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https://issues.apache.org/jira/browse/PDFBOX-4003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16735155#comment-16735155
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ASF subversion and git services commented on PDFBOX-4003:
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Commit 1850540 from Tilman Hausherr in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1850540 ]
PDFBOX-4003: get the whole tree map with the new convenience method when
testing (not relevant in results here because these are flat, but used by
myself to check the integrity of files prior to future tests)
> Can't retrieve number tree from structure tree
> ----------------------------------------------
>
> Key: PDFBOX-4003
> URL: https://issues.apache.org/jira/browse/PDFBOX-4003
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.8
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Major
> Labels: StructureTree
> Fix For: 2.0.14, 3.0.0 PDFBox
>
> Attachments: GeneralForbearance.pdf
>
>
> {code}
> PDDocument doc = PDDocument.load(new File("GeneralForbearance.pdf"));
> Object value =
> doc.getDocumentCatalog().getStructureTreeRoot().getParentTree().getValue(0);
> {code}
> The code above always fails when used on a PDF with a structure tree:
> {code}
> Exception in thread "main" java.io.IOException: Error while trying to create
> value in number
> tree:org.apache.pdfbox.cos.COSBase.<init>(org.apache.pdfbox.cos.COSArray)
> at
> org.apache.pdfbox.pdmodel.common.PDNumberTreeNode.convertCOSToPD(PDNumberTreeNode.java:212)
> at
> org.apache.pdfbox.pdmodel.common.PDNumberTreeNode.getNumbers(PDNumberTreeNode.java:185)
> at
> org.apache.pdfbox.pdmodel.common.PDNumberTreeNode.getValue(PDNumberTreeNode.java:139)
> at pdfboxpageimageextraction.MergeTest.main(MergeTest.java:29)
> Caused by: java.lang.NoSuchMethodException:
> org.apache.pdfbox.cos.COSBase.<init>(org.apache.pdfbox.cos.COSArray)
> at java.lang.Classj.getConstructor0(Class.java:3082)
> at java.lang.Class.getDeclaredConstructor(Class.java:2178)
> at
> org.apache.pdfbox.pdmodel.common.PDNumberTreeNode.convertCOSToPD(PDNumberTreeNode.java:206)
> ... 3 more
> {code}
> I suspect that it is related to the PDNumberTreeNode having been called with
> a {{COSBase}} class parameter in {{getParentTree()}}.
> That one doesn't have a constructor with a parameter.
> The structure tree numbers tree has mixed contents, these can be arrays or
> dictionaries.
> What we need is some PD wrapper that can have both inside.
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