Base class for MUON data stores. More...

#include <AliMUONVStore.h>

Inheritance diagram for AliMUONVStore:

Public Member Functions
	AliMUONVStore ()

virtual	~AliMUONVStore ()

virtual Bool_t	Add (TObject *object)=0
	Add an object to the store. More...

virtual void	Clear (Option_t *opt="")=0
	Clear ourselves (i.e. Reset) More...

virtual AliMUONVStore *	Create () const =0
	Create an empty copy of this. More...

virtual TIterator *	CreateIterator () const =0
	Return an iterator to loop over the whole store. More...

virtual Bool_t	CanConnect () const =0
	Whether the Connect(TTree&) method is implemented. More...

virtual Bool_t	Connect (TTree &tree, Bool_t alone=kTRUE) const
	Connect us to a TTree (only valid if CanConnect()==kTRUE) More...

virtual TObject *	FindObject (const char *name) const
	Find an object by name. More...

virtual TObject *	FindObject (const TObject *object) const
	Find an object. More...

virtual TObject *	FindObject (UInt_t uniqueID) const
	Find an object using a single id. More...

virtual TObject *	FindObject (Int_t i, Int_t j) const
	Find an object using 2 ids. More...

virtual Int_t	GetSize () const =0
	The number of objects stored. More...

virtual Int_t	GetSize (Int_t i) const
	The number of objects stored for firstid=i. Not implemented by default. More...

virtual Bool_t	IsEmpty () const
	Whether we are empty or not. More...

virtual void	Print (Option_t *wildcard="") const
	Print all objects whose name matches wildcard. More...

virtual void	Print (Option_t wildcard, Option_t opt) const
	Print, with option, all objects whose name matches wildcard. More...

Static Public Member Functions
static AliMUONVStore *	Create (TTree &tree, const char *what)
	Create a store from a TTree. More...

Detailed Description

Base class for MUON data stores.

A store is a container, which can be searched for (using FindObject methods), iterated upon (using CreateIterator() method), and into which you can add objects (using Add)

In addition, a store can be connected to a TTree.

The general way of dealing with I/O for MUON is a two stage process :

1) first get a TTree pointer using the AliLoader mechanism (this is AliRoot general)

2) connect that TTree to a MUON (virtual) data container using the container's Connect(TTree&) method (this is MUON specific)

Example for reading digits for nevents

AliMUONVDigitStore* digitStore(0x0);
AliLoader* loader = ... ( get loader from somewhere, e.g. AliRunLoader::GetDetectorLoader());
loader->LoadDigits("READ"); // load digits
for ( Int_t i = 0; i < nevents; ++i ) 
{
  TTree* treeD = loader->TreeD(); // get the tree
  if (!digitStore) digitStore = static_cast<AliMUONVDigitStore*>
    (AliMUONVDigitStore::CreateStore(*treeD,"Digit")); // creates a container for digits 
  (concrete class is given by the tree itself)
  digitStore->Connect(*treeD);
  treeD->GetEvent(0); // actual reading of the data
  the digitStore is now filled and ready to be used
  ....
  digitStore->Clear(); // reset once used
}

Please note that for reading data, you do not need to know the concrete container class, as it is given to you by the TTree

Example for writing digits

get the loader and do a loader->LoadDigits("RECREATE" or "UPDATE") 
(generally done by the framework itself)
AliMUONVDigitStore* digitStore = new AliMUONDigitStoreV1
// for writing, must decide on the concrete store class to use
for ( Int_t i = 0; i < nevents; ++i ) 
{
  TTree* treeD = loader->TreeD();
  digitStore->Connect(*treeD);
  
  ... put some digits in the digitStore
  treeD->Fill();
  loader->WriteDigits("OVERWRITE");
}
delete digitStore;
loader->UnloadDigits();