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https://issues.apache.org/jira/browse/PDFBOX-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250653#comment-15250653
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Alexander Kriegisch commented on PDFBOX-3323:
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Well, you are the developer and without looking into your code I just want to
answer salomonically with a general statement: When and where you set the
properties depends on what is most efficient with regard to not having to
re-read or re-write the document in memory. So if the properties have to be at
the beginning maybe you want to write them early, if they are at the end, you
want to write them later in the process. You also have to make sure that they
do not get overwritten somehow later during the merge process.
I am not sure this statement helps, I really do not want to interfere with your
technical design decisions, not knowing enough about the inner workings of
PdfBox or the structure of PDFs. For me both basically are black boxes.
> Cannot set destination meta data in PDFMergerUtility
> ----------------------------------------------------
>
> Key: PDFBOX-3323
> URL: https://issues.apache.org/jira/browse/PDFBOX-3323
> Project: PDFBox
> Issue Type: Improvement
> Affects Versions: 1.8.9, 2.0.0
> Reporter: Alexander Kriegisch
> Labels: merge, metadata
>
> When merging multiple PDFs into one compound document via
> {{PDFMergerUtility}}, meta data like title, author, subject cannot be set but
> seem to be taken from one of the input documents. This is usually not the
> desired behaviour because as a user I have no direct influence on the meta
> data. As a user I would like to explicitly set or at least overwrite certain
> meta data for the destination document. Currently I can only set the
> destination stream or file name, but not the meta data.
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