Gaudi Framework, version v23r2: /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v23r2/GaudiKernel/GaudiKernel/IEvtSelector.h Source File

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00001 //$Header: /tmp/svngaudi/tmp.jEpFh25751/Gaudi/GaudiKernel/GaudiKernel/IEvtSelector.h,v 1.5 2006/11/30 15:22:07 dquarrie Exp $
00002 #ifndef GAUDIKERNEL_IEVTSELECTOR_H
00003 #define GAUDIKERNEL_IEVTSELECTOR_H 1
00004 
00005 // Include files
00006 #include "GaudiKernel/IInterface.h"
00007 #include "GaudiKernel/IOpaqueAddress.h"
00008 #include "GaudiKernel/StatusCode.h"
00009 #include <string>
00010 
00019 class GAUDI_API IEvtSelector: virtual public IInterface {
00020 public:
00022   DeclareInterfaceID(IEvtSelector,2,0);
00023 
00024   class Context{
00025   public:
00026     virtual ~Context() { }
00027     virtual void* identifier() const=0;
00028   };
00029 
00035   virtual StatusCode createContext(Context*& c) const = 0;
00036 
00044   virtual StatusCode next(Context& c) const  = 0;
00045 
00051   virtual StatusCode next(Context& c,int jump) const  = 0;
00052 
00059   virtual StatusCode previous(Context& c) const = 0;
00060 
00066   virtual StatusCode previous(Context& c,int jump) const = 0;
00067 
00071   virtual StatusCode last(Context& refContext) const = 0;
00072 
00078   virtual StatusCode rewind(Context& c) const = 0;
00079 
00086   virtual StatusCode createAddress(const Context& c,IOpaqueAddress*& iop) const = 0;
00087 
00092   virtual StatusCode releaseContext(Context*&)const=0;
00093 
00100   virtual StatusCode resetCriteria(const std::string& cr,Context& c)const=0;
00101 };
00102 
00103 #endif //GAUDIKERNEL_IEVTSELECTOR_H