[PDFBOX-3777] org.apache.pdfbox.cos.COSDictionary cannot be cast to org.apache.pdfbox.cos.COSArray

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.5
• Fix Version/s: 2.0.22, 3.0.0 PDFBox
• Component/s: AcroForm
• Assignee: Unassigned
• Reporter: John Liston
• Created: 03/May/17 17:36
• Updated: 20/Mar/21 09:27
• Resolved: 20/Mar/21 09:27

Description

    public static void main(String[] args) throws IOException
    {
        PDDocument.load(new File("D1790B.pdf")).getDocumentCatalog().getAcroForm().getFields();
    }

throws

Exception in thread "main" java.lang.ClassCastException: org.apache.pdfbox.cos.COSDictionary cannot be cast to org.apache.pdfbox.cos.COSArray
	at org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm.getFields(PDAcroForm.java:368)
	at pdfboxpageimageextraction.PDFBOX3777.main(PDFBOX3777.java:20)

msahyoun wrote in the mailing list

the field definition in the AcroForm is wrong as the field root is defined as a dictionary and not as an array as it's required by the PDF spec.
...
I think we should fix that as Adobe Reader and another viewer I tested can open the form just fine. So we should do the same.