Hi, > Am 07.04.2018 um 15:01 schrieb Matthias Gall <matthias.g...@trimplement.com>: > > Dear all, > > I am trying to fetch the options available for a PDChoice field in a form but > get a ClassCastException from the PDFBox internals. > > The problematic PDF is an Inheritance Tax form from the UK's Revenue and > Customs, specifically I am currently looking at IHT405: > > > https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/697346/IHT405_online.pdf > > I use this code to iterate over the fields: > > PDDocument doc = PDDocument.load(resource.getFile()); > PDDocumentCatalog catalog = doc.getDocumentCatalog(); > PDAcroForm form = catalog.getAcroForm(); > for (PDField field : form.getFields()) { > if ("Ch".equals(field.getFieldType())) { > PDChoice choice = (PDChoice) field; > // All these variants fail with a ClassCastException: > choice.getOptions(); > choice.getOptionsDisplayValues(); > choice.getOptionsExportValues(); // internally just > delegates to getOptions() > } > } > > This is a stacktrace for e.g. the getOptionsExportValues() call: > > java.lang.ClassCastException: org.apache.pdfbox.cos.COSArray cannot be > cast to org.apache.pdfbox.cos.COSString > at > org.apache.pdfbox.pdmodel.common.COSArrayList.convertCOSStringCOSArrayToList(COSArrayList.java:367) > at > org.apache.pdfbox.pdmodel.interactive.form.FieldUtils.getPairableItems(FieldUtils.java:182) > at > org.apache.pdfbox.pdmodel.interactive.form.PDChoice.getOptions(PDChoice.java:91) > at > org.apache.pdfbox.pdmodel.interactive.form.PDChoice.getOptionsExportValues(PDChoice.java:210) > > The problem is that the expected "stringArray" also contains COSArrays with > value and label for the options: > > COSArray{[COSString{ }, COSArray{[COSString{Mr}, COSString{MR}]}, > COSArray{[COSString{Mrs}, COSString{MRS}]}, COSArray{[COSString{Miss}, > COSString{MISS}]}, COSArray{[COSString{Ms}, COSString{MS}]}]} >
this is a limitation in the current implementation which expects either an array fo strings or an array of arrays/pairs but not a mix. > This does not seem to be expected in FieldUtils.getPairableItems, which > introspects only the first item of the array and thus treats the array as an > array of strings. > > I found the bug with PDFBox 2.0.4 and upgraded to 2.0.9 which didn't help. > > Following the advised practices for bug reports I raise this on the mailing > list first. I appreciate your feedback on how to proceed. I've opened PDFBOX-4185 for that. Feel free to comment there and add yourself as a watcher. BR Maruan > > Kind regards > Matt > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org > For additional commands, e-mail: users-h...@pdfbox.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org For additional commands, e-mail: users-h...@pdfbox.apache.org
