[PDFBOX-1599] ConvertToImage gets ClassCastException with Checkboxes in PDFForm

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.8.1
• Fix Version/s: 1.8.2
• Component/s: PDModel
• Labels: patch
• Environment: Windows Vista, Java 1.6
• Assignee: Andreas Lehmkühler
• Reporter: Jens Vogt
• Created: 16/May/13 08:33
• Updated: 02/Jun/13 13:35
• Resolved: 23/May/13 17:10

Description

When creating an image from a PDF Form we get an CastCastException in:
Exception in thread "main" java.lang.ClassCastException: org.apache.pdfbox.cos.COSName cannot be cast to org.apache.pdfbox.cos.COSStream
at org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceDictionary.getNormalAppearance(PDAppearanceDictionary.java:103)
at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:140)
at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:781)
at org.apache.pdfbox.examples.util.Extraction$BarcodeLocator.getBarcode(Extraction.java:418)
at org.apache.pdfbox.examples.util.Extraction$BarcodeLocator.access$000(Extraction.java:379)
at org.apache.pdfbox.examples.util.Extraction.<init>(Extraction.java:103)
at org.apache.pdfbox.examples.util.Extraction.main(Extraction.java:138)

An further analysis shows that it seems to be related to checkboxes on the PDF Form. I fixed it temporarily using:

try

{ COSStream as = (COSStream)map.getDictionaryObject( asName ); actuals.put( asName.getName(), new PDAppearanceStream( as ) ); }

catch (ClassCastException ex)

{ System.err.println("Exception name: " + asName.getName()); }

in PDAppearanceDictionary.java.

Best regards
Jens