/usr/include/unicode/dtptngen.h (17303B)
The main method people will use is getBestPattern(String skeleton), * since normally this class is pre-built with data from a particular locale. * However, generators can be built directly from other data as well. *
Issue: may be useful to also have a function that returns the list of * fields in a pattern, in order, since we have that internally. * That would be useful for getting the UI order of field elements. * @stable ICU 3.8 **/ class U_I18N_API DateTimePatternGenerator : public UObject { public: /** * Construct a flexible generator according to default locale. * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @stable ICU 3.8 */ static DateTimePatternGenerator* U_EXPORT2 createInstance(UErrorCode& status); /** * Construct a flexible generator according to data for a given locale. * @param uLocale * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @stable ICU 3.8 */ static DateTimePatternGenerator* U_EXPORT2 createInstance(const Locale& uLocale, UErrorCode& status); /** * Create an empty generator, to be constructed with addPattern(...) etc. * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @stable ICU 3.8 */ static DateTimePatternGenerator* U_EXPORT2 createEmptyInstance(UErrorCode& status); /** * Destructor. * @stable ICU 3.8 */ virtual ~DateTimePatternGenerator(); /** * Clone DateTimePatternGenerator object. Clients are responsible for * deleting the DateTimePatternGenerator object cloned. * @stable ICU 3.8 */ DateTimePatternGenerator* clone() const; /** * Return true if another object is semantically equal to this one. * * @param other the DateTimePatternGenerator object to be compared with. * @return true if other is semantically equal to this. * @stable ICU 3.8 */ UBool operator==(const DateTimePatternGenerator& other) const; /** * Return true if another object is semantically unequal to this one. * * @param other the DateTimePatternGenerator object to be compared with. * @return true if other is semantically unequal to this. * @stable ICU 3.8 */ UBool operator!=(const DateTimePatternGenerator& other) const; /** * Utility to return a unique skeleton from a given pattern. For example, * both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd". * * @param pattern Input pattern, such as "dd/MMM" * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return skeleton such as "MMMdd" * @stable ICU 3.8 */ UnicodeString getSkeleton(const UnicodeString& pattern, UErrorCode& status); /** * Utility to return a unique base skeleton from a given pattern. This is * the same as the skeleton, except that differences in length are minimized * so as to only preserve the difference between string and numeric form. So * for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd" * (notice the single d). * * @param pattern Input pattern, such as "dd/MMM" * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return base skeleton, such as "Md" * @stable ICU 3.8 */ UnicodeString getBaseSkeleton(const UnicodeString& pattern, UErrorCode& status); /** * Adds a pattern to the generator. If the pattern has the same skeleton as * an existing pattern, and the override parameter is set, then the previous * value is overriden. Otherwise, the previous value is retained. In either * case, the conflicting status is set and previous vale is stored in * conflicting pattern. *
* Note that single-field patterns (like "MMM") are automatically added, and * don't need to be added explicitly! * * @param pattern Input pattern, such as "dd/MMM" * @param override When existing values are to be overridden use true, * otherwise use false. * @param conflictingPattern Previous pattern with the same skeleton. * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return conflicting status. The value could be UDATPG_NO_CONFLICT, * UDATPG_BASE_CONFLICT or UDATPG_CONFLICT. * @stable ICU 3.8 */ UDateTimePatternConflict addPattern(const UnicodeString& pattern, UBool override, UnicodeString& conflictingPattern, UErrorCode& status); /** * An AppendItem format is a pattern used to append a field if there is no * good match. For example, suppose that the input skeleton is "GyyyyMMMd", * and there is no matching pattern internally, but there is a pattern * matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the * G. The way these two are conjoined is by using the AppendItemFormat for G * (era). So if that value is, say "{0}, {1}" then the final resulting * pattern is "d-MM-yyyy, G". *
