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https://issues.apache.org/jira/browse/PDFBOX-5815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17843776#comment-17843776
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Nicolò Rossi commented on PDFBOX-5815:
--------------------------------------
Sorry i didn't see it, thanks!
> Can't split the document into individual pages
> ----------------------------------------------
>
> Key: PDFBOX-5815
> URL: https://issues.apache.org/jira/browse/PDFBOX-5815
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 3.0.2 PDFBox
> Reporter: Nicolò Rossi
> Priority: Critical
> Labels: Links, java.lang.nullPointerException, link, split
> Attachments: CTU.pdf
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> If I try to split a document, containing links to internal pages, by single
> page, Splitter class throws {*}NPE{*}.
>
> This is our code:
>
> {code:java}
> PDDocument pdfDocument = Loader.loadPDF(new File("path/to/file.pdf"));
> List<PDDocument> splitted = splitter.split(pdfDocument); {code}
>
> This the exception:
>
> {code:java}
> java.lang.NullPointerException: Cannot invoke
> "org.apache.pdfbox.pdmodel.PDPage.getCOSObject()" because the return value of
> "org.apache.pdfbox.pdmodel.interactive.documentnavigation.destination.PDPageDestination.getPage()"
> is null
> at org.apache.pdfbox.multipdf.Splitter.fixDestinations(Splitter.java:153)
> at org.apache.pdfbox.multipdf.Splitter.split(Splitter.java:136){code}
>
> I search for the error and i see that it breaks in splitter class in
> +{color:#172b4d}_fixDestinations_{color}+ {color:#172b4d}method.{color}
>
> {color:#172b4d}I report here the method definition:{color}
> {code:java}
> private void fixDestinations(PDDocument destinationDocument)
> {
> PDPageTree pageTree = destinationDocument.getPages();
> for (PDPageDestination pageDestination : destToFixSet)
> {
> COSDictionary srcPageDict = pageDestination.getPage().getCOSObject();
> COSDictionary dstPageDict = pageDictMap.get(srcPageDict);
> PDPage dstPage = new PDPage(dstPageDict);
> // Find whether destination is inside or outside
> if (pageTree.indexOf(dstPage) >= 0)
> {
> pageDestination.setPage(dstPage);
> }
> else
> {
> pageDestination.setPage(null);
> }
> }
> } {code}
> h2. What's the problem:
> _+pageDestination.getPage()+_ returns null because the document contains
> links to internal pages, so splitting by page there is no more valid page to
> link in the result splitted document.
>
> h2. Possible solution:
> check the page returned and if null set +_pageDestination_+ to null, I could
> suggest something like this:
>
> {code:java}
> private void fixDestinations(PDDocument destinationDocument)
> {
> PDPageTree pageTree = destinationDocument.getPages();
> for (PDPageDestination pageDestination : destToFixSet)
> {
> PDPage srcPage = pageDestination.getPage();
> if (srcPage != null){
> COSDictionary srcPageDict = srcPage.getCOSObject();
> COSDictionary dstPageDict = pageDictMap.get(srcPageDict);
> PDPage dstPage = new PDPage(dstPageDict);
> // Find whether destination is inside or outside
> if (pageTree.indexOf(dstPage) >= 0)
> {
> pageDestination.setPage(dstPage);
> }
> else
> {
> pageDestination.setPage(null);
> }
> }
> else
> {
> pageDestination.setPage(null);
> }
> }
> } {code}
>
> I've attached example file, thanks.
>
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