ExampleAlg.cxx

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/*
 * Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration.
 */
 
 
#include "ExampleAlg.h"
 
 
StatusCode ExampleAlg::initialize()
{
  // This will check that the properties were initialized properly
  // by job condifiguration.
  ATH_CHECK( m_readKey.initialize() );
  ATH_CHECK( m_writeKey.initialize() );
  return StatusCode::SUCCESS;
}
 
 
StatusCode ExampleAlg::execute (const EventContext& ctx) const
{
  // Construct handles from the keys.
  // Since this is a reentrant algorithm, we have an explicit event context,
  // which we pass to the handles.
  SG::ReadHandle<MyDataObj> h_read (m_readKey, ctx);
  SG::WriteHandle<MyDataObj> h_write (m_writeKey, ctx);
 
  // Now we can dereference the read handle to access input data.
  int newval = h_read->val()+1;
 
  // We make a new object, held by a unique_ptr, and record it
  // in the store using the record method of the handle.
  ATH_CHECK( h_write.record (std::make_unique<MyDataObj> (newval)) );
 
  return StatusCode::SUCCESS;
}