Oliver Mannion created PDFBOX-4521:
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Summary: Missing Info value from file trailer:
org.apache.pdfbox.cos.COSName cannot be cast to
org.apache.pdfbox.cos.COSDictionary
Key: PDFBOX-4521
URL: https://issues.apache.org/jira/browse/PDFBOX-4521
Project: PDFBox
Issue Type: Bug
Components: Parsing
Affects Versions: 2.0.15
Reporter: Oliver Mannion
The following exception
{code:java}
Cause: java.lang.ClassCastException: org.apache.pdfbox.cos.COSName cannot be
cast to org.apache.pdfbox.cos.COSDictionary at
org.apache.pdfbox.pdmodel.PDDocument.getDocumentInformation(PDDocument.java:740)
at org.apache.tika.parser.pdf.PDFParser.extractMetadata(PDFParser.java:242) at
org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:154) at
org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at
org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at
org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:135){code}
is generated by PDF documents that have no value in the file trailer for the
{{Info}} key, eg:
{code:java}
<< /Size 50/Root 8 0 R/Info /ID >>
{code}
According to the [PDF
spec|[http://wwwimages.adobe.com/www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/pdf_reference_1-7.pdf]
the {{Info}} key is optional. PDFBox correctly handles the case when there is
no {{Info}} key and no value is present, but in this case, the key is present
but without a value.
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