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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 /// \class AliMUON2DMapIteratorByI
19 ///
20 /// Implementation of TIterator for 2D maps
21 /// 
22 /// An implementation of TIterator for 2D maps, which can iterate
23 /// on a range of i values (i being the first element of the couple
24 /// (i,j) used to index values in the map).
25 ///
26 /// \author Laurent Aphecetche
27
28 #include "AliMUON2DMapIteratorByI.h"
29
30 #include "AliMpExMap.h"
31
32 /// \cond CLASSIMP
33 ClassImp(AliMUON2DMapIteratorByI)
34 /// \endcond
35
36 //_____________________________________________________________________________
37 AliMUON2DMapIteratorByI::AliMUON2DMapIteratorByI(const AliMpExMap& theMap,
38                                                  Int_t firstI,
39                                                  Int_t lastI)
40 : TIterator(),
41 fMap(&theMap),
42 fIter2(0x0),
43 fCurrentI(-1),
44 fCurrentJ(-1),
45 fFirstI(firstI),
46 fLastI(lastI)
47 {
48   /// default ctor
49   Reset();
50 }
51
52 //_____________________________________________________________________________
53 AliMUON2DMapIteratorByI::AliMUON2DMapIteratorByI(const AliMUON2DMapIteratorByI& rhs)
54 :TIterator(rhs),
55 fMap(rhs.fMap),
56 fIter2(0x0),
57 fCurrentI(rhs.fCurrentI),
58 fCurrentJ(rhs.fCurrentJ),
59 fFirstI(rhs.fFirstI),
60 fLastI(rhs.fLastI)
61 {
62   /// copy ctor
63   if ( rhs.fIter2 ) fIter2 = new TExMapIter(*(rhs.fIter2));
64 }
65
66 //_____________________________________________________________________________
67 AliMUON2DMapIteratorByI&
68 AliMUON2DMapIteratorByI::operator=(const AliMUON2DMapIteratorByI& rhs)
69 {
70   /// assignment operator
71   if ( this != &rhs ) 
72   {
73     fMap = rhs.fMap;
74     fIter2 = 0x0;
75     if ( rhs.fIter2 ) fIter2 = new TExMapIter(*(rhs.fIter2));
76     fCurrentI = rhs.fCurrentI;
77     fCurrentJ = rhs.fCurrentJ;
78     fFirstI = rhs.fFirstI;
79     fLastI = rhs.fLastI;
80   }
81   return *this;
82 }
83
84 //_____________________________________________________________________________
85 TIterator&
86 AliMUON2DMapIteratorByI::operator=(const TIterator& rhs)
87 {
88   /// overriden assigment operator (imposed by Root's declaration of TIterator ?)
89   if ( this != &rhs ) 
90   {
91     const AliMUON2DMapIteratorByI& rhs1 = static_cast<const AliMUON2DMapIteratorByI&>(rhs);
92     fMap = rhs1.fMap;
93     fIter2 = 0x0;
94     if ( rhs1.fIter2 ) fIter2 = new TExMapIter(*(rhs1.fIter2));
95     fCurrentI = rhs1.fCurrentI;
96     fCurrentJ = rhs1.fCurrentJ;
97     fFirstI = rhs1.fFirstI;
98     fLastI = rhs1.fLastI;
99   }
100   return *this;
101 }
102
103 //_____________________________________________________________________________
104 AliMUON2DMapIteratorByI::~AliMUON2DMapIteratorByI()
105 {
106   /// dtor
107   delete fIter2;
108 }
109
110 //_____________________________________________________________________________
111 const TCollection* 
112 AliMUON2DMapIteratorByI::GetCollection() const
113 {
114   /// Not implemented
115   return 0x0;
116 }
117
118 //_____________________________________________________________________________
119 TObject*
120 AliMUON2DMapIteratorByI::GetValue(TExMapIter& iter, Int_t& theKey) const
121 {
122   /// return the value corresponding to theKey in iterator iter
123   theKey = -1;
124   Long_t key, value;
125   Bool_t ok = iter.Next(key,value);
126   if (!ok) return 0x0;
127   theKey = (Int_t)(key & 0xFFFF);
128   return reinterpret_cast<TObject*>(value);
129 }
130
131 //_____________________________________________________________________________
132 TObject*
133 AliMUON2DMapIteratorByI::Next()
134 {
135   /// logic :
136   /// get TObject* from fIter2
137   /// if null, increment fIter2 by getting next map from fMap
138   
139   if (!fIter2) return 0x0;
140   
141   TObject* o = GetValue(*fIter2,fCurrentJ);
142   if (!o)
143   {
144     // fIter2 exhausted, try to get the next one
145     delete fIter2;
146     fIter2 = 0x0;
147     AliMpExMap* m(0x0);
148     while ( !m && fCurrentI < fLastI ) 
149     {
150       ++fCurrentI;
151       m = static_cast<AliMpExMap*>(fMap->GetValue(fCurrentI));
152     }
153     if (!m) return 0x0; // we are done
154     fIter2 = new TExMapIter(m->GetIterator());
155     o = GetValue(*fIter2,fCurrentJ);
156   }
157   
158   return o;
159 }
160
161 //_____________________________________________________________________________
162 void
163 AliMUON2DMapIteratorByI::Reset()
164 {
165   /// rewind the iterator
166   delete fIter2;
167   fIter2 = 0x0;
168   fCurrentI = fFirstI;
169   AliMpExMap* m;
170   
171   while ( !(  m = static_cast<AliMpExMap*>(fMap->GetValue(fCurrentI) ) ) && 
172           fCurrentI < fLastI )
173   {
174     ++fCurrentI;
175   }
176   
177   if ( m ) 
178   {
179     fIter2 = new TExMapIter(m->GetIterator());
180   }
181 }