RE: TDirectory::Get...

Hi Thomas,

Yes the object will still be valid __unless__ it is an histogram, tree or event list. Those 3 types of objects are by default owner by the file they are read from.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk_at_pcroot.cern.ch [mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of Thomas Bretz
Sent: Monday, April 18, 2005 10:12 AM
To: roottalk_at_pcroot.cern.ch
Subject: [ROOT] TDirectory::Get...

Hi,

there is something which is not clear to me, maybe you can help: If I get an object using TDirectory::Get, is this object still valid when the file is closed?

Would the following work?

TObject *ReadObject(const char *filename, const char *objname)
{

    TFile f(filename, "READ");
    return f.Get(objname);
}

void main()
{

    TObject *o = ReadObject("myfile.root", "MyObject");     // Do something with it
    delete o;
}

Thanks,
Thomas. Received on Mon Apr 18 2005 - 20:47:23 MEST