Re: [ROOT] TClonesArray constructor

From: Sebastien Greder (greder@in2p3.fr)
Date: Fri Apr 11 2003 - 11:28:19 MEST


Hi Rene,

thanks for the reply, but indeed this small script doesn't work for me :

{
TClonesArray* array = new TClonesArray("class",10) ;
if(array->IsZombie()) cout << "is zombie" << endl ;
}

which obviously gives an error message since class is not known but
doesn't return the expected "is zombie" statement.

seb.


ps : I'm running on redhat 7.2, gcc 2.96, version 3.05/02.


On Thu, 10 Apr 2003, Rene Brun wrote:

> Hi Sebastien,
> 
> I cannot reproduce your problem with the test on Zombie.
> Note that in your example, you had a typo, testing on aclone
> instead of aclonesarray.
> 
> I have added the call to MakeZombie in the second TClonesArray 
> constructor. Thanks for this remark.
> 
> Rene Brun
> 
> On Wed, 9 Apr 
> 2003, Sebastien Greder wrote:
> 
> > Hello,
> > 
> > I'm facing a small problem concerning the TClonesArray constructor :
> > 
> >  I create a TClonesArray with the usual constructor :
> >  
> >  TClonesArray* aclone = new TClonesArray("aclassname",100) ;
> >  
> >  If the classname is not known by ROOT (i.e gROOT->GetClass("classname")
> > fails) one gets the message : "classname is not a valid clas name"
> > and MakeZombie() is called .
> > 
> > Since I want to test if the TClonesArray has been successfuly built , that
> > means not only have a message but be able to stop my prog somehow I
> > decided to test the TClonesArray by : aclone->IsZombie() but this doesn't
> > work, so to sum up the code :
> > 
> > TClonesArray* trackarray = 0 ;
> > TClonesArray* muonarray = 0;
> > ....
> > 
> > trackarray = InitArrays(track_branch,trackarray,"Track") ;
> > muonarray = Init...
> > 
> > TClonesArray* InitArrays(TBranchElement* abranch,
> >                          TClonesArray* aclonesarray,
> >                          TString aclassname)
> > {
> > if(abranch) {
> >  aclonesarray = new TClonesArray(aclassname.Data(),100) ;
> >   if(aclone->IsZombie()) return 0 ; 
> >   else {
> >   tree->SetBranchAddress(abranch->GetName(),&aclonesarray);
> >   return aclonesarray ;
> >    }
> >  }
> >  else {
> >  cout << "couldn't find branch" << endl ;
> >  return 0 ;
> >  }
> > }
> > 
> > Am I doing  something wrong ?
> > 
> > Thanks for help,
> > 
> > seb.
> > 
> > ps : by the way the second constructor of TClonesArray :
> > TClonesArray(const TClass *cl,....)
> > 
> > does not have the call MakeZombie() if cl is NULL, just a message error
> > 
> 
> 



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