IEvtSelector.h

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//$Header: /tmp/svngaudi/tmp.jEpFh25751/Gaudi/GaudiKernel/GaudiKernel/IEvtSelector.h,v 1.5 2006/11/30 15:22:07 dquarrie Exp $
#ifndef GAUDIKERNEL_IEVTSELECTOR_H
#define GAUDIKERNEL_IEVTSELECTOR_H 1

// Include files
#include "GaudiKernel/IInterface.h"
#include "GaudiKernel/IOpaqueAddress.h"
#include "GaudiKernel/StatusCode.h"
#include <string>

class GAUDI_API IEvtSelector: virtual public IInterface {
public:
  DeclareInterfaceID(IEvtSelector,2,0);

  class Context{
  public:
    virtual ~Context() { }
    virtual void* identifier() const=0;
  };

  virtual StatusCode createContext(Context*& c) const = 0;

  virtual StatusCode next(Context& c) const  = 0;

  virtual StatusCode next(Context& c,int jump) const  = 0;

  virtual StatusCode previous(Context& c) const = 0;

  virtual StatusCode previous(Context& c,int jump) const = 0;

  virtual StatusCode last(Context& refContext) const = 0;

  virtual StatusCode rewind(Context& c) const = 0;

  virtual StatusCode createAddress(const Context& c,IOpaqueAddress*& iop) const = 0;

  virtual StatusCode releaseContext(Context*&)const=0;

  virtual StatusCode resetCriteria(const std::string& cr,Context& c)const=0;
};

#endif //GAUDIKERNEL_IEVTSELECTOR_H