gpstools

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Hi Matt,
I don't know a general-purpose Java-wrapper for libexiv2. However, if you
just want to *read* metadata you can also use an all-Java framework, such
as Apache Sanselan (not quite mature yet), or MetadataExtractor (no XMP
support). Getting xmp out of an image is rather easy since it is
character-based. A quick and not-so-terribly-dirty implementation would
just look for the xmpmeta tags and extract everything in between.
Afterwards you can process the XMP with your favourite XML API (SAX, DOM,
JDOM, XPath, ...). If you just want to process JPEGs you can also use the
XMP extraction code from gpsdings. Have a look at
net.sourceforge.gpstools.xmp.XMPJpeg. You can probably (I think you can but
I haven't checked) use the net.sourceforge.gpstools.xmp and
net.sourceforge.gpstools.jpeg packages without the rest of gpsdings.
Regards,
Moritz

Sorry, after reading more on exifloc, I now understand it to be a tool for
a particular purpose - to write to the image file.
I guess what I was looking for was a general purpose JNI wrapper to
libexiv2 so that I can use the 'print' (and other) functionality from
java.
If you know where I can find a JNI wrapper for libexiv2 can you please let
me know? thanks
(If I knew C++ I would try and do it.)