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2895972e | 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 | //////////////////////////////////////////////////////////////////////////////// | |
17 | // | |
18 | // This class contains all code which is used to compute any of the values | |
19 | // which can be of interest within a resonance analysis. Besides the obvious | |
20 | // invariant mass, it allows to compute other utility values on all possible | |
21 | // targets, in order to allow a wide spectrum of binning and checks. | |
22 | // When needed, this object can also define a binning in the variable which | |
23 | // it is required to compute, which is used for initializing axes of output | |
24 | // histograms (see AliRsnFunction). | |
25 | // The value computation requires this object to be passed the object whose | |
26 | // informations will be used. This object can be of any allowed input type | |
27 | // (track, Daughter, event), then this class must inherit from AliRsnTarget. | |
28 | // Then, when value computation is attempted, a check on target type is done | |
29 | // and computation is successful only if expected target matches that of the | |
30 | // passed object. | |
31 | // In some cases, the value computation can require a support external object, | |
32 | // which must then be passed to this class. It can be of any type inheriting | |
33 | // from TObject. | |
34 | // | |
35 | // authors: A. Pulvirenti (alberto.pulvirenti@ct.infn.it) | |
36 | // M. Vala (martin.vala@cern.ch) | |
37 | // | |
38 | //////////////////////////////////////////////////////////////////////////////// | |
39 | ||
40 | #include "AliVVertex.h" | |
41 | #include "AliMultiplicity.h" | |
42 | #include "AliESDtrackCuts.h" | |
43 | #include "AliESDpid.h" | |
44 | #include "AliAODPid.h" | |
45 | #include "AliCentrality.h" | |
46 | #include "AliESDUtils.h" | |
47 | ||
48 | #include "AliRsnEvent.h" | |
49 | #include "AliRsnDaughter.h" | |
50 | #include "AliRsnMother.h" | |
51 | #include "AliRsnDaughterDef.h" | |
52 | #include "AliRsnDaughterDef.h" | |
53 | ||
54 | #include "AliRsnValueDaughter.h" | |
55 | ||
56 | ClassImp(AliRsnValueDaughter) | |
57 | ||
58 | //_____________________________________________________________________________ | |
59 | AliRsnValueDaughter::AliRsnValueDaughter(const char *name, EType type) : | |
60 | AliRsnValue(name, AliRsnTarget::kDaughter), | |
61 | fType(type) | |
62 | { | |
63 | // | |
64 | // Constructor | |
65 | // | |
66 | } | |
67 | ||
68 | //_____________________________________________________________________________ | |
69 | AliRsnValueDaughter::AliRsnValueDaughter(const AliRsnValueDaughter& copy) : | |
70 | AliRsnValue(copy), | |
71 | fType(copy.fType) | |
72 | { | |
73 | // | |
74 | // Copy constructor | |
75 | // | |
76 | } | |
77 | ||
78 | //_____________________________________________________________________________ | |
79 | AliRsnValueDaughter& AliRsnValueDaughter::operator=(const AliRsnValueDaughter& copy) | |
80 | { | |
81 | // | |
82 | // Assignment operator. | |
83 | // Works like copy constructor. | |
84 | // | |
85 | ||
86 | AliRsnValue::operator=(copy); | |
87 | fType = copy.fType; | |
88 | ||
89 | return (*this); | |
90 | } | |
91 | ||
92 | //_____________________________________________________________________________ | |
93 | const char* AliRsnValueDaughter::GetTypeName() const | |
94 | { | |
95 | // | |
96 | // This method returns a string to give a name to each possible | |
97 | // computation value. | |
98 | // | |
99 | ||
100 | switch (fType) { | |
101 | case kP: return "SingleTrackPtot"; | |
102 | case kPt: return "SingleTrackPt"; | |
103 | case kPtpc: return "SingleTrackPtpc"; | |
104 | case kEta: return "SingleTrackEta"; | |
105 | case kITSsignal: return "SingleTrackITSsignal"; | |
106 | case kTPCsignal: return "SingleTrackTPCsignal"; | |
107 | case kTOFsignal: return "SingleTrackTOFsignal"; | |
108 | default: return "Undefined"; | |
109 | } | |
110 | } | |
111 | ||
112 | //_____________________________________________________________________________ | |
113 | Bool_t AliRsnValueDaughter::Eval(TObject *object) | |
114 | { | |
115 | // | |
116 | // Evaluation of the required value. | |
117 | // Checks that the passed object is of the right type | |
118 | // and if this check is successful, computes the required value. | |
119 | // The output of the function tells if computing was successful, | |
120 | // and the values must be taken with GetValue(). | |
121 | // | |
122 | ||
123 | // coherence check, which also casts object | |
124 | // to AliRsnTarget data members and returns kFALSE | |
125 | // in case the object is NULL | |
126 | if (!TargetOK(object)) return kFALSE; | |
127 | ||
128 | // set a reference to the mother momentum | |
129 | TLorentzVector &p = fDaughter->P(fUseMCInfo); | |
130 | AliVTrack *track = fDaughter->Ref2Vtrack(); | |
131 | ||
132 | // compute value depending on types in the enumeration | |
133 | // if the type does not match any available choice, or if | |
134 | // the computation is not doable due to any problem | |
135 | // (not initialized support object, wrong values, risk of floating point errors) | |
136 | // the method returng kFALSE and sets the computed value to a meaningless number | |
137 | switch (fType) { | |
138 | case kP: | |
139 | fComputedValue = p.Mag(); | |
140 | return kTRUE; | |
141 | case kPt: | |
142 | fComputedValue = p.Perp(); | |
143 | return kTRUE; | |
144 | case kEta: | |
145 | fComputedValue = p.Eta(); | |
146 | return kTRUE; | |
147 | case kPtpc: | |
148 | if (track) { | |
149 | fComputedValue = track->GetTPCmomentum(); | |
150 | return kTRUE; | |
151 | } else { | |
152 | AliWarning("Cannot get TPC momentum for non-track object"); | |
153 | fComputedValue = 0.0; | |
154 | return kFALSE; | |
155 | } | |
156 | case kITSsignal: | |
157 | if (track) { | |
158 | fComputedValue = track->GetITSsignal(); | |
159 | return kTRUE; | |
160 | } else { | |
161 | AliWarning("Cannot get ITS signal for non-track object"); | |
162 | fComputedValue = 0.0; | |
163 | return kFALSE; | |
164 | } | |
165 | case kTPCsignal: | |
166 | if (track) { | |
167 | fComputedValue = track->GetTPCsignal(); | |
168 | return kTRUE; | |
169 | } else { | |
170 | AliWarning("Cannot get TPC signal for non-track object"); | |
171 | fComputedValue = 0.0; | |
172 | return kFALSE; | |
173 | } | |
174 | case kTOFsignal: | |
175 | if (track) { | |
176 | fComputedValue = track->GetTOFsignal(); | |
177 | return kTRUE; | |
178 | } else { | |
179 | AliWarning("Cannot get TOF signal for non-track object"); | |
180 | fComputedValue = 0.0; | |
181 | return kFALSE; | |
182 | } | |
183 | default: | |
184 | AliError(Form("[%s] Invalid value type for this computation", GetName())); | |
185 | return kFALSE; | |
186 | } | |
187 | } |