tcljava-user

[tcljava-user] Looking for Example

[Dan S. <sc...@is...>]

I'm looking for an example of establishing a callback to a Tcl proc from Java.  What I have in mind
is parsing an XML file with the Xerces SAX parser and having the callbacks go to Tcl procs.  This
may be too convoluted to do but essentially here is roughly the sequence of events:

  Tcl calls Xerces (Java) -->
     Xerces parses XML and calls back to Tcl for each XML node -->
       Tcl procs

I would have to create an interp that my Java callbacks for Xerces could use to call a Tcl proc.  Is
it that simple?

Thanks,

Dan

=================================================
Dan Schenck		mailto:sc...@is...
Technical Principal
The Information Store	http://www.istore.com

10777 Westheimer, Suite 1040
Houston, TX 77042
Ph: 713 787-6798 x166  Fax: 713 787-6772
=================================================

Re: [tcljava-user] Looking for Example

[Mo D. <md...@cy...>]

On Fri, 4 May 2001, Dan Schenck wrote:

> I'm looking for an example of establishing a callback to a Tcl proc from Java.  What I have in mind
> is parsing an XML file with the Xerces SAX parser and having the callbacks go to Tcl procs.  This
> may be too convoluted to do but essentially here is roughly the sequence of events:
> 
>   Tcl calls Xerces (Java) -->
>      Xerces parses XML and calls back to Tcl for each XML node -->
>        Tcl procs
> 
> I would have to create an interp that my Java callbacks for Xerces could use to call a Tcl proc.  Is
> it that simple?

Sure. You just need to create a TclEvent() in Java and add it to
the Tcl event queue.

Take a peek at the processCommand() method in the pyramidpkg demo:

demos/pyramidpkg/AppletConsole.java

You could also take a look at these old posts to the
mailing list on the subject:

http://www.mail-archive.com/tc...@sc.../msg00647.html

http://www.mail-archive.com/tc...@sc.../msg00159.html


If someone is looking for a way to help out, you
could take these examples and create the most
trimmed down callback demo possible. Of course,
some online docs would help too.

cheers
Mo DeJong
Red Hat Inc

Re: [tcljava-user] Looking for Example

[Shawn B. <sh...@qc...>]

Dan Schenck wrote:

> I'm looking for an example of establishing a callback to a Tcl proc from Java.  What I have in mind
> is parsing an XML file with the Xerces SAX parser and having the callbacks go to Tcl procs.  This
> may be too convoluted to do but essentially here is roughly the sequence of events:
>
>   Tcl calls Xerces (Java) -->
>      Xerces parses XML and calls back to Tcl for each XML node -->
>        Tcl procs
>
> I would have to create an interp that my Java callbacks for Xerces could use to call a Tcl proc.  Is
> it that simple?
>

Yes its not very hard. I have done this successfully.

>
> Thanks,
>
> Dan
>
> =================================================
> Dan Schenck             mailto:sc...@is...
> Technical Principal
> The Information Store   http://www.istore.com
>
> 10777 Westheimer, Suite 1040
> Houston, TX 77042
> Ph: 713 787-6798 x166  Fax: 713 787-6772
> =================================================
>
> _______________________________________________
> tcljava-user mailing list
> tcl...@li...
> http://lists.sourceforge.net/lists/listinfo/tcljava-user

--
-Shawn