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// fts_language.cpp
/**
* Copyright (C) 2013 MongoDB 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 "mongo/db/fts/fts_language.h"
#include <string>
#include "mongo/base/init.h"
#include "mongo/db/fts/fts_basic_tokenizer.h"
#include "mongo/stdx/memory.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/string_map.h"
#include "mongo/util/stringutils.h"
namespace mongo {
namespace fts {
namespace {
/**
* Case-insensitive StringData comparator.
*/
struct LanguageStringCompare {
/** Returns true if lhs < rhs. */
bool operator()(std::string lhs, std::string rhs) const {
size_t minSize = std::min(lhs.size(), rhs.size());
for (size_t x = 0; x < minSize; x++) {
char a = tolower(lhs[x]);
char b = tolower(rhs[x]);
if (a < b) {
return true;
}
if (a > b) {
return false;
}
}
return lhs.size() < rhs.size();
}
};
// Lookup table from user language string (case-insensitive) to FTSLanguage. Populated
// by initializers in group FTSAllLanguagesRegistered and initializer
// FTSRegisterLanguageAliases. For use with TEXT_INDEX_VERSION_2 text indexes only.
typedef std::map<std::string, const FTSLanguage*, LanguageStringCompare> LanguageMapV2;
LanguageMapV2 languageMapV2;
// Like languageMapV2, but for use with TEXT_INDEX_VERSION_1 text indexes.
// Case-sensitive by lookup key.
typedef std::map<StringData, const FTSLanguage*> LanguageMapV1;
LanguageMapV1 languageMapV1;
}
std::unique_ptr<FTSTokenizer> BasicFTSLanguage::createTokenizer() const {
return stdx::make_unique<BasicFTSTokenizer>(this);
}
MONGO_INITIALIZER_GROUP(FTSAllLanguagesRegistered, MONGO_NO_PREREQUISITES, MONGO_NO_DEPENDENTS);
//
// Register supported languages' canonical names for TEXT_INDEX_VERSION_2.
//
MONGO_FTS_LANGUAGE_DECLARE(languageNoneV2, "none", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageDanishV2, "danish", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageDutchV2, "dutch", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageEnglishV2, "english", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageFinnishV2, "finnish", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageFrenchV2, "french", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageGermanV2, "german", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageHungarianV2, "hungarian", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageItalianV2, "italian", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageNorwegianV2, "norwegian", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languagePortugueseV2, "portuguese", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageRomanianV2, "romanian", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageRussianV2, "russian", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageSpanishV2, "spanish", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageSwedishV2, "swedish", TEXT_INDEX_VERSION_2);
MONGO_FTS_LANGUAGE_DECLARE(languageTurkishV2, "turkish", TEXT_INDEX_VERSION_2);
//
// Register all Snowball language modules for TEXT_INDEX_VERSION_1. Note that only the full
// names are recognized by the StopWords class (as such, the language string "dan" in
// TEXT_INDEX_VERSION_1 will generate the Danish stemmer and the empty stopword list).
