DataTree/interface/DataObject.h

//--------------------------------------------------------------------------------------------------
// $Id: DataObject.h,v 1.16 2008/12/02 14:17:54 bendavid 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() {}
      ~DataObject() {}

      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)
  };
}

//--------------------------------------------------------------------------------------------------
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.
  
  const Col* colObj=0;
  
  if ( !this->TestBit(kIsReferenced) )
    return colObj;
  
  TRefTable *table = TRefTable::GetRefTable();
  if (!table)
    return colObj;
    
  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));
  table->SetUID(uid, pid);
  table->Notify(); 
  TBranchElement *trackParent = 
    static_cast<TBranchElement*>(table->GetParent(uid, pid));
  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:	1.17
Committed:	Tue Dec 9 17:46:59 2008 UTC (16 years, 4 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
Changes since 1.16:	+5 -2 lines
Log Message:	Added ObjType to retrieve type of object.
#	User	Rev	Content
1	loizides	1.1	//--------------------------------------------------------------------------------------------------
2	loizides	1.17	// $Id: DataObject.h,v 1.16 2008/12/02 14:17:54 bendavid 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			~DataObject() {}
32	loizides	1.6
33	loizides	1.15	Bool_t IsCached() const { return TestBit(23); }
34	loizides	1.9	Bool_t MustClear() const { return TestBit(14); }
35			Bool_t MustDelete() const { return TestBit(15); }
36	loizides	1.17	virtual EObjType ObjType() const { return kDataObject; }
37	loizides	1.15	template <class Col>
38			const Col *ParentCol() const;
39	loizides	1.6
40			protected:
41	loizides	1.8	void ResetCacheBit() { SetBit(23,0); }
42	loizides	1.15	void SetCacheBit() { SetBit(23); }
43			void SetClearBit() { SetBit(14); }
44			void SetDeleteBit() { SetBit(15); }
45	loizides	1.6
46	loizides	1.14	ClassDef(DataObject, 1)
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	bendavid	1.11	const Col* colObj=0;
59	bendavid	1.16
60			if ( !this->TestBit(kIsReferenced) )
61			return colObj;
62
63	bendavid	1.10	TRefTable *table = TRefTable::GetRefTable();
64			if (!table)
65			return colObj;
66	bendavid	1.16
67			UInt_t uid = this->GetUniqueID();
68			//cast away const is a hack, this is fixed in newer root versions
69			TProcessID pid = TProcessID::GetProcessWithUID(uid, const_cast<DataObject>(this));
70			table->SetUID(uid, pid);
71			table->Notify();
72	loizides	1.15	TBranchElement *trackParent =
73	bendavid	1.16	static_cast<TBranchElement*>(table->GetParent(uid, pid));
74	bendavid	1.10	while (!colObj) {
75			if (!trackParent)
76			return colObj;
77	loizides	1.15	colObj = dynamic_cast<Col*>
78	bendavid	1.16	(reinterpret_cast<TObject>(static_cast<TBranchElement>(trackParent)->GetObject()));
79	loizides	1.15	if (colObj)
80			break;
81			trackParent = static_cast<TBranchElement*>(trackParent->GetMother());
82	bendavid	1.10	}
83	loizides	1.15	return colObj;
84	bendavid	1.10	}
85	loizides	1.3	#endif