class Hades: public TObject

Default constructor for Hades. It sets the global pointer gHades.
This constructor also creates one HDebug object if none exists.

Closes the reconstruction program. If there are unsaved data, it saves them
When using Hades within a macro don't forget to call the destructor,
or data won't be saved.

This method is used to build the reconstructor's graph. For that purpose
the macro in the file "fileName" is executed.

Returns 0 if successfull.

This method is intended to build the event's structure. For that purpose
the macro in the file "fileName" is executed.

Returns 0 if succesfull.

 This method is used to interpret a "configuration macro". Within this
 macro all the information to run the analisys is given. This is an
 alternative way of initialization without using setEventLayout(),
 setAlgorithmLayout()...

 For more information on initialization see the initialization section in
 the HYDRA manual.

 Within this macro the user is responsible of calling the Hades::init()
 function before the call to Hades::makeTree();

 This function initializes Hades. This includes initialization of the
 reconstructors, the data source and the detectors.

 The event with the sequence number == 0 is a very special event
 which needs special treatment (does not contain any data, it is
 header only, should be skipped from the analysis!!!). It is only
 in the real data and has ID == 2 and Version == 0 (between jan04
 and may06) which points to a calibration event...

Returns a pointer to the event in reconstruction

 This function sets the event layout to that given by "ev". The user first
 builds the event layout by creating an HEvent object and then call this
 function; which sets the data member fCurrentEvent.

 This function is typically called from the macro invoked in
 setEventLayout()

 Method used to establish the data source where data are taken from. For
 that purpose an object of a class derived from HDataSource is created and
 the setDataSource() method is called to pass a pointer to this object

  This function should be called typically from the macro invoked with
  setConfig()

 Set second data source (needed e.g. for event merging).
 Must be a Root source!

 Creates an HLD file output

Method used to control the shape of the output Root tree for the events..
Three split levels are supported:

  splitLevel=0 ---> An only branch is created for the event, which is
                    stored as a whole (i.e. the whole HEvent is stored as
                    one piece).

  splitLevel=1 ---> The partial events are stored as a whole, meanwhile the
                    top of the event class (tracks, header ...) is stored
			creating one TBranch per data member

  splitLevel=2 ---> One branch per data member is created (with little
			exceptions, see Root automatic split rules). However
			the categories (see HCategory) still can decide how the
			split is done (by creating their own branches). This
                    is the default value set by the Hades constructor

Returns the current splitLevel (see setSplitLevel() )

Sets the output file, giving its name, compresion level...
For more information on the parameters see the constructor of TFile

  This method allocates the file indicated taking care of saving the
current file if any. If the file does not exist or the user wants it to be
overwritten, then opt="RECREATE"; if the file already exists and is to be
updated then opt="UPDATE"...

Returns a pointer to the current output Root tree of events

 Sets the right branch address and branch status (=1) for all the branches
 in tree which correspond to the branches which would eventually be
 generated for the output Root tree of events if the function makeTree() is
 called.

 This mechanism allows to only read those branches in "tree" which are
 neccesary to fill an event as defined in setEventLayout()

 Creates an output tree from the information in the event structure
 and according to the splitLevel (see setSplitLevel() )

  Executes the event loop;

  For each new event:
  First, the current event is cleared.
  Second, a new event is read from the data source (see HDataSource)
  Third, the reconstruction of this event is launched (see HReconstructor)
  Fourth, if a tree was created (see makeTree() ) then it is filled.

  This function returns the number of events processed. A negative value
  corresponds to an error

  timeQuota - time limit for tasks in minutes.
  timeQuota <= 0. - no limit
  Event loop end condition: evN==nEvents or runing tasks time > timeQuota

 Returns true. This tells the Root browser to show Hades as a folder
 holding other objects

 Used to browse the reconstructor's tree, a particular event or the
 reconstructor's histograms...

 This function is called by Root when browsing gHades with the Root browser

 Mapping of event ids into HTaskSet numbers for DAQ type old (version=0),
 i.e prior to Sep03, and new (version=1). Since June 2010 version = 2

 This table will go in due time into an rtdb container.  (R.H.)

 switches + counters etc

 setup rtdb + detector

 setup event

 setup tasks

 output file handling

 setup hld file output