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https://issues.apache.org/jira/browse/PDFBOX-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maruan Sahyoun resolved PDFBOX-4066.
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Resolution: Fixed
I'm resolving this as the bug itself has been resolved. For the enhancements to
merging AcroForms please see PDFBOX-3111.
[~mkl] [~joeeoj] I've added you as a watcher there. Thanks for your input.
> Merging documents with nested fields duplicates child fields
> ------------------------------------------------------------
>
> Key: PDFBOX-4066
> URL: https://issues.apache.org/jira/browse/PDFBOX-4066
> Project: PDFBox
> Issue Type: Bug
> Components: AcroForm, Utilities
> Affects Versions: 2.0.8
> Reporter: Al Phaba
> Assignee: Maruan Sahyoun
> Priority: Major
> Fix For: 2.0.9, 3.0.0 PDFBox
>
> Attachments: TestForm-flattened.pdf, TestForm-merged.pdf,
> TestForm.pdf, flattenAndMerge.pdf
>
>
> I have a pdf with a lot of acroforms, I do some manipulation on it which
> results in a new pdf. So I have PDF-1 (which is the original one )and PDF-2
> (just a duplication of PDF-1), now I want to merge them. Both PDFs have some
> acroforms for example: field_a, field_2...
> Before I merge them I flatten PDF-1, because I only want to have acrofields
> from PDF-2. When I check then my new merged PDF I can see that there are no
> visible fields on on the pages from PDF-1 and there are fields on pages of
> fields of PDF-2. At the first look it seems ok, but when I inspect the fields
> I can see that the merger has renamed all the fields for PDF-2 e.g.
> field_a_dummy123, field_b_dummy232 ...
> It seems to me, that flattening does not remove the fields and thats why the
> PDFMerger from PDFBox will rename the fields for PDF-2 because acrofields
> need to be unique.Another guess was that there is a bug in mergeAcroForm()
>
> {code:java}
> @Test
> public void flattenAndMerge() throws IOException {
> File testForm = new
> File(classLoader.getResource("./TestForm.pdf").getFile());
> byte[] testFormAsByte = Files.readAllBytes(testForm.toPath());
> byte[] testFormAsByte2 = Files.readAllBytes(testForm.toPath());
> PDDocument pdf1 = PDDocument.load(testFormAsByte);
> PDAcroForm acroform = pdf1.getDocumentCatalog().getAcroForm();
> acroform.flatten();
> Path flattendedPdf = Files.createTempFile("flatten", ".pdf");
> pdf1.save(flattendedPdf.toFile());
> PDFMergerUtility merger = new PDFMergerUtility();
> merger.addSource(new
> ByteArrayInputStream(Files.readAllBytes(flattendedPdf)));
> merger.addSource(new ByteArrayInputStream(testFormAsByte2));
> merger.setDestinationFileName("./build/flattenAndMerge.pdf");
> merger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
> }
> {code}
> Here is my SO Article
> [https://stackoverflow.com/questions/48271924/pdfbox-flatten-pdf-does-not-remove-acroform-elements?noredirect=1#comment83544858_48271924]
>
>
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