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https://issues.apache.org/jira/browse/PDFBOX-1101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Leleu resolved PDFBOX-1101.
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Resolution: Fixed
Fix Version/s: 1.7.0
Behaviour of the JavaCC parser is adapted to the PDF version.
In a PDF 1.4 (and lower), JavaCC expects a "trailer" and a "xref" key words.
In a PDF 1.5 (and higher), control is done in the Preflight code using PDFBox.
This issue fixes and other problem about StringLiteral in JavaCC
> Improve JavaCC Grammar and Preflight to manage Xref stream object
> -----------------------------------------------------------------
>
> Key: PDFBOX-1101
> URL: https://issues.apache.org/jira/browse/PDFBOX-1101
> Project: PDFBox
> Issue Type: Bug
> Components: Preflight
> Affects Versions: 1.7.0
> Reporter: Eric Leleu
> Assignee: Eric Leleu
> Fix For: 1.7.0
>
>
> Until PDF 1.4, keywords "xref" and "trailer" were mandatory at the end of
> the PDF File to know where object are located into the PDF Body.
> However, according to my understanding of the PDF Reference 1.5 and 1.7, this
> two entries can be referenced as object stream.
> Because of the PDF/A-1 specification is based on the PDF 1.4, our JavaCC
> parser check that the file contains trailer entries and extract these
> trailers to process some controls after Syntax Validation.
> TODO :
> - Check XRef and Trailer needs in the PDFReference 1.4 to 1.7
> - implement new XRef and Trailer managment rules in preflight.
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