DataHandleProperty.cpp

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* (c) Copyright 1998-2024 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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#include <GaudiKernel/DataHandleProperty.h>
 
#include <Gaudi/Parsers/CommonParsers.h>
#include <GaudiKernel/DataHandle.h>
#include <GaudiKernel/System.h>
 
#include <sstream>
 
namespace Gaudi {
  namespace Parsers {
    StatusCode parse( DataHandle& v, std::string_view s ) {
      DataObjID id;
      auto      sc = parse( id, s );
      if ( sc ) v.setKey( std::move( id ) );
      return sc;
    }
  } // namespace Parsers
 
  namespace Utils {
    std::ostream& toStream( const Gaudi::DataHandle& v, std::ostream& o ) { return o << v; }
  } // namespace Utils
} // namespace Gaudi
 
//---------------------------------------------------------------------------
 
DataHandleProperty::DataHandleProperty( const std::string& name, Gaudi::DataHandle& ref )
    : PropertyWithHandlers( name, typeid( ref ) ), m_pValue( &ref ) {}
 
//---------------------------------------------------------------------------
 
StatusCode DataHandleProperty::fromString( const std::string& s ) {
  if ( !Gaudi::Parsers::parse( *m_pValue, s ).isSuccess() ) { return StatusCode::FAILURE; }
  return useUpdateHandler() ? StatusCode::SUCCESS : StatusCode::FAILURE;
}
 
//---------------------------------------------------------------------------
 
bool DataHandleProperty::setValue( const Gaudi::DataHandle& value ) {
  *m_pValue = value;
  return useUpdateHandler();
}
 
//---------------------------------------------------------------------------
 
std::string DataHandleProperty::toString() const {
  useReadHandler();
  return m_pValue->objKey();
}
 
//---------------------------------------------------------------------------
void DataHandleProperty::toStream( std::ostream& out ) const {
  // implicitly invokes useReadHandler()
  out << toString();
}
 
//---------------------------------------------------------------------------
 
DataHandleProperty& DataHandleProperty::operator=( const Gaudi::DataHandle& value ) {
  setValue( value );
  return *this;
}
 
//---------------------------------------------------------------------------
 
DataHandleProperty* DataHandleProperty::clone() const { return new DataHandleProperty( *this ); }
 
//---------------------------------------------------------------------------
 
bool DataHandleProperty::load( Gaudi::Details::PropertyBase& destination ) const { return destination.assign( *this ); }
 
//---------------------------------------------------------------------------
 
bool DataHandleProperty::assign( const Gaudi::Details::PropertyBase& source ) {
  return fromString( source.toString() ).isSuccess();
}
 
//---------------------------------------------------------------------------
 
const Gaudi::DataHandle& DataHandleProperty::value() const {
  useReadHandler();
  return *m_pValue;
}