/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
*
* Distributable under the terms of either the Apache License (Version 2.0) or
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
#ifndef _lucene_analysis_standard_StandardTokenizer
#define _lucene_analysis_standard_StandardTokenizer
#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif
#include "CLucene/analysis/AnalysisHeader.h"
#include "CLucene/analysis/Analyzers.h"
#include "CLucene/analysis/standard/StandardTokenizerConstants.h"
#include "clucene/util/stringbuffer.h"
#include "CLucene/util/FastCharStream.h"
#include "CLucene/util/Reader.h"
CL_NS_DEF2(analysis,standard)
/** A grammar-based tokenizer constructed with JavaCC.
*
* <p> This should be a good tokenizer for most European-language documents:
*
* <ul>
* <li>Splits words at punctuation characters, removing punctuation. However, a
* dot that's not followed by whitespace is considered part of a token.
* <li>Splits words at hyphens, unless there's a number in the token, in which case
* the whole token is interpreted as a product number and is not split.
* <li>Recognizes email addresses and internet hostnames as one token.
* </ul>
*
* <p>Many applications have specific tokenizer needs. If this tokenizer does
* not suit your application, please consider copying this source code
* directory to your project and maintaining your own grammar-based tokenizer.
*/
class StandardTokenizer: public Tokenizer {
private:
int32_t rdPos;
int32_t tokenStart;
// Advance by one character, incrementing rdPos and returning the character.
int readChar();
// Retreat by one character, decrementing rdPos.
void unReadChar();
// createToken centralizes token creation for auditing purposes.
//Token* createToken(CL_NS(util)::StringBuffer* sb, TokenTypes tokenCode);
inline bool setToken(Token* t, CL_NS(util)::StringBuffer* sb, TokenTypes tokenCode);
bool ReadDotted(CL_NS(util)::StringBuffer* str, TokenTypes forcedType,Token* t);
public:
CL_NS(util)::FastCharStream* rd;
// Constructs a tokenizer for this Reader.
StandardTokenizer(CL_NS(util)::Reader* reader);
~StandardTokenizer();
/** Returns the next token in the stream, or false at end-of-stream.
* The returned token's type is set to an element of
* StandardTokenizerConstants::tokenImage. */
bool next(Token* token);
// Reads for number like "1"/"1234.567", or IP address like "192.168.1.2".
bool ReadNumber(const TCHAR* previousNumber, const TCHAR prev, Token* t);
bool ReadAlphaNum(const TCHAR prev, Token* t);
// Reads for apostrophe-containing word.
bool ReadApostrophe(CL_NS(util)::StringBuffer* str, Token* t);
// Reads for something@... it may be a COMPANY name or a EMAIL address
bool ReadAt(CL_NS(util)::StringBuffer* str, Token* t);
// Reads for COMPANY name like AT&T.
bool ReadCompany(CL_NS(util)::StringBuffer* str, Token* t);
// Reads CJK characters
bool ReadCJK(const TCHAR prev, Token* t);
// CHANGED Thai support ->
// Reads CJK characters
bool ReadThai(const TCHAR prev, Token* t);
// CHANGED Thai support
};
CL_NS_END2
#endif