AthCommonDataStore.icc

Go to the documentation of this file.

/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
/** @class  AthCommonDataStore
 *  @file   AthenaBaseComps/AthCommonDataStore.icc
 *  @author Charles Leggett
 *  @date   June 2018
 *  @brief  Templated class that provides access to Athena event stores
 *          and ability to set data dependencies via Properites.
 *          Implemented to reduce code duplication in AthAlgorithm, 
 *          AthAlgTool, and AthReEntrantAlgorithm
 */
 
#ifndef ATHENABASECOMPS_ATHCOMMONDATASTORE_ICC
#define ATHENABASECOMPS_ATHCOMMONDATASTORE_ICC
 
#include "AthenaBaseComps/VHKASupport.h"
#include "AthenaBaseComps/AthAlgStartVisitor.h"
 
template <class PBASE>
void AthCommonDataStore<PBASE>::extraDeps_update_handler( Gaudi::Details::PropertyBase& ExtraDeps ) 
  {
    DataObjIDColl newColl;
    Gaudi::Property<DataObjIDColl> *prop = dynamic_cast<Gaudi::Property<DataObjIDColl>*> (&ExtraDeps);
    if ( prop ) {
      for (auto id : prop->value()) {
        SG::VarHandleKey vhk(id.clid(), id.key(), Gaudi::DataHandle::Reader);
        id.updateKey( vhk.objKey() );
        newColl.emplace( id );
      }
      if (newColl.size() != 0) prop->setValue( newColl );
    } else {
      ATH_MSG_ERROR("unable to dcast ExtraInput/Output Property");
    }
  }
 
/**
 * @brief Perform system initialization for an algorithm.
 */
template <class PBASE>
StatusCode AthCommonDataStore<PBASE>::sysInitialize() {
  ATH_CHECK( PBASE::sysInitialize() );
  
  for ( SG::VarHandleKeyArray* a: m_vhka ) {
    a->declare( this );
  }
  
  m_varHandleArraysDeclared = true;
  
  return StatusCode::SUCCESS;
}
 
/**
 * @brief Handle START transition.
 */
template <class PBASE>
StatusCode AthCommonDataStore<PBASE>::sysStart() {
  ATH_CHECK( PBASE::sysStart() );
  
  // Call start() on all input handles.
  // This allows CondHandleKeys to cache pointers to their conditions containers.
  // (CondInputLoader makes the containers that it creates during start(),
  // so initialize() is too early for this.)
  
  AthAlgStartVisitor visitor(this);
  this->acceptDHVisitor (&visitor);
 
  return StatusCode::SUCCESS;
}
 
/**
 * @brief Return this algorithm's input handles.
 */
template <class PBASE>
std::vector<Gaudi::DataHandle*> AthCommonDataStore<PBASE>::inputHandles() const
{
  std::vector<Gaudi::DataHandle*> v = PBASE::inputHandles();
 
  if (!m_varHandleArraysDeclared) {
    VHKASupport::insertInput( m_vhka, v );
  }
 
  return v;
}
 
/**
 * @brief Return this algorithm's output handles.
 */
template <class PBASE>
std::vector<Gaudi::DataHandle*> AthCommonDataStore<PBASE>::outputHandles() const
{
  std::vector<Gaudi::DataHandle*> v = PBASE::outputHandles();
 
  if (!m_varHandleArraysDeclared) {    
    VHKASupport::insertOutput( m_vhka, v );
  }
 
  return v;
}
 
 
#endif