text: /*    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 <vector>
  
  #include "mongo/base/disallow_copying.h"
  
  namespace mongo {
  
      /**
       * An std::vector 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 OwnedPointerVector<T> wraps an std::vector<T*>.
       */
      template<class T>
      class OwnedPointerVector {
          MONGO_DISALLOW_COPYING(OwnedPointerVector);
  
      public:
          OwnedPointerVector();
          ~OwnedPointerVector();
  
          typedef typename std::vector<T*>::const_iterator const_iterator;
          typedef typename std::vector<T*>::const_reverse_iterator const_reverse_iterator;
  
          /** Access the vector. */
          const std::vector<T*>& vector() const { return _vector; }
          std::vector<T*>& mutableVector() { return _vector; }
  
          std::size_t size() const { return _vector.size(); }
          bool empty() const { return _vector.empty(); }
  
          const_iterator begin() const { return _vector.begin(); }
          const_reverse_iterator rbegin() const { return _vector.rbegin(); }
          const_iterator end() const { return _vector.end(); }
          const_reverse_iterator rend() const { return _vector.rend(); }
  
          void clear();
  
      private:
          std::vector<T*> _vector;
      };
  
      template<class T>
      OwnedPointerVector<T>::OwnedPointerVector() {
      }
  
      template<class T>
      OwnedPointerVector<T>::~OwnedPointerVector() {
          clear();
      }
  
      template<class T>
      void OwnedPointerVector<T>::clear() {
          for( typename std::vector<T*>::iterator i = _vector.begin(); i != _vector.end(); ++i ) {
              delete *i;
          }
          _vector.clear();
      }
  
  } // namespace mongo
  