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https://issues.apache.org/jira/browse/PDFBOX-1599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13659708#comment-13659708
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Andreas Lehmkühler commented on PDFBOX-1599:
--------------------------------------------
Can you provide us with a sample pdf?
> ConvertToImage gets ClassCastException with Checkboxes in PDFForm
> -----------------------------------------------------------------
>
> Key: PDFBOX-1599
> URL: https://issues.apache.org/jira/browse/PDFBOX-1599
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.8.1
> Environment: Windows Vista, Java 1.6
> Reporter: Jens Vogt
> Priority: Critical
> Labels: patch
>
> 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
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