#define TestSelector_cxx
// The class definition in TestSelector.h has been generated automatically
// by the ROOT utility TTree::MakeSelector(). This class is derived
// from the ROOT class TSelector. For more information on the TSelector
// framework see $ROOTSYS/README/README.SELECTOR or the ROOT User Manual.


// The following methods are defined in this file:
//    Begin():        called every time 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.
//    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.
//
// To use this file, try the following session on your Tree T:
//
// root> T->Process("TestSelector.C")
// root> T->Process("TestSelector.C","some options")
// root> T->Process("TestSelector.C+")
//


#include "TestSelector.h"
#include <TH2.h>
#include <TStyle.h>

void TestSelector::Begin(TTree * /*tree*/)
{
   // The Begin() function is called at the start of the query.
   // When running with PROOF Begin() is only called on the client.
   // The tree argument is deprecated (on PROOF 0 is passed).

   TString option = GetOption();
}

void TestSelector::SlaveBegin(TTree * /*tree*/)
{
   // The SlaveBegin() function is called after the Begin() function.
   // When running with PROOF SlaveBegin() is called on each slave server.
   // The tree argument is deprecated (on PROOF 0 is passed).

	printf("Slaves start!!! \n"); 
	

   TString option = GetOption();


   // initialize the array for histograms
   yapArray = new TObjArray; 

   h2 = new TH2D("h2", 
				 "", 
				 20, 0, 20, 
				 20, 0, 20); 
   yapArray->Add(h2); 

   GetOutputList()->Add(h2); 

   // add to output list
   AddToOutputList(yapArray); 


}

Bool_t TestSelector::Process(Long64_t entry)
{
   // The Process() function is called for each entry in the tree (or possibly
   // keyed object in the case of PROOF) to be processed. The entry argument
   // specifies which entry in the currently loaded tree is to be processed.
   // When processing keyed objects with PROOF, the object is already loaded
   // and is available via the fObject pointer.
   //
   // This function should contain the \"body\" of the analysis. It can contain
   // simple or elaborate selection criteria, run algorithms on the data
   // of the event and typically fill histograms.
   //
   // The processing can be stopped by calling Abort().
   //
   // Use fStatus to set the return value of TTree::Process().
   //
   // The return value is currently not used.

   fReader.SetEntry(entry);

   h2->Fill(10, 10); 

   return kTRUE;
}

void TestSelector::SlaveTerminate()
{
   // The SlaveTerminate() function is called after all entries or objects
   // have been processed. When running with PROOF SlaveTerminate() is called
   // on each slave server.

}

void TestSelector::Terminate()
{
   // The Terminate() function is the last function to be called during
   // a query. It always runs on the client, it can be used to present
   // the results graphically or save the results to file.

	TFile *outroot = new TFile("processed.root", 
							   "RECREATE"); 
	
	// loop over output list
	//	TIter next(GetOutputList()); 
	//	while(TObject *obj = next()) {
	//	obj->Write(); 
	//	}

	fOutput->Print(); 


	outroot->Close(); 
	gApplication->Terminate();
}

void TestSelector::AddToOutputList(TObjArray *iArray) {
	TIter next(iArray); 

	while (TH2D *hist = (TH2D*)next()) {
        GetOutputList()->Add(hist);
	}
}