| /* |
| ******************************************************************************* |
| * Copyright (C) 2011-2014, International Business Machines Corporation and |
| * others. All Rights Reserved. |
| ******************************************************************************* |
| */ |
| #ifndef __TZNAMES_H |
| #define __TZNAMES_H |
| |
| /** |
| * \file |
| * \brief C++ API: TimeZoneNames |
| */ |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/uloc.h" |
| #include "unicode/unistr.h" |
| |
| U_CDECL_BEGIN |
| |
| /** |
| * Constants for time zone display name types. |
| * @stable ICU 50 |
| */ |
| typedef enum UTimeZoneNameType { |
| /** |
| * Unknown display name type. |
| * @stable ICU 50 |
| */ |
| UTZNM_UNKNOWN = 0x00, |
| /** |
| * Long display name, such as "Eastern Time". |
| * @stable ICU 50 |
| */ |
| UTZNM_LONG_GENERIC = 0x01, |
| /** |
| * Long display name for standard time, such as "Eastern Standard Time". |
| * @stable ICU 50 |
| */ |
| UTZNM_LONG_STANDARD = 0x02, |
| /** |
| * Long display name for daylight saving time, such as "Eastern Daylight Time". |
| * @stable ICU 50 |
| */ |
| UTZNM_LONG_DAYLIGHT = 0x04, |
| /** |
| * Short display name, such as "ET". |
| * @stable ICU 50 |
| */ |
| UTZNM_SHORT_GENERIC = 0x08, |
| /** |
| * Short display name for standard time, such as "EST". |
| * @stable ICU 50 |
| */ |
| UTZNM_SHORT_STANDARD = 0x10, |
| /** |
| * Short display name for daylight saving time, such as "EDT". |
| * @stable ICU 50 |
| */ |
| UTZNM_SHORT_DAYLIGHT = 0x20, |
| /** |
| * Exemplar location name, such as "Los Angeles". |
| * @stable ICU 51 |
| */ |
| UTZNM_EXEMPLAR_LOCATION = 0x40 |
| } UTimeZoneNameType; |
| |
| U_CDECL_END |
| |
| U_NAMESPACE_BEGIN |
| |
| class UVector; |
| struct MatchInfo; |
| |
| /** |
| * <code>TimeZoneNames</code> is an abstract class representing the time zone display name data model defined |
| * by <a href="http://www.unicode.org/reports/tr35/">UTS#35 Unicode Locale Data Markup Language (LDML)</a>. |
| * The model defines meta zone, which is used for storing a set of display names. A meta zone can be shared |
| * by multiple time zones. Also a time zone may have multiple meta zone historic mappings. |
| * <p> |
| * For example, people in the United States refer the zone used by the east part of North America as "Eastern Time". |
| * The tz database contains multiple time zones "America/New_York", "America/Detroit", "America/Montreal" and some |
| * others that belong to "Eastern Time". However, assigning different display names to these time zones does not make |
| * much sense for most of people. |
| * <p> |
| * In <a href="http://cldr.unicode.org/">CLDR</a> (which uses LDML for representing locale data), the display name |
| * "Eastern Time" is stored as long generic display name of a meta zone identified by the ID "America_Eastern". |
| * Then, there is another table maintaining the historic mapping to meta zones for each time zone. The time zones in |
| * the above example ("America/New_York", "America/Detroit"...) are mapped to the meta zone "America_Eastern". |
| * <p> |
| * Sometimes, a time zone is mapped to a different time zone in the past. For example, "America/Indiana/Knox" |
| * had been moving "Eastern Time" and "Central Time" back and forth. Therefore, it is necessary that time zone |
| * to meta zones mapping data are stored by date range. |
| * |
| * <p><b>Note:</b> |
| * The methods in this class assume that time zone IDs are already canonicalized. For example, you may not get proper |
| * result returned by a method with time zone ID "America/Indiana/Indianapolis", because it's not a canonical time zone |
| * ID (the canonical time zone ID for the time zone is "America/Indianapolis". See |
| * {@link TimeZone#getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)} about ICU |
| * canonical time zone IDs. |
| * |
| * <p> |
| * In CLDR, most of time zone display names except location names are provided through meta zones. But a time zone may |
