225 lines
9.1 KiB
C++
225 lines
9.1 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2014-2016, International Business Machines Corporation and others.
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* All Rights Reserved.
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*******************************************************************************
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*/
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#ifndef REGION_H
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#define REGION_H
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/**
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* \file
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* \brief C++ API: Region classes (territory containment)
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*/
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#include "unicode/utypes.h"
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#include "unicode/uregion.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/uobject.h"
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#include "unicode/uniset.h"
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#include "unicode/unistr.h"
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#include "unicode/strenum.h"
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U_NAMESPACE_BEGIN
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/**
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* <code>Region</code> is the class representing a Unicode Region Code, also known as a
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* Unicode Region Subtag, which is defined based upon the BCP 47 standard. We often think of
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* "regions" as "countries" when defining the characteristics of a locale. Region codes There are different
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* types of region codes that are important to distinguish.
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* <p>
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* Macroregion - A code for a "macro geographical (continental) region, geographical sub-region, or
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* selected economic and other grouping" as defined in
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* UN M.49 (http://unstats.un.org/unsd/methods/m49/m49regin.htm).
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* These are typically 3-digit codes, but contain some 2-letter codes, such as the LDML code QO
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* added for Outlying Oceania. Not all UNM.49 codes are defined in LDML, but most of them are.
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* Macroregions are represented in ICU by one of three region types: WORLD ( region code 001 ),
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* CONTINENTS ( regions contained directly by WORLD ), and SUBCONTINENTS ( things contained directly
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* by a continent ).
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* <p>
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* TERRITORY - A Region that is not a Macroregion. These are typically codes for countries, but also
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* include areas that are not separate countries, such as the code "AQ" for Antarctica or the code
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* "HK" for Hong Kong (SAR China). Overseas dependencies of countries may or may not have separate
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* codes. The codes are typically 2-letter codes aligned with the ISO 3166 standard, but BCP47 allows
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* for the use of 3-digit codes in the future.
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* <p>
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* UNKNOWN - The code ZZ is defined by Unicode LDML for use to indicate that the Region is unknown,
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* or that the value supplied as a region was invalid.
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* <p>
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* DEPRECATED - Region codes that have been defined in the past but are no longer in modern usage,
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* usually due to a country splitting into multiple territories or changing its name.
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* <p>
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* GROUPING - A widely understood grouping of territories that has a well defined membership such
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* that a region code has been assigned for it. Some of these are UNM.49 codes that do't fall into
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* the world/continent/sub-continent hierarchy, while others are just well known groupings that have
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* their own region code. Region "EU" (European Union) is one such region code that is a grouping.
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* Groupings will never be returned by the getContainingRegion() API, since a different type of region
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* ( WORLD, CONTINENT, or SUBCONTINENT ) will always be the containing region instead.
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*
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* The Region class is not intended for public subclassing.
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*
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* @author John Emmons
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* @stable ICU 51
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*/
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class U_I18N_API Region : public UObject {
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public:
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/**
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* Destructor.
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* @stable ICU 51
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*/
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virtual ~Region();
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/**
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* Returns true if the two regions are equal.
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* @stable ICU 51
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*/
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UBool operator==(const Region &that) const;
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/**
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* Returns true if the two regions are NOT equal; that is, if operator ==() returns false.
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* @stable ICU 51
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*/
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UBool operator!=(const Region &that) const;
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/**
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* Returns a pointer to a Region using the given region code. The region code can be either 2-letter ISO code,
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* 3-letter ISO code, UNM.49 numeric code, or other valid Unicode Region Code as defined by the LDML specification.
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* The identifier will be canonicalized internally using the supplemental metadata as defined in the CLDR.
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* If the region code is NULL or not recognized, the appropriate error code will be set ( U_ILLEGAL_ARGUMENT_ERROR )
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* @stable ICU 51
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*/
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static const Region* U_EXPORT2 getInstance(const char *region_code, UErrorCode &status);
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/**
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* Returns a pointer to a Region using the given numeric region code. If the numeric region code is not recognized,
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* the appropriate error code will be set ( U_ILLEGAL_ARGUMENT_ERROR ).
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* @stable ICU 51
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*/
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static const Region* U_EXPORT2 getInstance (int32_t code, UErrorCode &status);
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/**
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* Returns an enumeration over the IDs of all known regions that match the given type.
