.. _program_listing_file__tmp_ws_src_warehouse_ros_sqlite_include_warehouse_ros_sqlite_message_collection_helper.hpp:

Program Listing for File message_collection_helper.hpp
======================================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_warehouse_ros_sqlite_include_warehouse_ros_sqlite_message_collection_helper.hpp>` (``/tmp/ws/src/warehouse_ros_sqlite/include/warehouse_ros_sqlite/message_collection_helper.hpp``)

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.. code-block:: cpp

   // Copyright 2020 Bjarne von Horn
   //
   // 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 copyright holder 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.
   
   // SPDX-License-Identifier: BSD-3-Clause
   
   #ifndef WAREHOUSE_ROS_SQLITE__MESSAGE_COLLECTION_HELPER_HPP_
   #define WAREHOUSE_ROS_SQLITE__MESSAGE_COLLECTION_HELPER_HPP_
   
   #include <warehouse_ros/message_collection.h>
   #include <warehouse_ros_sqlite/utils.hpp>
   #include <warehouse_ros_sqlite/warehouse_ros_sqlite_export.hpp>
   
   #include <string>
   #include <utility>
   
   namespace warehouse_ros_sqlite
   {
   class WAREHOUSE_ROS_SQLITE_EXPORT MessageCollectionHelper : public warehouse_ros::
     MessageCollectionHelper
   {
     sqlite3_ptr db_;
     std::string collection_name_;
     std::string db_name_;
     std::string mangled_tablename_;
     schema::escaped_tablename escaped_mangled_name_;
   
   public:
     MessageCollectionHelper() = default;
     MessageCollectionHelper(sqlite3_ptr db, const std::string & db_name, const std::string & name)
     : db_(std::move(db)),
       collection_name_(name),
       db_name_(db_name),
       mangled_tablename_(schema::mangle_database_and_collection_name(db_name, name)),
       escaped_mangled_name_(schema::escape_and_mangle_database_and_collection_name(db_name, name))
     {
     }
     bool initialize(const std::string & datatype, const std::string & md5) override;
     void insert(char * msg, size_t msg_size, warehouse_ros::Metadata::ConstPtr metadata) override;
     warehouse_ros::ResultIteratorHelper::Ptr query(
       warehouse_ros::Query::ConstPtr query, const std::string & sort_by = "",
       bool ascending = true) const override;
     unsigned removeMessages(warehouse_ros::Query::ConstPtr query) override;
     void modifyMetadata(
       warehouse_ros::Query::ConstPtr q,
       warehouse_ros::Metadata::ConstPtr m) override;
     unsigned count() override;
     warehouse_ros::Query::Ptr createQuery() const override;
     warehouse_ros::Metadata::Ptr createMetadata() const override;
     std::string collectionName() const override
     {
       return collection_name_;
     }
   
   private:
     enum class Md5CompareResult
     {
       EMPTY,
       MATCH,
       MISMATCH
     };
     Md5CompareResult findAndMatchMd5Sum(const std::array<unsigned char, 16> & md5_bytes);
   };
   
   }  // namespace warehouse_ros_sqlite
   
   #endif  // WAREHOUSE_ROS_SQLITE__MESSAGE_COLLECTION_HELPER_HPP_