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CdbRooSimpleConverter.cc

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// File and Version Information:
//      $Id: CdbRooSimpleConverter.cc,v 1.1 2005/07/14 16:11:05 jtinslay Exp $

/// The implementation of the CdbBdb2RooPayloadConverterPTR class.
/**
  * @see CdbBdb2RooPayloadConverterPTR
  */
#include "BaBar/BaBar.hh"

#include "CdbRooConversionFwk/CdbRooSimpleConverter.hh"

template < class P,
           class T,
           class R >           
CdbStatus
CdbRooSimpleConverter<P,T,R>::userDefinedConversion( const BdbRef(BdbObject)& theInputObjectRef,
                                                           R*&                      theOutputObjectPtr ) const
{
  // Try to get to the final type. Complain to a caller in case of a type
  // mismatch (the assignment operator/c-tor will detect it).

    const BdbHandle(P) inputObjectH = (const BdbRef(P)&)theInputObjectRef;
    if( !inputObjectH.isValid( )) return CdbStatus::IllegalParameters;

  // Try getting the "mediator" object. If the input persistent class's interface
  // doesn't have the corresponding method the compiler will complain right below.
  //
  // We're expecting that the following form of the method to exist:
  //
  //   class P  ... {
  //   puiblic:
  //     T* transient( ) const;
  //   };

    T* t = inputObjectH->transient( );

  // Create an output object. If the output persistent class's interface
  // doesn't have the corresponding method the compiler will complain right below.
  //
  // We're expecting that the following form of the c-tor to exist:
  //
  //   class R  ... {
  //   puiblic:
  //     R( const T& );
  //   };

    theOutputObjectPtr = new R( *t );

  // The "mediator" type should have a public destructor:
  //
  //   class T {
  //   public:
  //     ~T();
  //   };

    delete t;

    return CdbStatus::Success;
}

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// End Of File //
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