Hee hee!  Great minds, Sarah...

I came up with yet one more possibility: a service program procedure that
takes an object and five or six different variables of different types.  The
beauty of RPG procedures is that all the parameters can be bidirectional,
right?  So it would be something like this:

d ConvertObject   pr             3u 0                  
d   object                        O
d   alpha                       64a    varying                
d   binary                      20u 0 
d   decimal                     30s15 
d   logical                       n   
d   date                          d
d   timestamp                     z

d  wObject        s               o    class(*java:'java.lang.Object')
d  wAlpha         s             64a    varying                
d  wBinary        s             20u 0 
d  wDecimal       s             30s15 
d  wLogical       s               n   
d  wDate          s               d
d  wTimestamp     s               z

You do:

 /free
  object = getColumn(3);
  vartype = ConvertObject(object: wAlpha: wBinary: wDecimal (...));
  select;
    when vartype = 1;
      (process wAlpha)
    when vartype = 2;
      (process wBinary)
  endsl;
 /end-free

The job of ConvertObject would be to do the instanceOf checking and then
convert the object appropriately into one and only one of the parameters.
If it was unconvertible, you could return a negative value or something.
Ahhhh... so many ways to skin the cat!

Joe

> -----Original Message-----
> From: Sarah Poger Gladstone
> 
> Joe- Perhaps an approach that combines your idea and mine. The
> getColumn() method returns an Object, then another program takes the
> object and calls the "instanceOf()" method to find out the actual
> class, then it fills in the data structure that you proposed. Then
> passes a pointer to the populated datastructure back.
> Using this combined approach, the "getColumn()" method doesn't have to
> deal with populating the datastructure.
> 
> It would also simplify error handling. If the "instanceOf" method
> returns something that is not usable from RPG, then the Java program
> can throw/log an exception.
> 
> -Sarah Poger Gladstone



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