* The resource bundle file is a text (ASCII or Unicode) file with the format: *
* . locale {
* . tag1 {...}
* . tag2 {...}
* . }
*
* The tags are used to retrieve the data later. You may not have multiple instances of
* the same tag.
* * Four data types are supported. These are solitary strings, comma-delimited lists of * strings, 2-dimensional arrays of strings, and tagged lists of strings. *
* Note that all data is textual. Adjacent strings are merged by the low-level * tokenizer, so that the following effects occur: foo bar, baz // 2 elements, "foo * bar", and "baz" "foo" "bar", baz // 2 elements, "foobar", and "baz" Note that a * single intervening space is added between merged strings, unless they are both double * quoted. This extends to more than two strings in a row. *
* Whitespace is ignored, as in a C source file. *
* Solitary strings have the format: *
* . Tag { Data }
*
* This is indistinguishable from a comma-delimited list with only one element, and in
* fact may be retrieved as such (as an array, or as element 0 or an array).
* * Comma-delimited lists have the format: *
* . Tag { Data, Data, Data }
*
* Parsing is lenient; a final string, after the last element, is allowed.
* * Tagged lists have the format: *
* . Tag { Subtag { Data } Subtag {Data} }
*
* Data is retrieved by specifying the subtag.
* * Two-dimensional arrays have the format: *
* . TwoD {
* . { r1c1, r1c2, ..., r1cm },
* . { r2c1, r2c2, ..., r2cm },
* . ...
* . { rnc1, rnc2, ..., rncm }
* . }
*
* where n is the number of rows, and m is the number of columns. Parsing is lenient (as
* in other data types). A final comma is always allowed after the last element; either
* the last string in a row, or the last row itself. Furthermore, since there is no
* ambiguity, the commas between the rows are entirely optional. (However, if a comma is
* present, there can only be one comma, no more.) It is possible to have zero columns,
* as follows:
*
* . Odd { {} {} {} } // 3 x 0 array
*
* But it is impossible to have zero rows. The smallest array is thus a 1 x 0 array,
* which looks like this:
*
* . Smallest { {} } // 1 x 0 array
*
* The array must be strictly rectangular; that is, each row must have the same number
* of elements.
* * This is an example for using a possible custom resource: *
* . Locale currentLocale;
* . UErrorCode success = U_ZERO_ERROR;
* . ResourceBundle myResources("MyResources", currentLocale, success );
* .
* . UnicodeString button1Title, button2Title;
* . myResources.getString("OkKey", button1Title, success );
* . myResources.getString("CancelKey", button2Title, success );
*
* @draft
*/
class U_COMMON_API ResourceBundle {
public:
/**
* Constructor
*
* @param path This is a full pathname in the platform-specific format for the
* directory containing the resource data files we want to load
* resources from. We use locale IDs to generate filenames, and the
* filenames have this string prepended to them before being passed
* to the C++ I/O functions. Therefore, this string must always end
* with a directory delimiter (whatever that is for the target OS)
* for this class to work correctly.
* @param locale This is the locale this resource bundle is for. To get resources
* for the French locale, for example, you would create a
* ResourceBundle passing Locale::FRENCH for the "locale" parameter,
* and all subsequent calls to that resource bundle will return
* resources that pertain to the French locale. If the caller doesn't
* pass a locale parameter, the default locale for the system (as
* returned by Locale::getDefault()) will be used.
* The UErrorCode& err parameter is used to return status information to the user. To
* check whether the construction succeeded or not, you should check the value of
* U_SUCCESS(err). If you wish more detailed information, you can check for
* informational error results which still indicate success. U_USING_FALLBACK_ERROR
* indicates that a fall back locale was used. For example, 'de_CH' was requested,
* but nothing was found there, so 'de' was used. U_USING_DEFAULT_ERROR indicates that
* the default locale data was used; neither the requested locale nor any of its
* fall back locales could be found.
* @draft
*/
ResourceBundle( const UnicodeString& path,
const Locale& locale,
UErrorCode& err);
ResourceBundle( const UnicodeString& path,
UErrorCode& err);
ResourceBundle( const wchar_t* path,
const Locale& locale,
UErrorCode& err);
~ResourceBundle();
/**
* Returns the contents of a string resource. Resource data is undifferentiated
* Unicode text. The resource file may contain quoted strings or escape sequences;
* these will be parsed prior to the data's return.
* [THIS FUNCTION IS DERECATED; USE THE OVERLOAD BELOW INSTEAD]
*
* @param resourceTag The resource tag of the string resource the caller wants
* @param theString Receives the actual data in the resource
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found.
