SmartDataPtr.h

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

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

template<class TYPE> class SmartDataPtr : public SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>    {
public:

#ifndef __ICC
  // icc doesn't like this line, it fails with
  // SmartDataPtr.h(147): internal error: assertion failed: add_symbol_to_overload_list:
  //   symbol not in symbol header list (shared/edgcpfe/symbol_tbl.c, line 4804)
  using SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>::operator=;
#endif

  SmartDataPtr(IDataProviderSvc* pService, const std::string& fullPath)
    : SmartDataStorePtr<TYPE,SmartDataObjectPtr::ObjectLoader>( pService,0,fullPath)
  {
  }

  SmartDataPtr(IDataProviderSvc* pService, IRegistry* 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 )   {
      this->m_pRegistry = pObject->registry();
    }
  }
  
  SmartDataPtr(SmartDataObjectPtr& refObject, IRegistry* 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 )    {
    this->m_pObject = dynamic_cast<TYPE*>(pObj);
    return *this;
  }

  template <class OTHER>
  SmartDataPtr& operator=( const OTHER* pObj )    {
    this->m_pObject = dynamic_cast<TYPE*>(const_cast<OTHER*>(pObj));
    return *this;
  }
};

#endif // GAUDIKERNEL_SMARTDATAPTR_H