[izpack-users] Feature Request - Scripting Languages for custom actions

[Matthew Inger]

Mark,

The following code snipped for bsf reveals to me that it would be easy to do
what is needed, given that the
scripting languages support anonymous functions.

BSFManager manager = new BSFManager();
manager.declareBean("file", file File.class);
manager.declareBean("pack", pack, PackFile.class);
BSFEngine engine = manager.loadScriptingEngine("groovy");
engine.iexec(srcFileName, 1, 1, scriptContent);
engine.iexec(srcFileName, 1, 1, "beforeFile(file, pack);");

And the scriptContent would be a groovy closure, something like:

beforeFile = {
   print file;
   print "\n";
   print pack;
   print "\n";
};


To see if a given function exists, we would have to lookup the function
reference:

// This throws an exception if the function is not defined
// For groovy, it return the function closure.
Object functionRef = engine.eval("", 1, 1, "beforeFile");


If this is reliable enough, I'm ok with that sort of implementation.

Any input would be very helpful here.


On Dec 28, 2007 9:08 PM, Mark Fortner <phidias51 at yahoo.com> wrote:

> I sent this to the list earlier, but it somehow didn't make it
> through.  You'll find more information on BSF at
> http://jakarta.apache.org/bsf
>
> On Dec 22, 2007 8:38 AM, Mark Fortner <phidias51 at gmail.com> wrote:
> > The tags that you propose seem groovy-centric. I was wondering if you
> > had any thoughts about how multiple languages would be supported?
> > Would a general-purpose <script> tag work better -- along the lines of
> > the Ant script tag.
> >
> > <script language="text/javascript" src="installer.js" />
> >
> > <script language="text/groovy">
> > <![CDATA[
> >         void beforePacks(
> com.izforge.izpack.installer.AutomatedInstallData
> > idata,
> >                                   java.lang.Integer npacks,
> >
> > com.izforge.izpack.util.AbstractUIProgressHandler handler)
> >         {
> >            // do your groovy scripting here
> >         }
> >     ]]>
> > </script>
> >
> > The flexibility to be able to either embed or refer to a script (as
> > Julien suggested)  would be useful.
> >
> > Also, being able to support scripting through either BSF or Java 6's
> > built-in support would be useful.  This would insure that the
> > scripting functionality is available in both 1.4 and 1.5.  BSF
> > supports JSR-223 scripting engines.
> >
> > Regards,
> >
> > Mark
> >
> >
> > On Dec 21, 2007 12:10 PM, Matthew Inger <mattinger at gmail.com> wrote:
> >  [snip]
> >
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