.. _program_listing_file__tmp_ws_src_warehouse_ros_mongo_include_warehouse_ros_mongo_message_collection.h:

Program Listing for File message_collection.h
=============================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_warehouse_ros_mongo_include_warehouse_ros_mongo_message_collection.h>` (``/tmp/ws/src/warehouse_ros_mongo/include/warehouse_ros_mongo/message_collection.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2008 Willow Garage, Inc.
   //
   // Redistribution and use in source and binary forms, with or without
   // modification, are permitted provided that the following conditions are met:
   //
   //    * Redistributions of source code must retain the above copyright
   //      notice, this list of conditions and the following disclaimer.
   //
   //    * Redistributions in binary form must reproduce the above copyright
   //      notice, this list of conditions and the following disclaimer in the
   //      documentation and/or other materials provided with the distribution.
   //
   //    * Neither the name of the Willow Garage, Inc. nor the names of its
   //      contributors may be used to endorse or promote products derived from
   //      this software without specific prior written permission.
   //
   // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   // POSSIBILITY OF SUCH DAMAGE.
   
   #ifndef WAREHOUSE_ROS_MONGO_MESSAGE_COLLECTION_H
   #define WAREHOUSE_ROS_MONGO_MESSAGE_COLLECTION_H
   
   #include <warehouse_ros/message_collection.h>
   #include <warehouse_ros_mongo/query_results.h>
   
   namespace warehouse_ros_mongo
   {
   using warehouse_ros::MessageCollectionHelper;
   using warehouse_ros::Metadata;
   using warehouse_ros::Query;
   using warehouse_ros::ResultIteratorHelper;
   
   class MongoMessageCollection : public warehouse_ros::MessageCollectionHelper
   {
   public:
     MongoMessageCollection(const std::shared_ptr<mongo::DBClientConnection>& conn, const std::string& db_name,
                            const std::string& collection_name);
   
     bool initialize(const std::string& datatype, const std::string& md5);
   
     void ensureIndex(const std::string& field);
   
     void insert(char* msg, size_t msg_size, Metadata::ConstPtr metadata);
   
     ResultIteratorHelper::Ptr query(Query::ConstPtr query, const std::string& sort_by, bool ascending) const;
   
     unsigned removeMessages(Query::ConstPtr query);
   
     void modifyMetadata(Query::ConstPtr q, Metadata::ConstPtr m);
   
     unsigned count();
   
     std::string collectionName() const;
   
     Query::Ptr createQuery() const
     {
       return Query::Ptr(new MongoQuery());
     }
   
     Metadata::Ptr createMetadata() const
     {
       return Metadata::Ptr(new MongoMetadata());
     }
   
   private:
     void listMetadata(mongo::Query& mquery, std::vector<mongo::BSONObj>& metas);
   
     inline MongoMetadata& downcastMetadata(Metadata::ConstPtr metadata) const
     {
       return *(const_cast<MongoMetadata*>(static_cast<const MongoMetadata*>(metadata.get())));
     }
   
     inline MongoQuery& downcastQuery(Query::ConstPtr query) const
     {
       return *(const_cast<MongoQuery*>(static_cast<const MongoQuery*>(query.get())));
     }
   
     std::shared_ptr<mongo::DBClientConnection> conn_;
     std::shared_ptr<mongo::GridFS> gfs_;
     const std::string ns_;
     const std::string db_;
     const std::string coll_;
   };
   
   }  // namespace warehouse_ros_mongo
   
   #endif  // include guard