Tilman Hausherr created PDFBOX-4003:
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Summary: 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
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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