AliHMPIDDigitN no longer needed

[u/mrichter/AliRoot.git] / PWG0 / AliEmptySelector.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

// The ESD is available as member fESD
//
// The Process function is nearly empty. Implement your analysis there and look at the other listed below functions you
// might need.
//
// The following methods can be overrriden. Please do not forgot to call the base class function.
//
//    Begin():        called everytime a loop on the tree starts,
//                    a convenient place to create your histograms.
//    SlaveBegin():   called after Begin(), when on PROOF called only on the
//                    slave servers.
//    Init():         called for each new tree. Enable/Disable branches here.
//    Process():      called for each event, in this function you decide what
//                    to read and fill your histograms.
//    SlaveTerminate: called at the end of the loop on the tree, when on PROOF
//                    called only on the slave servers.
//    Terminate():    called at the end of the loop on the tree,
//                    a convenient place to draw/fit your histograms.
//
//  Author: Jan.Fiete.Grosse-Oetringhaus@cern.ch

#include "AliEmptySelector.h"

#include <AliLog.h>
#include <AliESD.h>

ClassImp(AliEmptySelector)

AliEmptySelector::AliEmptySelector() :
  AliSelector()
{
  //
  // Constructor. Initialization of pointers
  //
}

AliEmptySelector::~AliEmptySelector()
{
  //
  // Destructor
  //
}

Bool_t AliEmptySelector::Process(Long64_t entry)
{
  //
  // Implement your analysis here. Do not forget to call the parent class Process by
  // if (AliSelector::Process(entry) == kFALSE)
  //   return kFALSE;
  //

  if (AliSelector::Process(entry) == kFALSE)
    return kFALSE;

  // Check prerequisites
  if (!fESD)
  {
    AliDebug(AliLog::kError, "ESD branch not available");
    return kFALSE;
  }

  printf("In event %d we have %d ESD tracks.\n", (Int_t) entry, fESD->GetNumberOfTracks());

  return kTRUE;
}