Re: Coding the main method in a Java/RPG call

Walter_Hesius=wRtUmKfndhM@public.gmane.org wrote:
>
> I'm trying (experimenting) to prototype the apache FOP parser.
> This example works fine, but the number of object you can pass, varies.
> If i set DIM to a higher value, i get an java exception:
>

Walter, you have to code a separate array for each number of parameters
you want to pass.  RPG has no concept of varying dimension arrays, so
the RPG compiler always tells Java that the passed array has the
declared length.

  D parms2           s          like(newString)
  D                             dim(2)

  D parms3           s          like(newString)
  D                             dim(3)

  D parms4           s          like(newString)
  D                             dim(4)

  etc.

(When you use the LIKE keyword, you don't also code the type (O).)

Alternatively, you could code the DIM for the maximum, and pass a
place-holder (maybe null strings) in all the unpassed elements.  You
would have to modify your Java main to handle this.  Or you could pass
the number of parameters as the first parameter.  (I don't know that
Java can handle null elements in the String array, but I assume so.)

    parms(1) = newString(%char(3));
    parms(1 + 1) = newString(whatever);
    parms(2 + 1) = newString(whatever);
    parms(3 + 1) = newString(whatever);
    myclassMain (parms);