How to find custom class?

ROOT
1

Dear fellow Root users,

I often use the very convenient function gROOT->FindObject(const char *name) but I found, that it is unable to find objects of custom classes loaded as shared libraries. As an example, I changed the class Event from the root/test/ directory to be a child class of TNamed instead of TObject. When I create an event and give it a name, I still can’t find it with gROOT->FindObject

root [0] .L libEvent.so
root [1] Event *ev = new Event()
root [2] ev->SetName("event")
root [3] .ls
root [4] gROOT->FindObject("event")
(const class TObject*)0x0

Only after I save it to a ROOT file, I can find it:

root [5] TFile *file = new TFile("test.root", "RECREATE")
root [6] ev->Write()
(Int_t)312
root [7] .ls
TFile**         test.root
 TFile*         test.root
  KEY: Event    event;1
  KEY: TProcessID       ProcessID0;1    00f0ff66-45d4-11e2-9717-1d4ee684beef
root [8] gROOT->FindObject("event")
(const class TObject*)0x145dde0

But this is of cause inconvenient. I am very thankful for suggestions on how to better handle custom classes.

Thank you in advance,
Jules

2

gROOT->Add(ev); // … or … gROOT->Append(ev);

3

This was exactly what I was looking for!

Thank you very much,
Jules