Update of package classes.

[u/mrichter/AliRoot.git] / PWG2 / RESONANCES / AliRsnPairFunctions.cxx

//
// *** Class AliRsnPairFunctions ***
//
// "Core" method for defining the work on a pari of particles.
// For one analysis, one must setup one of this for each pair he wants to analyze,
// adding to it all analysis which he desires to do.
// Here he defines the cuts, and the particle types and charges, and can add
// functions which do different operations on the same pair, and some binning
// with respect to some kinematic variables (eta, momentum)
//
// authors: A. Pulvirenti (email: alberto.pulvirenti@ct.infn.it)
//          M. Vala (email: martin.vala@cern.ch)
//

#include <TList.h>

#include "AliLog.h"

#include "AliRsnMother.h"
#include "AliRsnEvent.h"
#include "AliRsnFunction.h"
#include "AliRsnCutSet.h"
#include "AliRsnValue.h"

#include "AliRsnPairFunctions.h"

ClassImp(AliRsnPairFunctions)

//_____________________________________________________________________________
AliRsnPairFunctions::AliRsnPairFunctions(const char *name, AliRsnPairDef *def) :
  AliRsnPair(name, def),
  fFunctions("AliRsnFunction", 0)
{
//
// Default constructor
//

  AliDebug(AliLog::kDebug+2,"<-");
  AliDebug(AliLog::kDebug+2,"->");
}

//_____________________________________________________________________________
AliRsnPairFunctions::AliRsnPairFunctions(const AliRsnPairFunctions& copy) :
  AliRsnPair(copy),
  fFunctions(copy.fFunctions)
{
//
// Default constructor
//

  AliDebug(AliLog::kDebug+2,"<-");
  AliDebug(AliLog::kDebug+2,"->");
}

//_____________________________________________________________________________
AliRsnPairFunctions& AliRsnPairFunctions::operator=(const AliRsnPairFunctions& copy)
{
  AliRsnPair::operator=(copy);

  Int_t i, n = copy.fFunctions.GetEntries();
  for (i = 0; i < n; i++)
  {
    AliRsnFunction *fcn = (AliRsnFunction*)copy.fFunctions[i];
    if (fcn) AddFunction(fcn);
  }

  return (*this);
}

//_____________________________________________________________________________
AliRsnPairFunctions::~AliRsnPairFunctions()
{
//
// Destructor
//

  AliDebug(AliLog::kDebug+2,"<-");
  AliDebug(AliLog::kDebug+2,"->");
}

//_____________________________________________________________________________
void AliRsnPairFunctions::Compute()
{
//
// Makes computations using the two passed daughter objects.
// Checks all cuts and then computes the corresponding pair object
// and then fill the list of required values using it.
//
  
  AliDebug(AliLog::kDebug+2,"<-");
  
  TObjArrayIter   nextFcn(&fFunctions);
  AliRsnFunction *fcn = 0x0;
  
  while ((fcn = (AliRsnFunction*)nextFcn())) 
  {
    fcn->SetPairDef(fPairDef);
    fcn->SetPair(&fMother);
    fcn->SetEvent(fEvent);
    fcn->Fill();
  }

  AliDebug(AliLog::kDebug+2,"->");
}

//_____________________________________________________________________________
void AliRsnPairFunctions::Init(const char *prefix, TList *list)
{
//
// Generates needed histograms, giving them a name based on
// the flags defined here, on the pair definition, and attaches
// a prefix to it, according to the argument.
//
// All generated histograms are stored into the output TList.
//

  AliDebug(AliLog::kDebug+2,"<-");

  Int_t  i;
  TString hName("");
  AliRsnFunction *fcn = 0;
  for (i = 0; i < fFunctions.GetEntries(); i++)
  {
    fcn = (AliRsnFunction*)fFunctions.At(i);
    hName += prefix;
    hName += '_';
    hName += GetName();
    hName += '_';
    hName += fcn->GetName();
    if (fcn->IsUsingTH1()) list->Add(fcn->CreateHistogram(hName.Data(), ""));
    else list->Add(fcn->CreateHistogramSparse(hName.Data(), ""));
  }

  AliDebug(AliLog::kDebug+2,"->");
}

//_____________________________________________________________________________
void AliRsnPairFunctions::AddFunction(AliRsnFunction *const fcn)
{
//
// Adds a new computing function
//

  AliDebug(AliLog::kDebug+2,"<-");
  
  fFunctions.Print();
  Int_t size = fFunctions.GetEntries();
  new(fFunctions[size]) AliRsnFunction(*fcn);
  
  AliDebug(AliLog::kDebug+2,"->");
}