lccd::DBFileHandler Class Reference

Implementation of ConditionsHandlerBase that reads the conditions data from a special LCIO file. More...

#include <DBFileHandler.hh>

Inheritance diagram for lccd::DBFileHandler:

List of all members.

Public Member Functions
	DBFileHandler (const std::string &fileName, const std::string &name, const std::string &inputCollection="")
	Default constructor.
virtual void	update (LCCDTimeStamp timestamp)
	Reads the event with the conditions data valid for the given time stamp, if: .
Protected Member Functions
void	init ()
	Initializes the validity intervall map from the run header.
int	findEventNumber (LCCDTimeStamp timeStamp)
	The conditions event number for the given time stamp.
Protected Attributes
std::string	_fileName
	Name of LCIO input file with conditions data.
std::string	_inputCollection
	Name of LCCollection in first event.
ValidityVector	_valVec
	Vector that holds the validity time intervalls for all events.
LCReader *	_lcReader
	The LCIO input file reader.

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Detailed Description

Implementation of ConditionsHandlerBase that reads the conditions data from a special LCIO file.

The file has to be extracted from a data base beforehand. e.g. with lccd::DBInterface::createDBFile() or created otherwise by fullfilling the following requirements:

• the run header has a pair of string vector parameters DBSince and DBTill with time stamps for every event in the file
• the collections in the events have to have a common name
• consecutive events hold condition collections for consecutive validity time intervalls
  This can be used for example to run a calibration job with a well defined tag of calibration constants from a database without actually having access to the database, e.g. in a grid environment.

  Author:

  F.Gaede, DESY

  Version:

  Id

  DBFileHandler.hh,v 1.2 2005/02/16 11:01:32 gaede Exp

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Constructor & Destructor Documentation

lccd::DBFileHandler::DBFileHandler (  const std::string &  fileName, const std::string &  name, const std::string &  inputCollection = "" )

Default constructor. You have to specify the following parameters: Parameters: fileName:  the LCIO file that holds the conditions data. name:  of this conditions data set - used, e.g. as collection name in update(LCEvent* evt) inputCollection:  name of collection in input file - if not given the name of this conditions data set is used

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Member Function Documentation

virtual void lccd::DBFileHandler::update (  LCCDTimeStamp  timestamp  )  [virtual]

Reads the event with the conditions data valid for the given time stamp, if: . the time stamp lies outside the validity range of the current collection and there is an event in the file that has a corresponding validity range as defined by the string vector parameters DBSince and DBTill in the run header Implements lccd::ConditionsHandlerBase.

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The documentation for this class was generated from the following file:

• DBFileHandler.hh

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