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/*
*******************************************************************************
* Copyright (C) 2007-2011, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
* File DTPTNGEN.H
*
*******************************************************************************
*/
#ifndef __DTPTNGEN_H__
#define __DTPTNGEN_H__
#include "unicode/datefmt.h"
#include "unicode/locid.h"
#include "unicode/udat.h"
#include "unicode/udatpg.h"
U_NAMESPACE_BEGIN
/**
* \file
* \brief C++ API: Date/Time Pattern Generator
*/
class Hashtable;
class FormatParser;
class DateTimeMatcher;
class DistanceInfo;
class PatternMap;
class PtnSkeleton;
/**
* This class provides flexible generation of date format patterns, like "yy-MM-dd".
* The user can build up the generator by adding successive patterns. Once that
* is done, a query can be made using a "skeleton", which is a pattern which just
* includes the desired fields and lengths. The generator will return the "best fit"
* pattern corresponding to that skeleton.
* <p>The main method people will use is getBestPattern(String skeleton),
* since normally this class is pre-built with data from a particular locale.
* However, generators can be built directly from other data as well.
* <p><i>Issue: may be useful to also have a function that returns the list of
* fields in a pattern, in order, since we have that internally.
* That would be useful for getting the UI order of field elements.</i>
* @stable ICU 3.8
**/
class U_I18N_API DateTimePatternGenerator : public UObject {
public:
/**
* Construct a flexible generator according to default locale.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createInstance(UErrorCode& status);
/**
* Construct a flexible generator according to data for a given locale.
* @param uLocale
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createInstance(const Locale& uLocale, UErrorCode& status);
/**
* Create an empty generator, to be constructed with addPattern(...) etc.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createEmptyInstance(UErrorCode& status);
/**
* Destructor.
* @stable ICU 3.8
*/
virtual ~DateTimePatternGenerator();
/**
* Clone DateTimePatternGenerator object. Clients are responsible for
* deleting the DateTimePatternGenerator object cloned.
* @stable ICU 3.8
*/
DateTimePatternGenerator* clone() const;
/**
* Return true if another object is semantically equal to this one.
*
* @param other the DateTimePatternGenerator object to be compared with.
* @return true if other is semantically equal to this.
* @stable ICU 3.8
*/
UBool operator==(const DateTimePatternGenerator& other) const;
/**
* Return true if another object is semantically unequal to this one.
*
* @param other the DateTimePatternGenerator object to be compared with.
* @return true if other is semantically unequal to this.
* @stable ICU 3.8
*/
UBool operator!=(const DateTimePatternGenerator& other) const;
/**
* Utility to return a unique skeleton from a given pattern. For example,
* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return skeleton such as "MMMdd"
* @stable ICU 3.8
*/
UnicodeString getSkeleton(const UnicodeString& pattern, UErrorCode& status);
/**
* Utility to return a unique base skeleton from a given pattern. This is
* the same as the skeleton, except that differences in length are minimized
* so as to only preserve the difference between string and numeric form. So
* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
* (notice the single d).
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return base skeleton, such as "Md"
* @stable ICU 3.8
*/
UnicodeString getBaseSkeleton(const UnicodeString& pattern, UErrorCode& status);
/**
* Adds a pattern to the generator. If the pattern has the same skeleton as
* an existing pattern, and the override parameter is set, then the previous
* value is overriden. Otherwise, the previous value is retained. In either
* case, the conflicting status is set and previous vale is stored in
* conflicting pattern.
* <p>
* Note that single-field patterns (like "MMM") are automatically added, and
* don't need to be added explicitly!
*
* @param pattern Input pattern, such as "dd/MMM"
* @param override When existing values are to be overridden use true,
* otherwise use false.
* @param conflictingPattern Previous pattern with the same skeleton.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return conflicting status. The value could be UDATPG_NO_CONFLICT,
* UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
* @stable ICU 3.8
*/
UDateTimePatternConflict addPattern(const UnicodeString& pattern,
UBool override,
UnicodeString& conflictingPattern,
UErrorCode& status);
/**
* An AppendItem format is a pattern used to append a field if there is no
* good match. For example, suppose that the input skeleton is "GyyyyMMMd",
* and there is no matching pattern internally, but there is a pattern
* matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
* G. The way these two are conjoined is by using the AppendItemFormat for G
* (era). So if that value is, say "{0}, {1}" then the final resulting
* pattern is "d-MM-yyyy, G".
* <p>
* There are actually three available variables: {0} is the pattern so far,
* {1} is the element we are adding, and {2} is the name of the element.
* <p>
* This reflects the way that the CLDR data is organized.
*
* @param field such as UDATPG_ERA_FIELD.
