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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 | // Author: Andrei Gheata, 31/05/2006 | |
18 | ||
19 | //============================================================================== | |
20 | // AliAnalysysDataSlot - Class representing a data slot of an analysis task. | |
21 | // An analysis slot enforces a certain data type required by the Exec() | |
22 | // method of the analysis task. The slot must be connected to a data | |
23 | // container with data of the same type. | |
24 | // | |
25 | // The class should not be directly created by users - it is created by | |
26 | // each AliAnalysisTask when defining its input/output slots using: | |
27 | // | |
28 | // AliAnalysisTask::SetInput(Int_t index, TClass *type); | |
29 | // AliAnalysisTask::SetOutput(TClass *type); | |
30 | // | |
31 | // An existing data contaner (AliAnalysisDataContainer) can be connected to the | |
32 | // input/output slots of an analysis task using: | |
33 | // | |
34 | // AliAnalysisModule::ConnectInput(AliAnalysisTask *task, Int_t islot, | |
35 | // AliAnalysisDataContainer *cont) | |
36 | // AliAnalysisModule::ConnectOutput(AliAnalysisTask *task, | |
37 | // AliAnalysisDataContainer *cont) | |
38 | // To connect a slot to a data container, the data types declared by both must | |
39 | // match. | |
40 | //============================================================================== | |
41 | ||
42 | #include "TClass.h" | |
43 | #include "AliLog.h" | |
44 | ||
45 | #include "AliAnalysisDataSlot.h" | |
46 | #include "AliAnalysisTask.h" | |
47 | #include "AliAnalysisDataContainer.h" | |
48 | ||
49 | ClassImp(AliAnalysisDataSlot) | |
50 | ||
51 | //______________________________________________________________________________ | |
52 | Bool_t AliAnalysisDataSlot::ConnectContainer(AliAnalysisDataContainer *cont) | |
53 | { | |
54 | // Connect the data slot with a given container. The operation will succeed only | |
55 | // if the type defined by the slot inherits from the type enforced by the container. | |
56 | // The error message in case of failure is posted by the caller. | |
57 | if (!cont || !fType) return kFALSE; | |
58 | if (!fType->InheritsFrom(cont->GetType())) { | |
59 | AliError(Form("Data slot of type %s of task %s cannot be connected to data container %s of type %s", | |
60 | fType->GetName(), fParent->GetName(), cont->GetName(), cont->GetType()->GetName())); | |
61 | return kFALSE; | |
62 | } | |
63 | fContainer = cont; | |
64 | return kTRUE; | |
65 | } | |
66 | ||
67 | //______________________________________________________________________________ | |
68 | TObject *AliAnalysisDataSlot::GetData() const | |
69 | { | |
70 | // Retreives the data from the container if it is ready. | |
71 | if (!fContainer) { | |
72 | AliError(Form("Data slot of type %s of task %s has no connected data container", | |
73 | fType->GetName(), fParent->GetName())); | |
74 | return NULL; | |
75 | } | |
76 | if (!fContainer->IsDataReady()) return NULL; | |
77 | return fContainer->GetData(); | |
78 | } | |
79 | ||
80 | //______________________________________________________________________________ | |
81 | Bool_t AliAnalysisDataSlot::IsDataReady() const | |
82 | { | |
83 | // Check if data for this slot is ready in its container. | |
84 | if (!fContainer) { | |
85 | AliError(Form("Data slot of type %s of task %s has no connected data container", | |
86 | fType->GetName(), fParent->GetName())); | |
87 | return kFALSE; | |
88 | } | |
89 | return fContainer->IsDataReady(); | |
90 | } | |
91 |