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https://issues.apache.org/jira/browse/PDFBOX-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam Nichols updated PDFBOX-493:
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Attachment: COSArrayList.diff
PDDocument.diff
These two files enable users of PDFBox to get a page number based on the page's
object ID.
> Ability to get page number for bookmarks
> ----------------------------------------
>
> Key: PDFBOX-493
> URL: https://issues.apache.org/jira/browse/PDFBOX-493
> Project: PDFBox
> Issue Type: New Feature
> Components: PDModel
> Reporter: Adam Nichols
> Priority: Minor
> Fix For: 0.8.0-incubator
>
> Attachments: COSArrayList.diff, PDDocument.diff
>
>
> Bookmarks are handled as references (object number and generation number) to
> page objects. Currently, it's not too difficult to get the reference to the
> page ID, and the page is quickly accessible. The problem is that we don't
> know what page number that is, which is a problem in some cases. For example
> if one wanted to split the document based on bookmarks, they would need to
> know how many pages to make each document.
> To solve this in the most efficient manner possible, I feel a Map is in order
> which will store page numbers using object IDs as the keys. This map will be
> loaded once and then can be quickly referenced many times. For the time
> being, the call to generatePageMap() will not happen when a PDF is loaded
> (it'll have to be called explicitly). If people find this very useful and
> not too costly (memory/CPU) it can be moved into the load function so users
> can access it automatically.
> I'll attach the code I've written to do this soon (as soon as I figure out
> how to do so).
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