src/mongo/db/fts/stop_words.cpp


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

// stop_words.cpp

/**
*    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.
*/

#include <set>
#include <string>

#include "mongo/db/fts/stop_words.h"

#include "mongo/base/init.h"
#include "mongo/util/string_map.h"

namespace mongo {

    namespace fts {

        void loadStopWordMap( StringMap< std::set< std::string > >* m );

        namespace {
            StringMap< std::shared_ptr<StopWords> > StopWordsMap;
            StopWords empty;
        }


        StopWords::StopWords(){
        }

        StopWords::StopWords( const std::set<std::string>& words ) {
            for ( std::set<std::string>::const_iterator i = words.begin(); i != words.end(); ++i )
                _words.insert( *i );
        }

        const StopWords* StopWords::getStopWords( const FTSLanguage* language ) {
            auto i = StopWordsMap.find( language->str() );
            if ( i == StopWordsMap.end() )
                return &empty;
            return i->second.get();
        }


        MONGO_INITIALIZER(StopWords)(InitializerContext* context) {
            StringMap< std::set< std::string > > raw;
            loadStopWordMap( &raw );
            for ( StringMap< std::set< std::string > >::const_iterator i = raw.begin();
                  i != raw.end();
                  ++i ) {
                StopWordsMap[i->first].reset(new StopWords( i->second ));
            }
            return Status::OK();
        }

    }

}