* @draft
*/
void getString( const char *resourceTag,
UnicodeString& theString,
UErrorCode& err) const;
/**
* Returns the contents of a string resource. Resource data is undifferentiated
* Unicode text. The resource file may contain quoted strings or escape sequences;
* these will be parsed prior to the data's return.
*
* @param resourceTag The resource tag of the string resource the caller wants
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found.
* @return A pointer to the string from the resource bundle, or NULL if there was
* an error.
* @draft
*/
const UnicodeString* getString( const char *resourceTag,
UErrorCode& err) const;
/**
* Returns the contents of a string-array resource. This will return the contents of
* a string-array (comma-delimited-list) resource as a C++ array of UnicodeString
* objects. The number of elements in the array is returned in numArrayItems.
* Calling getStringArray on a resource of type string will return an array with one
* element; calling it on a resource of type tagged-array results in a
* U_MISSING_RESOURCE_ERROR error.
*
* @param resourceTag The resource tag of the string-array resource the caller
* wants
* @param numArrayItems Receives the number of items in the array the function
* returns.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found.
* @return The resource requested, as a pointer to an array of
* UnicodeStrings. The caller does not own the storage and
* must not delete it.
* @draft
*/
const UnicodeString* getStringArray( const char *resourceTag,
int32_t& numArrayItems,
UErrorCode& err) const;
/**
* Returns a single item from a string-array resource. This will return the contents
* of a single item in a resource of string-array (comma-delimited-list) type. If
* the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err.
* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param index The index (zero-based) of the particular array item the user
* wants to extract from the resource.
* @param theArrayItem Receives the actual text of the desired array item.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found, or if the index was out of range.
* @draft
*/
void getArrayItem( const char *resourceTag,
int32_t index,
UnicodeString& theArrayItem,
UErrorCode& err) const;
/**
* Returns a single item from a string-array resource. This will return the contents
* of a single item in a resource of string-array (comma-delimited-list) type. If
* the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err.
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param index The index (zero-based) of the particular array item the user
* wants to extract from the resource.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found, or if the index was out of range.
* @return A pointer to the text of the array item, or NULL is there was an error.
* @draft
*/
const UnicodeString* getArrayItem( const char *resourceTag,
int32_t index,
UErrorCode& err) const;
/**
* Return the contents of a 2-dimensional array resource. The return value will be a
* UnicodeString** array. (This is really an array of pointers; each pointer is a
* ROW of the data.) The number of rows and columns is returned. If the resource is
* of the wrong type, or not present, U_MISSING_RESOURCE_ERROR is placed in err.
*
* @param resourceTag The resource tag of the string-array resource the caller
* wants
* @param rowCount Receives the number of rows in the array the function
* returns.
* @param columnCount Receives the number of columns in the array the function
* returns.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found.
* @return The resource requested, as a UnicodeStrings**. The caller
* does not own the storage and must not delete it.
* @draft
*/
const UnicodeString** get2dArray(const char *resourceTag,
int32_t& rowCount,
int32_t& columnCount,
UErrorCode& err) const;
/**
* Return a single string from a 2-dimensional array resource. If the resource does
* not exists, or if it is not a 2-d array, or if the row or column indices are out
* of bounds, err is set to U_MISSING_RESOURCE_ERROR.
* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param rowIndex The row index (zero-based) of the array item the user wants
* to extract from the resource.
* @param columnIndex The column index (zero-based) of the array item the user
* wants to extract from the resource.
* @param theArrayItem Receives the actual text of the desired array item.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found, if the resource data was in
* the wrong format, or if either index is out of bounds.
* @draft
*/
void get2dArrayItem(const char *resourceTag,
int32_t rowIndex,
int32_t columnIndex,
UnicodeString& theArrayItem,
UErrorCode& err) const;
/**
* Return a single string from a 2-dimensional array resource. If the resource does
* not exists, or if it is not a 2-d array, or if the row or column indices are out
* of bounds, err is set to U_MISSING_RESOURCE_ERROR.
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param rowIndex The row index (zero-based) of the array item the user wants
* to extract from the resource.
* @param columnIndex The column index (zero-based) of the array item the user
* wants to extract from the resource.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found, if the resource data was in
* the wrong format, or if either index is out of bounds.
* @return A pointer to the text of the array item, or NULL is there was an error.
* @draft
*/
const UnicodeString* get2dArrayItem( const char *resourceTag,
int32_t rowIndex,
int32_t columnIndex,
UErrorCode& err) const;
/**
* Returns a single item from a tagged-array resource This will return the contents
* of a single item in a resource of type tagged-array. If this function is called
* for a resource that is not of type tagged-array, it will set err to
* MISSING_RESOUCE_ERROR.
* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param itemTag The item tag for the item the caller wants to extract.
