| /* |
| ******************************************************************************** |
| * Copyright (C) {1997-2004}, International Business Machines Corporation and others. All Rights Reserved. |
| ******************************************************************************** |
| * |
| * File FORMAT.H |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 02/19/97 aliu Converted from java. |
| * 03/17/97 clhuang Updated per C++ implementation. |
| * 03/27/97 helena Updated to pass the simple test after code review. |
| ******************************************************************************** |
| */ |
| // ***************************************************************************** |
| // This file was generated from the java source file Format.java |
| // ***************************************************************************** |
| |
| #ifndef FORMAT_H |
| #define FORMAT_H |
| |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/unistr.h" |
| #include "unicode/fmtable.h" |
| #include "unicode/fieldpos.h" |
| #include "unicode/parsepos.h" |
| #include "unicode/parseerr.h" |
| #include "unicode/locid.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * Base class for all formats. This is an abstract base class which |
| * specifies the protocol for classes which convert other objects or |
| * values, such as numeric values and dates, and their string |
| * representations. In some cases these representations may be |
| * localized or contain localized characters or strings. For example, |
| * a numeric formatter such as DecimalFormat may convert a numeric |
| * value such as 12345 to the string "$12,345". It may also parse |
| * the string back into a numeric value. A date and time formatter |
| * like SimpleDateFormat may represent a specific date, encoded |
| * numerically, as a string such as "Wednesday, February 26, 1997 AD". |
| * <P> |
| * Many of the concrete subclasses of Format employ the notion of |
| * a pattern. A pattern is a string representation of the rules which |
| * govern the interconversion between values and strings. For example, |
| * a DecimalFormat object may be associated with the pattern |
| * "$#,##0.00;($#,##0.00)", which is a common US English format for |
| * currency values, yielding strings such as "$1,234.45" for 1234.45, |
| * and "($987.65)" for 987.6543. The specific syntax of a pattern |
| * is defined by each subclass. |
| * <P> |
| * Even though many subclasses use patterns, the notion of a pattern |
| * is not inherent to Format classes in general, and is not part of |
| * the explicit base class protocol. |
| * <P> |
| * Two complex formatting classes bear mentioning. These are |
| * MessageFormat and ChoiceFormat. ChoiceFormat is a subclass of |
| * NumberFormat which allows the user to format different number ranges |
| * as strings. For instance, 0 may be represented as "no files", 1 as |
| * "one file", and any number greater than 1 as "many files". |
| * MessageFormat is a formatter which utilizes other Format objects to |
| * format a string containing with multiple values. For instance, |
| * A MessageFormat object might produce the string "There are no files |
| * on the disk MyDisk on February 27, 1997." given the arguments 0, |
| * "MyDisk", and the date value of 2/27/97. See the ChoiceFormat |
| * and MessageFormat headers for further information. |
| * <P> |
| * If formatting is unsuccessful, a failing UErrorCode is returned when |
| * the Format cannot format the type of object, otherwise if there is |
| * something illformed about the the Unicode replacement character |
| * 0xFFFD is returned. |
| * <P> |
| * If there is no match when parsing, a parse failure UErrorCode is |
| * retured for methods which take no ParsePosition. For the method |
| * that takes a ParsePosition, the index parameter is left unchanged. |
| * <P> |
| * <em>User subclasses are not supported.</em> While clients may write |
| * subclasses, such code will not necessarily work and will not be |
| * guaranteed to work stably from release to release. |
| */ |
| class U_I18N_API Format : public UObject { |
| public: |
| |
| /** Destructor |
| * @stable ICU 2.4 |
| */ |
| virtual ~Format(); |
| |
| /** |
| * Return true if the given Format objects are semantically equal. |
| * Objects of different subclasses are considered unequal. |
| * @param other the object to be compared with. |
| * @return Return true if the given Format objects are semantically equal. |
| * Objects of different subclasses are considered unequal. |
| * @stable ICU 2.0 |
| */ |
| virtual UBool operator==(const Format& other) const = 0; |
| |
| /** |
| * Return true if the given Format objects are not semantically |
| * equal. |
| * @param other the object to be compared with. |
| * @return Return true if the given Format objects are not semantically. |
| * @stable ICU 2.0 |
| */ |
| UBool operator!=(const Format& 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 2.0 |
| */ |
| virtual Format* clone() const = 0; |
| |
| /** |
| * Formats an object to produce a string. |
| * |
| * @param obj The object to format. |
| * @param appendTo Output parameter to receive result. |
| * Result is appended to existing contents. |
| * @param status Output parameter filled in with success or failure status. |
| * @return Reference to 'appendTo' parameter. |
| * @stable ICU 2.0 |
| */ |
| UnicodeString& format(const Formattable& obj, |
| UnicodeString& appendTo, |
| UErrorCode& status) const; |
| |
| /** |
| * Format an object to produce a string. This is a pure virtual method which |
| * subclasses must implement. This method allows polymorphic formatting |
| * of Formattable objects. If a subclass of Format receives a Formattable |
