DataTree/interface/DataObject.h

//--------------------------------------------------------------------------------------------------
// $Id: DataObject.h,v 1.19 2009/02/18 15:38:54 loizides Exp $
//
// DataObject
//
// This is the common base class for all objects in the tree that do require the TObject
// bits to be written out (as opposed to DataBase). Typically these are all objects that
// can be persistently linked.
//
// Authors: C.Loizides, J.Bendavid
//--------------------------------------------------------------------------------------------------

#ifndef MITANA_DATATREE_DATAOBJECT_H
#define MITANA_DATATREE_DATAOBJECT_H
 
#include "MitAna/DataTree/interface/Types.h"
#include "MitAna/DataTree/interface/ObjTypes.h"
#include <TObject.h>
#include <TROOT.h>
#include <TClass.h>
#include <TBranchElement.h>
#include <TRefTable.h>
#include <TProcessID.h>

namespace mithep
{
  class DataObject : public TObject
  {
    public:
      DataObject() {}

      Bool_t               Is(EObjType t) const { return (ObjType()==t); }
      Bool_t               IsCached()     const { return TestBit(23);    }
      Bool_t               MustClear()    const { return TestBit(14);    }
      Bool_t               MustDelete()   const { return TestBit(15);    }
      virtual EObjType     ObjType()      const { return kDataObject;    }
      template <class Col> 
      const Col           *ParentCol()    const;

    protected:
      void                 ResetCacheBit()      { SetBit(23,0);          }
      void                 SetCacheBit()        { SetBit(23);            }
      void                 SetClearBit()        { SetBit(14);            }
      void                 SetDeleteBit()       { SetBit(15);            }

    ClassDef(DataObject, 1) // Common base for objects that do get referenced
  };
}

//--------------------------------------------------------------------------------------------------
template <class Col>
const Col* mithep::DataObject::ParentCol() const
{
  // Return pointer to parent collection. SLOW, but faster than looping over collections!
  // Also note this function will only work for objects which were referenced prior to being 
  // written. Otherwise a null pointer will be returned.
  
  if (!this->TestBit(kIsReferenced))
    return 0;
  
  TRefTable *table = TRefTable::GetRefTable();
  if (!table)
    return 0;
    
  UInt_t uid = this->GetUniqueID();
  //cast away const is a hack, this is fixed in newer ROOT versions
  TProcessID *pid = TProcessID::GetProcessWithUID(uid, const_cast<DataObject*>(this));
  if (!pid) 
    return 0;
  table->SetUID(uid, pid);
  table->Notify(); 

  TBranchElement *trackParent = 
    static_cast<TBranchElement*>(table->GetParent(uid, pid));
  if (!trackParent)
    return 0;

  const Col *colObj=0;