* @param value pattern, such as "{0}, {1}"
* @stable ICU 3.8
*/
void setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value);
/**
* Getter corresponding to setAppendItemFormat. Values below 0 or at or
* above UDATPG_FIELD_COUNT are illegal arguments.
*
* @param field such as UDATPG_ERA_FIELD.
* @return append pattern for field
* @stable ICU 3.8
*/
const UnicodeString& getAppendItemFormat(UDateTimePatternField field) const;
/**
* Sets the names of field, eg "era" in English for ERA. These are only
* used if the corresponding AppendItemFormat is used, and if it contains a
* {2} variable.
* <p>
* This reflects the way that the CLDR data is organized.
*
* @param field such as UDATPG_ERA_FIELD.
* @param value name of the field
* @stable ICU 3.8
*/
void setAppendItemName(UDateTimePatternField field, const UnicodeString& value);
/**
* Getter corresponding to setAppendItemNames. Values below 0 or at or above
* UDATPG_FIELD_COUNT are illegal arguments.
*
* @param field such as UDATPG_ERA_FIELD.
* @return name for field
* @stable ICU 3.8
*/
const UnicodeString& getAppendItemName(UDateTimePatternField field) const;
/**
* The date time format is a message format pattern used to compose date and
* time patterns. The default value is "{0} {1}", where {0} will be replaced
* by the date pattern and {1} will be replaced by the time pattern.
* <p>
* This is used when the input skeleton contains both date and time fields,
* but there is not a close match among the added patterns. For example,
* suppose that this object was created by adding "dd-MMM" and "hh:mm", and
* its datetimeFormat is the default "{0} {1}". Then if the input skeleton
* is "MMMdhmm", there is not an exact match, so the input skeleton is
* broken up into two components "MMMd" and "hmm". There are close matches
* for those two skeletons, so the result is put together with this pattern,
* resulting in "d-MMM h:mm".
*
* @param dateTimeFormat
* message format pattern, here {0} will be replaced by the date
* pattern and {1} will be replaced by the time pattern.
* @stable ICU 3.8
*/
void setDateTimeFormat(const UnicodeString& dateTimeFormat);
/**
* Getter corresponding to setDateTimeFormat.
* @return DateTimeFormat.
* @stable ICU 3.8
*/
const UnicodeString& getDateTimeFormat() const;
/**
* Return the best pattern matching the input skeleton. It is guaranteed to
* have all of the fields in the skeleton.
*
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return bestPattern
* The best pattern found from the given skeleton.
* @stable ICU 3.8
*/
UnicodeString getBestPattern(const UnicodeString& skeleton, UErrorCode& status);
/**
* Return the best pattern matching the input skeleton. It is guaranteed to
* have all of the fields in the skeleton.
*
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param options
* Options for forcing the length of specified fields in the
* returned pattern to match those in the skeleton (when this
* would not happen otherwise). For default behavior, use
* UDATPG_MATCH_NO_OPTIONS.
* @param status
* Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return bestPattern
* The best pattern found from the given skeleton.
* @stable ICU 4.4
*/
UnicodeString getBestPattern(const UnicodeString& skeleton,
UDateTimePatternMatchOptions options,
UErrorCode& status);
/**
* Adjusts the field types (width and subtype) of a pattern to match what is
* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
* "dd-MMMM hh:mm". This is used internally to get the best match for the
* input skeleton, but can also be used externally.
*
* @param pattern Input pattern
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return pattern adjusted to match the skeleton fields widths and subtypes.
* @stable ICU 3.8
*/
UnicodeString replaceFieldTypes(const UnicodeString& pattern,
const UnicodeString& skeleton,
UErrorCode& status);
/**
* Adjusts the field types (width and subtype) of a pattern to match what is
* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
* "dd-MMMM hh:mm". This is used internally to get the best match for the
* input skeleton, but can also be used externally.
*
* @param pattern Input pattern
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param options
* Options controlling whether the length of specified fields in the
* pattern are adjusted to match those in the skeleton (when this
* would not happen otherwise). For default behavior, use
* UDATPG_MATCH_NO_OPTIONS.
* @param status
* Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return pattern adjusted to match the skeleton fields widths and subtypes.
* @stable ICU 4.4
*/
UnicodeString replaceFieldTypes(const UnicodeString& pattern,
const UnicodeString& skeleton,
UDateTimePatternMatchOptions options,
UErrorCode& status);
/**
* Return a list of all the skeletons (in canonical form) from this class.
*
* Call getPatternForSkeleton() to get the corresponding pattern.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return StringEnumeration with the skeletons.
* The caller must delete the object.
* @stable ICU 3.8
*/
StringEnumeration* getSkeletons(UErrorCode& status) const;
/**
* Get the pattern corresponding to a given skeleton.
* @param skeleton
* @return pattern corresponding to a given skeleton.