| * object type it doesn't handle (e.g., if a numeric Formattable is passed |
| * to a DateFormat object) then it returns a failing UErrorCode. |
| * |
| * @param obj The object to format. |
| * @param appendTo Output parameter to receive result. |
| * Result is appended to existing contents. |
| * @param pos On input: an alignment field, if desired. |
| * On output: the offsets of the alignment field. |
| * @param status Output param filled with success/failure status. |
| * @return Reference to 'appendTo' parameter. |
| * @stable ICU 2.0 |
| */ |
| virtual UnicodeString& format(const Formattable& obj, |
| UnicodeString& appendTo, |
| FieldPosition& pos, |
| UErrorCode& status) const = 0; |
| |
| /** |
| * Parse a string to produce an object. This is a pure virtual |
| * method which subclasses must implement. This method allows |
| * polymorphic parsing of strings into Formattable objects. |
| * <P> |
| * Before calling, set parse_pos.index to the offset you want to |
| * start parsing at in the source. After calling, parse_pos.index |
| * is the end of the text you parsed. If error occurs, index is |
| * unchanged. |
| * <P> |
| * When parsing, leading whitespace is discarded (with successful |
| * parse), while trailing whitespace is left as is. |
| * <P> |
| * Example: |
| * <P> |
| * Parsing "_12_xy" (where _ represents a space) for a number, |
| * with index == 0 will result in the number 12, with |
| * parse_pos.index updated to 3 (just before the second space). |
| * Parsing a second time will result in a failing UErrorCode since |
| * "xy" is not a number, and leave index at 3. |
| * <P> |
| * Subclasses will typically supply specific parse methods that |
| * return different types of values. Since methods can't overload |
| * on return types, these will typically be named "parse", while |
| * this polymorphic method will always be called parseObject. Any |
| * parse method that does not take a parse_pos should set status |
| * to an error value when no text in the required format is at the |
| * start position. |
| * |
| * @param source The string to be parsed into an object. |
| * @param result Formattable to be set to the parse result. |
| * If parse fails, return contents are undefined. |
| * @param parse_pos The position to start parsing at. Upon return |
| * this param is set to the position after the |
| * last character successfully parsed. If the |
| * source is not parsed successfully, this param |
| * will remain unchanged. |
| * @stable ICU 2.0 |
| */ |
| virtual void parseObject(const UnicodeString& source, |
| Formattable& result, |
| ParsePosition& parse_pos) const = 0; |
| |
| /** |
| * Parses a string to produce an object. This is a convenience method |
| * which calls the pure virtual parseObject() method, and returns a |
| * failure UErrorCode if the ParsePosition indicates failure. |
| * |
| * @param source The string to be parsed into an object. |
| * @param result Formattable to be set to the parse result. |
| * If parse fails, return contents are undefined. |
| * @param status Output param to be filled with success/failure |
| * result code. |
| * @stable ICU 2.0 |
| */ |
| void parseObject(const UnicodeString& source, |
| Formattable& result, |
| UErrorCode& status) const; |
| |
| /** |
| * Returns a unique class ID POLYMORPHICALLY. Pure virtual method. |
| * This method is to implement a simple version of RTTI, since not all |
| * C++ compilers support genuine RTTI. Polymorphic operator==() and |
| * clone() methods call this method. |
| * Concrete subclasses of Format must implement getDynamicClassID() |
| * |
| * @return The class ID for this object. All objects of a |
| * given class have the same class ID. Objects of |
| * other classes have different class IDs. |
| * @stable ICU 2.0 |
| */ |
| virtual UClassID getDynamicClassID() const = 0; |
| |
| /** Get the locale for this format object. You can choose between valid and actual locale. |
| * @param type type of the locale we're looking for (valid or actual) |
| * @param status error code for the operation |
| * @return the locale |
| * @draft ICU 2.8 likely to change in ICU 3.0, based on feedback |
| */ |
| Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const; |
| |
| /** Get the locale for this format object. You can choose between valid and actual locale. |
| * @param type type of the locale we're looking for (valid or actual) |
| * @param status error code for the operation |
| * @return the locale |
| * @internal |
| */ |
| const char* getLocaleID(ULocDataLocaleType type, UErrorCode &status) const; |
| |
| protected: |
| /** @draft ICU 2.8 */ |
| void setLocaleIDs(const char* valid, const char* actual); |
| |
| protected: |
| /** |
| * Default constructor for subclass use only. Does nothing. |
| * @stable ICU 2.0 |
| */ |
| Format(); |
| |
| /** |
| * @stable ICU 2.0 |
| */ |
| Format(const Format&); // Does nothing; for subclasses only |
| |
| /** |
| * @stable ICU 2.0 |
| */ |
| Format& operator=(const Format&); // Does nothing; for subclasses |
| |
| |
| /** |
| * Simple function for initializing a UParseError from a UnicodeString. |
| * |
| * @param pattern The pattern to copy into the parseError |
| * @param pos The position in pattern where the error occured |
| * @param parseError The UParseError object to fill in |
| * @stable ICU 2.4 |
| */ |
| static void syntaxError(const UnicodeString& pattern, |
| int32_t pos, |
| UParseError& parseError); |
| |
| private: |
| char actualLocale[ULOC_FULLNAME_CAPACITY]; |
| char validLocale[ULOC_FULLNAME_CAPACITY]; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif /* #if !UCONFIG_NO_FORMATTING */ |
| |
| #endif // _FORMAT |
| //eof |
