message_collection.h

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/*
 * Copyright (c) 2008, Willow Garage, Inc.
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#ifndef WAREHOUSE_ROS_MESSAGE_COLLECTION_H
#define WAREHOUSE_ROS_MESSAGE_COLLECTION_H
 
#include <warehouse_ros/query_results.h>
 
namespace warehouse_ros
{
class MessageCollectionHelper
{
public:
  virtual bool initialize(const std::string& datatype, const std::string& md5) = 0;
  virtual void insert(char* msg, size_t msg_size, Metadata::ConstPtr metadata) = 0;
  virtual ResultIteratorHelper::Ptr query(Query::ConstPtr query, const std::string& sort_by = "",
                                          bool ascending = true) const = 0;
  virtual unsigned removeMessages(Query::ConstPtr query) = 0;
  virtual void modifyMetadata(Query::ConstPtr q, Metadata::ConstPtr m) = 0;
  virtual unsigned count() = 0;
  virtual Query::Ptr createQuery() const = 0;
  virtual Metadata::Ptr createMetadata() const = 0;
  virtual std::string collectionName() const = 0;
  virtual ~MessageCollectionHelper() = default;
 
  typedef boost::shared_ptr<MessageCollectionHelper> Ptr;
};
 
template <class M>
class MessageCollection
{
public:
  MessageCollection(MessageCollectionHelper::Ptr collection);
 
  MessageCollection() = default;
 
  void insert(const M& msg, Metadata::Ptr metadata);
 
  typename QueryResults<M>::range_t query(Query::ConstPtr query, bool metadata_only = false,
                                          const std::string& sort_by = "", bool ascending = true) const;
 
  std::vector<typename MessageWithMetadata<M>::ConstPtr> queryList(Query::ConstPtr query, bool metadata_only = false,
                                                                   const std::string& sort_by = "",
                                                                   bool ascending = true) const;
 
  typename MessageWithMetadata<M>::ConstPtr findOne(Query::ConstPtr query, bool metadata_only = false) const;
 
  unsigned removeMessages(Query::ConstPtr query);
 
  void modifyMetadata(Query::ConstPtr q, Metadata::ConstPtr m);
 
  unsigned count();
 
  bool md5SumMatches() const;
 
  Query::Ptr createQuery() const;
 
  Metadata::Ptr createMetadata() const;
 
  typedef boost::shared_ptr<MessageCollection<M> > Ptr;
  typedef M message_type;
 
private:
  MessageCollectionHelper::Ptr collection_;
  bool md5sum_matches_ = false;
};
 
}  // namespace warehouse_ros
 
#include "impl/message_collection_impl.hpp"
 
#endif  // include guard