/* ******************************************************************************* * Copyright (C) 2007-2008, International Business Machines Corporation and * * others. All Rights Reserved. * ******************************************************************************* */ #ifndef RBTZ_H #define RBTZ_H #include "unicode/utypes.h" /** * \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 TimeZone* clone(void) 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; /** * 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; /** * 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; 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 // RBTZ_H //eof