| * have a specific name that is not shared with other time zones. |
| * |
| * For example, time zone "Europe/London" has English long name for standard time "Greenwich Mean Time", which is also |
| * shared with other time zones. However, the long name for daylight saving time is "British Summer Time", which is only |
| * used for "Europe/London". |
| * |
| * <p> |
| * {@link #getTimeZoneDisplayName} is designed for accessing a name only used by a single time zone. |
| * But is not necessarily mean that a subclass implementation use the same model with CLDR. A subclass implementation |
| * may provide time zone names only through {@link #getTimeZoneDisplayName}, or only through {@link #getMetaZoneDisplayName}, |
| * or both. |
| * |
| * <p> |
| * The default <code>TimeZoneNames</code> implementation returned by {@link #createInstance} |
| * uses the locale data imported from CLDR. In CLDR, set of meta zone IDs and mappings between zone IDs and meta zone |
| * IDs are shared by all locales. Therefore, the behavior of {@link #getAvailableMetaZoneIDs}, |
| * {@link #getMetaZoneID}, and {@link #getReferenceZoneID} won't be changed no matter |
| * what locale is used for getting an instance of <code>TimeZoneNames</code>. |
| * |
| * @stable ICU 50 |
| */ |
| class U_I18N_API TimeZoneNames : public UObject { |
| public: |
| /** |
| * Destructor. |
| * @stable ICU 50 |
| */ |
| virtual ~TimeZoneNames(); |
| |
| /** |
| * Return true if the given TimeZoneNames objects are emantically equal. |
| * @param other the object to be compared with. |
| * @return Return TRUE if the given Format objects are semantically equal. |
| * @stable ICU 50 |
| */ |
| virtual UBool operator==(const TimeZoneNames& other) const = 0; |
| |
| /** |
| * Return true if the given TimeZoneNames objects are not semantically |
| * equal. |
| * @param other the object to be compared with. |
| * @return Return TRUE if the given Format objects are not semantically equal. |
| * @stable ICU 50 |
| */ |
| UBool operator!=(const TimeZoneNames& other) const { return !operator==(other); } |
| |
| /** |
| * Clone this object polymorphically. The caller is responsible |
| * for deleting the result when done. |
| * @return A copy of the object |
| * @stable ICU 50 |
| */ |
| virtual TimeZoneNames* clone() const = 0; |
| |
| /** |
| * Returns an instance of <code>TimeZoneNames</code> for the specified locale. |
| * |
| * @param locale The locale. |
| * @param status Receives the status. |
| * @return An instance of <code>TimeZoneNames</code> |
| * @stable ICU 50 |
| */ |
| static TimeZoneNames* U_EXPORT2 createInstance(const Locale& locale, UErrorCode& status); |
| |
| #ifndef U_HIDE_DRAFT_API |
| /** |
| * Returns an instance of <code>TimeZoneNames</code> containing only short specific |
| * zone names (SHORT_STANDARD and SHORT_DAYLIGHT), |
| * compatible with the IANA tz database's zone abbreviations (not localized). |
| * <br> |
| * Note: The input locale is used for resolving ambiguous names (e.g. "IST" is parsed |
| * as Israel Standard Time for Israel, while it is parsed as India Standard Time for |
| * all other regions). The zone names returned by this instance are not localized. |
| * @draft ICU 54 |
| */ |
| static TimeZoneNames* U_EXPORT2 createTZDBInstance(const Locale& locale, UErrorCode& status); |
| #endif /* U_HIDE_DRAFT_API */ |
| |
| /** |
| * Returns an enumeration of all available meta zone IDs. |
| * @param status Receives the status. |
| * @return an enumeration object, owned by the caller. |
| * @stable ICU 50 |
| */ |
| virtual StringEnumeration* getAvailableMetaZoneIDs(UErrorCode& status) const = 0; |
| |
| /** |
| * Returns an enumeration of all available meta zone IDs used by the given time zone. |
| * @param tzID The canoical tiem zone ID. |
| * @param status Receives the status. |
| * @return an enumeration object, owned by the caller. |
| * @stable ICU 50 |
| */ |
| virtual StringEnumeration* getAvailableMetaZoneIDs(const UnicodeString& tzID, UErrorCode& status) const = 0; |
| |
| /** |
