[jira] [Closed] (PDFBOX-2810) Indirect object marked as direct by PDFParser

["Andreas Lehmkühler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-2810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andreas Lehmkühler closed PDFBOX-2810.
--------------------------------------
    Resolution: Won't Fix

We won't fix this for the 1.8.x branch.

I'm pretty sure that this issue is solved at least in the trunk version 3.0, but without a sample pdf it is hard to reproduce.

Closed as "Won't Fix"


> Indirect object marked as direct by PDFParser
> ---------------------------------------------
>
>                 Key: PDFBOX-2810
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2810
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>    Affects Versions: 1.8.9
>            Reporter: Petras
>            Assignee: Andreas Lehmkühler
>            Priority: Major
>
> I've noticed an issue with PDFParser, which marks COSObject of indirect reference to COSDictionary as "direct", while dereferenced object (COSDictionary) correctly indicate the indirect state.
> Consider this extract from PDF:
> {code}
> 1 0 obj
> <<
>  /Type /Catalog
>  /Outlines 2 0 R
>  /Pages 3 0 R
> >>
> endobj
> 2 0 obj
> <<
>  /Type /Outlines
>  /Count 0
> >>
> endobj
> 3 0 obj
> <<
>  /Type /Pages
>  /Kids [4 0 R]
>  /Count 1
> >>
> endobj
> 4 0 obj
> <<
>  /Type /Page
> ...
> >>
> endobj
> {code}
> Reading catalog dictionary entry "{{/Outlines 2 0 R}}":
> {code}
> final COSDictionary cosCatalog = catalog.getCOSDictionary();
> // WORKS with dereferencing
> final COSBase dictOutlines = cosCatalog.getDictionaryObject(COSName.OUTLINES);
> Assert.assertFalse("Expected /Outlines indirect", dictOutlines.isDirect());
> {code}
> {color:red} FAILS without dereferencing{color}
> {code}
> Assert.assertFalse("Expected /Outlines indirect", cosCatalog.getItem(COSName.OUTLINES).isDirect());
> {code}
> The culprit is code in {{org.apache.pdfbox.pdfparser.BaseParser#parseCOSDictionary}}, which always set COSObject containing COSDictionary as "direct".
> Also noticed, that when indirect COSObject is member of COSArray, its "direct" state is not changed to direct. This code works while reading array element with of without dereferencing:
> {code}
> // /Pages 3 0 R
> final COSDictionary dictPages = (COSDictionary) cosCatalog.getDictionaryObject(COSName.PAGES);
> // /Kids [4 0 R]
> final COSBase objKids = dictPages.getDictionaryObject(COSName.KIDS);
> // WORKS without dereference
> COSBase firsElement = ((COSArray) objKids).get(0);
> Assert.assertFalse("Expected /Kids array element is indirect object", firsElement.isDirect());
> // WORKS with dereference
> firsElement = ((COSArray) objKids).getObject(0);
> Assert.assertFalse("Expected /Kids array element is indirect object", firsElement.isDirect());
> {code}



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