JobInputRoot.cxx

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// #include "GaudiKernel/IJobOptionsSvc.h"
#include "GaudiKernel/ISvcLocator.h"
// #include "GaudiKernel/Property.h"
#include "GaudiKernel/SmartIF.h"
#include "TFile.h"
#include "TTree.h"
#include <cstdlib>
 
namespace DetVerSvcPack {
 
  int getRunFromFileList( const std::string& flist ) {
    std::string::size_type p1 = flist.find( '"' ) + 1;
    std::string::size_type p2 = flist.find( '"', p1 );
    std::string            fn = flist.substr( p1, p2 - p1 );
 
    TFile* file = TFile::Open( fn.c_str(), "READ" );
    TTree* tree = (TTree*)file->Get( "Event" );
    tree->SetMakeClass( 1 );
    int run;
    tree->SetBranchAddress( "m_runId", &run );
    tree->GetEntry( 0 );
 
    return abs( run );
  }
 
  int funcInputRoot( ISvcLocator* svcLct ) {
    SmartIF<IJobOptionsSvc> iSvc( svcLct->service( "JobOptionsSvc" ) );
    if ( iSvc.isValid() )
    {
      const std::vector<const Property*>*          ps = iSvc->getProperties( "EventCnvSvc" );
      std::vector<const Property*>::const_iterator it, end = ps->end();
      for ( it = ps->begin(); it != end; ++it )
      {
        if ( ( *it )->name() == "digiRootInputFile" )
        { return getRunFromFileList( ( *it )->toString() ); }
      }
    }
    return -1;
  }
 
  extern int ( *pf_helper )( ISvcLocator* );
 
  // initialize function pointer: pf_helper
  struct InputRootInit {
    InputRootInit() { pf_helper = funcInputRoot; }
  };
 
  InputRootInit init;
} // namespace DetVerSvcPack