Nicolò Rossi created PDFBOX-5815:
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Summary: 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
Fix For: 3.0.3 PDFBox
Attachments: CTU.pdf
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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