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From "Rosalind Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4617) PDButton.setValue and PDButton.getOnValueForWidget cannot handle radios with duplicate names and choices
Date Mon, 05 Aug 2019 12:32:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16900048#comment-16900048

Rosalind Douglas commented on PDFBOX-4617:

[~tilman] and [~msahyoun] thanks for looking into this! Sorry I added to the confusion by
giving you a slightly different PDF than the error message I originally gave you. I was actually
experimenting with it the same time as writing up the ticket. I've updated the ticket to reflect
the choice values on the PDF and edited the PDF labels (Radio buttons with duplicate names
and choices-2019-08-05.pdf) to match with your findings.

You're on the right track: the problem is that you can't use the parsed choice values to set
the radio button state.



> PDButton.setValue and PDButton.getOnValueForWidget cannot handle radios with duplicate
names and choices
> --------------------------------------------------------------------------------------------------------
>                 Key: PDFBOX-4617
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4617
>             Project: PDFBox
>          Issue Type: Bug
>          Components: AcroForm
>    Affects Versions: 2.0.16
>            Reporter: Rosalind Douglas
>            Priority: Major
>         Attachments: Radio buttons with duplicate names and choices-2019-08-05.pdf, Radio
buttons with duplicate names and choices.pdf
> Hello, thank you for all of your efforts in building and maintaining PDFBox. We use it
extensively for parsing PDFs, programmatically setting values and flattening PDFs for print.
> BUG: When we parse the attached PDF, the onvalues for the radio buttons are 0, 1, 2,
3, 4, which are determined by PDButton.getOnValueForWidget. Later on, when we try to programmatically
set the value of the radio buttons (PDField.setValue) using the above onvalues, we receive
this error:
> {code:java}
> java.lang.IllegalArgumentException: value '4' is not a valid option for the field RadiosDuplicateExportValues,
valid values are: [0, Choice2] and Off
> at org.apache.pdfbox.pdmodel.interactive.form.PDButton.checkValue(PDButton.java:376)
> at org.apache.pdfbox.pdmodel.interactive.form.PDButton.setValue(PDButton.java:158) ~[pdfbox-2.0.16.jar:2.0.16]
> {code}
> The radio buttons all have the same name, with either "Choice2" or "0" as the choice
value. We would expect it to behave like Adobe DC, which allows the user to select any of
the buttons regardless of whether they have the same choice or not. I am on PDFBox 2.0.16.
> Though my example might seem trivial, it's very easy for our PDF creating users to do
this because copying and pasting fields is the easiest way to build a PDF.
> This might be a regression caused by PDFBOX-3391. In our code, we have overridden the
PDButton.setValue method so that it always invokes updateByValue(value) rather than sometimes
using updateByOption(value). Here is the code that works for us, from PDButton.setValue(String
> {code:java}
> @Override public void setValue(String value) throws IOException { 
> checkValue(value); 
> updateByValue(value); 
> applyChange(); }
> {code}
> One caveat is that the change would probably break your PDFBOX-3391 fix, but perhaps
there's some way to have them live side by side. I don't know very much about the other problem.
> Thanks again,
> Rosalind

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