TRefArray

class TRefArray : public TSeqCollection

    protected:

      Bool_t BoundsOk(const char* where, Int_t at) const
       Int_t GetAbsLast() const
        void Init(Int_t s, Int_t lowerBound)
      Bool_t OutOfBoundsError(const char* where, Int_t i) const

    public:

                         TRefArray()
                         TRefArray(Int_t s, Int_t lowerBound = 0)
                         TRefArray(const TRefArray& a)
                 virtual ~TRefArray()
            virtual void Add(TObject* obj)
            virtual void AddAfter(const TObject* after, TObject* obj)
            virtual void AddAt(TObject* obj, Int_t idx)
            virtual void AddAtAndExpand(TObject* obj, Int_t idx)
           virtual Int_t AddAtFree(TObject* obj)
            virtual void AddBefore(const TObject* before, TObject* obj)
            virtual void AddFirst(TObject* obj)
            virtual void AddLast(TObject* obj)
        virtual TObject* After(const TObject* obj) const
        virtual TObject* At(Int_t idx) const
        virtual TObject* Before(const TObject* obj) const
           virtual Int_t BinarySearch(TObject* obj, Int_t upto = kMaxInt)
          static TClass* Class()
            virtual void Clear(Option_t* option)
            virtual void Compress()
            virtual void Delete(Option_t* option)
            virtual void Expand(Int_t newSize)
        virtual TObject* First() const
                   Int_t GetEntries() const
                   Int_t GetEntriesFast() const
                   Int_t GetLast() const
       virtual TObject** GetObjectRef(const TObject* obj) const
             TProcessID* GetPID() const
                  UInt_t GetUID(Int_t at) const
           virtual Int_t IndexOf(const TObject* obj) const
         virtual TClass* IsA() const
          virtual Bool_t IsEmpty() const
        virtual TObject* Last() const
                   Int_t LowerBound() const
      virtual TIterator* MakeIterator(Bool_t dir = kIterForward) const
        virtual TObject* operator[](Int_t i) const
        virtual TObject* Remove(TObject* obj)
        virtual TObject* RemoveAt(Int_t idx)
                    void SetLast(Int_t last)
            virtual void ShowMembers(TMemberInspector& insp, char* parent)
            virtual void Sort(Int_t upto = kMaxInt)
            virtual void Streamer(TBuffer& b)
                    void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

      TProcessID* fPID         Pointer to Process Unique Identifier
          UInt_t* fUIDs        [fSize] To store uids of referenced objects
            Int_t fLowerBound  Lower bound of the array
            Int_t fLast        Last element in array containing an object

Class Description

                                                                      
 TRefArray                                                            
                                                                      
 An array of references to TObjects. The array expands automatically  
 when  objects are added (shrinking can be done by hand using Expand()
                                                                      
 The TRefArray can be filled with:                                    
     array.Add(obj)                                                   
     array.AddAt(obj,i)                                               
     but not array[i] = obj  !!!                                      
                                                                      
 The array elements can be retrieved with:                            
     TObject *obj = array.At(i);                                      
                                                                      
 When a TRefArray is Streamed, only the pointer unique id is written, 
 not the referenced object. TRefArray may be assigned to different    
 branches of one Tree or several Trees.                               
 The branch containing the TRefArray can be read before or after the  
 array (eg TClonesArray, STL vector,..) of the referenced objects.    
                                                                      
 See an example in $ROOTSYS/test/Event.h                              
                                                                      
 RESTRICTIONS when using TRefArray                                    
 ---------------------------------                                    
  - Elements in a TRefArray cannot point to a TFile or TDirectory.    
  - All elements of a TRefArray must be set in the same process,      
    In particular, one cannot modify some elements of the array in    
    a different process.                                              
 Use an array of TRef when one of the above restrictions is met.      
                                                                      

 default constructor

 Create an object array. Using s one can set the array size
 and lowerBound can be used to set the array lowerbound
 index (default is 0).

 Create a copy of TRefArray a. Note, does not copy the kIsOwner flag.

 Delete an array. Objects are not deleted unless the TRefArray is the
 owner (set via SetOwner()).

 Add object in the first slot of the array. This will overwrite the
 first element that might have been there. To have insertion semantics
 use either a TList or a TOrdCollection.

 Add object in the next empty slot in the array. Expand the array
 if necessary.

 Add object in the slot before object before. If before=0 add object
 in the first slot. Note that this will overwrite any object that
 might have already been in this slot. For insertion semantics use
 either a TList or a TOrdCollection.

 Add object in the slot after object after. If after=0 add object in
 the last empty slot. Note that this will overwrite any object that
 might have already been in this slot. For insertion semantics use
 either a TList or a TOrdCollection.

 Add object at position idx. If idx is larger than the current size
 of the array, expand the array (double its size).

 Add object at position ids. Give an error when idx is out of bounds
 (i.e. the array is not expanded).

 Return the position of the new object.
 Find the first empty cell or AddLast if there is no empty cell

 Return the object after obj. Returns 0 if obj is last object.

 Return the object before obj. Returns 0 if obj is first object.

 Remove all objects from the array. Does not delete the objects
 unless the TRefArray is the owner (set via SetOwner()).

 Remove empty slots from array.

 Remove all objects from the array.

 Expand or shrink the array to newSize elements.

 Stream all objects in the array to or from the I/O buffer.

 Return the object in the first slot.

 Return the object in the last filled slot. Returns 0 if no entries.

 Return the number of objects in array (i.e. number of non-empty slots).
 Attention: use this method ONLY if you want to know the number of
 non-empty slots. This function loops over the complete array and
 is therefore very slow when applied in a loop. Most of the time you
 better use GetLast()+1.

 Return absolute index to last object in array. Returns -1 in case
 array is empty.

 Return index of last object in array. Returns lowerBound-1 in case
 array is empty.

 Return address of pointer obj.

 Return UID of element at.

 obj != 0 Return index of object in array.
          Returns lowerBound-1 in case array doesn't contain the obj.

 obj == 0 Return the index of the first empty slot.
          Returns lowerBound-1 in case array doesn't contain any empty slot.

 Initialize a TRefArray.

 Returns an array iterator.

 Generate an out-of-bounds error. Always returns false.

 Remove object at index idx.

 Remove object from array.

 Set index of last object in array, effectively truncating the
 array. Use carefully since whenever last position has to be
 recalculated, e.g. after a Remove() or Sort() it will be reset
 to the last non-empty slot. If last is -2 this will force the
 recalculation of the last used slot.

 If objects in array are sortable (i.e. IsSortable() returns true
 for all objects) then sort array.

 Find object using a binary search. Array must first have been sorted.
 Search can be limited by setting upto to desired index.

Inline Functions

             Bool_t BoundsOk(const char* where, Int_t at) const
              Int_t GetEntriesFast() const
        TProcessID* GetPID() const
             Bool_t IsEmpty() const
               void Add(TObject* obj)
           TObject* At(Int_t idx) const
           TObject* operator[](Int_t i) const
              Int_t LowerBound() const
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void StreamerNVirtual(TBuffer& b)