PdfStamperImp enhancements for keeping the integrity of the original PDF

["Paulo Soares" <psoares (at) consiste.pt>]

Use PdfStamper.insertPage()

> -----Original Message-----
> From: itext-questions-admin (at) lists.sourceforge.net 
> [mailto:itext-questions-admin (at) lists.sourceforge.net] On 
> Behalf Of Tenesi
> Sent: Thursday, February 09, 2006 3:15 PM
> To: itext-questions (at) lists.sourceforge.net
> Subject: Re: [iText-questions] PdfStamperImp enhancements for 
> keeping the integrity of the original PDF
> 
> 
> Thanks for the prompt good news.
> 
> Would you please let me know what is wrong with this snippet 
> and What would be the right approach to do it?
> 
> 
>  FileOutputStream os= new FileOutputStream("final.pdf"); // The target
>  com.lowagie.text.pdf.PdfReader baseR = new 
> com.lowagie.text.pdf.PdfReader("base.pdf"); // The base file 
>  com.lowagie.text.pdf.PdfStamper update = new 
> com.lowagie.text.pdf.PdfStamper(baseR, os, '\0',true); // An 
> stamper prepared for incremental changes
> 
>  com.lowagie.text.pdf.PdfWriter stamperImp 
> =update.getWriter(); // The corresponding writer of the appender
> 
> //XXX: Add new page?
> 
>  stamperImp.setPageEmpty(false);
>  stamperImp.newPage();
> 
> //Fetch the new page from the additions
>  com.lowagie.text.pdf.PdfReader reader2 = new 
> com.lowagie.text.pdf.PdfReader("additions.pdf");
>  com.lowagie.text.pdf.PdfImporte 
> dPage ipage= stamperImp.getImportedPage(reader2,1);
> 
> //XXX:Get the under layer to add the imprtedpage into the new 
> page in target? 
> // A getUnderContent(baseR.getNumberOfPages()+1) on the 
> PdfStamper itself will not help  as the  newPage is not 
> counted properly
> 
>  com.lowagie.text.pdf.PdfContentByte under = 
> stamperImp.getDirectContentUnder();
> 
> /*Add the page now this operation throws: 
> java.lang.NullPointerException        at 
> com.lowagie.text.pdf.PdfContentByte.addTemplate(PdfContentByte
> .java:1898)  under.addTemplate(ipage, 1, 0, 0, 1, 0, 0);*/
> 
> //commit the updates
>  update.close();
>  os.close();
> 
> Thanks again for your help in advance and best regards
> 


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