[PDFBOX-4814] Wrong COSType for OCProperties after merge

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.19
• Fix Version/s: 2.0.20, 3.0.0 PDFBox
• Component/s: PDModel
• Assignee: Tilman Hausherr
• Reporter: Andreas Küllinger
• Created: 16/Apr/20 10:58
• Updated: 15/Jun/20 04:54
• Resolved: 16/Apr/20 15:03

Description

If you merge a PDF document with OCProperties to a PDF document without OCProperties, the result of the merge is that the OCProperties type is no longer a COSDictionary but a COSObject. If a third document with OCProperties is merged with the previously created merge result, this leads to the following ClassCastException:

org.apache.pdfbox.cos.COSObject cannot be cast to org.apache.pdfbox.cos.COSDictionary at org.apache.pdfbox.multipdf.PDFCloneUtility.cloneMerge(PDFCloneUtility.java:227) at org.apache.pdfbox.multipdf.PDFCloneUtility.cloneMerge(PDFCloneUtility.java:229) at org.apache.pdfbox.multipdf.PDFMergerUtility.appendDocument(PDFMergerUtility.java:730) at pdfboxtest.Test.main(Test.java:38)

According to PDF Specification, OCProperties is always a dictionary.