1 // @(#)root/cont:$Id$
2 // Author: Fons Rademakers 13/08/95
3
4 /*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12 #ifndef ROOT_TIterator
13 #define ROOT_TIterator
14
15
16 //////////////////////////////////////////////////////////////////////////
17 // //
18 // TIterator //
19 // //
20 // Iterator abstract base class. This base class provides the interface //
21 // for collection iterators. //
22 // //
23 //////////////////////////////////////////////////////////////////////////
24
25 #ifndef ROOT_Rtypes
26 #include "Rtypes.h"
27 #endif
28
29 class TCollection;
30 class TObject;
31
32 class TIterator {
33
34 protected:
35 TIterator() { }
36 TIterator(const TIterator &) { }
37
38 public:
39 virtual TIterator &operator=(const TIterator &) { return *this; }
40 virtual ~TIterator() { }
41 virtual const TCollection *GetCollection() const = 0;
42 virtual Option_t *GetOption() const { return ""; }
43 virtual TObject *Next() = 0;
44 virtual void Reset() = 0;
45 TObject *operator()() { return Next(); }
46 virtual Bool_t operator!=(const TIterator &) const;
47 Bool_t operator==(const TIterator & other) const { return !(*this != other); }
48 virtual TObject *operator*() const;
49
50 ClassDef(TIterator,0) //Iterator abstract base class
51 };
52
53 #endif
54