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/**
* 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.
*/
#pragma once
#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/bson/mutable/element.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/ops/modifier_interface.h"
namespace mongo {
class LogBuilder;
class ModifierObjectReplace : public ModifierInterface {
MONGO_DISALLOW_COPYING(ModifierObjectReplace);
public:
ModifierObjectReplace();
//
// Modifier interface implementation
//
virtual ~ModifierObjectReplace();
/**
* Returns true and takes the embedded object contained in 'modExpr' to be the object
* we're replacing for. The field name of 'modExpr' is ignored. If 'modExpr' is in an
* unexpected format or if it can't be parsed for some reason, returns an error status
* describing the error.
*/
virtual Status init(const BSONElement& modExpr, const Options& opts,
bool* positional = NULL);
/**
* Registers the that 'root' is in the document that we want to fully replace.
* prepare() returns OK and always fills 'execInfo' with true for
* noOp.
*/
virtual Status prepare(mutablebson::Element root,
StringData matchedField,
ExecInfo* execInfo);
/**
* Replaces the document passed in prepare() for the object passed in init(). Returns
* OK if successful or a status describing the error.
*/
virtual Status apply() const;
/**
* Adds a log entry to logRoot corresponding to full object replacement. Returns OK if
* successful or a status describing the error.
*/
virtual Status log(LogBuilder* logBuilder) const;
private:
// Object to replace with.
BSONObj _val;
// The document whose value needs to be replaced. This state is valid after a prepare()
// was issued and until a log() is issued. The document this mod is being prepared
// against must e live throughout all the calls.
struct PreparedState;
std::unique_ptr<PreparedState> _preparedState;
};
} // namespace mongo
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