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https://issues.apache.org/jira/browse/PDFBOX-5278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17411929#comment-17411929
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Michael Klink commented on PDFBOX-5278:
---------------------------------------
Maybe some page has an annotation array which (incorrectly!) directly
references a page object. In that case PDFBox would "fix" the type entry of the
page dictionary to be *Annot*. (Maybe the {{PDAnnotation(COSDictionary)}}
constructor should only set the type if it is not set, and otherwise check the
value and throw an exception if it's not *Annot* - or ignore this in a
non-strict mode.)
But maybe there is a different error in the PDF. Hard to tell without the PDF.
> PDPage.getAnnotations() causes subsequent calls to PDDocument.getPages() to
> fail
> --------------------------------------------------------------------------------
>
> Key: PDFBOX-5278
> URL: https://issues.apache.org/jira/browse/PDFBOX-5278
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 2.0.24
> Reporter: Alistair Oldfield
> Priority: Major
>
> I have stumbled across a strange issue with a certain PDF where
> PDPage.getAnnotations() causes subsequent calls to PDDocument.getPages() to
> fail.
>
> I am not at liberty to share the PDF publicly, but am happy to DM the PDF
> privately if it helps.
>
> The code to reproduce is pretty straightforward:
>
>
> {code:java}
> import java.io.File;
> import org.apache.pdfbox.pdmodel.PDDocument;
> import org.apache.pdfbox.pdmodel.PDPage;
> public class AnnotationsTest {
>
> public static void main(String[] args) throws Exception {
>
>
> try( PDDocument doc = PDDocument.load(new File(args[0]));){
> for (PDPage page : doc.getPages()) {
> //this line will cause the doc to not be
> re-iterable in the next block, commenting it out will allow it to pass.
> page.getAnnotations();
> }
>
> System.out.println("We get here, no problem - not sure
> why we can't re-iterate again...");
>
> //doc.getPages() fails.
> for (PDPage page : doc.getPages()) {
> //do something
>
> }
> }
> }
> {code}
> The Exception:
>
> Exception in thread "main" java.lang.IllegalStateException: Expected 'Page'
> but found COSName\{Annot}Exception in thread "main"
> java.lang.IllegalStateException: Expected 'Page' but found COSName\{Annot} at
> org.apache.pdfbox.pdmodel.PDPageTree.sanitizeType(PDPageTree.java:266) at
> org.apache.pdfbox.pdmodel.PDPageTree.access$400(PDPageTree.java:43) at
> org.apache.pdfbox.pdmodel.PDPageTree$PageIterator.next(PDPageTree.java:224)
> at
> org.apache.pdfbox.pdmodel.PDPageTree$PageIterator.next(PDPageTree.java:172)
> at AnnotationsTest.main(AnnotationsTest.java:28)
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