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// expression_parser_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.
*/
#include "mongo/base/init.h"
#include "mongo/db/fts/fts_language.h"
#include "mongo/db/fts/fts_spec.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/matcher/expression_parser.h"
#include "mongo/db/matcher/expression_text.h"
namespace mongo {
using std::auto_ptr;
using std::string;
StatusWithMatchExpression expressionParserTextCallbackReal( const BSONObj& queryObj ) {
// Validate queryObj, but defer construction of FTSQuery (which requires access to the
// target namespace) until stage building time.
int expectedFieldCount = 1;
if ( mongo::String != queryObj["$search"].type() ) {
return StatusWithMatchExpression( ErrorCodes::TypeMismatch,
"$search requires a string value" );
}
string language = "";
BSONElement languageElt = queryObj["$language"];
if ( !languageElt.eoo() ) {
expectedFieldCount++;
if ( mongo::String != languageElt.type() ) {
return StatusWithMatchExpression( ErrorCodes::TypeMismatch,
"$language requires a string value" );
}
language = languageElt.String();
Status status =
fts::FTSLanguage::make( language, fts::TEXT_INDEX_VERSION_2 ).getStatus();
if ( !status.isOK() ) {
return StatusWithMatchExpression( ErrorCodes::BadValue,
"$language specifies unsupported language" );
}
}
string query = queryObj["$search"].String();
BSONElement caseSensitiveElt = queryObj["$caseSensitive"];
bool caseSensitive = fts::FTSQuery::caseSensitiveDefault;
if ( !caseSensitiveElt.eoo() ) {
expectedFieldCount++;
if ( mongo::Bool != caseSensitiveElt.type() ) {
return StatusWithMatchExpression( ErrorCodes::TypeMismatch,
"$caseSensitive requires a boolean value" );
}
caseSensitive = caseSensitiveElt.trueValue();
}
if ( queryObj.nFields() != expectedFieldCount ) {
return StatusWithMatchExpression( ErrorCodes::BadValue, "extra fields in $text" );
}
auto_ptr<TextMatchExpression> e( new TextMatchExpression() );
Status s = e->init( query, language, caseSensitive );
if ( !s.isOK() ) {
return StatusWithMatchExpression( s );
}
return StatusWithMatchExpression( e.release() );
}
MONGO_INITIALIZER( MatchExpressionParserText )( ::mongo::InitializerContext* context ) {
expressionParserTextCallback = expressionParserTextCallbackReal;
return Status::OK();
}
}
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