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https://issues.apache.org/jira/browse/PDFBOX-5877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17878963#comment-17878963
]
Andreas Lehmkühler commented on PDFBOX-5877:
--------------------------------------------
Maybe more important: don't use the input file as output. The on demand parser
may read from the input file until it is closed. Most likely your are
overwriting the source while saving the resulting file.
> After flattening a form pdf, the pdf loses content
> --------------------------------------------------
>
> Key: PDFBOX-5877
> URL: https://issues.apache.org/jira/browse/PDFBOX-5877
> Project: PDFBox
> Issue Type: Bug
> Components: AcroForm
> Affects Versions: 3.0.3 PDFBox
> Environment: Mac Ventura, java 18 PDFBox 3.0.3, Tomcat 9
> Linux; version: 5.15.0-105-generic, java 17, Tomcat 9.0.93
> Reporter: Joseph Jezerinac
> Priority: Major
> Attachments: beforeFalttening.pdf, flattenedPdf.pdf
>
>
> After flattening the pdf form content changes. Pls take a look at before and
> after pdf. The flattening works fine in 2.0.31. After upgrading to 3.0.3 we
> started getting many issues with pdf forms after flattening.
> The code that used for flattening is as follows
> {code}
> PDDocument pdDocument = Loader.loadPDF(file, “”);
> pdDocument.setResourceCache(new PdfResourceCache())
> try {
> boolean save = false;
> if (pdDocument.isEncrypted()) {
> pdDocument.setAllSecurityToBeRemoved(true);
> save = true;
> }
> final PDDocumentCatalog pdDocumentCatalog =
> pdDocument.getDocumentCatalog();
> if (pdDocumentCatalog != null) {
> final PDAcroForm pdForm = pdDocumentCatalog.getAcroForm();
> if (pdForm != null) {
> pdForm.flatten();
> save = true;
> }
> }
> if (save) {
> pdDocument.save(file);
> }
> }
> {code}
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