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/* Copyright 2012 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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> wraps an std::map<K,T*>.
*/
template<class K, class T>
class OwnedPointerMap {
MONGO_DISALLOW_COPYING(OwnedPointerMap);
public:
OwnedPointerMap();
~OwnedPointerMap();
/** Access the map. */
const std::map<K, T*>& map() { return _map; }
std::map<K, T*>& mutableMap() { return _map; }
void clear();
private:
std::map<K, T*> _map;
};
template<class K, class T>
OwnedPointerMap<K, T>::OwnedPointerMap() {
}
template<class K, class T>
OwnedPointerMap<K, T>::~OwnedPointerMap() {
clear();
}
template<class K, class T>
void OwnedPointerMap<K, T>::clear() {
for( typename std::map<K, T*>::iterator i = _map.begin(); i != _map.end(); ++i ) {
delete i->second;
}
_map.clear();
}
} // namespace mongo
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