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/**
* Copyright (C) 2018-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 <map>
#include "mongo/base/disallow_copying.h"
namespace mongo {
/**
* An std::map wrapper that deletes pointers within a vector on destruction. The objects
* referenced by the vector's pointers are 'owned' by an object of this class.
* NOTE that an OwnedPointerMap<K,T,Compare> wraps an std::map<K,T*,Compare>.
*/
template <class K, class T, class Compare = std::less<K>>
class OwnedPointerMap {
MONGO_DISALLOW_COPYING(OwnedPointerMap);
public:
typedef typename std::map<K, T*, Compare> MapType;
OwnedPointerMap();
~OwnedPointerMap();
/** Access the map. */
const MapType& map() const {
return _map;
}
MapType& mutableMap() {
return _map;
}
void clear();
private:
MapType _map;
};
template <class K, class T, class Compare>
OwnedPointerMap<K, T, Compare>::OwnedPointerMap() {}
template <class K, class T, class Compare>
OwnedPointerMap<K, T, Compare>::~OwnedPointerMap() {
clear();
}
template <class K, class T, class Compare>
void OwnedPointerMap<K, T, Compare>::clear() {
for (typename MapType::iterator i = _map.begin(); i != _map.end(); ++i) {
delete i->second;
}
_map.clear();
}
} // namespace mongo
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