* @param theArrayItem Receives the text of the desired array item.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified resource tag couldn't be found, or if an item
* with the specified item tag couldn't be found in the resource.
* @draft
*/
void getTaggedArrayItem( const char *resourceTag,
const UnicodeString& itemTag,
UnicodeString& theArrayItem,
UErrorCode& err) const;
/**
* Returns a single item from a tagged-array resource This will return the contents
* of a single item in a resource of type tagged-array. If this function is called
* for a resource that is not of type tagged-array, it will set err to
* MISSING_RESOUCE_ERROR.
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param itemTag The item tag for the item the caller wants to extract.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified resource tag couldn't be found, or if an item
* with the specified item tag coldn't be found in the resource.
* @return A pointer to the text of the array item, or NULL is there was an error.
* @draft
*/
const UnicodeString* getTaggedArrayItem( const char *resourceTag,
const UnicodeString& itemTag,
UErrorCode& err) const;
/**
* Returns a tagged-array resource. The contents of the resource is returned as two
* separate arrays of UnicodeStrings, the addresses of which are placed in "itemTags"
* and "items". After calling this function, the items in the resource will be in the
* list pointed to by "items", and for each items[i], itemTags[i] will be the tag that
* corresponds to it. The total number of entries in both arrays is returned in
* numItems.
*
* @param resourceTag The resource tag of the resource the caller wants to extract
* an item from.
* @param itemTags Set to point to an array of UnicodeStrings representing the
* tags in the specified resource. The caller DOES own this array,
* and must delete it.
* @param items Set to point to an array of UnicodeStrings containing the
* individual resource items themselves. itemTags[i] will
* contain the tag corresponding to items[i]. The caller DOES
* own this array, and must delete it.
* @param numItems Receives the number of items in the arrays pointed to by
* items and itemTags.
* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
* specified tag couldn't be found.
* @draft
*/
void getTaggedArray( const char *resourceTag,
UnicodeString*& itemTags,
UnicodeString*& items,
int32_t& numItems,
UErrorCode& err) const;
/**
* Return the version number associated with this ResourceBundle. This version
* number is a string of the form MAJOR.MINOR, where MAJOR is the version number of
* the current analytic code package, and MINOR is the version number contained in
* the resource file as the value of the tag "Version". A change in the MINOR
* version indicated an updated data file. A change in the MAJOR version indicates a
* new version of the code which is not binary-compatible with the previous version.
* If no "Version" tag is present in a resource file, the MINOR version "0" is assigned.
*
* For example, if the Collation sort key algorithm changes, the MAJOR version
* increments. If the collation data in a resource file changes, the MINOR version
* for that file increments.
*
* @return A string of the form N.n, where N is the major version number,
* representing the code version, and n is the minor version number,
* representing the resource data file. The caller does not own this
* string.
* @draft
*/
const char* getVersionNumber(void) const;
/**
* Return the Locale associated with this ResourceBundle.
*
* @return a Locale object
* @draft
*/
const Locale &getLocale(void) const ;
private:
class U_COMMON_API PathInfo {
public:
PathInfo();
PathInfo(const PathInfo& source);
PathInfo(const UnicodeString& path);
PathInfo(const UnicodeString& path, const UnicodeString& suffix);
PathInfo(const wchar_t* path, const wchar_t* suffix);
~PathInfo();
PathInfo& operator=(const PathInfo& source);
bool_t fileExists(const UnicodeString& localeName) const;
UnicodeString makeCacheKey(const UnicodeString& localeName) const;
UnicodeString makeHashkey(const UnicodeString& localeName) const;
FileStream* openFile(const UnicodeString& localeName) const;
private:
static const UChar kSeparator;
UnicodeString fPrefix;
UnicodeString fSuffix;
wchar_t* fWPrefix;
wchar_t* fWSuffix;
};
private:
friend class Locale;
friend class RuleBasedCollator;
friend int32_t T_ResourceBundle_countArrayItemsImplementation(const ResourceBundle* resourceBundle,
const char* resourceKey,
UErrorCode& err) ;
friend const UnicodeString** listInstalledLocalesImplementation(const char* path,
int32_t* numInstalledLocales);
friend void getTaggedArrayUCharsImplementation(
const ResourceBundle* bundle,
const char *resourceTag,
UChar const** itemTags,
UChar const** items,
int32_t maxItems,
int32_t& numItems,
UErrorCode& err);
/**
* This constructor is used by Collation to load a resource bundle from a specific
* file, without trying other files. This is used by the Collation caching
* mechanism.
