source: trunk/MagicSoft/Mars/mfileio/MChain.cc@ 4808

/* ======================================================================== *\
!
! *
! * This file is part of MARS, the MAGIC Analysis and Reconstruction
! * Software. It is distributed to you in the hope that it can be a useful
! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
! * It is distributed WITHOUT ANY WARRANTY.
! *
! * Permission to use, copy, modify and distribute this software and its
! * documentation for any purpose is hereby granted without fee,
! * provided that the above copyright notice appear in all copies and
! * that both that copyright notice and this permission notice appear
! * in supporting documentation. It is provided "as is" without express
! * or implied warranty.
! *
!
!
!   Author(s): Thomas Bretz, 12/2000 <mailto:tbretz@astro.uni-wuerzburg.de>
!
!   Copyright: MAGIC Software Development, 2000-2004
!
!
\* ======================================================================== */

/////////////////////////////////////////////////////////////////////////////
//
// MChain
//
// Helper class for MReadTree
//
/////////////////////////////////////////////////////////////////////////////
#include "MChain.h"

ClassImp(MChain);

using namespace std;

Int_t MChain::LoadTree(Int_t entry)
{
    //
    // This is the code from TChain::LoadTree but skips the
    // notification in LoadTree. If LoadTree raises the notification
    // a flag is set and the notification is done by hand. This
    // is done to be able to catch the return value from Notify. If
    // it has not been successfull -15 is returned.
    // This is to support return values from Notify()/Reinit()
    //
    TObject *notify = GetNotify();

    SetNotify(this);

    Int_t rc = TChain::LoadTree(entry);

    if (rc >= 0 && fNotified && notify)
        if (!notify->Notify())
            rc = -15;

    SetNotify(notify);

    return rc;
}