/usr/include/xapian/termgenerator.h is in libxapian-dev 1.2.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | /** @file termgenerator.h
* @brief parse free text and generate terms
*/
/* Copyright (C) 2007,2009,2011 Olly Betts
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef XAPIAN_INCLUDED_TERMGENERATOR_H
#define XAPIAN_INCLUDED_TERMGENERATOR_H
#include <xapian/base.h>
#include <xapian/types.h>
#include <xapian/unicode.h>
#include <xapian/visibility.h>
#include <string>
namespace Xapian {
class Document;
class Stem;
class Stopper;
class WritableDatabase;
/** Parses a piece of text and generate terms.
*
* This module takes a piece of text and parses it to produce words which are
* then used to generate suitable terms for indexing. The terms generated are
* suitable for use with Query objects produced by the QueryParser class.
*/
class XAPIAN_VISIBILITY_DEFAULT TermGenerator {
public:
/// @private @internal Class representing the TermGenerator internals.
class Internal;
/// @private @internal Reference counted internals.
Xapian::Internal::RefCntPtr<Internal> internal;
/// Copy constructor.
TermGenerator(const TermGenerator & o);
/// Assignment.
TermGenerator & operator=(const TermGenerator & o);
/// Default constructor.
TermGenerator();
/// Destructor.
~TermGenerator();
/// Set the Xapian::Stem object to be used for generating stemmed terms.
void set_stemmer(const Xapian::Stem & stemmer);
/** Set the Xapian::Stopper object to be used for identifying stopwords.
*
* Stemmed forms of stopwords aren't indexed, but unstemmed forms still
* are so that searches for phrases including stop words still work.
*
* @param stop The Stopper object to set (default NULL, which means no
* stopwords).
*/
void set_stopper(const Xapian::Stopper *stop = NULL);
/// Set the current document.
void set_document(const Xapian::Document & doc);
/// Get the current document.
const Xapian::Document & get_document() const;
/// Set the database to index spelling data to.
void set_database(const Xapian::WritableDatabase &db);
/// Flags to OR together and pass to TermGenerator::set_flags().
enum flags {
/// Index data required for spelling correction.
FLAG_SPELLING = 128 // Value matches QueryParser flag.
};
/** Set flags.
*
* The new value of flags is: (flags & mask) ^ toggle
*
* To just set the flags, pass the new flags in toggle and the
* default value for mask.
*
* @param toggle Flags to XOR.
* @param mask Flags to AND with first.
*
* @return The old flags setting.
*/
flags set_flags(flags toggle, flags mask = flags(0));
/** Index some text.
*
* @param itor Utf8Iterator pointing to the text to index.
* @param wdf_inc The wdf increment (default 1).
* @param prefix The term prefix to use (default is no prefix).
*/
void index_text(const Xapian::Utf8Iterator & itor,
Xapian::termcount wdf_inc = 1,
const std::string & prefix = std::string());
/** Index some text in a std::string.
*
* @param text The text to index.
* @param wdf_inc The wdf increment (default 1).
* @param prefix The term prefix to use (default is no prefix).
*/
void index_text(const std::string & text,
Xapian::termcount wdf_inc = 1,
const std::string & prefix = std::string()) {
return index_text(Utf8Iterator(text), wdf_inc, prefix);
}
/** Index some text without positional information.
*
* Just like index_text, but no positional information is generated. This
* means that the database will be significantly smaller, but that phrase
* searching and NEAR won't be supported.
*
* @param itor Utf8Iterator pointing to the text to index.
* @param wdf_inc The wdf increment (default 1).
* @param prefix The term prefix to use (default is no prefix).
*/
void index_text_without_positions(const Xapian::Utf8Iterator & itor,
Xapian::termcount wdf_inc = 1,
const std::string & prefix = std::string());
/** Index some text in a std::string without positional information.
*
* Just like index_text, but no positional information is generated. This
* means that the database will be significantly smaller, but that phrase
* searching and NEAR won't be supported.
*
* @param text The text to index.
* @param wdf_inc The wdf increment (default 1).
* @param prefix The term prefix to use (default is no prefix).
*/
void index_text_without_positions(const std::string & text,
Xapian::termcount wdf_inc = 1,
const std::string & prefix = std::string()) {
return index_text_without_positions(Utf8Iterator(text), wdf_inc, prefix);
}
/** Increase the term position used by index_text.
*
* This can be used between indexing text from different fields or other
* places to prevent phrase searches from spanning between them (e.g.
* between the title and body text, or between two chapters in a book).
*
* @param delta Amount to increase the term position by (default: 100).
*/
void increase_termpos(Xapian::termcount delta = 100);
/// Get the current term position.
Xapian::termcount get_termpos() const;
/** Set the current term position.
*
* @param termpos The new term position to set.
*/
void set_termpos(Xapian::termcount termpos);
/// Return a string describing this object.
std::string get_description() const;
};
}
#endif // XAPIAN_INCLUDED_TERMGENERATOR_H
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