4 #ifndef ALIHLTOFFLINEINTERFACE_H
5 #define ALIHLTOFFLINEINTERFACE_H
6 /* This file is property of and copyright by the ALICE HLT Project *
7 * ALICE Experiment at CERN, All rights reserved. *
8 * See cxx source for full Copyright notice */
10 /** @file AliHLTOfflineInterface.h
11 @author Matthias Richter
13 @brief the HLT interface to AliRoot
16 // see below for class documentation
18 // refer to README to build package
20 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
30 /******************************************************************************/
33 * @class AliHLTOfflineInterface
34 * The class implements the basic interface to the AliRoot objects during
36 * It serves as a base class for offline source and sink interface components
37 * and provides access methods for the AliRunLoader, AliRawReader and AliESDEvent
38 * objects. The AliRunLoader and the AliRawReader are fixed during one run,
39 * while the AliESDEvent object will be changed from event to event.<br>
40 * \em Note: The digits and clusters trees are not available through this
41 * interface class as they are completetly detector (AliLoader) dependend.
43 * @note This class is only used for the @ref alihlt_system.
45 * @ingroup alihlt_system
47 class AliHLTOfflineInterface : public TObject {
49 /** standard constructor */
50 AliHLTOfflineInterface();
52 * @param pRunLoader pointer to AliRoot run loader
53 * @param pRawReader pointer to AliRoot raw reader
55 AliHLTOfflineInterface(AliRunLoader* pRunLoader, AliRawReader* pRawReader);
56 /** not a valid copy constructor, defined according to effective C++ style */
57 AliHLTOfflineInterface(const AliHLTOfflineInterface&);
58 /** not a valid assignment op, but defined according to effective C++ style */
59 AliHLTOfflineInterface& operator=(const AliHLTOfflineInterface&);
61 virtual ~AliHLTOfflineInterface();
64 * Get the AliRoot run loader.
66 AliRunLoader* GetRunLoader() const;
69 * Get the AliRoot raw reader
71 AliRawReader* GetRawReader() const;
74 * Set AliRoot ESD for the current event.
76 int SetESD(Int_t eventNo, AliESDEvent* pESD);
81 AliESDEvent* GetESD() const;
84 * Set AliRoot external params.
86 * @param runLoader the AliRoot runloader
87 * @param rawReader the AliRoot RawReader
88 * @return neg. error code if failed
90 int SetParams(AliRunLoader* runLoader, AliRawReader* rawReader);
93 * Reset AliRoot internal params.
98 * Set AliRoot external params.
99 * This method works on the global list.
100 * @param runLoader the AliRoot runloader
101 * @param rawReader the AliRoot RawReader
102 * @return neg. error code if failed
104 static int SetParamsToComponents(AliRunLoader* runLoader, AliRawReader* rawReader);
107 * Fill ESD for one event.
108 * Fill the ESD with the previously reconstructed data. It must be implmented
109 * by the child class.
110 * @param eventNo event No. \em Note: this is an internal enumeration of the
112 * @param runLoader the AliRoot runloader
113 * @param esd an AliESDEvent instance
114 * @return neg. error code if failed
116 virtual int FillESD(int eventNo, AliRunLoader* runLoader, AliESDEvent* esd)=0;
119 * Fill ESD for one event.
120 * The FillESD method of all active AliHLTOfflineDataSink's is called in
121 * order to fill the ESD with the previously reconstructed data. This method
122 * works on the global list.
123 * @param eventNo event No. \em Note: this is an internal enumeration of the
125 * @param runLoader the AliRoot runloader
126 * @param esd an AliESDEvent instance
127 * @return neg. error code if failed
129 static int FillComponentESDs(int eventNo, AliRunLoader* runLoader, AliESDEvent* esd);
132 * Reset AliRoot internal params of all active components.
133 * This method works on the global list.
135 static int ResetComponents();
139 * Register an OfflineInterface.
140 * @param me instance of AliHLTOfflineInterface
141 * @return neg. error code if failed
143 static int Register(AliHLTOfflineInterface* me);
146 * Unregister an OfflineInterface.
147 * @param me instance of AliHLTOfflineInterface
148 * @return neg. error code if failed
150 static int Unregister(AliHLTOfflineInterface* me);
153 /** global AliRoot run loader instance (for all components) */
154 static AliRunLoader* fgpRunLoader; //! transient
155 /** global AliRoot raw reader instance (for all components) */
156 static AliRawReader* fgpRawReader; //! transient
158 /** private AliRoot run loader instance */
159 AliRunLoader* fpRunLoader; //! transient
160 /** private AliRoot raw reader instance */
161 AliRawReader* fpRawReader; //! transient
162 /** AliRoot HLT ESD instance */
163 AliESDEvent* fpESD; //! transient
165 /** the list of active interfaces */
166 static AliHLTOfflineInterface* fAnchor; //! transient
168 /** next element in the list */
169 AliHLTOfflineInterface* fpNext; //! transient
171 /** the current element */
172 static AliHLTOfflineInterface* fCurrent; //! transient
174 /** number of interfaces */
175 static int fCount; //! see above
177 ClassDef(AliHLTOfflineInterface, 3);