Le 25/04/2017 à 18:43, Tilman Hausherr a écrit :
Am 25.04.2017 um 14:15 schrieb Olivier Cailloux:
Le 24/04/2017 à 20:10, Tilman Hausherr a écrit :
Am 24.04.2017 um 14:53 schrieb Olivier Cailloux:
Dear list,
How can I obtain, from a given PDDocument, a list of the page label
ranges that it contains?
Here is an example where I obtain the first PDPageLabelRange. How
to retrieve the other ones? I realize I can iterate over all pages
of the document and query for the possible existence of a
pageLabelRange at each page, but I suspect there must be a more
efficient (and simpler) way.
try (PDDocument document = PDDocument.load(…)) {
assert !document.isEncrypted();
PDDocumentCatalog catalog = document.getDocumentCatalog();
PDPageLabels labels = catalog.getPageLabels();
PDPageLabelRange pageLabelRange = labels.getPageLabelRange(0);
}
[accidentally mailed; repost for the list]
Do you need the range (which is a naming scheme) or do you need the
label?
Thanks for your reply. I need the ranges.
First one isn't available for some reason. There's a Map<Integer,
PDPageLabelRange> labels, but it is not available to the public.
Should I file a request for improving this situation somehow?
Olivier
I'm wondering whether it is really THAT important?
Certainly not extremely important. But still more elegant and nice to
have, me thinks. I suspect other users will wonder how to iterate over
the label ranges, as it seems a natural information to provide. (My two
cents.)
I'm not sure if I should expose the map; maybe return a list of pages
as a set? You could then iterate on that one to get the ranges.
A set of PDPageLabelRange in itself has low usefulness, as
PDPageLabelRange objects do not contain the corresponding page indexes.
I’d rather suggest providing a set of page indexes on which
PDPageLabelRange start. (Assuming you do not plan to change the rest of
the API.) This would fit well with the existing labels.getPageLabelRange
method. Or even better (IMHO), add the page index info to the
PDPageLabelRange object. I feel it belongs there.
Olivier
Tilman
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