I encountered NullPointerExceptions when attempting to deal with some PDF files.
RandomAccessFile raFile = new RandomAccessFile(inPdfFile, "r");
COSDocument cosDocument = new COSDocument(raFile);
PDDocument document = new PDDocument(cosDocument);
int documentNumberOfPages = document.getNumberOfPages();
This results in:
java.lang.NullPointerException: null
at
org.apache.pdfbox.pdmodel.PDDocument.getDocumentCatalog(PDDocument.java:763)
~[pdfbox-1.8.7.jar:na]
at
org.apache.pdfbox.pdmodel.PDDocument.getNumberOfPages(PDDocument.java:1423)
~[pdfbox-1.8.7.jar:na]
at
com.pgac.jobs.mdr.agentsite.AgencySortHandler.handleSpoolFile(AgencySortHandler.java:891)
[AgencySortHandler.class:na]
PDDocument.java:763 is here:
762 COSDictionary trailer = document.getTrailer();
763 COSBase dictionary = trailer.getDictionaryObject( COSName.ROOT );
This does not work either:
PDDocumentCatalog documentCatalog = new PDDocumentCatalog(document);
List<PDPage> pdPageList = documentCatalog.getAllPages();
So apparently my PDF files are NON-conformant and have NULL for a Trailer.
Is there another way to get the number of pages in this case?
Also, rather than throw a NPE, wouldn't it be a good idea to throw an Exception
with a message indicating what is wrong with the input?
