Hi Brett,
There are several ways of solving your problem.
- using globals. not encouraged.
- registering your pointers to a standard list
- using folders.
I would recommend the use of TFolder.
You can create a TFolder (say "Registry")
then you post your reg, reg2, etc objects to this folder.
>From the compiled code, you access the folder via
TFolder *folder = (TFolder*)gROOT->FindObjectAny("Registry")
Rene Brun
Brett Viren wrote:
>
> Thanks Rene and Valeriy.
>
> Implementing SavePrimitive() seems like it should work, I'll give it a
> try.
>
> One thing: Assuming I produce output which looks something like:
>
> // output.C file:
> Registry* reg = new Registry()
> reg->Set("key1","val1");
> reg->Set("key2",42);
> reg->Set("key3",6.9);
>
> Registry* reg2 = new Registry();
> reg2->Set("key1","1lav");
> reg2->Set("key2",24);
> reg2->Set("key3",9.6);
>
> reg->Set("reg2",*reg2);
>
> // more state initializations ....
>
> After having CINT read this file back in, I am unsure how to get the
> pointer (reg) to the created Registry object from CINT into my
> compiled code. Also, do I need to explictly tell CINT to delete the
> created pointers (reg and reg2 in the example above)?
>
> Thanks,
> -Brett.
>
> Rene Brun writes:
> > Hi Brett,
> >
> > As already indicated by Valery, implementing MyClass::SavePrimitive
> > is the solution to your problem if you want a readable version of the file.
> > SavePrimitive is implemented for most ROOT classes that appear in a canvas:
> > all graphics primitives, TGraph, TH1, TCanvas, TPad, etc.
> > In SavePrimitive, you generate the C++ code to rebuild the objects with
> > their attributes. This code can be edited and reexecuted by CINT again.
> > I strongly encourage people to implement the SavePrimitive function
> > for their classes.
> >
> > I am also considering the generation of ascii files via the TStreamerInfo
> > class. XML is a likely choice. I agree with you that XML is NOT an input
> > format. I have seen that most attempts to use XML as an input format have
> > failed so far. But XML is a good candidate for an interchange format
> > between different applications when the volume of data to be exchanged is small.
> > The problem is not writing the XML file, but the choice of a good DTD.
> >
> > Rene Brun
> >
> > Brett Viren wrote:
> > >
> > > Hi,
> > >
> > > I have a container class: a heterogeneous map from string keys to
> > > values of type char, int, double, string and itself (that is, it can
> > > be used to form a hierarchical tree). Currently it can be be
> > > read/written via ROOT streamers. It is typically used to hold
> > > configuration data.
> > >
> > > I am looking for a way to write it out as plain text in a form that
> > > can be edited in a text editor and subsequently read back in.
> > >
> > > Does anyone have any ideas? (Please, no XML).
> > >
> > > Thanks,
> > > -Brett.
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