lmsg/Message.hh

#ifndef LMSG_MESSAGE_HH
#define LMSG_MESSAGE_HH

#include "lmsg/MsgHeader.hh"
#include <stdexcept>

namespace lmsg {

  class TransInput;
  class TransOutput;

  class Message {
  public:
    Message(void) {}

    virtual ~Message(void) {}

    virtual size_type size(void) const = 0;

    virtual void getData(TransOutput& out) const = 0;

    virtual MsgHeader::MsgType getType(void) const = 0;

    virtual void setData(TransInput& in) throw(std::runtime_error) = 0;

  };   // class lmsg::Message


  template<unsigned int MsgID>
  class HdrOnlyMsg : public Message {
  public:

    HdrOnlyMsg(void) {}

    ~HdrOnlyMsg(void) {}

    size_type size(void) const {return 0;}

    void getData(TransOutput& out) const {}

    MsgHeader::MsgType getType(void) const {return MsgID;}

    void setData(TransInput& in) throw(std::runtime_error) {}
  private:
  };

}      // namespace lmsg

#endif //  def(LMSG_MESSAGE_HH)

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