Except that when I tried your solution, I found that
PdfIndirectReference and PdfWriter.addToBody() are
both package-private so I can't get to them without
modifying the library... :(
-Matt
--- Matt Benson <[EMAIL PROTECTED]> wrote:
> Oops. :) Okay, thanks for the solution, Paulo!
>
> -Matt
>
>
> --- Paulo Soares <[EMAIL PROTECTED]> wrote:
> > And now you have a stream as a direct object,
> which
> > is illegal.
> >
> > Best Regards,
> > Paulo Soares
> >
> > ----- Original Message -----
> > From: "Matt Benson" <[EMAIL PROTECTED]>
> > To: "Paulo Soares" <[EMAIL PROTECTED]>;
> > "itext-questions"
> > <[EMAIL PROTECTED]>
> > Sent: Wednesday, March 12, 2003 23:11
> > Subject: RE: [iText-questions] modifying metadata
> >
> >
> > > Okay, I think I found it. Of course using
> > PRStream
> > > wouldn't be any better than PdfStream because
> > PRStream
> > > extends PdfStream and doesn't override toPdf().
> > > PdfStream.toPdf() is implemented as always
> > returning
> > > null. I didn't know why that should be, so I
> > changed
> > > it. It was:
> > >
> > > public byte[] toPdf(PdfWriter writer) {
> > > dicBytes = super.toPdf(writer);
> > > return null;
> > > }
> > >
> > > but I changed it to:
> > >
> > > public byte[] toPdf(PdfWriter writer) {
> > > dicBytes = super.toPdf(writer);
> > > return dicBytes;
> > > }
> > >
> > > and it seems to work now.
> > >
> > >
> > > -Matt
> > >
> > > --- Matt Benson <[EMAIL PROTECTED]> wrote:
> > > > One obvious problem is that this example was
> > using
> > > > PdfStream, which always returns null from
> toPdf.
> > > > However, I had already been using PRStream
> > before
> > > > that
> > > > with the same results. I am going back to
> > PRStream
> > > > in
> > > > the debugging to which I have been forced to
> > turn,
> > > > due
> > > > to the terrible problem of time zones! :)
> > > >
> > > >
> > > >
> > > > --- Matt Benson <[EMAIL PROTECTED]> wrote:
> > > > > Okay, I am STUCK. I can play with XMP/RDF,
> > that's
> > > > > fine, and I've been doing it. But I am
> > finding
> > > > > myself
> > > > > unable to actually change the metadata of a
> > given
> > > > > PDF.
> > > > > I have culled together a fairly short
> > example;
> > > > can
> > > > > anyone see any obvious problems?
> > > > >
> > > > >
> > > > > import java.io.FileOutputStream;
> > > > > import java.io.BufferedOutputStream;
> > > > > import java.io.ByteArrayOutputStream;
> > > > >
> > > > > import com.lowagie.text.pdf.PdfName;
> > > > > import com.lowagie.text.pdf.PRStream;
> > > > > import com.lowagie.text.pdf.PdfObject;
> > > > > import com.lowagie.text.pdf.PdfReader;
> > > > > import com.lowagie.text.pdf.PdfStream;
> > > > > import com.lowagie.text.pdf.PdfStamper;
> > > > > import com.lowagie.text.pdf.PdfDictionary;
> > > > >
> > > > >
> > > > > public class MinimalModifyPdfMetadata
> > > > > {
> > > > >
> > > > > public byte[] modifyMetadata(String pdf)
> > > > > throws Exception
> > > > > {
> > > > > ByteArrayOutputStream baos = new
> > > > > ByteArrayOutputStream();
> > > > >
> > > > > PdfReader pdfReader = new
> PdfReader(pdf);
> > > > > byte[] b =
> > > > >
> > > >
> > >
> >
>
PdfReader.getStreamBytes((PRStream)(PdfReader.getPdfObject(
> > > > > pdfReader.getCatalog().get(new
> > > > > PdfName("Metadata")))),
> > pdfReader.getSafeFile());
> > > > >
> > > > > System.out.println("original metadata");
> > > > > System.out.println(new String(b));
> > > > >
> > > > > PdfStamper stamp = new
> > PdfStamper(pdfReader,
> > > > > baos);
> > > > >
> > > > > //set the metadata
> > > > > pdfReader.getCatalog().put(new
> > > > > PdfName("Metadata"), new PdfStream(b));
> > > > >
> > > > > try
> > > > > {
> > > > > stamp.close();
> > > > > }//end try
> > > > > catch (Exception ex)
> > > > > {
> > > > > ex.printStackTrace(System.err);
> > > > > }//end catch Exception
> > > > >
> > > > > return baos.toByteArray();
> > > > > }//end modifyMetadata
> > > > >
> > > > >
> > > > > public static void main(String[] args)
> > > > > throws Exception
> > > > > {
> > > > > int code = 0;
> > > > >
> > > > > if (args.length > 1)
> > > > > {
> > > > > BufferedOutputStream bos
> > > > > = new BufferedOutputStream(new
> > > > > FileOutputStream(args[1]));
> > > > >
> > > > > bos.write(new
> > > > >
> > > >
> >
> MinimalModifyPdfMetadata().modifyMetadata(args[0]));
> > > > > bos.close();
> > > > > }//end if at least 2 args
> > > > > else
> > > > > {
> > > > > System.err.println(
> > > > > "Usage: MinimalModifyPdfMetadata
> > > > input-file
> > > > > output-file");
> > > > > }//end else, wrong # of args
> > > > >
> > > > > System.exit(code);
> > > > > }//end main
> > > > >
> > > > > }//end class MinimalModifyPdfMetadata
> > > > >
> > > > >
> > > > > I get the following stack trace when I run
> the
> > > > above
> > > > > code:
> > > > >
> > > > > java.lang.NullPointerException
> > > > > at
> > > > >
> > java.io.OutputStream.write(OutputStream.java:65)
> > > > > at
> > > > >
> > > >
> > >
> >
>
com.lowagie.text.pdf.PdfDictionary.toPdf(PdfDictionary.java:152)
> > > > > at
> > > > >
> > > >
> > >
> >
>
com.lowagie.text.pdf.PdfIndirectObject.<init>(PdfIndirectObject.java:
> > > > > 138)
> > > > > at
> > > > >
> > > >
> > >
> >
>
com.lowagie.text.pdf.PdfIndirectObject.<init>(PdfIndirectObject.java:
>
=== message truncated ===
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