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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/**
*******************************************************************************
* Copyright (C) 2006-2014, International Business Machines Corporation *
* and others. All Rights Reserved. *
*******************************************************************************
*/
#ifndef DICTBE_H
#define DICTBE_H
#include "unicode/utypes.h"
#include "unicode/uniset.h"
#include "unicode/utext.h"
#include "brkeng.h"
#include "hash.h"
#include "uvectr32.h"
U_NAMESPACE_BEGIN
class DictionaryMatcher;
class Normalizer2;
/*******************************************************************
* DictionaryBreakEngine
*/
/**
* <p>DictionaryBreakEngine is a kind of LanguageBreakEngine that uses a
* dictionary to determine language-specific breaks.</p>
*
* <p>After it is constructed a DictionaryBreakEngine may be shared between
* threads without synchronization.</p>
*/
class DictionaryBreakEngine : public LanguageBreakEngine {
private:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fSet;
public:
/**
* <p>Constructor </p>
*/
DictionaryBreakEngine();
/**
* <p>Virtual destructor.</p>
*/
virtual ~DictionaryBreakEngine();
/**
* <p>Indicate whether this engine handles a particular character for
* a particular kind of break.</p>
*
* @param c A character which begins a run that the engine might handle
* @return true if this engine handles the particular character and break
* type.
*/
virtual UBool handles(UChar32 c) const override;
/**
* <p>Find any breaks within a run in the supplied text.</p>
*
* @param text A UText representing the text. The iterator is left at
* the end of the run of characters which the engine is capable of handling
* that starts from the first character in the range.
* @param startPos The start of the run within the supplied text.
* @param endPos The end of the run within the supplied text.
* @param foundBreaks vector of int32_t to receive the break positions
* @param status Information on any errors encountered.
* @return The number of breaks found.
*/
virtual int32_t findBreaks( UText *text,
int32_t startPos,
int32_t endPos,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status ) const override;
protected:
/**
* <p>Set the character set handled by this engine.</p>
*
* @param set A UnicodeSet of the set of characters handled by the engine
*/
virtual void setCharacters( const UnicodeSet &set );
/**
* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const = 0;
};
/*******************************************************************
* ThaiBreakEngine
*/
/**
* <p>ThaiBreakEngine is a kind of DictionaryBreakEngine that uses a
* dictionary and heuristics to determine Thai-specific breaks.</p>
*
* <p>After it is constructed a ThaiBreakEngine may be shared between
* threads without synchronization.</p>
*/
class ThaiBreakEngine : public DictionaryBreakEngine {
private:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fEndWordSet;
UnicodeSet fBeginWordSet;
UnicodeSet fSuffixSet;
UnicodeSet fMarkSet;
DictionaryMatcher *fDictionary;
public:
/**
* <p>Default constructor.</p>
*
* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
* engine is deleted.
*/
ThaiBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
/**
* <p>Virtual destructor.</p>
*/
virtual ~ThaiBreakEngine();
protected:
/**
* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const override;
};
/*******************************************************************
* LaoBreakEngine
*/
/**
* <p>LaoBreakEngine is a kind of DictionaryBreakEngine that uses a
* dictionary and heuristics to determine Lao-specific breaks.</p>
*
* <p>After it is constructed a LaoBreakEngine may be shared between
* threads without synchronization.</p>
*/
class LaoBreakEngine : public DictionaryBreakEngine {
private:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fEndWordSet;
UnicodeSet fBeginWordSet;
UnicodeSet fMarkSet;
DictionaryMatcher *fDictionary;
public:
/**
* <p>Default constructor.</p>
*
* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
* engine is deleted.
*/
LaoBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
/**
* <p>Virtual destructor.</p>
*/
virtual ~LaoBreakEngine();
protected:
/**
* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const override;
};
/*******************************************************************
* BurmeseBreakEngine
*/
/**
* <p>BurmeseBreakEngine is a kind of DictionaryBreakEngine that uses a
* DictionaryMatcher and heuristics to determine Burmese-specific breaks.</p>
*
* <p>After it is constructed a BurmeseBreakEngine may be shared between
* threads without synchronization.</p>
*/
class BurmeseBreakEngine : public DictionaryBreakEngine {
private:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fEndWordSet;
UnicodeSet fBeginWordSet;
UnicodeSet fMarkSet;
DictionaryMatcher *fDictionary;
public:
/**
* <p>Default constructor.</p>
*
* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
* engine is deleted.
*/
BurmeseBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
/**
* <p>Virtual destructor.</p>
*/
virtual ~BurmeseBreakEngine();
protected:
/**
* <p>Divide up a range of known dictionary characters.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const override;
};
/*******************************************************************
* KhmerBreakEngine
*/
/**
* <p>KhmerBreakEngine is a kind of DictionaryBreakEngine that uses a
* DictionaryMatcher and heuristics to determine Khmer-specific breaks.</p>
*
* <p>After it is constructed a KhmerBreakEngine may be shared between
* threads without synchronization.</p>
*/
class KhmerBreakEngine : public DictionaryBreakEngine {
private:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fEndWordSet;
UnicodeSet fBeginWordSet;
UnicodeSet fMarkSet;
DictionaryMatcher *fDictionary;
public:
/**
* <p>Default constructor.</p>
*
* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
* engine is deleted.
*/
KhmerBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
/**
* <p>Virtual destructor.</p>
*/
virtual ~KhmerBreakEngine();
protected:
/**
* <p>Divide up a range of known dictionary characters.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const override;
};
#if !UCONFIG_NO_NORMALIZATION
/*******************************************************************
* CjkBreakEngine
*/
//indicates language/script that the CjkBreakEngine will handle
enum LanguageType {
kKorean,
kChineseJapanese
};
/**
* <p>CjkBreakEngine is a kind of DictionaryBreakEngine that uses a
* dictionary with costs associated with each word and
* Viterbi decoding to determine CJK-specific breaks.</p>
*/
class CjkBreakEngine : public DictionaryBreakEngine {
protected:
/**
* The set of characters handled by this engine
* @internal
*/
UnicodeSet fHangulWordSet;
UnicodeSet fDigitOrOpenPunctuationOrAlphabetSet;
UnicodeSet fClosePunctuationSet;
DictionaryMatcher *fDictionary;
const Normalizer2 *nfkcNorm2;
private:
// Load Japanese extensions.
void loadJapaneseExtensions(UErrorCode& error);
// Load Japanese Hiragana.
void loadHiragana(UErrorCode& error);
// Initialize fSkipSet by loading Japanese Hiragana and extensions.
void initJapanesePhraseParameter(UErrorCode& error);
Hashtable fSkipSet;
public:
/**
* <p>Default constructor.</p>
*
* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
* engine is deleted. The DictionaryMatcher must contain costs for each word
* in order for the dictionary to work properly.
*/
CjkBreakEngine(DictionaryMatcher *adoptDictionary, LanguageType type, UErrorCode &status);
/**
* <p>Virtual destructor.</p>
*/
virtual ~CjkBreakEngine();
protected:
/**
* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
*
* @param text A UText representing the text
* @param rangeStart The start of the range of dictionary characters
* @param rangeEnd The end of the range of dictionary characters
* @param foundBreaks Output of C array of int32_t break positions, or 0
* @param status Information on any errors encountered.
* @return The number of breaks found
*/
virtual int32_t divideUpDictionaryRange( UText *text,
int32_t rangeStart,
int32_t rangeEnd,
UVector32 &foundBreaks,
UBool isPhraseBreaking,
UErrorCode& status) const override;
};
#endif
U_NAMESPACE_END
/* DICTBE_H */
#endif
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