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https://issues.apache.org/jira/browse/PDFBOX-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16182736#comment-16182736
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Tilman Hausherr commented on PDFBOX-3809:
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We could get a list of all widgets from the field list, and check for equality
at the COS level for each PDAnnotationWidget.
The "only" problem that remains is removing a field. There's currently no way
to remove a single field from the tree.
But I think this can be done recursively by going through the tree:
- on the array level, check the terminal fields if there's a match at the COS
level
- if yes, then delete field from COSArray and report success
- if no, then for each non terminal field, get the kids array and do as
described.
This won't be done for the next release (it could, but this would be risky),
but I think it can be done.
Alternative: we do nothing and make the method private
> PDAcroForm.flatten(PDField list, refreshAppearances boolean) flattens all
> form fields instead of specified ones.
> ----------------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-3809
> URL: https://issues.apache.org/jira/browse/PDFBOX-3809
> Project: PDFBox
> Issue Type: Improvement
> Components: AcroForm
> Affects Versions: 2.0.5, 2.0.6, 2.0.7
> Reporter: Cristin Donaher
> Priority: Minor
>
> Thanks for the excellent PDF library. For my use case I need to flatten a
> subset of the AcroForm fields. I was attempting to use the
> PDAcroForm.flatten call, passing in my field list. However, after the method
> is called, all the fields are gone.
> The method itself appears to remove all PDFAnnotationWidgets from each page
> and at the end clears the acroform's field set.
> Is the javadoc description (This will flatten the specified form fields.)
> just misleading? Could a flatten call for a subset of fields be added?
> Thanks
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