Hi Peter
Thanks for the clarification and the find original method; I already had
code to carry out a similar function and have modified it to more
closely match the DSpace functionality.
My assumption was that a bundle would encompass all variations of an
asset; original, thumb, preview, but perhaps my understanding of what a
bundle actually represents is wrong.
Thanks again
Hayden
On 07/06/11 03:21, Peter Dietz wrote:
Hi Hayden,
There is a simple method where you can ask a THUMBNAIL bundle
bitstream for the ORIGINAL bitstream that it is related to.
Bitstream findOriginalBitstream(Item item, Bitstream derived)
Its good that there is a simple method to call, however, its
implementation reveals how fragile the relationship between bitstreams is.
dspace-api:
https://github.com/DSpace/DSpace/blob/master/dspace-api/src/main/java/org/dspace/content/packager/AbstractMETSDisseminator.java#L1259
Additionally it is replicated in XMLUI:
https://github.com/DSpace/DSpace/blob/master/dspace-xmlui/dspace-xmlui-api/src/main/java/org/dspace/app/xmlui/objectmanager/ItemAdapter.java#L925
Thus, to relate between the ORIGINAL full sized bitstream "paris.jpg"
and the derived THUMBNAIL bitstream "paris.jpg.jpg", there's no
bitstream-group or intelligent parent/child relationship going on
other than the filenames being similar. In the implementation of the
findOriginal method, the filenames are identical except for the final
four characters, which could be ".png", ".jpg", ".txt".
Peter Dietz
On Fri, Jun 3, 2011 at 10:15 AM, Hayden Young <haydenyo...@wijiti.com
<mailto:haydenyo...@wijiti.com>> wrote:
I have a script which displays an item and its associated bitstreams.
What I would like to do is only list the originals with thumbnails
displayed next to image originals. Additionally each original
would have
a preview link so that branded previews could be viewed where
available.
Using /items/{id}.json returns an item, its bitstreams and bundles but
looking at the output I cannot see how to associate an original
with its
thumbnail and preview. While this isn't a problem with an item
that has
one PNG bitstream it becomes impossible to associate a thumbnail and
preview when there are multiple assets.
Therefore, how do I associate an original with its thumbnail and
preview?
Cheers
Hayden
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not the intended recipient please contact the sender as soon as possible by
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