EventIterator.h

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//      ============================================================
//
//      EventIterator.h
//      ------------------------------------------------------------
//
//      Package   : EventSelector
//
//      Author    : Markus Frank
//
//      ===========================================================
#ifndef GAUDISVC_EVENTSELECTOR_EVENTITERATOR_H
#define GAUDISVC_EVENTSELECTOR_EVENTITERATOR_H 1

// Include files
#include "GaudiKernel/IEvtSelector.h"
#include "GaudiKernel/IDataStreamTool.h"

class EvtSelectorContext  : public IEvtSelector::Context {
  // Friend declaration
  friend class EventSelector;
  friend class EventCollectionSelector;
private:
  EvtSelectorContext ( const EvtSelectorContext& copy)
  : IEvtSelector::Context(copy),
    m_count(copy.m_count),
    m_strCount(copy.m_strCount),
    m_pSelector(copy.m_pSelector), 
    m_context(copy.m_context),
    m_pAddress(copy.m_pAddress)
  {
  }
protected:
  IDataStreamTool::size_type m_streamID;
  long                       m_count;
  long                       m_strCount;
  const IEvtSelector*     m_pSelector;
  IEvtSelector::Context*  m_context;
  IOpaqueAddress*         m_pAddress;
  void set(const IEvtSelector* sel, IDataStreamTool::size_type id, IEvtSelector::Context* it, IOpaqueAddress* pA)    {
    m_pSelector = sel;
    m_context   = it;
    m_streamID  = id;
    m_pAddress  = pA;
    m_strCount  = -1;
  }
  void set(IEvtSelector::Context* it, IOpaqueAddress* pA)    {
    m_context = it;
    m_pAddress = pA;
  }
  void set(IOpaqueAddress* pA)    {
    m_pAddress = pA;
  }
  IEvtSelector::Context* context()  const  {
    return m_context;
  }
  IDataStreamTool::size_type increaseCounters(bool reset=false)   {
    m_count++;
    m_strCount = (reset) ? 0 : m_strCount+1;
    return m_count;
  }
  IDataStreamTool::size_type decreaseCounters(bool reset=false)   {
    m_count++;
    m_strCount = (reset) ? 0 : m_strCount-1;
    return m_count;
  }
public:
  EvtSelectorContext( const IEvtSelector* selector )
  : m_streamID(-1),
    m_count(-1),
    m_strCount(-1),
    m_pSelector(selector),
    m_context(0),
    m_pAddress(0)
  {
  }
  virtual ~EvtSelectorContext() { 
  }
  virtual EvtSelectorContext& operator=(const EvtSelectorContext& copy)   {
    m_streamID  = copy.m_streamID;
    m_count     = copy.m_count;
    m_strCount  = copy.m_strCount;
    m_pSelector = copy.m_pSelector;
    m_context   = copy.m_context;
    m_pAddress  = copy.m_pAddress;
    return *this;
  }
  virtual IDataStreamTool::size_type ID()   const   {
    return m_streamID;
  }
  long numEvent()  const    {
    return m_count;
  }
  long numStreamEvent()  const    {
    return m_strCount;
  }
  void* identifier() const  {
    return (void*)m_pSelector;
  }
};
#endif // GAUDISVC_EVENTSELECTOR_EVENTITERATOR_H