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number_asformat.h (3657B)

      1 // © 2017 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 
      4 #include "unicode/utypes.h"
      5 
      6 #if !UCONFIG_NO_FORMATTING
      7 #ifndef __NUMBER_ASFORMAT_H__
      8 #define __NUMBER_ASFORMAT_H__
      9 
     10 #include "unicode/numberformatter.h"
     11 #include "number_types.h"
     12 #include "number_decimalquantity.h"
     13 #include "number_scientific.h"
     14 #include "number_patternstring.h"
     15 #include "number_modifiers.h"
     16 #include "number_multiplier.h"
     17 #include "number_roundingutils.h"
     18 #include "decNumber.h"
     19 #include "charstr.h"
     20 
     21 U_NAMESPACE_BEGIN
     22 namespace number::impl {
     23 
     24 /**
     25 * A wrapper around LocalizedNumberFormatter implementing the Format interface, enabling improved
     26 * compatibility with other APIs.
     27 *
     28 * @see NumberFormatter
     29 */
     30 class U_I18N_API_CLASS LocalizedNumberFormatterAsFormat : public Format {
     31  public:
     32    U_I18N_API LocalizedNumberFormatterAsFormat(const LocalizedNumberFormatter& formatter,
     33                                                const Locale& locale);
     34 
     35    /**
     36     * Destructor.
     37     */
     38    U_I18N_API ~LocalizedNumberFormatterAsFormat() override;
     39 
     40    /**
     41     * Equals operator.
     42     */
     43    U_I18N_API bool operator==(const Format& other) const override;
     44 
     45    /**
     46     * Creates a copy of this object.
     47     */
     48    U_I18N_API LocalizedNumberFormatterAsFormat* clone() const override;
     49 
     50    /**
     51     * Formats a Number using the wrapped LocalizedNumberFormatter. The provided formattable must be a
     52     * number type.
     53     */
     54    U_I18N_API UnicodeString& format(const Formattable& obj,
     55                                     UnicodeString& appendTo,
     56                                     FieldPosition& pos,
     57                                     UErrorCode& status) const override;
     58 
     59    /**
     60     * Formats a Number using the wrapped LocalizedNumberFormatter. The provided formattable must be a
     61     * number type.
     62     */
     63    U_I18N_API UnicodeString& format(const Formattable& obj,
     64                                     UnicodeString& appendTo,
     65                                     FieldPositionIterator* posIter,
     66                                     UErrorCode& status) const override;
     67 
     68    /**
     69     * Not supported: sets an error index and returns.
     70     */
     71    U_I18N_API void parseObject(const UnicodeString& source,
     72                                Formattable& result,
     73                                ParsePosition& parse_pos) const override;
     74 
     75    /**
     76     * Gets the LocalizedNumberFormatter that this wrapper class uses to format numbers.
     77     *
     78     * For maximum efficiency, this function returns by const reference. You must copy the return value
     79     * into a local variable if you want to use it beyond the lifetime of the current object:
     80     *
     81     * <pre>
     82     * LocalizedNumberFormatter localFormatter = fmt->getNumberFormatter();
     83     * </pre>
     84     *
     85     * You can however use the return value directly when chaining:
     86     *
     87     * <pre>
     88     * FormattedNumber result = fmt->getNumberFormatter().formatDouble(514.23, status);
     89     * </pre>
     90     *
     91     * @return The unwrapped LocalizedNumberFormatter.
     92     */
     93    U_I18N_API const LocalizedNumberFormatter& getNumberFormatter() const;
     94 
     95    U_I18N_API UClassID getDynamicClassID() const override;
     96    U_I18N_API static UClassID getStaticClassID();
     97 
     98  private:
     99    LocalizedNumberFormatter fFormatter;
    100 
    101    // Even though the locale is inside the LocalizedNumberFormatter, we have to keep it here, too, because
    102    // LocalizedNumberFormatter doesn't have a getLocale() method, and ICU-TC didn't want to add one.
    103    Locale fLocale;
    104 };
    105 
    106 } // namespace number::impl
    107 U_NAMESPACE_END
    108 
    109 #endif // __NUMBER_ASFORMAT_H__
    110 
    111 #endif /* #if !UCONFIG_NO_FORMATTING */