DataCont/interface/BaseCollection.h

//--------------------------------------------------------------------------------------------------
// $Id: BaseCollection.h,v 1.3 2008/12/10 11:25:00 loizides Exp $
//
// BaseCollection
//
// Base collection class (virtual) to allow efficient resetting in TAM.
//
// Authors: C.Loizides
//--------------------------------------------------------------------------------------------------

#ifndef MITANA_DATACONT_BASECOLLECTION_H
#define MITANA_DATACONT_BASECOLLECTION_H
 
#include <TObject.h>

namespace mithep 
{
  class BaseCollection : public TObject 
  {
    public:
      BaseCollection() : fEntries(-1) {}

      void                         Clear(Option_t */*opt*/="")           { fEntries = -1; }
      UInt_t                       Entries()                      const;
      virtual UInt_t               GetEntries()                   const = 0;
      virtual TObject             *ObjAt(UInt_t idx)                    = 0;
      virtual const TObject       *ObjAt(UInt_t idx)              const = 0;
      virtual Bool_t               IsOwner()                      const = 0;
      virtual void                 Reset()                              = 0;
      virtual void                 Trim()                               = 0;

    protected:
      mutable Int_t                fEntries; //!cached number of entries

    ClassDef(BaseCollection, 1) // Base class of all our collections
  };
}

//--------------------------------------------------------------------------------------------------
inline UInt_t mithep::BaseCollection::Entries() const
{
  // Return cached number of entries

  if (fEntries<0)
    fEntries = GetEntries();
  return fEntries;
}
#endif
Revision:	1.4
Committed:	Fri Mar 6 13:52:54 2009 UTC (16 years, 2 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+17 -3 lines
Log Message:	Have Entries also implemented for BaseCollection avoiding successive virtual calls.
#	User	Rev	Content
1	loizides	1.1	//--------------------------------------------------------------------------------------------------
2	loizides	1.4	// $Id: BaseCollection.h,v 1.3 2008/12/10 11:25:00 loizides Exp $
3	loizides	1.1	//
4			// BaseCollection
5			//
6			// Base collection class (virtual) to allow efficient resetting in TAM.
7			//
8			// Authors: C.Loizides
9			//--------------------------------------------------------------------------------------------------
10
11	loizides	1.2	#ifndef MITANA_DATACONT_BASECOLLECTION_H
12			#define MITANA_DATACONT_BASECOLLECTION_H
13	loizides	1.1
14			#include <TObject.h>
15
16			namespace mithep
17			{
18			class BaseCollection : public TObject
19			{
20			public:
21	loizides	1.4	BaseCollection() : fEntries(-1) {}
22	loizides	1.1
23	loizides	1.4	void Clear(Option_t /opt*/="") { fEntries = -1; }
24			UInt_t Entries() const;
25	loizides	1.1	virtual UInt_t GetEntries() const = 0;
26	loizides	1.3	virtual TObject *ObjAt(UInt_t idx) = 0;
27			virtual const TObject *ObjAt(UInt_t idx) const = 0;
28	loizides	1.1	virtual Bool_t IsOwner() const = 0;
29			virtual void Reset() = 0;
30			virtual void Trim() = 0;
31
32	loizides	1.4	protected:
33			mutable Int_t fEntries; //!cached number of entries
34
35	loizides	1.3	ClassDef(BaseCollection, 1) // Base class of all our collections
36	loizides	1.1	};
37			}
38	loizides	1.4
39			//--------------------------------------------------------------------------------------------------
40			inline UInt_t mithep::BaseCollection::Entries() const
41			{
42			// Return cached number of entries
43
44			if (fEntries<0)
45			fEntries = GetEntries();
46			return fEntries;
47			}
48	loizides	1.1	#endif