Re: Fw: java prototypes in RPG

[Carl <c.groner@xxxxxxxxx>]

Hi Phil,

I believe your prototype signature for the POIFSFileSystem constructor
is incorrect, it should be declared to accept a java.io.InputStream as
its only parameter. Since your FileInputStream object is a subclass of
InputStream, you can pass it to the constructor as you are attempting,
but the constructor declaration for the POIFSFileSystem must match the
java declaration.

Carl.

On 4/10/07, phil.groschwitz@xxxxxxxxx <phil.groschwitz@xxxxxxxxx> wrote:
> All,
>
> I'm trying to prototype one of the POI methods in rpg.  I'm having trouble
> with POIFSFileSystem.
>
> In java, this works:
>
> java.io.FileInputStream fis = null;
> fis = new FileInputStream("C:/template/POI-template.xls");
>
> org.apache.poi.poifs.filesystem.POIFSFileSystem poifs = null;
> poifs = new org.apache.poi.poifs.filesystem.POIFSFileSystem(fis);
>
> But it RPG it doesn't.
>
> In RPG, I prototyped POIFSFileSystem like this:
>
>      D jPOIFSFile...
>      D                 pr              O   extproc(*java
>      D
> :'org.apache.poi.poifs.filesystem-
>      D                                     .POIFSFileSystem'
>      D                                     :*CONSTRUCTOR)
>      D                                     class(*java
>      D
> :'org.apache.poi.poifs.filesystem-
>      D                                     .POIFSFileSystem')
>      D  arg0                           O   class(*java
>      D                                     :'java.io.FileInputStream')
>      D
>      D inFile          s               O   class(*JAVA
>      D                                     :'java.io.FileInputStream')
>
>       // filename is a String object
>        inFile = jInFile(filename);
>        poifs = jPOIFSFile(inFile);
>
> When I run it, I get this error:
>
> Message . . . . :   Java exception received when calling Java method.
> Cause . . . . . :   RPG procedure TEST_TEMPL in program QGPL/POITEST
>   received Java exception "java.lang.NoSuchMethodError: <init>" when
> calling
>   method "<init>" with signature "(Ljava.io.FileInputStream;)V" in class
>   "org.apache.poi.poifs.filesystem.POIFSFileSystem".
> I ran the qsh command that the help suggests:
> qsh cmd('javap -s org.apache.poi.poifs.filesystem.POIFSFileSystem')
>
> Which returns (in part) this:
> public
> org.apache.poi.poifs.filesystem.POIFSFileSystem(java.io.InputStream);
>    throws java/io/IOException
>   Signature: (Ljava/io/InputStream;)V
>
> java.io.InputStream is an abstract class.
>
> Anyone have any ideas what I need to do for this to work?
>
> Thanks,
>
> Phil
>
>
>
>
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