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// expression_text.cpp
/**
* Copyright (C) 2013 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.
*/
#define MONGO_PCH_WHITELISTED
#include "mongo/platform/basic.h"
#include "mongo/pch.h"
#undef MONGO_PCH_WHITELISTED
#include "mongo/db/matcher/expression_text.h"
namespace mongo {
using std::string;
Status TextMatchExpression::init( const string& query, const string& language ) {
_query = query;
_language = language;
return initPath( "_fts" );
}
bool TextMatchExpression::matchesSingleElement( const BSONElement& e ) const {
// See ops/update.cpp.
// This node is removed by the query planner. It's only ever called if we're getting an
// elemMatchKey.
return true;
}
void TextMatchExpression::debugString( StringBuilder& debug, int level ) const {
_debugAddSpace(debug, level);
debug << "TEXT : query=" << _query << ", language=" << _language << ", tag=";
MatchExpression::TagData* td = getTag();
if ( NULL != td ) {
td->debugString( &debug );
}
else {
debug << "NULL";
}
debug << "\n";
}
void TextMatchExpression::toBSON(BSONObjBuilder* out) const {
out->append("$text", BSON("$search" << _query << "$language" << _language));
}
bool TextMatchExpression::equivalent( const MatchExpression* other ) const {
if ( matchType() != other->matchType() ) {
return false;
}
const TextMatchExpression* realOther = static_cast<const TextMatchExpression*>( other );
// TODO This is way too crude. It looks for string equality, but it should be looking for
// common parsed form
if ( realOther->getQuery() != _query ) {
return false;
}
if ( realOther->getLanguage() != _language ) {
return false;
}
return true;
}
LeafMatchExpression* TextMatchExpression::shallowClone() const {
TextMatchExpression* next = new TextMatchExpression();
next->init( _query, _language );
if ( getTag() ) {
next->setTag( getTag()->clone() );
}
return next;
}
}
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