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Reference Guide
TRefArrayProxy.cxx
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1 // @(#)root/meta:$Id$
2 // Author: Markus Frank 10/02/2006
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 #include "TRefArray.h"
13 #include "TRefArrayProxy.h"
14 #include "TFormLeafInfoReference.h"
15 
16 /** \class TRefArrayProxy
17 A container proxy, which allows to access references stored
18 in a TRefArray from TTree::Draw
19 */
20 
21 ////////////////////////////////////////////////////////////////////////////////
22 /// Access referenced object(-data)
23 
24 void* TRefArrayProxy::GetObject(TFormLeafInfoReference* /*info*/, void* data, Int_t instance) {
25  TRefArray* ref = (TRefArray*)data;//((char*)data + info->GetOffset());
26  return ref->At(instance);
27 }
28 
29 ////////////////////////////////////////////////////////////////////////////////
30 /// TVirtualRefProxy overload: Access to container size (if container reference (ie TRefArray) etc)
31 
33  TRefArray* ref = (TRefArray*)data;
34  return ref->GetEntriesFast();
35 }
A small helper class to implement the following of reference objects stored in a TTree.
int Int_t
Definition: RtypesCore.h:41
An array of references to TObjects.
Definition: TRefArray.h:39
TObject * At(Int_t idx) const
Definition: TRefArray.h:180
Int_t GetEntriesFast() const
Definition: TRefArray.h:70
virtual void * GetObject(TFormLeafInfoReference *info, void *data, Int_t instance)
Access referenced object(-data)
virtual Int_t GetCounterValue(TFormLeafInfoReference *info, void *data)
TVirtualRefProxy overload: Access to container size (if container reference (ie TRefArray) etc) ...