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// expression_parser_tree.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/>.
*/
#include "mongo/db/matcher/expression_parser.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/bsonobjiterator.h"
#include "mongo/bson/bson-inl.h"
#include "mongo/db/matcher/expression_array.h"
#include "mongo/db/matcher/expression_leaf.h"
#include "mongo/db/matcher/expression_tree.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
Status MatchExpressionParser::_parseTreeList( const BSONObj& arr, ListOfMatchExpression* out ) {
BSONObjIterator i( arr );
while ( i.more() ) {
BSONElement e = i.next();
if ( e.type() != Object )
return Status( ErrorCodes::BadValue,
"$or/$and/$nor entries need to be full objects" );
StatusWithMatchExpression sub = parse( e.Obj() );
if ( !sub.isOK() )
return sub.getStatus();
out->add( sub.getValue() );
}
return Status::OK();
}
StatusWithMatchExpression MatchExpressionParser::_parseNot( const char* name,
const BSONElement& e ) {
if ( e.type() == RegEx ) {
StatusWithMatchExpression s = _parseRegexElement( name, e );
if ( !s.isOK() )
return s;
std::auto_ptr<NotMatchExpression> n( new NotMatchExpression() );
Status s2 = n->init( s.getValue() );
if ( !s2.isOK() )
return StatusWithMatchExpression( s2 );
return StatusWithMatchExpression( n.release() );
}
if ( e.type() != Object )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$not needs a regex or a document" );
std::auto_ptr<AndMatchExpression> theAnd( new AndMatchExpression() );
Status s = _parseSub( name, e.Obj(), theAnd.get() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
std::auto_ptr<NotMatchExpression> theNot( new NotMatchExpression() );
s = theNot->init( theAnd.release() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( theNot.release() );
}
}
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