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// Author: Dariusz Miskowiec <mailto:d.miskowiec@gsi.de> 2007

//=============================================================================
// parent class of all analyzers
// keeps the obj array of histograms filled by the daughter
// takes care of storing them on file at the end
//=============================================================================

#include <TROOT.h>
#include <TFile.h>
#include <TCollection.h>
#include <TClass.h>
#include <TH1.h>
#include "AliUnicorHN.h"
#include "AliUnicorAnal.h"

ClassImp(AliUnicorAnal)
  
TDatabasePDG AliUnicorAnal::fgPDG;

//=============================================================================
AliUnicorAnal::AliUnicorAnal(const char *nam) : TNamed(nam,nam), fHistos() {

  // constructor

  fHistos.SetOwner(1);
  TDirectory *dir = gROOT->mkdir(GetName());
  dir->cd();
  printf("%s object named %s created\n",ClassName(),GetName());
}
//=============================================================================
Long64_t AliUnicorAnal::Merge(const TCollection * const list) {

  // sumup fHistos objects

  for (int i=0; i<fHistos.GetEntries(); i++) {
    if (fHistos.At(i)->IsA()->InheritsFrom("TH1")) {
      TH1 *hi = (TH1*) fHistos.At(i);
      TIter next(list);
      while (AliUnicorAnal *analtoadd = (AliUnicorAnal*) next()) {
	TH1 *histotoadd = (TH1*) analtoadd->GetHist(i);
	hi->Add(histotoadd);
      }
    }
  }
  return 0;
}
//=============================================================================
void AliUnicorAnal::Save(const char *outfil, const char *mode) {

  // store histograms on file in a directory named after the object
  // mode should be "update" (default) or "new"

  printf("%s %s: saving histograms on %s (%s)\n",ClassName(),GetName(),outfil,mode);  
  TFile * f = TFile::Open(outfil, mode);
  TDirectory *dest = f->mkdir(GetName());
  dest->cd();
  for (int i=0; i<fHistos.GetEntries(); i++) {
    TObject *obj = fHistos.At(i);
    if (obj->IsA()->InheritsFrom("AliUnicorHN")) ((AliUnicorHN*) obj)->Save();
    else obj->Write();
  }
  gROOT->cd();
  f->Close();
}
//=============================================================================