Re: itext prototype -- RPG400-L

Hi Basilio,

The error you posted is "java.lang.NoSuchMethodError": This error isnot related to the classpath. If this had been a classpath error, itwould've complained that it couldn't find a class definition -- butthat's not the case here, here it says it can't find a method.

Java searches the class (which it has already found) to find the method.In order for it to find it, two different criteria have to match, themethod name ("add" in this situation) and the method'ssignature('(Lcom.lowagie.text.Paragraph;)V" in this situation. Bothhave to match, or it will give you the NoSuchMethodError that you'veposted to this mailing list.

Now, I'm not completely familiar with iText, so I ran a quick Googlesearch for the Javadocs for the com.lowagie.text.Document class. Ifound them at the following link, but I have no idea if that's the sameversion that you're using:

http://www.docjar.com/docs/api/com/lowagie/text/Document.html

Although those Javadocs do mention an "add" method, there's no addmethod that matches your signature. The signature is derived from theparameter types and return values. Your prototype is looking for amethod that accepts an Paragraph object as a parameter, and returnsnothing (void). However, the Javadocs reference an Add method thataccepts any object that implements the Element interface, and returns aboolean value. So it makes perfect sense that you'd receive the erroryou're receiving.


Instead, try something like this:

D ITXTElement S O CLASS(*JAVAD :'com.lowagie.text.Element')

D AddParagraphToDocument...D PR 1N ExtProc(*JAVA:D 'com.lowagie.text.Document':D 'add')D peParagraph like(ITXTElement)

When you call the method, you can still pass a Paragraph to it (as youwere already doing) since Paragraph's implement the Element interface.So they're compatible with Elements. But the prototype must referencethe Eleemnt, not the Paragraph, or the signature will be wrong.


Hope that helps.


Basilio Merlino wrote:

 I'm having trouble creating a prototype for the following java code:
document.add(new Paragraph("Hello World") );
 Here's what I have so far:

 D jFileOutputStream...
 D                 S               O   CLASS(*JAVA
 D                                     :'java.io.FileOutputStream')

 D Document        S               O   CLASS(*JAVA
 D                                     :'com.lowagie.text.Document')
D ITXTParagraph S O CLASS(*JAVAD :'com.lowagie.text.Paragraph')
D AddParagraphToDocument...D PR ExtProc(*JAVA:D 'com.lowagie.text.Document':D 'add')D peParagraph like(ITXTParagraph)
 D PdfDocument      S                   LIKE(Document)
 D writerFile       S                   LIKE(jFileOutputStream)
 D ThisWriter       S                   LIKE(PdfWriter)

 D paragraph        S                   LIKE(ITXTParagraph)
  /free
// Document is created without errors (PdfDocument)
   // file output stream is created without errors (writerFile)

  // Paraghraph is created without errors (paragraph)

  AddParagraphToDocument(Document:Paragraph);

  /End-free
The error I get is: Message . . . . : Java exception received when calling Java method.Cause . . . . . : ....Java exception "java.lang.NoSuchMethodError: add" when calling
   method "add" with signature "(Lcom.lowagie.text.Paragraph;)V" in class
"com.lowagie.text.Document".
 I've  checked everything and the spelling and capitalization is
 correct for the prototype.
 The jar file resides at /QIBM/UserData/Java400/ext, so this shouldn't be
 a classpath issue as far as I know.
 Can anyone tell me if they see anything wrong?

 Thanks
 Basilio