Subj : Re: my next newbie question
To   : Ronald Kent Gibson <Kent.Gibson@icongmbh.de>
From : Igor Bukanov <igor@fastmail.fm>
Date : Thu Mar 04 2004 04:31 pm

Ronald Kent Gibson wrote:
> ok so now I am playing with the idea of generating the javascript class and
> then accessing it from java so I wrote this program.
> 
> function getValue()
> {
> x = 1;
> y = 2;
> z = x + y;
> return z;
> }
> 
> But when I decompile it there is no getValue method.
> 
> hmm. so How would I access this function?

JavaScript functions are not compiled to correspondingly named methods 
of byte code.

To access the function you have to use -extends or -implements options 
to http://www.mozilla.org/rhino/jsc.html to make the resulting script 
file to extend the given interface and then in you Java program cast a 
script instance to that class or interface.

Another option is to take advantage of the fact that the main class file 
for the script implements org.mozilla.javascript.Script interface. Then 
you create an instance of the class, call Script.exec(cx, scope) which 
would define all script functions in the supplied scope so you can use 
later:

ScriptableObject.callMethod(scope, "getValue", Context.emptyArgs) to 
call the method.

Regards, Igor

.