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/JDCBook/jnistring.html#array
from Sun's JNI tutorial (Sun uses C/C++, but the coding for JNI is quite
similar between C and RPG).)