  while (!colObj) {
    if (!trackParent)
      return colObj;
    colObj = dynamic_cast<Col*>
      (reinterpret_cast<TObject*>(static_cast<TBranchElement*>(trackParent)->GetObject()));
    if (colObj)
      break;
    trackParent = static_cast<TBranchElement*>(trackParent->GetMother());
  }
  return colObj;
}
#endif
Revision:	1.20
Committed:	Tue Mar 3 17:04:09 2009 UTC (16 years, 2 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
CVS Tags:	Mit_009c, Mit_009b, Mit_009a, Mit_009, Mit_008, Mit_008pre2, Mit_008pre1
Changes since 1.19:	+5 -5 lines
Log Message:	Cleanup and double32.
#	User	Rev	Content
1	loizides	1.1	//--------------------------------------------------------------------------------------------------
2	loizides	1.20	// $Id: DataObject.h,v 1.19 2009/02/18 15:38:54 loizides Exp $
3	loizides	1.1	//
4			// DataObject
5			//
6	loizides	1.15	// This is the common base class for all objects in the tree that do require the TObject
7	loizides	1.17	// bits to be written out (as opposed to DataBase). Typically these are all objects that
8			// can be persistently linked.
9	loizides	1.2	//
10	bendavid	1.11	// Authors: C.Loizides, J.Bendavid
11	loizides	1.1	//--------------------------------------------------------------------------------------------------
12
13	loizides	1.13	#ifndef MITANA_DATATREE_DATAOBJECT_H
14			#define MITANA_DATATREE_DATAOBJECT_H
15	loizides	1.4
16	loizides	1.15	#include "MitAna/DataTree/interface/Types.h"
17	loizides	1.17	#include "MitAna/DataTree/interface/ObjTypes.h"
18	loizides	1.4	#include <TObject.h>
19	bendavid	1.10	#include <TROOT.h>
20			#include <TClass.h>
21			#include <TBranchElement.h>
22			#include <TRefTable.h>
23			#include <TProcessID.h>
24	loizides	1.4
25	paus	1.12	namespace mithep
26	loizides	1.1	{
27			class DataObject : public TObject
28			{
29			public:
30			DataObject() {}
31	loizides	1.6
32	loizides	1.18	Bool_t Is(EObjType t) const { return (ObjType()==t); }
33			Bool_t IsCached() const { return TestBit(23); }
34			Bool_t MustClear() const { return TestBit(14); }
35			Bool_t MustDelete() const { return TestBit(15); }
36			virtual EObjType ObjType() const { return kDataObject; }
37	loizides	1.15	template <class Col>
38	loizides	1.18	const Col *ParentCol() const;
39	loizides	1.6
40			protected:
41	loizides	1.20	void ResetCacheBit() { SetBit(23,0); }
42			void SetCacheBit() { SetBit(23); }
43			void SetClearBit() { SetBit(14); }
44			void SetDeleteBit() { SetBit(15); }
45	loizides	1.6
46	loizides	1.19	ClassDef(DataObject, 1) // Common base for objects that do get referenced
47	loizides	1.1	};
48	loizides	1.2	}
49	bendavid	1.10
50			//--------------------------------------------------------------------------------------------------
51			template <class Col>
52	bendavid	1.11	const Col* mithep::DataObject::ParentCol() const
53	bendavid	1.10	{
54	loizides	1.15	// Return pointer to parent collection. SLOW, but faster than looping over collections!
55			// Also note this function will only work for objects which were referenced prior to being
56			// written. Otherwise a null pointer will be returned.
57	bendavid	1.10
58	loizides	1.19	if (!this->TestBit(kIsReferenced))
59			return 0;
60	bendavid	1.16
61	bendavid	1.10	TRefTable *table = TRefTable::GetRefTable();
62			if (!table)
63	loizides	1.19	return 0;
64	bendavid	1.16
65			UInt_t uid = this->GetUniqueID();
66	loizides	1.19	//cast away const is a hack, this is fixed in newer ROOT versions
67	bendavid	1.16	TProcessID pid = TProcessID::GetProcessWithUID(uid, const_cast<DataObject>(this));
68	loizides	1.19	if (!pid)
69			return 0;
70	bendavid	1.16	table->SetUID(uid, pid);
71			table->Notify();
72	loizides	1.19
73	loizides	1.15	TBranchElement *trackParent =
74	bendavid	1.16	static_cast<TBranchElement*>(table->GetParent(uid, pid));
75	loizides	1.19	if (!trackParent)
76			return 0;
77
78			const Col *colObj=0;
79
80	bendavid	1.10	while (!colObj) {
81			if (!trackParent)
82			return colObj;
83	loizides	1.15	colObj = dynamic_cast<Col*>
84	bendavid	1.16	(reinterpret_cast<TObject>(static_cast<TBranchElement>(trackParent)->GetObject()));
85	loizides	1.15	if (colObj)
86			break;
87			trackParent = static_cast<TBranchElement*>(trackParent->GetMother());
88	bendavid	1.10	}
89	loizides	1.15	return colObj;
90	bendavid	1.10	}
91	loizides	1.3	#endif