//
MONGO_FTS_LANGUAGE_DECLARE(languageNoneV1, "none", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDaV1, "da", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDanV1, "dan", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDanishV1, "danish", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDeV1, "de", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDeuV1, "deu", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDutV1, "dut", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageDutchV1, "dutch", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageEnV1, "en", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageEngV1, "eng", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageEnglishV1, "english", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageEsV1, "es", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageEslV1, "esl", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFiV1, "fi", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFinV1, "fin", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFinnishV1, "finnish", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFrV1, "fr", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFraV1, "fra", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFreV1, "fre", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageFrenchV1, "french", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageGerV1, "ger", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageGermanV1, "german", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageHuV1, "hu", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageHunV1, "hun", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageHungarianV1, "hungarian", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageItV1, "it", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageItaV1, "ita", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageItalianV1, "italian", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageNlV1, "nl", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageNldV1, "nld", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageNoV1, "no", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageNorV1, "nor", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageNorwegianV1, "norwegian", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languagePorV1, "por", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languagePorterV1, "porter", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languagePortugueseV1, "portuguese", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languagePtV1, "pt", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRoV1, "ro", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRomanianV1, "romanian", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRonV1, "ron", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRuV1, "ru", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRumV1, "rum", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRusV1, "rus", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageRussianV1, "russian", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageSpaV1, "spa", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageSpanishV1, "spanish", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageSvV1, "sv", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageSweV1, "swe", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageSwedishV1, "swedish", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageTrV1, "tr", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageTurV1, "tur", TEXT_INDEX_VERSION_1);
MONGO_FTS_LANGUAGE_DECLARE(languageTurkishV1, "turkish", TEXT_INDEX_VERSION_1);
MONGO_INITIALIZER_WITH_PREREQUISITES(FTSRegisterLanguageAliases, ("FTSAllLanguagesRegistered"))
(InitializerContext* context) {
// Register language aliases for TEXT_INDEX_VERSION_2.
FTSLanguage::registerLanguageAlias(&languageDanishV2, "da", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageDutchV2, "nl", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageEnglishV2, "en", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageFinnishV2, "fi", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageFrenchV2, "fr", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageGermanV2, "de", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageHungarianV2, "hu", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageItalianV2, "it", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageNorwegianV2, "nb", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languagePortugueseV2, "pt", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageRomanianV2, "ro", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageRussianV2, "ru", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageSpanishV2, "es", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageSwedishV2, "sv", TEXT_INDEX_VERSION_2);
FTSLanguage::registerLanguageAlias(&languageTurkishV2, "tr", TEXT_INDEX_VERSION_2);
return Status::OK();
}
// static
void FTSLanguage::registerLanguage(StringData languageName,
TextIndexVersion textIndexVersion,
FTSLanguage* language) {
verify(!languageName.empty());
language->_canonicalName = languageName.toString();
switch (textIndexVersion) {
case TEXT_INDEX_VERSION_2:
languageMapV2[languageName.toString()] = language;
return;
case TEXT_INDEX_VERSION_1:
verify(languageMapV1.find(languageName) == languageMapV1.end());
languageMapV1[languageName] = language;
return;
}
verify(false);
}
// static
void FTSLanguage::registerLanguageAlias(const FTSLanguage* language,
StringData alias,
TextIndexVersion textIndexVersion) {
switch (textIndexVersion) {
case TEXT_INDEX_VERSION_2:
languageMapV2[alias.toString()] = language;
return;
case TEXT_INDEX_VERSION_1:
verify(languageMapV1.find(alias) == languageMapV1.end());
languageMapV1[alias] = language;
return;
}
verify(false);
}
FTSLanguage::FTSLanguage() : _canonicalName() {}
const std::string& FTSLanguage::str() const {
verify(!_canonicalName.empty());
return _canonicalName;
}
// static
StatusWithFTSLanguage FTSLanguage::make(StringData langName, TextIndexVersion textIndexVersion) {
switch (textIndexVersion) {
case TEXT_INDEX_VERSION_2: {
LanguageMapV2::const_iterator it = languageMapV2.find(langName.toString());
if (it == languageMapV2.end()) {
// TEXT_INDEX_VERSION_2 rejects unrecognized language strings.
Status status = Status(ErrorCodes::BadValue,
mongoutils::str::stream() << "unsupported language: \""
<< langName << "\"");
return StatusWithFTSLanguage(status);
}
return StatusWithFTSLanguage(it->second);
}
case TEXT_INDEX_VERSION_1: {
LanguageMapV1::const_iterator it = languageMapV1.find(langName);
if (it == languageMapV1.end()) {
// TEXT_INDEX_VERSION_1 treats unrecognized language strings as "none".
return StatusWithFTSLanguage(&languageNoneV1);
}
return StatusWithFTSLanguage(it->second);
}
}
verify(false);
return StatusWithFTSLanguage(Status::OK());
}
}
}
|
