#ifndef INC_MISSINGETCHUNK
#define INC_MISSINGETCHUNK
// //////////////////////////////////////////////////////////////////////////
// File: MissingETChunk.hpp                                                //
//                                                                         //
// Purpose:   Chunk containing MissingET objects                           //  
//                                                                         // 
// Created:   26-JUN-1998 John Womersley                                   //
// History:                                                                // 
//            01-NOV-2001 Serban Protopopescu/Joe Steele: Added method so  //
//               MissingET won't break thumbnail code.                     //
// //////////////////////////////////////////////////////////////////////////

// Dependencies (#includes)

#include "edm/AbsChunk.hpp"
#include "identifiers/EnvID.hpp"
#include "identifiers/RCPID.hpp"
#include "missingET/MissingET.hpp"
#include <vector>

#ifndef __CINT__
#include "missingET/MissingETChunk_ref.hpp"
#include "missingET/MissingET_ref.hpp"
#include "identifiers/EnvID_ref.hpp"
#include "identifiers/RCPID_ref.hpp"
#endif

class MissingETChunk : public edm::AbsChunk {

  CHUNK_SETUP(MissingETChunk);
  
public:
    
  // Constructors

  MissingETChunk();  // Default 

  // full reconstructor. Chunk made with existing missing ET object
  MissingETChunk(const edm::RCPID& rcpID, 
	         const edm::EnvID& envID,
	         const std::list<edm::ChunkID> & parentIDs,
	         const MissingET &met);

  // needed for ThumbNail
  MissingETChunk(const std::list<edm::RCPID>& rcpIDs, 
	         const std::list<edm::ChunkID> & parentIDs);

  // Following functions overloaded from parent class AbsChunk

  // Return IDs for this chunk
  std::list<edm::ChunkID> parents() const;
  std::list<edm::RCPID>   rcps() const;
  std::list<edm::EnvID>   environment() const;

  // accessors
  MissingET* getMissingET() const;
  const std::vector<MissingET>* getParticles() const;  // needed for ThumbNail
  MissingET* create_and_add(){ _met=MissingET(); return &_met;} // needed for ThumbNail
  // Print chunk to stream
  void printChunk(std::ostream& out) const;

  // Destructor
  ~MissingETChunk();

private:

  // These data are fixed for each instance of CalCClusterChunk
  edm::RCPID    _rcpID;
  edm::RCPID    _rcpIDtmb;
  edm::EnvID    _envID;

  // Vary event by event
  std::list<edm::ChunkID>  _parentIDs;

  int _version;
  mutable MissingET _met; 

#ifndef __CINT__
  mutable std::vector<MissingET> _vmet; //! needed for ThumbNail
#endif 

};

#endif // INC_MISSINGETCHUNK