| * Returns the meta zone ID for the given canonical time zone ID at the given date. |
| * @param tzID The canonical time zone ID. |
| * @param date The date. |
| * @param mzID Receives the meta zone ID for the given time zone ID at the given date. If the time zone does not have a |
| * corresponding meta zone at the given date or the implementation does not support meta zones, "bogus" state |
| * is set. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getMetaZoneID(const UnicodeString& tzID, UDate date, UnicodeString& mzID) const = 0; |
| |
| /** |
| * Returns the reference zone ID for the given meta zone ID for the region. |
| * |
| * Note: Each meta zone must have a reference zone associated with a special region "001" (world). |
| * Some meta zones may have region specific reference zone IDs other than the special region |
| * "001". When a meta zone does not have any region specific reference zone IDs, this method |
| * return the reference zone ID for the special region "001" (world). |
| * |
| * @param mzID The meta zone ID. |
| * @param region The region. |
| * @param tzID Receives the reference zone ID ("golden zone" in the LDML specification) for the given time zone ID for the |
| * region. If the meta zone is unknown or the implementation does not support meta zones, "bogus" state |
| * is set. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getReferenceZoneID(const UnicodeString& mzID, const char* region, UnicodeString& tzID) const = 0; |
| |
| /** |
| * Returns the display name of the meta zone. |
| * @param mzID The meta zone ID. |
| * @param type The display name type. See {@link #UTimeZoneNameType}. |
| * @param name Receives the display name of the meta zone. When this object does not have a localized display name for the given |
| * meta zone with the specified type or the implementation does not provide any display names associated |
| * with meta zones, "bogus" state is set. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getMetaZoneDisplayName(const UnicodeString& mzID, UTimeZoneNameType type, UnicodeString& name) const = 0; |
| |
| /** |
| * Returns the display name of the time zone. Unlike {@link #getDisplayName}, |
| * this method does not get a name from a meta zone used by the time zone. |
| * @param tzID The canonical time zone ID. |
| * @param type The display name type. See {@link #UTimeZoneNameType}. |
| * @param name Receives the display name for the time zone. When this object does not have a localized display name for the given |
| * time zone with the specified type, "bogus" state is set. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getTimeZoneDisplayName(const UnicodeString& tzID, UTimeZoneNameType type, UnicodeString& name) const = 0; |
| |
| /** |
| * Returns the exemplar location name for the given time zone. When this object does not have a localized location |
| * name, the default implementation may still returns a programmatically generated name with the logic described |
| * below. |
| * <ol> |
| * <li>Check if the ID contains "/". If not, return null. |
| * <li>Check if the ID does not start with "Etc/" or "SystemV/". If it does, return null. |
| * <li>Extract a substring after the last occurrence of "/". |
| * <li>Replace "_" with " ". |
| * </ol> |
| * For example, "New York" is returned for the time zone ID "America/New_York" when this object does not have the |
| * localized location name. |
| * |
| * @param tzID The canonical time zone ID |
| * @param name Receives the exemplar location name for the given time zone, or "bogus" state is set when a localized |
| * location name is not available and the fallback logic described above cannot extract location from the ID. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getExemplarLocationName(const UnicodeString& tzID, UnicodeString& name) const; |
| |
| /** |
| * Returns the display name of the time zone at the given date. |
| * <p> |
| * <b>Note:</b> This method calls the subclass's {@link #getTimeZoneDisplayName} first. When the |
| * result is bogus, this method calls {@link #getMetaZoneID} to get the meta zone ID mapped from the |
