TDSet

class TDSet : public TNamed

    public:

                      TDSet TDSet()
                      TDSet TDSet(const char* type, const char* objname = "*", const char* dir = "/")
                      TDSet TDSet(const TDSet&)
               virtual void ~TDSet()
               virtual void Add(const char* file, const char* objname = "0", const char* dir = "0", Long64_t first = 0, Long64_t num = -1)
               virtual void Add(TDSet* set)
               virtual void AddFriend(TDSet* friendset)
             static TClass* Class()
              TDSetElement* Current() const
               virtual void Draw(const Option_t*)
              virtual Int_t Draw(const char* varexp, const char* selection, Option_t* option, Long64_t nentries = -1, Long64_t firstentry = 0)
              virtual Int_t Draw(const char* varexp, const TCut& selection, Option_t* option, Long64_t nentries = -1, Long64_t firstentry = 0)
                const char* GetDirectory() const
               static Int_t GetEntries(Bool_t isTree, const char* filename, const char* path, const char* objname, Long64_t& entries)
             virtual TList* GetListOfElements() const
                const char* GetObjName() const
                const char* GetType() const
            virtual TClass* IsA() const
             virtual Bool_t IsTree() const
             virtual Bool_t IsValid() const
      virtual TDSetElement* Next()
               virtual void Print(Option_t* option) const
              virtual Int_t Process(const char* selector, Option_t* option, Long64_t nentries = -1, Long64_t firstentry = 0, TEventList* evl = 0)
               virtual void Reset()
                       void SetDirectory(const char* dir)
                       void SetObjName(const char* objname)
               virtual void ShowMembers(TMemberInspector& insp, char* parent)
               virtual void Streamer(TBuffer& b)
                       void StreamerNVirtual(TBuffer& b)

Data Members

    private:

      TString fObjName   name of objects to be analyzed (e.g. TTree name)
       TList* fElements  -> list of TDSetElements
       Bool_t fIsTree    true if type is a TTree (or TTree derived)
       TIter* fIterator  ! iterator on fElements

    protected:

      TDSetElement* fCurrent  ! current element

See also

TDSetProxy

Class Description

                                                                      
 TDSet                                                                
                                                                      
 This class implements a data set to be used for PROOF processing.    
 The TDSet defines the class of which objects will be processed,      
 the directory in the file where the objects of that type can be      
 found and the list of files to be processed. The files can be        
 specified as logical file names (LFN's) or as physical file names    
 (PFN's). In case of LFN's the resolution to PFN's will be done       
 according to the currently active GRID interface.                    
 Examples:                                                            
   TDSet treeset("TTree", "AOD");                                     
   treeset.Add("lfn:/alien.cern.ch/alice/prod2002/file1");            
   ...                                                                
   treeset.AddFriend(friendset);                                      
                                                                      
 or                                                                   
                                                                      
   TDSet objset("MyEvent", "*", "/events");                           
   objset.Add("root://cms.cern.ch/user/prod2002/hprod_1.root");       
   ...                                                                
   objset.Add(set2003);                                               
                                                                      
 Validity of file names will only be checked at processing time       
 (typically on the PROOF master server), not at creation time.        
                                                                      

 Default ctor.

 Create a TDSet object. The "type" defines the class of which objects
 will be processed. The optional "objname" argument specifies the
 name of the objects of the specified class (the name is mandatory
 if the type inherits from a TTree). If the "objname" is not given all
 objects of the class found in the specified directory are processed.
 The "dir" argument specifies in which directory the objects are
 to be found, the top level directory ("/") is the default.
 Directories can be specified using wildcards, e.g. "*" or "/*"
 means to look in all top level directories, "/dir/*" in all
 directories under "/dir", and "/*/*" to look in all directories
 two levels deep.

 Cleanup.

 Process TDSet on currently active PROOF session.
 Returns -1 in case of error, 0 otherwise.

 Print TDSet basic or full data. When option="a" print full data.

 Set/change object name.

 Set/change directory.

 Add file to list of files to be analyzed. Optionally with the
 objname and dir arguments the default, TDSet wide, objname and
 dir can be overridden.

 Add specified data set to the this set.

 Add friend dataset to this set. Only possible if the TDSet type is
 a TTree or derived class.

 Reset or initialize access to the elements.

 Returns next TDSetElement.

 Returns number of entries in tree or objects in file. Returns -1 in
 case of error, 0 otherwise.

 Draw expression varexp for specified entries.
 This function accepts a TCut objects as argument.
 Use the operator+ to concatenate cuts.
 Example:
   dset.Draw("x",cut1+cut2+cut3);

 Draw expression varexp for specified entries.
 See TTree::Draw().

Inline Functions

                Int_t Draw(const char* varexp, const TCut& selection, Option_t* option, Long64_t nentries = -1, Long64_t firstentry = 0)
          const char* GetType() const
          const char* GetObjName() const
          const char* GetDirectory() const
               Bool_t IsTree() const
               Bool_t IsValid() const
               TList* GetListOfElements() const
        TDSetElement* Current() const
              TClass* Class()
              TClass* IsA() const
                 void ShowMembers(TMemberInspector& insp, char* parent)
                 void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)
                TDSet TDSet(const TDSet&)