// ----------------------------------------------------------------------------
// $Id: LCDreadRootFile.cxx,v 1.1 2001/05/10 20:40:01 toshi Exp $
// ----------------------------------------------------------------------------
//
// $Log: LCDreadRootFile.cxx,v $
// Revision 1.1  2001/05/10 20:40:01  toshi
// C++ file name convention has been changed from *.C to *.cxx .
//
//
//  Get input from root file.

// Version 0.00 18-Nov-1998 RXD Creation
//              31-Mar-1999 jrb Move to Util (libRootAppsUtil)

#include <iostream.h>

#include "LCDreadRootFile.h"
#include "TBranch.h"

ClassImp(LCDreadRootFile)

//______________________________________________________________________
// readRootFile 
//
// EventSource reading from root file

 LCDreadRootFile::LCDreadRootFile(Char_t* rootFileName, LCDEvent* event) {
  // constructor

  FILE* parFile = fopen(rootFileName,"r");

  if(!(parFile)){
    printf("Root file %s could not be openedn", rootFileName);
    return;
  }
  
  fclose(parFile);
  //   int parfileStatus = fclose(parFile);
      
  // set up root

  if (event == 0) {
    m_event = new LCDEvent();
    m_ownevent=kTRUE;
  } else {
    m_event = event;
    m_ownevent=kFALSE;
  }

  m_rootFile = new TFile(rootFileName);
  T = (TTree*)m_rootFile->Get("T");
  T->SetBranchAddress("LCDEvent",&m_event);
  T->ls();

  Int_t nEntries = (Int_t) T->GetEntries();

  printf("Using Root file %s with %i entries n",
	 rootFileName,nEntries);
   
  m_nEvent = 0;
}

 LCDreadRootFile::~LCDreadRootFile() {
  if (m_ownevent) {
    m_event->Delete();
    delete m_event;
  }
}

 Int_t LCDreadRootFile::GetEvent(LCDEvent* event) {
  if (event) {
    T->SetBranchAddress("LCDEvent",&event);
  }
  return T->GetEvent(m_nEvent++);
}

 Int_t LCDreadRootFile::GetEvent(Int_t ievt, LCDEvent* event) {
  if (event) {
    T->SetBranchAddress("LCDEvent",&event);
  }
  return T->GetEvent(ievt);
}