Howdy all,
I need to take an existing pdf document and change the title. Since this will be
used dynamically on a website, some of the pdfs will have forms and some won't.
Some will have restrictions (no printing, no saving, etc.) that I need to
preserve and some won't.
I can create a new pdf based on the original using PdfCopy and that allows me to
set the title the way I want. But the process doesn't seem to automatically
preserve any additional metadata like author, subject and keywords. It doesn't
preserve permissions like printing/saving/etc. and it doesn't seem to preserve
tags. When used on a PDF with a form in it, the form is no longer usable as a
form (almost as if it got flattened). List below is basically what I'm currently
doing (without any error handling).
Is there a better way to do this? Such that I can basically create an IDENTICAL
pdf where the only thing different is the title? Any advice would be greatly
appreciated.
---snip---
PdfReader reader = new PdfReader("/mypath/original.pdf");
OutputStream out = new BufferedOutputStream(new
FileOutputStream("/mypath/mycopy.pdf"));
Document doc = new Document(reader.getPageSizeWithRotation(1));
PdfCopy copy = new PdfCopy(doc, out);
copy.setEncryption(null, null, permissions, reader.getPermissions());
HashMap infoDict = reader.getInfo();
if (infoDict.containsKey("Author"))
{
doc.addAuthor(infoDict.get("Author").toString());
}
if (infoDict.containsKey("Subject"))
{
doc.addSubject(infoDict.get("Subject").toString());
}
if (infoDict.containsKey("Keywords"))
{
doc.addKeywords(infoDict.get("Keywords").toString());
}
doc.addTitle("Testing Title");
doc.open();
int pageCount = reader.getNumberOfPages();
for (int pageIdx = 1; pageIdx <= pageCount; pageIdx++)
{
PdfImportedPage page = copy.getImportedPage(reader, pageIdx);
copy.addPage(page);
}
doc.close();
---snip---
-Sean
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