// $Id: TGo4EventElement.cxx 760 2011-06-22 12:03:48Z linev $
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum für Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------

#include "TGo4EventElement.h"

#include "TTree.h"


R__EXTERN TTree *gTree;

TGo4EventElement::TGo4EventElement() :
   TNamed("Go4Element","This is a Go4 EventElement"),
   fbIsValid(kTRUE),
   fxParent(0),
   fxEventSource(0),
   fIdentifier(-1),
   fDebug(kFALSE)
{
}

TGo4EventElement::TGo4EventElement(const char* name) :
   TNamed(name,"This is a Go4 EventElement"),
   fbIsValid(kTRUE),
   fxParent(0),
   fxEventSource(0),
   fIdentifier(-1),
   fDebug(kFALSE)
{
}

TGo4EventElement::TGo4EventElement(const char* aName, const char* aTitle, Short_t aBaseCat) :
   TNamed(aName,aTitle),
   fbIsValid(kTRUE),
   fxParent(0),
   fxEventSource(0),
   fIdentifier(aBaseCat),
   fDebug(kFALSE)
{
}

TGo4EventElement::~TGo4EventElement()
{
}

Bool_t TGo4EventElement::CheckEventSource(const char* classname)
{
   return kFALSE;
}

void TGo4EventElement::PrintEvent()
{
}

void TGo4EventElement::Print(Option_t* option) const
{
   ((TGo4EventElement*)this) -> PrintEvent();
}

void TGo4EventElement::makeBranch(TBranch *parent)
{
   // method for recursive branching algorithm

}

void TGo4EventElement::synchronizeWithTree(TTree *tree, TGo4EventElement** var_ptr)
{

   if (tree==0) return;

   TBranch* topb = 0;
   TString searchname = GetName();
   if (searchname.Length()>0) {
      searchname += ".";
      topb = tree->FindBranch(searchname.Data());
   }

   // if no appropriate branches found, use first branch for the event
   // TODO: should we check class name of the branch?
   if (topb==0) topb = (TBranch*) tree->GetListOfBranches()->First();

   Int_t index = tree->GetListOfBranches()->IndexOf(topb);

   // FIXME SL: should we activate other branches, reading not working when all branches disabled in the beginning
   // note: only deactivate subleafs _after_ address of top branch is set!
   // tree->SetBranchStatus("*",0);

   activateBranch(topb, index, var_ptr);
}

/** THIS WAS OLD CODE FROM TGo4FileSource

void TGo4EventElement::synchronizeWithTree(TTree *tree, TGo4EventElement** var_ptr)

TString topname;
Bool_t masterbranch=kFALSE;
TString branchName = dest->GetName();
if(!fxBranchName.Contains("."))  {
   fxBranchName+="."; // for master branch, add dot. Subbranch names with dot separators do not get final dot
   masterbranch=kTRUE;
}
TObjArray* blist = tree->GetListOfBranches();
TBranch* topb = (TBranch*) blist->At(0);
if(topb) {
   topname = topb->GetName();
   //cout <<"Activating top branch "<<topname.Data() << endl;
   tree->SetBranchAddress(topname.Data(),(void**) var_ptr);
   //topb->SetAddress(&fxTopEvent); // this will not set address of possible cloned tree. we use the set address of the tree
}
tree->SetBranchStatus("*",0); // note: only deactivate subleafs _after_ address of top branch is set!
tree->SetBranchStatus(topname.Data(),1); // required to process any of the subbranches!
TString wildbranch = branchName;
wildbranch += "*";
tree->SetBranchStatus(wildbranch.Data(),1);
//cout <<"Build event activates: "<<wildbranch.Data() << endl;
wildbranch = branchName;
if(!masterbranch) wildbranch+=".";
wildbranch+="*";
tree->SetBranchStatus(wildbranch.Data(),1);
//cout <<"Build event activates: "<<wildbranch.Data() << endl;
fbActivated = kTRUE;

*/


Int_t TGo4EventElement::activateBranch(TBranch *branch, Int_t init, TGo4EventElement** var_ptr)
{
   if (branch==0) return 0;

   TString cad = branch->GetName();

   TTree* tree = branch->GetTree();

   if (var_ptr!=0)
      tree->SetBranchAddress(cad.Data(), (void**)var_ptr);

   tree->SetBranchStatus(cad.Data(), 1);
   cad+="*";
   tree->SetBranchStatus(cad.Data(), 1);

   return 0;
}

void TGo4EventElement::deactivate()
{
   TString name = GetName();
   name+=".";
   gTree->SetBranchStatus(name.Data(), 0);
   name+="*";
   gTree->SetBranchStatus(name.Data(), 0);
}

void TGo4EventElement::activate()
{
   TString name=GetName();
   name+=".";
   gTree->SetBranchStatus(name.Data(), 1);
   name+="*";
   gTree->SetBranchStatus(name.Data(), 1);
}

void TGo4EventElement::Clear(Option_t *)
{
}

Int_t TGo4EventElement::Init()
{
   Int_t res(0);
   Clear();
   SetValid(kTRUE);
   if (fxEventSource) {
   } else {
      res = 1;
   }
   return res;
}

Int_t TGo4EventElement::Fill()
{
   Clear();

   if (fxEventSource==0) { SetValid(kFALSE); return 1; }


   Int_t res =0; 
   SetValid(kFALSE);

   return res==0 ? 1 : res;
}