* There are actually three available variables: {0} is the pattern so far, * {1} is the element we are adding, and {2} is the name of the element. *
* This reflects the way that the CLDR data is organized. * * @param field such as UDATPG_ERA_FIELD. * @param value pattern, such as "{0}, {1}" * @stable ICU 3.8 */ void setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value); /** * Getter corresponding to setAppendItemFormat. Values below 0 or at or * above UDATPG_FIELD_COUNT are illegal arguments. * * @param field such as UDATPG_ERA_FIELD. * @return append pattern for field * @stable ICU 3.8 */ const UnicodeString& getAppendItemFormat(UDateTimePatternField field) const; /** * Sets the names of field, eg "era" in English for ERA. These are only * used if the corresponding AppendItemFormat is used, and if it contains a * {2} variable. *
* This reflects the way that the CLDR data is organized. * * @param field such as UDATPG_ERA_FIELD. * @param value name of the field * @stable ICU 3.8 */ void setAppendItemName(UDateTimePatternField field, const UnicodeString& value); /** * Getter corresponding to setAppendItemNames. Values below 0 or at or above * UDATPG_FIELD_COUNT are illegal arguments. * * @param field such as UDATPG_ERA_FIELD. * @return name for field * @stable ICU 3.8 */ const UnicodeString& getAppendItemName(UDateTimePatternField field) const; /** * The date time format is a message format pattern used to compose date and * time patterns. The default value is "{0} {1}", where {0} will be replaced * by the date pattern and {1} will be replaced by the time pattern. *
* This is used when the input skeleton contains both date and time fields, * but there is not a close match among the added patterns. For example, * suppose that this object was created by adding "dd-MMM" and "hh:mm", and * its datetimeFormat is the default "{0} {1}". Then if the input skeleton * is "MMMdhmm", there is not an exact match, so the input skeleton is * broken up into two components "MMMd" and "hmm". There are close matches * for those two skeletons, so the result is put together with this pattern, * resulting in "d-MMM h:mm". * * @param dateTimeFormat * message format pattern, here {0} will be replaced by the date * pattern and {1} will be replaced by the time pattern. * @stable ICU 3.8 */ void setDateTimeFormat(const UnicodeString& dateTimeFormat); /** * Getter corresponding to setDateTimeFormat. * @return DateTimeFormat. * @stable ICU 3.8 */ const UnicodeString& getDateTimeFormat() const; /** * Return the best pattern matching the input skeleton. It is guaranteed to * have all of the fields in the skeleton. * * @param skeleton * The skeleton is a pattern containing only the variable fields. * For example, "MMMdd" and "mmhh" are skeletons. * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return bestPattern * The best pattern found from the given skeleton. * @stable ICU 3.8 */ UnicodeString getBestPattern(const UnicodeString& skeleton, UErrorCode& status); /** * Adjusts the field types (width and subtype) of a pattern to match what is * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be * "dd-MMMM hh:mm". This is used internally to get the best match for the * input skeleton, but can also be used externally. * * @param pattern Input pattern * @param skeleton * The skeleton is a pattern containing only the variable fields. * For example, "MMMdd" and "mmhh" are skeletons. * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return pattern adjusted to match the skeleton fields widths and subtypes. * @stable ICU 3.8 */ UnicodeString replaceFieldTypes(const UnicodeString& pattern, const UnicodeString& skeleton, UErrorCode& status); /** * Return a list of all the skeletons (in canonical form) from this class. * * Call getPatternForSkeleton() to get the corresponding pattern. * * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return StringEnumeration with the skeletons. * The caller must delete the object. * @stable ICU 3.8 */ StringEnumeration* getSkeletons(UErrorCode& status) const; /** * Get the pattern corresponding to a given skeleton. * @param skeleton * @return pattern corresponding to a given skeleton. * @stable ICU 3.8 */ const UnicodeString& getPatternForSkeleton(const