| 1 | /* ======================================================================== *\
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| 2 | !
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| 3 | ! *
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| 4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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| 5 | ! * Software. It is distributed to you in the hope that it can be a useful
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| 6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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| 7 | ! * It is distributed WITHOUT ANY WARRANTY.
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| 8 | ! *
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| 9 | ! * Permission to use, copy, modify and distribute this software and its
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| 10 | ! * documentation for any purpose is hereby granted without fee,
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| 11 | ! * provided that the above copyright notice appear in all copies and
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| 12 | ! * that both that copyright notice and this permission notice appear
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| 13 | ! * in supporting documentation. It is provided "as is" without express
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| 14 | ! * or implied warranty.
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| 15 | ! *
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| 16 | !
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| 17 | !
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| 18 | ! Author(s): Thomas Bretz, 12/2000 <mailto:tbretz@astro.uni-wuerzburg.de>
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| 19 | !
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| 20 | ! Copyright: MAGIC Software Development, 2000-2004
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| 21 | !
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| 22 | !
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| 23 | \* ======================================================================== */
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| 24 |
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| 25 | /////////////////////////////////////////////////////////////////////////////
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| 26 | //
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| 27 | // MChain
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| 28 | //
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| 29 | // Helper class for MReadTree
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| 30 | //
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| 31 | /////////////////////////////////////////////////////////////////////////////
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| 32 | #include "MChain.h"
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| 33 |
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| 34 | ClassImp(MChain);
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| 35 |
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| 36 | using namespace std;
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| 37 |
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| 38 | // --------------------------------------------------------------------------
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| 39 | //
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| 40 | // This is the code from TChain::LoadTree but skips the
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| 41 | // notification in LoadTree. If LoadTree raises the notification
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| 42 | // a flag is set and the notification is done by hand. This
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| 43 | // is done to be able to catch the return value from Notify. If
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| 44 | // it has not been successfull -15 is returned.
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| 45 | // This is to support return values from Notify()/Reinit().
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| 46 | // The status can be checked afterward by HasError/HasFatalError/GetError
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| 47 | //
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| 48 | Long64_t MChain::LoadTree(Long64_t entry)
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| 49 | {
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| 50 | TObject *notify = GetNotify();
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| 51 |
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| 52 | SetNotify(this);
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| 53 |
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| 54 | Long64_t rc = TChain::LoadTree(entry);
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| 55 |
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| 56 | // <0: LoadTree failed
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| 57 | // =0: LoadTree was ok
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| 58 | // >0: Notify failed
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| 59 | fLastError = rc;
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| 60 |
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| 61 | if (rc>=0 && fNotified && notify)
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| 62 | {
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| 63 | fLastError = notify->Notify() ? 0 : kFatalError;
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| 64 | if (fLastError==kFatalError)
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| 65 | rc = -15;
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| 66 | }
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| 67 |
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| 68 | SetNotify(notify);
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| 69 |
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| 70 | return rc;
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| 71 | }
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