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SmartDataPtr.h

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//      ====================================================================
//      SmartDataPtr.h
//      --------------------------------------------------------------------
//
//      Package    : Gaudi/DataSvc ( The LHCb Offline System)
//
//  Description: Implementation of a smart pointer class to access
//               easily (and efficiently) data stores.
//
//      Author     : M.Frank
//      ====================================================================
#ifndef DATASVC_SMARTDATAPTR_H
#define DATASVC_SMARTDATAPTR_H 1

// Framework include files
#include "GaudiKernel/SmartDataStorePtr.h"

template<class TYPE> class SmartDataPtr : public SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>    {
public:
  SmartDataPtr(IDataProviderSvc* pService, const std::string& fullPath)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( pService,0,fullPath)
  {
  }
  SmartDataPtr(IDataProviderSvc* pService, IDataDirectory* pDirectory)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( pService,pDirectory,"")
  {
  }
  SmartDataPtr(IDataProviderSvc* pService, DataObject* pObject, const std::string& path)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( pService,0,path)
  {
    if ( 0 != pObject )   {
      m_pDirectory = pObject->directory();
    }
  }
  SmartDataPtr(SmartDataObjectPtr& refObject, IDataDirectory* pDirectory)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( refObject.service(), pDirectory, "")
  {
  }
  SmartDataPtr(SmartDataObjectPtr& refObject, const std::string& path)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( refObject.service(), refObject.directory(), path)
  {
  }
  SmartDataPtr(const SmartDataObjectPtr& copy)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( copy )
  {
  }
  virtual ~SmartDataPtr()   {
  }
  template <class OTHER>
  SmartDataPtr& operator=( OTHER* pObj )    {
    m_pObject = dynamic_cast<TYPE*>(pObj);
    return *this;
  }
};

#endif // DATASVC_SMARTDATAPTR_H

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