| * time zone, then calls {@link #getMetaZoneDisplayName}. |
| * |
| * @param tzID The canonical time zone ID. |
| * @param type The display name type. See {@link #UTimeZoneNameType}. |
| * @param date The date. |
| * @param name Receives the display name for the time zone at the given date. When this object does not have a localized display |
| * name for the time zone with the specified type and date, "bogus" state is set. |
| * @return A reference to the result. |
| * @stable ICU 50 |
| */ |
| virtual UnicodeString& getDisplayName(const UnicodeString& tzID, UTimeZoneNameType type, UDate date, UnicodeString& name) const; |
| |
| /** |
| * <code>MatchInfoCollection</code> represents a collection of time zone name matches used by |
| * {@link TimeZoneNames#find}. |
| * @internal |
| */ |
| class U_I18N_API MatchInfoCollection : public UMemory { |
| public: |
| /** |
| * Constructor. |
| * @internal |
| */ |
| MatchInfoCollection(); |
| /** |
| * Destructor. |
| * @internal |
| */ |
| virtual ~MatchInfoCollection(); |
| |
| #ifndef U_HIDE_INTERNAL_API |
| /** |
| * Adds a zone match. |
| * @param nameType The name type. |
| * @param matchLength The match length. |
| * @param tzID The time zone ID. |
| * @param status Receives the status |
| * @internal |
| */ |
| void addZone(UTimeZoneNameType nameType, int32_t matchLength, |
| const UnicodeString& tzID, UErrorCode& status); |
| |
| /** |
| * Adds a meata zone match. |
| * @param nameType The name type. |
| * @param matchLength The match length. |
| * @param mzID The metazone ID. |
| * @param status Receives the status |
| * @internal |
| */ |
| void addMetaZone(UTimeZoneNameType nameType, int32_t matchLength, |
| const UnicodeString& mzID, UErrorCode& status); |
| |
| /** |
| * Returns the number of entries available in this object. |
| * @return The number of entries. |
| * @internal |
| */ |
| int32_t size() const; |
| |
| /** |
| * Returns the time zone name type of a match at the specified index. |
| * @param idx The index |
| * @return The time zone name type. If the specified idx is out of range, |
| * it returns UTZNM_UNKNOWN. |
| * @see UTimeZoneNameType |
| * @internal |
| */ |
| UTimeZoneNameType getNameTypeAt(int32_t idx) const; |
| |
| /** |
| * Returns the match length of a match at the specified index. |
| * @param idx The index |
| * @return The match length. If the specified idx is out of range, |
| * it returns 0. |
| * @internal |
| */ |
| int32_t getMatchLengthAt(int32_t idx) const; |
| |
| /** |
| * Gets the zone ID of a match at the specified index. |
| * @param idx The index |
| * @param tzID Receives the zone ID. |
| * @return TRUE if the zone ID was set to tzID. |
| * @internal |
| */ |
| UBool getTimeZoneIDAt(int32_t idx, UnicodeString& tzID) const; |
| |
| /** |
| * Gets the metazone ID of a match at the specified index. |
| * @param idx The index |
| * @param mzID Receives the metazone ID |
| * @return TRUE if the meta zone ID was set to mzID. |
| * @internal |
| */ |
| UBool getMetaZoneIDAt(int32_t idx, UnicodeString& mzID) const; |
| #endif /* U_HIDE_INTERNAL_API */ |
| |
| private: |
| UVector* fMatches; // vector of MatchEntry |
| |
| UVector* matches(UErrorCode& status); |
| }; |
| |
| /** |
| * Finds time zone name prefix matches for the input text at the |
| * given offset and returns a collection of the matches. |
| * @param text The text. |
| * @param start The starting offset within the text. |
| * @param types The set of name types represented by bitwise flags of UTimeZoneNameType enums, |
| * or UTZNM_UNKNOWN for all name types. |
| * @param status Receives the status. |
| * @return A collection of matches (owned by the caller), or NULL if no matches are found. |
| * @see UTimeZoneNameType |
| * @see MatchInfoCollection |
| * @internal |
| */ |
| virtual MatchInfoCollection* find(const UnicodeString& text, int32_t start, uint32_t types, UErrorCode& status) const = 0; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif |
| #endif |
