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;

  typedef boost::shared_ptr<MessageCollectionHelper> Ptr;
};

template<class M>
  class MessageCollection
  {
  public:
    MessageCollection(MessageCollectionHelper::Ptr collection);

    MessageCollection(const MessageCollection& rhs);

    ~MessageCollection();

    MessageCollection& operator=(const MessageCollection& other);

    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_;
  };

} // namespace

#include "impl/message_collection_impl.hpp"

#endif // include guard