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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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 <iostream>
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/builder.h"
#include "mongo/util/str.h"
namespace mongo {
namespace repl {
/**
* This class contains an integer used as a member's _id and _memberid.
**/
class MemberId {
public:
MemberId() : _id(kUninitializedMemberId) {}
explicit MemberId(int id) {
if (id < 0) {
uasserted(ErrorCodes::BadValue,
str::stream()
<< "_id field value of " << id << " can't be a negative number");
}
_id = id;
}
static MemberId parseFromBSON(const BSONElement& element) {
if (!element.isNumber()) {
uasserted(ErrorCodes::TypeMismatch,
str::stream()
<< "Element for MemberId was not a number: " << element.toString());
}
return MemberId(element.numberInt());
}
void serializeToBSON(StringData fieldName, BSONObjBuilder* builder) const {
builder->appendNumber(fieldName, _id);
}
int getData() const {
invariant(*this);
return _id;
}
explicit operator bool() const {
return _id != kUninitializedMemberId;
}
std::string toString() const {
return str::stream() << "MemberId(" << (*this ? std::to_string(_id) : "") << ")";
}
friend bool operator==(MemberId lhs, MemberId rhs) {
return lhs._id == rhs._id;
}
friend bool operator!=(MemberId lhs, MemberId rhs) {
return lhs._id != rhs._id;
}
friend bool operator<(MemberId lhs, MemberId rhs) {
return lhs._id < rhs._id;
}
friend bool operator<=(MemberId lhs, MemberId rhs) {
return lhs._id <= rhs._id;
}
friend bool operator>(MemberId lhs, MemberId rhs) {
return lhs._id > rhs._id;
}
friend bool operator>=(MemberId lhs, MemberId rhs) {
return lhs._id >= rhs._id;
}
friend StringBuilder& operator<<(StringBuilder& stream, const MemberId& id) {
return stream << id.toString();
}
friend std::ostream& operator<<(std::ostream& stream, const MemberId& id) {
return stream << id.toString();
}
private:
// The default value for an unset memberId.
static const int kUninitializedMemberId = -1;
int _id;
};
} // namespace repl
} // namespace mongo
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