Hello Chris and Joe
Le 15/12/12 14:14, Mattmann, Chris A (388J) a écrit :
Could you point Joe and I at the GeoTK stuff that you're porting? Anything
I could help port?
Thanks for the proposal :-). I started to port the code in this package:
https://builds.apache.org/job/sis-jdk7/site/apidocs/org/apache/sis/geometry/package-summary.html
I think there is good chances that I finish GeneralEnvelope by Monday.
As for the dependency from Tika to SIS, actually there is a choice. The
GeneralEnvelope to be committed is an implementation of the following
interface, which is derived from ISO 19107:
http://www.geoapi.org/snapshot/javadoc/org/opengis/geometry/Envelope.html
Ideally, I think that Tika should use only the Envelope interface as
much as possible and avoid direct dependency to SIS. The Envelope
interface is available through this Maven artifact:
<dependency>
<groupId>org.opengis</groupId>
<artifactId>geoapi</artifactId>
<version>3.0.0</version>
</dependency>
At some point, an implementation of this interface is needed, but
hopefully could be localized in only a small part of the code, in order
to keep Tika easy to port to different GeoAPI implementations. For the
implementation, there is two possibilities. Tika could depends on SIS
with this Maven artefact:
<dependency>
<groupId>org.apache.sis</groupId>
<artifactId>sis-referencing</artifactId>
<version>0.2-SNAPSHOT</version>
</dependency>
(Note: I suggest to use the trunk, not the JDK6 or JDK7 branch, because
the trunk is nailed down on the official GeoAPI release while the
branches are developed on top of milestones). However the Apache SIS
referencing module is likely to become a 1 Mb dependency in a few
months. Whether this is desirable or not for Tika depends on whether
advanced services like map projections and connection to the EPSG
database are useful to Tika or not.
If Tika needs only an Envelope implementation and a few other simple
classes, then sis-referencing may be an overkill. In such case, Tika
could instead bundles its own Envelope implementation. There is some
simple GeoAPI implementation available in the public domain here (so
anyone can put a copy under Apache license):
http://www.geoapi.org/geoapi-examples/apidocs/index.html
I just realized that a SimpleEnvelope is missing in the above examples,
but I could easily add one in the next few days (since I will be on SIS
envelopes anyway).
Martin
