RootEvtSelector.h

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#ifndef ROOTEVTSELECTOR_H
#define ROOTEVTSELECTOR_H 1
 
#include "GaudiKernel/IEvtSelector.h"
#include "GaudiKernel/ISvcLocator.h"
#include "GaudiKernel/Service.h"
 
class IAddressCreator;
class IDataProviderSvc;
class RootInterface;
class RootEventContext;
 
static const InterfaceID IID_IRootEvtSelector("IRootEvtSelector", 1, 0);
 
/** @class RootEvtSelector
* @brief RootEvtSelector performs the function of controlling the 
* ApplicationMgr loop. 
*
* Adapted to RootCnvSvc from GlastSvc/EventSelector. 
* The input property can now be set either to NONE or to ROOT.
* If it is NONE, the loop 
* will run until it hits EvtMax. A new class variable was added :m_evtMax 
* which is a local copy of the AppMgrs property. 
*
* $Header: /bes/bes/BossCvs/Event/RootCnvSvc/RootCnvSvc/RootEvtSelector.h,v 1.11 2008/01/09 00:05:48 codeman Exp $
*/
class RootEvtSelector : virtual public Service, 
                        virtual public IEvtSelector,
                        virtual public IProperty {
public:
  // constructor and destructor 
  RootEvtSelector(  const std::string& name, ISvcLocator* svcloc );
  ~RootEvtSelector();
 
  // IEvtSelector implementation
  virtual StatusCode initialize();
 
  // Implementation of the IEvtSelector interface methods. 
  virtual StatusCode createContext(Context*& it) const; 
  StatusCode next() const;
  virtual StatusCode next(Context& it) const; 
  virtual StatusCode next(Context& it, int jump) const; 
  virtual StatusCode previous(Context& it) const; 
  virtual StatusCode previous(Context& it, int jump) const; 
    
  virtual StatusCode last(Context& it) const; 
  virtual StatusCode rewind(Context& it) const; 
    
  virtual StatusCode createAddress(const Context& it,IOpaqueAddress*& iop) const; 
  virtual StatusCode releaseContext(Context*& it) const; 
  virtual StatusCode resetCriteria(const std::string& criteria, Context& context) const; 
        
  virtual StatusCode setCriteria( const std::string& criteria ); 
     
  // IInterface implementation
  virtual StatusCode queryInterface(const InterfaceID& riid, void** ppvInterface); 
    
  // int IEvtSelector::getrecId();
  int getRecId() const {  return (*m_recId); }
    
private:
  enum CriteriaType { 
    ROOT,   //When the input is a ROOT file
    NONE    //When there is no input
  };
       
  // Used internally to get the MaxEvent from the ApplicationMgr
  StatusCode getMaxEvent();
 
  RootEventContext*    p_beginContext; 
  RootEventContext*    p_endContext; 
 
  std::string           m_criteria;
  StringProperty        m_jobInput;
  CriteriaType          m_criteriaType;
 
  // pointer to RootInterface
  RootInterface*              m_rootInterface;
 
  // pointer to AddressCreator
  IAddressCreator*      m_addrCreator;
 
  // CLID of root basic object
  CLID                  m_rootCLID;
 
  /// max nr of events to be treated
  int                   m_evtMax;
 
  /// counts number of event
  int*                   m_recId;
};
 
#endif  // RootEvtSelector_H