RE: RPG Calling Java, Array parameter passing

["Christen, Duane J." <dchristen@xxxxxxxxxxxxx>]

Thanks again Barbra;

What do you want for Christmas?

Duane Christen


> -----Original Message-----
> From: Barbara Morris [mailto:bmorris@xxxxxxxxxx]
> Sent: Friday, November 05, 2004 9:07 AM
> To: rpg400-l@xxxxxxxxxxxx
> Subject: Re: RPG Calling Java, Array parameter passing
> 
> 
> "Christen, Duane J." wrote:
> > 
> > I have a java method that I am calling from RPG, which 
> seems not to be
> > receiving the tns parameter. When I debug the method the 
> variable tns is not
> > available (CPF7E12), and errors out deep inside the soap 
> process. When the
> > method is called from a java program, the method works.
> > 
> > I think that the problem is that the string array is not 
> being passed
> > correctly but I can't determine why.
> > 
> 
> The call to the Java method will pass an array with a dimension of
> 32767.  If aniList.Elements is less than 32767, some of the elements
> will be null.  It looks like the method doesn't support null 
> objects in
> the array.
> 
> If you are on V5R3, you can use %SUBARR to specify the number of
> elements to pass.  You'll have to add CONST to the prototype for the
> array parameter.
> 
>      jTnList = getSpecificTnList(jLTAConnection(spidIndex) :
> %subarr(jANIs : 1 : aniList.Elements)); 
> 
> If you are not on V5R3, I think you'll have to write a Java wrapper
> method that your RPG program can call, passing an extra 
> parameter of the
> number of elements to use from the array.  Or you could directly write
> your own JNI to call the method.  (The ILE RPG Programmer's Guide has
> some examples of calling JNI directly; you could use those 
> examples for
> the basics of RPG JNI, along with the array-handling examples
> http://java.sun.com/developer/onlineTraining/Programming/JDCBo
ok/jnistring.html#array
from Sun's JNI tutorial (Sun uses C/C++, but the coding for JNI is quite
similar between C and RPG).)

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