FMD/AliFMDMultAlgorithm.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //____________________________________________________________________
  19 //
  20 // Base class for FMD reconstruction algorithms.
  21 //
  22 // Derived classes will implement various ways of reconstructing the
  23 // charge particle multiplicity in the FMD.
  24 //
  25 //      +---------------------+       +---------------------+
  26 //      | AliFMDReconstructor |<>-----| AliFMDMultAlgorithm |
  27 //      +---------------------+       +---------------------+
  28 //                                               ^
  29 //                                               |
  30 //                                   +-----------+---------+
  31 //                                   |                     |
  32 //                         +-------------------+   +------------------+
  33 //                         | AliFMDMultPoisson |   | AliFMDMultNaiive |
  34 //                         +-------------------+   +------------------+
  35 //
  36 // AliFMDReconstructor acts as a manager class.  It contains a list of
  37 // AliFMDMultAlgorithm objects.  The call graph looks something like
  38 //
  39 //
  40 //       +----------------------+            +----------------------+
  41 //       | :AliFMDReconstructor |            | :AliFMDMultAlgorithm |
  42 //       +----------------------+            +----------------------+
  43 //                  |                                  |
  44 //    Reconstruct  +-+                                 |
  45 //    ------------>| |                         PreRun +-+
  46 //                 | |------------------------------->| |
  47 //                 | |                                +-+
  48 //                 | |-----+ (for each event)          |
  49 //                 | |     | *ProcessEvent             |
  50 //                 |+-+    |                           |
  51 //                 || |<---+                 PreEvent +-+
  52 //                 || |------------------------------>| |
  53 //                 || |                               +-+
  54 //                 || |-----+                          |
  55 //                 || |     | ProcessDigits            |
  56 //                 ||+-+    |                          |
  57 //                 ||| |<---+                          |
  58 //                 ||| |         *ProcessDigit(digit) +-+
  59 //                 ||| |----------------------------->| |
  60 //                 ||| |                              +-+
  61 //                 ||+-+                               |
  62 //                 || |                     PostEvent +-+
  63 //                 || |------------------------------>| |
  64 //                 || |                               +-+
  65 //                 |+-+                                |
  66 //                 | |                        PostRun +-+
  67 //                 | |------------------------------->| |
  68 //                 | |                                +-+
  69 //                 +-+                                 |
  70 //                  |                                  |
  71 //
  72 //
  73 #include "AliFMDMultAlgorithm.h"        // ALIFMDMULTALGORITHM_H
  74 #include "AliFMDDigit.h"                // ALIFMDDIGIT_H
  75 #include <TClonesArray.h>               // ROOT_TClonesArray
  76
  77 //____________________________________________________________________
  78 ClassImp(AliFMDMultAlgorithm)
  79 #if 0
  80   ; // This is here to keep Emacs for indenting the next line
  81 #endif
  82
  83 //____________________________________________________________________
  84 AliFMDMultAlgorithm::AliFMDMultAlgorithm(const char* name, const char* title)
  85   : TNamed(name, title),
  86     fTreeR(0),
  87     fMult(0),
  88     fFMD(0)
  89 {}
  90
  91 //____________________________________________________________________
  92 AliFMDMultAlgorithm::~AliFMDMultAlgorithm()
  93 {
  94   if (fMult) delete fMult;
  95 }
  96
  97
  98 //____________________________________________________________________
  99 void
 100 AliFMDMultAlgorithm::PreEvent(TTree* treeR, Float_t /* ipZ */)
 101 {
 102   if (fMult) fMult->Clear();
 103   fNMult = 0;
 104   fTreeR = treeR;
 105 }
 106
 107
 108
 109 //____________________________________________________________________
 110 //
 111 // EOF
 112 //