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