EvtCollectionStream.cpp

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//  ====================================================================
//  EvtCollectionStream.cpp
//  --------------------------------------------------------------------
//
//  Package   : GaudiSvc/PersistencySvc
//
//  Author    : Markus Frank
//
//  ====================================================================
#define GAUDISVC_PERSISTENCYSVC_EVTCOLLECTIONSTREAM_CPP

// Framework include files
#include "GaudiKernel/MsgStream.h"
#include "GaudiKernel/INTupleSvc.h"
#include "GaudiKernel/IDataProviderSvc.h"

#include "GaudiKernel/DataStoreItem.h"
#include "EvtCollectionStream.h"

// Define the algorithm factory for the standard output data writer
DECLARE_COMPONENT(EvtCollectionStream)

// Standard Constructor
EvtCollectionStream::EvtCollectionStream(const std::string& name, ISvcLocator* pSvcLocator)
: Algorithm(name, pSvcLocator)
{
  m_storeName = "TagCollectionSvc";
  declareProperty("ItemList",   m_itemNames);
  declareProperty("EvtDataSvc", m_storeName);
}

// initialize data writer
StatusCode EvtCollectionStream::initialize() {
  // Use the Job options service to set the Algorithm's parameters
  setProperties();
  // Get access to the DataManagerSvc
  m_pTupleSvc = serviceLocator()->service(m_storeName);
  if( !m_pTupleSvc ) {
    fatal() << "Unable to locate IDataManagerSvc interface" << endmsg;
    return StatusCode::FAILURE;
  }
  // Clear the item list
  clearItems();
  // Take the new item list from the properties.
  for(const auto& i : m_itemNames) addItem( i );
  info() << "Data source:             " << m_storeName  << endmsg;
  return StatusCode::SUCCESS;
}

// terminate data writer
StatusCode EvtCollectionStream::finalize()    {
  m_pTupleSvc = nullptr; // release
  clearItems();
  return StatusCode::SUCCESS;
}

// Work entry point
StatusCode EvtCollectionStream::execute() {
  StatusCode status = (m_pTupleSvc) ? StatusCode::SUCCESS : StatusCode::FAILURE;
  if ( status.isSuccess() )   {
    for ( const auto& i : m_itemList) {
      StatusCode iret = m_pTupleSvc->writeRecord(i->path());
      if ( !iret.isSuccess() ) status = iret;
    }
  }
  return status;
}

// Remove all items from the output streamer list;
void EvtCollectionStream::clearItems()     {
  m_itemList.clear();
}

// Add item to output streamer list
void EvtCollectionStream::addItem(const std::string& descriptor)   {
  auto  sep = descriptor.rfind("#");
  int level = 0;
  std::string obj_path = descriptor.substr(0,sep);
  if ( sep != std::string::npos ) {
    std::string slevel = descriptor.substr(sep+1) ;
    if ( slevel == "*" )  {
       level = 9999999;
    }
    else   {
       level = std::stoi(slevel);
    }
  }
  m_itemList.emplace_back( new DataStoreItem(obj_path, level) );
  const auto& item = m_itemList.back();
  info() << "Adding OutputStream item " << item->path()
      << " with " << item->depth()
      << " level(s)." << endmsg;
}