Go4EventServer
Class TGo4FileSource

class TGo4FileSource

derived from TGo4EventSource

Raw event source which reads entries from a root TTree in a TFile.
File is opened by ctor; method BuildEvent() iterates over tree. Needs pointer to external
reference to event structure class which must match the structure of the tree entry
New since 10/2004: Name of event element defines tree subbranch
to be activated as partial input

Author:

J. Adamczewski

Since: 1/2001

Fields inherited from class TNamed

fName, fTitle

Constructor Summary

TGo4FileSource()

TGo4FileSource(TGo4FileSourceParameter* par)

TGo4FileSource(const char * name)

Destructor Summary
virtual synchronized	~TGo4FileSource()

Method Summary
Bool_t	BuildCompositeEvent(TGo4CompositeEvent* dest)           Use this method instead of BuildEvent to correctly sync and read Go4 composite event
Bool_t	BuildEvent(TGo4EventElement* dest)           Fill the destination event dest from the tree.
private Int_t	Open()           Open file.

Methods inherited from interface Go4Event.TGo4EventSource

Clear, GetCreateStatus, GetErrMess, GetEventStatus, SetCreateStatus, SetErrMess, SetEventStatus, ThrowError

Methods inherited from class TNamed

operator=, Clone, Compare, Copy, FillBuffer, GetName, GetTitle, Hash, IsSortable, SetName, SetNameTitle, SetTitle, ls, Print, Sizeof, Class, Class_Name, Class_Version, Dictionary, IsA, ShowMembers, Streamer, StreamerNVirtual, DeclFileName, ImplFileLine, ImplFileName, DeclFileLine

Field Detail

fbActivated

private Bool_t fbActivated

This flag is used for lazy init of tree in Eventbuilding methods.

private Int_t fiCurrentEvent

Number of events stored in the Tree. Used to check if
the complete tree is already read.

private Int_t fiMaxEvents

Number of events stored in the Tree. Used to check if
the complete tree is already read.

private TString fxBranchName

name of tree branch to be activated

private TFile* fxFile

private TObject* fxTopEvent

pointer to top branch event

private TTree* fxTree

public TGo4FileSource()

public TGo4FileSource(TGo4FileSourceParameter* par)

public TGo4FileSource(const char * name)

public virtual synchronized ~TGo4FileSource()

public Bool_t BuildCompositeEvent(TGo4CompositeEvent* dest)

Use this method instead of BuildEvent
to correctly sync and read Go4 composite event

public Bool_t BuildEvent(TGo4EventElement* dest)

Fill the destination event dest from the tree.
If end of tree is reached, the current event counter
is reset and a kFALSE value is returned.

private Int_t Open()

Open file. To be used by all constructors.