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https://issues.apache.org/jira/browse/PDFBOX-3218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125494#comment-15125494
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Rees Byars edited comment on PDFBOX-3218 at 1/31/16 8:47 PM:
-------------------------------------------------------------
Attached patch file. This file fixes the field renaming when merging AcroForms,
while also optimizing a bit on the nextFieldNum calculation and adding the
ability in the PDFMergerUtility API to set the desired renaming prefix and to
turn off renaming altogether. Turning off the renaming was added in support of
PDFBOX-3111.
The patch also contains a simple unit test built on the above linked PDF files.
These files are probably too large to be ideal, but they are what I had on hand.
was (Author: rsby):
Attached patch file.
> PDFMergerUtility improperly merges AcroForms, causing some forms to break
> -------------------------------------------------------------------------
>
> Key: PDFBOX-3218
> URL: https://issues.apache.org/jira/browse/PDFBOX-3218
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.0
> Reporter: Rees Byars
> Attachments: PDFBOX-3218.patch
>
>
> In PDFMergerUtility.mergeAcroForm, adding a parent field to the destination
> fields automatically adds the children, but the code does not account for
> this. The result is that the same fields get added many times with different
> names. This is a silent error for most PDFs. However, for some forms, the
> resultant PDFs cause SOM expression errors in Adobe Reader.
> This problem can be reproduced by appending the following PDFs in the order
> listed:
> http://www.vba.va.gov/pubs/forms/VBA-21-4185-ARE.pdf
> http://www.vba.va.gov/pubs/forms/VBA-21-534EZ-ARE.pdf
> We were able to fix this issue for our purposes by forking the github mirror
> and altering the mergeAcroForm method to only append fields whose parent is
> null.
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