UnicodeString& skeleton) const; /** * Return a list of all the base skeletons (in canonical form) from this class. * * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return a StringEnumeration with the base skeletons. * The caller must delete the object. * @stable ICU 3.8 */ StringEnumeration* getBaseSkeletons(UErrorCode& status) const; /** * Return a list of redundant patterns are those which if removed, make no * difference in the resulting getBestPattern values. This method returns a * list of them, to help check the consistency of the patterns used to build * this generator. * * @param status Output param set to success/failure code on exit, * which must not indicate a failure before the function call. * @return a StringEnumeration with the redundant pattern. * The caller must delete the object. * @internal ICU 3.8 */ StringEnumeration* getRedundants(UErrorCode& status); /** * The decimal value is used in formatting fractions of seconds. If the * skeleton contains fractional seconds, then this is used with the * fractional seconds. For example, suppose that the input pattern is * "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and * the decimal string is ",". Then the resulting pattern is modified to be * "H:mm:ss,SSSS" * * @param decimal * @stable ICU 3.8 */ void setDecimal(const UnicodeString& decimal); /** * Getter corresponding to setDecimal. * @return UnicodeString corresponding to the decimal point * @stable ICU 3.8 */ const UnicodeString& getDecimal() const; /** * ICU "poor man's RTTI", returns a UClassID for the actual class. * * @stable ICU 3.8 */ virtual UClassID getDynamicClassID() const; /** * ICU "poor man's RTTI", returns a UClassID for this class. * * @stable ICU 3.8 */ static UClassID U_EXPORT2 getStaticClassID(void); private: /** * Constructor. * @stable ICU 3.8 */ DateTimePatternGenerator(UErrorCode & status); /** * Constructor. * @stable ICU 3.8 */ DateTimePatternGenerator(const Locale& locale, UErrorCode & status); /** * Copy constructor. * @param other DateTimePatternGenerator to copy * @stable ICU 3.8 */ DateTimePatternGenerator(const DateTimePatternGenerator& other); /** * Default assignment operator. * @param other DateTimePatternGenerator to copy * @stable ICU 3.8 */ DateTimePatternGenerator& operator=(const DateTimePatternGenerator& other); Locale pLocale; // pattern locale FormatParser *fp; DateTimeMatcher* dtMatcher; DistanceInfo *distanceInfo; PatternMap *patternMap; UnicodeString appendItemFormats[UDATPG_FIELD_COUNT]; UnicodeString appendItemNames[UDATPG_FIELD_COUNT]; UnicodeString dateTimeFormat; UnicodeString decimal; DateTimeMatcher *skipMatcher; Hashtable *fAvailableFormatKeyHash; UnicodeString hackPattern; UnicodeString emptyString; UChar fDefaultHourFormatChar; void initData(const Locale &locale, UErrorCode &status); void addCanonicalItems(); void addICUPatterns(const Locale& locale, UErrorCode& status); void hackTimes(const UnicodeString& hackPattern, UErrorCode& status); void addCLDRData(const Locale& locale, UErrorCode& status); UDateTimePatternConflict addPatternWithSkeleton(const UnicodeString& pattern, const UnicodeString * skeletonToUse, UBool override, UnicodeString& conflictingPattern, UErrorCode& status); void initHashtable(UErrorCode& status); void setDateTimeFromCalendar(const Locale& locale, UErrorCode& status); void setDecimalSymbols(const Locale& locale, UErrorCode& status); UDateTimePatternField getAppendFormatNumber(const char* field) const; UDateTimePatternField getAppendNameNumber(const char* field) const; void getAppendName(UDateTimePatternField field, UnicodeString& value); int32_t getCanonicalIndex(const UnicodeString& field); const UnicodeString* getBestRaw(DateTimeMatcher& source, int32_t includeMask, DistanceInfo* missingFields, const PtnSkeleton** specifiedSkeletonPtr = 0); UnicodeString adjustFieldTypes(const UnicodeString& pattern, const PtnSkeleton* specifiedSkeleton, UBool fixFractionalSeconds); UnicodeString getBestAppending(int32_t missingFields); int32_t getTopBitNumber(int32_t foundMask); void setAvailableFormat(const UnicodeString &key, UErrorCode& status); UBool isAvailableFormatSet(const UnicodeString &key) const; void copyHashtable(Hashtable *other, UErrorCode &status); UBool isCanonicalItem(const UnicodeString& item) const; } ;// end class DateTimePatternGenerator U_NAMESPACE_END #endif