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CdbBdbObjectTranslatorP2T.hh

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#ifndef CDB_BDB_OBJECT_TRANSLATOR_P2T_HH
#define CDB_BDB_OBJECT_TRANSLATOR_P2T_HH

// File and Version Information:
//      $Id: CdbBdbObjectTranslatorP2T.hh,v 1.1 2005/05/03 21:15:14 gapon Exp $

#include "CdbBdb/CdbBdbObjectTranslatorPT.hh"

/// A simpple implementation of persistent-to-transient translators
/**
  * This class is a specialization of generic "persistent-to-transient"
  * translators for persistent classes having the following minimal interface:
  *
  *   class T;
  *   class P : public BdbObject {
  *   public:
  *     T* transient() const;
  *   };
  *
  * Where:
  *
  *   T - is a transient type
  *   P - is a persistent type
  *
  * @see class CdbBdbObjectTranslatorPT
  */
template< class P,
          class T >
class CdbBdbObjectTranslatorP2T : public CdbBdbObjectTranslatorPT<P,T> {

private:

  /// Copy constructor (NOT IMPLEMENTED)

    CdbBdbObjectTranslatorP2T( const CdbBdbObjectTranslatorP2T<P,T>& );

  /// Assignment operator (NOT IMPLEMENTED)

    CdbBdbObjectTranslatorP2T<P,T>& operator=( const CdbBdbObjectTranslatorP2T<P,T>& );

public:

  /// Default constructor
  /**
    * @see CdbBdbObjectTranslatorPT::CdbBdbObjectTranslatorPT()
    */
    CdbBdbObjectTranslatorP2T(  ) :
         CdbBdbObjectTranslatorPT<P,T>( )
    { }

  /// Destructor

    virtual ~CdbBdbObjectTranslatorP2T( ) { }

protected:

  /// Translate into a transient object (persistent & transient type specific translation)
  /**
    * Implement the corresponding method defined in the base class.
    *
    * @see CdbBdbObjectTranslatorPT::toTransientPT()
    */
    virtual CdbStatus toTransientPT( T*&                 theTransientPtr,
                                     const BdbHandle(P)& theObjectH ) const
    {
        theTransientPtr = theObjectH->transient( );
        return ( 0 == theTransientPtr ? CdbStatus::Error : CdbStatus::Success );
    }
};

#endif  // CDB_BDB_OBJECT_TRANSLATOR_P2T_HH

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