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//@file update.h

/**
 *    Copyright (C) 2008 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.
 */

#pragma once

#include "mongo/db/jsobj.h"
#include "mongo/db/curop.h"
#include "mongo/db/ops/update_request.h"
#include "mongo/db/ops/update_result.h"
#include "mongo/db/query_plan_selection_policy.h"

namespace mongo {

    class UpdateDriver;

    UpdateResult update(const UpdateRequest& request, OpDebug* opDebug);

    UpdateResult update(const UpdateRequest& request, OpDebug* opDebug, UpdateDriver* driver);

    /**
     * takes the from document and returns a new document
     * after apply all the operators
     * e.g.
     *   applyUpdateOperators( BSON( "x" << 1 ) , BSON( "$inc" << BSON( "x" << 1 ) ) );
     *   returns: { x : 2 }
     */
    BSONObj applyUpdateOperators( const BSONObj& from, const BSONObj& operators );
}  // namespace mongo