Yeah I saw that. However my media filter will call some external programs to
process the bitstream files and then store these outside of dspace so I need
the files.
John
On 1/23/07, Mark Diggory <[EMAIL PROTECTED]> wrote:
John,
If you look at the org.dspace.app.mediafilter.MediaFilter Class, you'll
see underneath the hood, that what it passes around are "Bitstream" objects
which can be used to access the bitstream in the assetstore without actually
opening a stream against it.
Look at overriding the following method in MediaFilter, which is where it
is setup to be streamed to the actual concrete instance of this Abstract
parent class, instead you can write in your MediaFilter code which just
accesses the bitstream object the way you need.
/**
* processBitstream is a utility class that calls the above virtual
methods -
* it is unlikely that you will need to override it. It scans the
bitstreams
* in an item, and decides if a bitstream has already been filtered,
and if
* not or if overWrite is set, invokes the filter.
*
* @param c
* context
* @param item
* item containing bitstream to process
* @param source
* source bitstream to process
*
* @return true if new rendition is created, false if rendition
already
* exists and overWrite is not set
*/
public boolean processBitstream(Context c, Item item, Bitstream
source)
throws Exception
Hope you find this helpful,
-Mark
On Jan 23, 2007, at 7:41 AM, John Preston wrote:
Can anybody tell me how I can determine the file name of a bitstream as
stored in the assetstore path. I see that it appears to use the internal_id
from the bitstream table broken down into directories, but I don't know if
this is a reliable way to access the bitstream on disk. I need this so I
don't have to copy the bitstream to a temporary file to process it with a
media filter. The files I'm processing will be very large (maybe 100MB) so
if I can avoid copying, that would be good.
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Mark R. Diggory
~~~~~~~~~~~~~
DSpace Systems Manager
MIT Libraries, Systems and Technology Services
Massachusetts Institute of Technology
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