*/
ResourceBundle( const UnicodeString& path,
const char *localeName,
UErrorCode& status);
/**
* Return a list of all installed locales. This function returns a list of the IDs
* of all locales represented in the directory specified by this ResourceBundle. It
* depends on that directory having an "Index" tagged-list item in its "index.txt"
* file; it parses that list to determine its return value (therefore, that list
* also has to be up to date). This function is static.
*
* This function is the implementation of the Locale::listInstalledLocales()
* function. It's private because the API for it real;ly belongs in Locale.
*
* @param path The path to the locale data files. The function will
* look here for "index.txt".
* @param numInstalledLocales Receives the number of installed locales, according
* to the Index resource in index.txt.
* @return A list of the installed locales, as a pointer to an
* array of UnicodeStrings. This storage is not owned by
* the caller, who must not delete it. The information
* in this list is derived from the Index resource in
* default.txt, which must be kept up to date.
*/
static const UnicodeString* listInstalledLocales(const UnicodeString& path,
int32_t& numInstalledLocales);
/**
* Retrieve a ResourceBundle from the cache. Return NULL if not found.
*/
static const UHashtable* getFromCache(const PathInfo& path,
const UnicodeString& localeName,
ResourceBundleCache* someCache);
static const UHashtable* getFromCacheWithFallback(const PathInfo& path,
const UnicodeString& desiredLocale,
UnicodeString& returnedLocale,
ResourceBundleCache* someCache,
UErrorCode& error);
/**
* Handlers which are passed to parse() have this signature.
*/
typedef void (*Handler)(const UnicodeString& localeName,
UHashtable* hashtable,
void* context,
ResourceBundleCache* someCache);
/**
* Parse a file, storing the resource data in the cache.
*/
static void parse(const PathInfo& path,
const UnicodeString& localeName,
Handler handler,
void* context,
ResourceBundleCache* someCache,
UErrorCode &error);
/**
* If the given file exists and has not been parsed, then parse it (caching the
* resultant data) and return true.
*/
static bool_t parseIfUnparsed(const PathInfo& path,
const UnicodeString& locale,
ResourceBundleCache* fCache,
VisitedFileCache* vCache,
UErrorCode& error);
const UHashtable* getHashtableForLocale(const UnicodeString& localeName,
UnicodeString& returnedLocale,
UErrorCode& err);
const UHashtable* getHashtableForLocale(const UnicodeString& desiredLocale,
UErrorCode& error);
const ResourceBundleData* getDataForTag(const char *tag,
UErrorCode& err) const;
void constructForLocale(const PathInfo& path,
const Locale& locale,
UErrorCode& error);
static void addToCache(const UnicodeString& localeName,
UHashtable* hashtable,
void* context,
ResourceBundleCache* someCache);
static void saveCollationHashtable(const UnicodeString& localeName,
UHashtable* hashtable,
void* context,
ResourceBundleCache* cache);
private:
/**
* This internal class iterates over the fallback and/or default locales. It
* progresses as follows: Specific: language+country+variant language+country
* language Default: language+country+variant language+country language Root:
*/
class LocaleFallbackIterator
{
public:
LocaleFallbackIterator(const UnicodeString& startingLocale,
const UnicodeString& root,
bool_t useDefaultLocale);
const UnicodeString& getLocale(void) const { return fLocale; }
bool_t nextLocale(UErrorCode& status);
private:
void chopLocale(void);
UnicodeString fLocale;
UnicodeString fDefaultLocale;
UnicodeString fRoot;
bool_t fUseDefaultLocale;
bool_t fTriedDefaultLocale;
bool_t fTriedRoot;
};
private:
static const char* kDefaultSuffix;
static const int32_t kDefaultSuffixLen;
static const char* kDefaultFilename;
static const char* kDefaultLocaleName;
static const char* kIndexLocaleName;
static const char* kIndexFilename;
static const char* kIndexTag;
static const char* kDefaultMinorVersion;
static const char* kVersionSeparator;
static const char* kVersionTag;
static ResourceBundleCache* fgUserCache;
static VisitedFileCache* fgUserVisitedFiles;
ResourceBundleCache* fgCache;
VisitedFileCache* fgVisitedFiles;
/**
* Data members. The ResourceBundle object is kept lightweight by having the fData[]
* array entries be non-owned pointers. The cache (fgCache) owns the entries and
* will delete them at static destruction time.
*/
PathInfo fPath;
enum { kDataCount = 4 };
const UHashtable* fData[kDataCount]; // These aren't const if fIsDataOwned is true
bool_t fLoaded[kDataCount];
UErrorCode fDataStatus[kDataCount]; // Returns the appropriate error code for each data table.
bool_t fIsDataOwned;
Locale fRealLocale;
LocaleFallbackIterator* fLocaleIterator;
char* fVersionID;
};
#endif