/**************************************************************************
 * 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.                  *
 **************************************************************************/


// --- ROOT system ---
#include <TClass.h>
#include <TH1F.h> 
#include <TH1I.h> 
#include <TIterator.h> 
#include <TKey.h> 
#include <TFile.h> 

// --- Standard library ---

// --- AliRoot header files ---
#include "AliLog.h"
#include "AliQA.h"
#include "AliQAChecker.h"
#include "AliZDCQAChecker.h"

ClassImp(AliZDCQAChecker)

//__________________________________________________________________
AliZDCQAChecker& AliZDCQAChecker::operator = (const AliZDCQAChecker& qac )
{
  // Equal operator.
  this->~AliZDCQAChecker();
  new(this) AliZDCQAChecker(qac);
  return *this;
}


//____________________________________________________________________________
const Double_t AliZDCQAChecker::Check(AliQA::ALITASK_t /*index*/, TObjArray * list) 
{
  // Checks the QA histograms on the input list: 
  //
  Double_t test = 0.;
  Int_t count = 0; 
  
  if(list->GetEntries() == 0){  
    AliWarning("The list to be checked is empty!");
    test = 1.; // nothing to check
  }
  else{
    TIter next(list); 
    TH1 * hdata;
    count = 0; 
    while((hdata = dynamic_cast<TH1 *>(next()))){
      if(hdata){ 
	Double_t rv = 0.;
	if(hdata->GetEntries()>0) rv=1; 
	AliInfo(Form("%s -> %f", hdata->GetName(), rv)); 
	count++; 
	test += rv; 
      }
      else{
	AliError("Data type cannot be processed");
      }
    }
    if(count!=0){ 
      if(test==0){
	AliWarning("Histograms to be checked are empty!!!");
	test = 0.5;  //upper limit value to set kWARNING flag for a task
      }
      else {
	test /= count;
      }
    }
  }

  AliInfo(Form("Test Result = %f", test)); 
  return test; 
}