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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PDFBOX-4003) Can't retrieve number tree from structure tree
Date Sun, 30 Dec 2018 20:04:00 GMT

     [ https://issues.apache.org/jira/browse/PDFBOX-4003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tilman Hausherr updated PDFBOX-4003:
------------------------------------
    Fix Version/s: 3.0.0 PDFBox
                   2.0.14

> 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
>            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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