |
| * @param offsetMillis The new raw GMT offset for this time zone. |
| * @stable ICU 3.8 |
| */ |
| virtual void setRawOffset(int32_t offsetMillis); |
| |
| /** |
| * Returns the TimeZone's raw GMT offset (i.e., the number of milliseconds to add |
| * to GMT to get local time, before taking daylight savings time into account). |
| * |
| * @return The TimeZone's raw GMT offset. |
| * @stable ICU 3.8 |
| */ |
| virtual int32_t getRawOffset(void) const; |
| |
| /** |
| * Queries if this time zone uses daylight savings time. |
| * @return true if this time zone uses daylight savings time, |
| * false, otherwise. |
| * @stable ICU 3.8 |
| */ |
| virtual UBool useDaylightTime(void) const; |
| |
| #ifndef U_FORCE_HIDE_DEPRECATED_API |
| /** |
| * Queries if the given date is in daylight savings time in |
| * this time zone. |
| * This method is wasteful since it creates a new GregorianCalendar and |
| * deletes it each time it is called. This is a deprecated method |
| * and provided only for Java compatibility. |
| * |
| * @param date the given UDate. |
| * @param status Output param filled in with success/error code. |
| * @return true if the given date is in daylight savings time, |
| * false, otherwise. |
| * @deprecated ICU 2.4. Use Calendar::inDaylightTime() instead. |
| */ |
| virtual UBool inDaylightTime(UDate date, UErrorCode& status) const; |
| #endif // U_FORCE_HIDE_DEPRECATED_API |
| |
| /** |
| * Returns true if this zone has the same rule and offset as another zone. |
| * That is, if this zone differs only in ID, if at all. |
| * @param other the <code>TimeZone</code> object to be compared with |
| * @return true if the given zone is the same as this one, |
| * with the possible exception of the ID |
| * @stable ICU 3.8 |
| */ |
| virtual UBool hasSameRules(const TimeZone& other) const; |
| |
| /** |
| * Gets the first time zone transition after the base time. |
| * @param base The base time. |
| * @param inclusive Whether the base time is inclusive or not. |
| * @param result Receives the first transition after the base time. |
| * @return true if the transition is found. |
| * @stable ICU 3.8 |
| */ |
| virtual UBool getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const; |
| |
| /** |
| * Gets the most recent time zone transition before the base time. |
| * @param base The base time. |
| * @param inclusive Whether the base time is inclusive or not. |
| * @param result Receives the most recent transition before the base time. |
| * @return true if the transition is found. |
| * @stable ICU 3.8 |
| */ |
| virtual UBool getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const; |
| |
| /** |
| * Returns the number of <code>TimeZoneRule</code>s which represents time transitions, |
| * for this time zone, that is, all <code>TimeZoneRule</code>s for this time zone except |
| * <code>InitialTimeZoneRule</code>. The return value range is 0 or any positive value. |
| * @param status Receives error status code. |
| * @return The number of <code>TimeZoneRule</code>s representing time transitions. |
| * @stable ICU 3.8 |
| */ |
| virtual int32_t countTransitionRules(UErrorCode& status) const; |
| |
| /** |
| * Gets the <code>InitialTimeZoneRule</code> and the set of <code>TimeZoneRule</code> |
| * which represent time transitions for this time zone. On successful return, |
| * the argument initial points to non-NULL <code>InitialTimeZoneRule</code> and |
| * the array trsrules is filled with 0 or multiple <code>TimeZoneRule</code> |
| * instances up to the size specified by trscount. The results are referencing the |
| * rule instance held by this time zone instance. Therefore, after this time zone |
| * is destructed, they are no longer available. |
| * @param initial Receives the initial timezone rule |
| * @param trsrules Receives the timezone transition rules |
| * @param trscount On input, specify the size of the array 'transitions' receiving |
| * the timezone transition rules. On output, actual number of |
| * rules filled in the array will be set. |
| * @param status Receives error status code. |
| * @stable ICU 3.8 |
| */ |
| virtual void getTimeZoneRules(const InitialTimeZoneRule*& initial, |
| const TimeZoneRule* trsrules[], int32_t& trscount, UErrorCode& status) const; |
| |
| /** |
| * Get time zone offsets from local wall time. |
| * @internal |
| */ |
| virtual void getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt, |
| int32_t& rawOffset, int32_t& dstOffset, UErrorCode& status) const; |
| |
| private: |
| void deleteRules(void); |
| void deleteTransitions(void); |
| UVector* copyRules(UVector* source); |
| TimeZoneRule* findRuleInFinal(UDate date, UBool local, |
| int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const; |
| UBool findNext(UDate base, UBool inclusive, UDate& time, TimeZoneRule*& from, TimeZoneRule*& to) const; |
| UBool findPrev(UDate base, UBool inclusive, UDate& time, TimeZoneRule*& from, TimeZoneRule*& to) const; |
| int32_t getLocalDelta(int32_t rawBefore, int32_t dstBefore, int32_t rawAfter, int32_t dstAfter, |
| int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const; |
| UDate getTransitionTime(Transition* transition, UBool local, |
| int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const; |
| void getOffsetInternal(UDate date, UBool local, int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt, |
| int32_t& rawOffset, int32_t& dstOffset, UErrorCode& ec) const; |
| void completeConst(UErrorCode &status) const; |
| |
| InitialTimeZoneRule *fInitialRule; |
| UVector *fHistoricRules; |
| UVector *fFinalRules; |
| UVector *fHistoricTransitions; |
| UBool fUpToDate; |
| |
| public: |
| /** |
| * Return the class ID for this class. This is useful only for comparing to |
| * a return value from getDynamicClassID(). For example: |
| * <pre> |
| * . Base* polymorphic_pointer = createPolymorphicObject(); |
| * . if (polymorphic_pointer->getDynamicClassID() == |
| * . erived::getStaticClassID()) ... |
| * </pre> |
| * @return The class ID for all objects of this class. |
| * @stable ICU 3.8 |
| */ |
| static UClassID U_EXPORT2 getStaticClassID(void); |
| |
| /** |
| * 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. |
| * @stable ICU 3.8 |
| */ |
| virtual UClassID getDynamicClassID(void) const; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif /* #if !UCONFIG_NO_FORMATTING */ |
| |
| #endif /* U_SHOW_CPLUSPLUS_API */ |
| |
| #endif // RBTZ_H |
| |
| //eof |
