PMD module
[u/mrichter/AliRoot.git] / MUON / MUONcore / AliMUON2DMapIterator.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 #include "AliMUON2DMapIterator.h"
19
20 //-----------------------------------------------------------------------------
21 /// \class AliMUON2DMapIterator
22 /// Implementation of TIterator for 2Dmaps
23 /// 
24 /// A simple implementation of VDataIterator for 2Dmaps.
25 ///
26 /// \author Laurent Aphecetche
27 //-----------------------------------------------------------------------------
28
29 #include "AliMpExMap.h"
30 #include "AliMpExMapIterator.h"
31 #include "AliLog.h"
32
33 /// \cond CLASSIMP
34 ClassImp(AliMUON2DMapIterator)
35 /// \endcond
36
37 //_____________________________________________________________________________
38 AliMUON2DMapIterator::AliMUON2DMapIterator(const AliMpExMap& theMap)
39 : TIterator(),
40 fkMap(&theMap),
41 fIter1(theMap.CreateIterator()),
42 fIter2(NextIterator())
43 {
44   /// default ctor
45   Reset();
46 }
47
48 //_____________________________________________________________________________
49 AliMUON2DMapIterator& 
50 AliMUON2DMapIterator::operator=(const TIterator& /*rhs*/)
51 {
52   // overriden operator= (imposed by Root's definition of TIterator::operator= ?)
53   
54   AliFatalGeneral("operator=(TIterator&)",""); // as in copy ctor
55   return *this;
56 }
57
58 //_____________________________________________________________________________
59 AliMUON2DMapIterator::~AliMUON2DMapIterator()
60 {
61   /// dtor
62   delete fIter1;
63   delete fIter2;
64 }
65
66 //_____________________________________________________________________________
67 const TCollection* 
68 AliMUON2DMapIterator::GetCollection() const
69 {
70   /// Return 0 as we're not really dealing with a Root TCollection...
71   return 0x0;
72 }
73
74 //_____________________________________________________________________________
75 TIterator*
76 AliMUON2DMapIterator::NextIterator()
77 {
78   /// Get next map (from fIter1) and create an iterator to it
79   
80   AliMpExMap* m = static_cast<AliMpExMap*>(fIter1->Next());
81
82   if (!m) return 0x0;
83   
84   return m->CreateIterator();
85 }
86
87 //_____________________________________________________________________________
88 TObject*
89 AliMUON2DMapIterator::Next()
90 {
91   /// return next object
92   
93   if (!fIter2) return 0x0;
94
95   TObject* o = fIter2->Next();
96   
97   if (!o)
98   {
99     delete fIter2;
100     fIter2 = NextIterator();
101     return Next();
102   }
103   
104   return o;
105 }
106
107 //_____________________________________________________________________________
108 void
109 AliMUON2DMapIterator::Reset()
110 {
111   /// rewind the iterator
112   
113   delete fIter2;
114   fIter1->Reset();
115   fIter2 = NextIterator();
116 }
117