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query_results.h
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query_results.h
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// 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.
/**
* \file
*
* Implementation of warehouse_ros::ResultIteratorHelper for mongo queries
*
* \author Bhaskara Marthi
*/
#ifndef WAREHOUSE_ROS_MONGO_QUERY_RESULTS_H
#define WAREHOUSE_ROS_MONGO_QUERY_RESULTS_H
#include <warehouse_ros_mongo/metadata.h>
#include <mongo/client/dbclientcursor.h>
#include <warehouse_ros/query_results.h>
#include <boost/optional.hpp>
#include <memory>
namespace warehouse_ros_mongo
{
typedef std::unique_ptr<mongo::DBClientCursor> CursorPtr;
class MongoResultIterator : public warehouse_ros::ResultIteratorHelper
{
public:
MongoResultIterator(const std::shared_ptr<mongo::DBClientConnection>& conn, std::shared_ptr<mongo::GridFS> gfs,
const std::string& ns, const mongo::Query& query);
bool next();
bool hasData() const;
warehouse_ros::Metadata::ConstPtr metadata() const;
std::string message() const;
mongo::BSONObj metadataRaw() const;
private:
CursorPtr cursor_;
boost::optional<mongo::BSONObj> next_;
std::shared_ptr<mongo::GridFS> gfs_;
};
} // namespace warehouse_ros_mongo
#endif // include guard