I would look at the org.mozilla.javascript.tools.shell.Global class as
an example of this: specifically the defineFunctionProperties()
method.
On Jul 21, 7:11 pm, Ivan Voras <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I've just started exploring Rhino and one of the first things I'd like
> to do is add a global "println" function that my JS scripts can use, and
> then add more functions. The idea is that the added function must be
> able to access internal state so my first attempt was to create a
> ScriptableObject-based class with a method called "println" and use it
> as a starting scope as in:
>
> stdlib = new MyStdLib();
> cx.initStandardObjects(stdlib)
> Script s = ...
> s.exec(cx, stdlib);
> ...
>
> This didn't work, and after a lot of trial and error I got to a point
> where the following works:
>
> MyStdLib stdlib = new MyStdLib(zr);
> Context cx = jscf.enterContext();
> Scriptable scope = cx.initStandardObjects(stdlib);
> Script s = ...
> s.exec(cx, scope);
>
> and the MyStdLib class looks like:
>
> class MyStdLib extends ScriptableObject
> {
>
> private InternalData zr;
>
> protected MyStdLib(InternalData zr)
> {
> this.zr = zr;
> try {
>
> /* This is the important bit */
> FunctionObject println = new FunctionObject("println",
> MyStdLib.class.getDeclaredMethod("js_println", Context.class,
> Scriptable.class, Object[].class, Function.class), this);
>
> this.put("println", this, println);
>
> } catch (Exception ex) {
>
> Logger.getLogger(MyStdLib.class.getName()).log(Level.SEVERE, null, ex);
> }
> }
>
> @Override
> public String getClassName() {
> return "MyStdLib";
> }
>
> protected static Object js_println(Context cx, Scriptable thisObj,
> Object[] args, Function func)
> {
> if (!(thisObj instanceof MyStdLib)) {
> Context.reportError("Not based in MyStdLib");
> return null;
> }
>
> MyStdLib stdlib = (MyStdLib) thisObj;
> for (int i = 0; i < args.length; i++) {
> stdlib.zr.out.print(args[i]);
> if (i != args.length-1)
> stdlib.zr.out.print(" ");
> }
> stdlib.zr.out.println();
> return null;
> }
>
> }
>
> The question is: this looks somewhat "dirty" - isn't there a way I can
> simply declare functions and they get automagically exported to the JS
> scope? I tried creating jsFunction_println in MyStdLib but it isn't
> picked up.
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