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* @stable ICU 55
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*/
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static StringEnumeration* U_EXPORT2 getAvailable(URegionType type, UErrorCode &status);
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/**
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* Returns a pointer to the region that contains this region. Returns NULL if this region is code "001" (World)
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* or "ZZ" (Unknown region). For example, calling this method with region "IT" (Italy) returns the
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* region "039" (Southern Europe).
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* @stable ICU 51
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*/
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const Region* getContainingRegion() const;
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/**
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* Return a pointer to the region that geographically contains this region and matches the given type,
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* moving multiple steps up the containment chain if necessary. Returns NULL if no containing region can be found
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* that matches the given type. Note: The URegionTypes = "URGN_GROUPING", "URGN_DEPRECATED", or "URGN_UNKNOWN"
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* are not appropriate for use in this API. NULL will be returned in this case. For example, calling this method
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* with region "IT" (Italy) for type "URGN_CONTINENT" returns the region "150" ( Europe ).
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* @stable ICU 51
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*/
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const Region* getContainingRegion(URegionType type) const;
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/**
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* Return an enumeration over the IDs of all the regions that are immediate children of this region in the
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* region hierarchy. These returned regions could be either macro regions, territories, or a mixture of the two,
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* depending on the containment data as defined in CLDR. This API may return NULL if this region doesn't have
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* any sub-regions. For example, calling this method with region "150" (Europe) returns an enumeration containing
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* the various sub regions of Europe - "039" (Southern Europe) - "151" (Eastern Europe) - "154" (Northern Europe)
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* and "155" (Western Europe).
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* @stable ICU 55
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*/
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StringEnumeration* getContainedRegions(UErrorCode &status) const;
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/**
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* Returns an enumeration over the IDs of all the regions that are children of this region anywhere in the region
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* hierarchy and match the given type. This API may return an empty enumeration if this region doesn't have any
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* sub-regions that match the given type. For example, calling this method with region "150" (Europe) and type
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* "URGN_TERRITORY" returns a set containing all the territories in Europe ( "FR" (France) - "IT" (Italy) - "DE" (Germany) etc. )
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* @stable ICU 55
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*/
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StringEnumeration* getContainedRegions( URegionType type, UErrorCode &status ) const;
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/**
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* Returns true if this region contains the supplied other region anywhere in the region hierarchy.
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* @stable ICU 51
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*/
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UBool contains(const Region &other) const;
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/**
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* For deprecated regions, return an enumeration over the IDs of the regions that are the preferred replacement
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* regions for this region. Returns null for a non-deprecated region. For example, calling this method with region
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* "SU" (Soviet Union) would return a list of the regions containing "RU" (Russia), "AM" (Armenia), "AZ" (Azerbaijan), etc...
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* @stable ICU 55
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*/
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StringEnumeration* getPreferredValues(UErrorCode &status) const;
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/**
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* Return this region's canonical region code.
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* @stable ICU 51
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*/
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const char* getRegionCode() const;
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/**
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* Return this region's numeric code.
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* Returns a negative value if the given region does not have a numeric code assigned to it.
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* @stable ICU 51
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*/
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int32_t getNumericCode() const;
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/**
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* Returns the region type of this region.
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* @stable ICU 51
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*/
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URegionType getType() const;
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#ifndef U_HIDE_INTERNAL_API
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/**
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* Cleans up statically allocated memory.
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* @internal
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*/
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static void cleanupRegionData();
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#endif /* U_HIDE_INTERNAL_API */
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private:
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char id[4];
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UnicodeString idStr;
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int32_t code;
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URegionType type;
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Region *containingRegion;
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UVector *containedRegions;
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UVector *preferredValues;
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/**
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* Default Constructor. Internal - use factory methods only.
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*/
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Region();
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/*
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* Initializes the region data from the ICU resource bundles. The region data
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* contains the basic relationships such as which regions are known, what the numeric
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* codes are, any known aliases, and the territory containment data.
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*
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* If the region data has already loaded, then this method simply returns without doing
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* anything meaningful.
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*/
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static void U_CALLCONV loadRegionData(UErrorCode &status);
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};
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_FORMATTING */
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#endif // REGION_H
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//eof
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