* @stable ICU 3.8
*/
const UnicodeString& getPatternForSkeleton(const UnicodeString& skeleton) const;
/**
* Return a list of all the base skeletons (in canonical form) from this class.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return a StringEnumeration with the base skeletons.
* The caller must delete the object.
* @stable ICU 3.8
*/
StringEnumeration* getBaseSkeletons(UErrorCode& status) const;
#ifndef U_HIDE_INTERNAL_API
/**
* Return a list of redundant patterns are those which if removed, make no
* difference in the resulting getBestPattern values. This method returns a
* list of them, to help check the consistency of the patterns used to build
* this generator.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return a StringEnumeration with the redundant pattern.
* The caller must delete the object.
* @internal ICU 3.8
*/
StringEnumeration* getRedundants(UErrorCode& status);
#endif /* U_HIDE_INTERNAL_API */
/**
* The decimal value is used in formatting fractions of seconds. If the
* skeleton contains fractional seconds, then this is used with the
* fractional seconds. For example, suppose that the input pattern is
* "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and
* the decimal string is ",". Then the resulting pattern is modified to be
* "H:mm:ss,SSSS"
*
* @param decimal
* @stable ICU 3.8
*/
void setDecimal(const UnicodeString& decimal);
/**
* Getter corresponding to setDecimal.
* @return UnicodeString corresponding to the decimal point
* @stable ICU 3.8
*/
const UnicodeString& getDecimal() const;
/**
* ICU "poor man's RTTI", returns a UClassID for the actual class.
*
* @stable ICU 3.8
*/
virtual UClassID getDynamicClassID() const;
/**
* ICU "poor man's RTTI", returns a UClassID for this class.
*
* @stable ICU 3.8
*/
static UClassID U_EXPORT2 getStaticClassID(void);
private:
/**
* Constructor.
* @stable ICU 3.8
*/
DateTimePatternGenerator(UErrorCode & status);
/**
* Constructor.
* @stable ICU 3.8
*/
DateTimePatternGenerator(const Locale& locale, UErrorCode & status);
/**
* Copy constructor.
* @param other DateTimePatternGenerator to copy
* @stable ICU 3.8
*/
DateTimePatternGenerator(const DateTimePatternGenerator& other);
/**
* Default assignment operator.
* @param other DateTimePatternGenerator to copy
* @stable ICU 3.8
*/
DateTimePatternGenerator& operator=(const DateTimePatternGenerator& other);
Locale pLocale; // pattern locale
FormatParser *fp;
DateTimeMatcher* dtMatcher;
DistanceInfo *distanceInfo;
PatternMap *patternMap;
UnicodeString appendItemFormats[UDATPG_FIELD_COUNT];
UnicodeString appendItemNames[UDATPG_FIELD_COUNT];
UnicodeString dateTimeFormat;
UnicodeString decimal;
DateTimeMatcher *skipMatcher;
Hashtable *fAvailableFormatKeyHash;
UnicodeString hackPattern;
UnicodeString emptyString;
UChar fDefaultHourFormatChar;
void initData(const Locale &locale, UErrorCode &status);
void addCanonicalItems();
void addICUPatterns(const Locale& locale, UErrorCode& status);
void hackTimes(const UnicodeString& hackPattern, UErrorCode& status);
void addCLDRData(const Locale& locale, UErrorCode& status);
UDateTimePatternConflict addPatternWithSkeleton(const UnicodeString& pattern, const UnicodeString * skeletonToUse, UBool override, UnicodeString& conflictingPattern, UErrorCode& status);
void initHashtable(UErrorCode& status);
void setDateTimeFromCalendar(const Locale& locale, UErrorCode& status);
void setDecimalSymbols(const Locale& locale, UErrorCode& status);
UDateTimePatternField getAppendFormatNumber(const char* field) const;
UDateTimePatternField getAppendNameNumber(const char* field) const;
void getAppendName(UDateTimePatternField field, UnicodeString& value);
int32_t getCanonicalIndex(const UnicodeString& field);
const UnicodeString* getBestRaw(DateTimeMatcher& source, int32_t includeMask, DistanceInfo* missingFields, const PtnSkeleton** specifiedSkeletonPtr = 0);
UnicodeString adjustFieldTypes(const UnicodeString& pattern, const PtnSkeleton* specifiedSkeleton, UBool fixFractionalSeconds, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
UnicodeString getBestAppending(int32_t missingFields, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
int32_t getTopBitNumber(int32_t foundMask);
void setAvailableFormat(const UnicodeString &key, UErrorCode& status);
UBool isAvailableFormatSet(const UnicodeString &key) const;
void copyHashtable(Hashtable *other, UErrorCode &status);
UBool isCanonicalItem(const UnicodeString& item) const;
} ;// end class DateTimePatternGenerator
U_NAMESPACE_END
#endif