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// fts_query.h
/**
* Copyright (C) 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/db/fts/stemmer.h"
#include "mongo/db/fts/stop_words.h"
#include "mongo/util/stringutils.h"
namespace mongo {
namespace fts {
class FTSQuery {
public:
// Initializes an FTSQuery. Note that the parsing of "language" depends on the text
// index version, since a query which doesn't specify a language and is against a
// version 1 text index with a version 1 default language string needs to be parsed as
// version 1 (see fts_language.cpp for a list of language strings specific to version
// 1).
Status parse(const std::string& query, StringData language, bool caseSensitive,
TextIndexVersion textIndexVersion);
const std::set<std::string>& getPositiveTerms() const { return _positiveTerms; }
const std::set<std::string>& getNegatedTerms() const { return _negatedTerms; }
const std::vector<std::string>& getPositivePhr() const { return _positivePhrases; }
const std::vector<std::string>& getNegatedPhr() const { return _negatedPhrases; }
const std::set<std::string>& getTermsForBounds() const {
return _termsForBounds;
}
const FTSLanguage& getLanguage() const { return *_language; }
bool getCaseSensitive() const { return _caseSensitive; }
std::string toString() const;
std::string debugString() const;
BSONObj toBSON() const;
/**
* Lowercases "str" if _caseSensitive is set, else returns a copy of "str" unchanged.
*/
std::string normalizeString( StringData str ) const;
static const bool caseSensitiveDefault;
private:
void _addTerm( const StopWords& sw,
const Stemmer& stemmer,
const std::string& token,
bool negated );
const FTSLanguage* _language;
bool _caseSensitive;
// Positive terms.
std::set<std::string> _positiveTerms;
// Negated terms.
std::set<std::string> _negatedTerms;
// Positive phrases.
std::vector<std::string> _positivePhrases;
// Negated phrases.
std::vector<std::string> _negatedPhrases;
// Terms for bounds.
std::set<std::string> _termsForBounds;
};
}
}
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