Thanks Andrea, this is the kind of additional advice I am looking for. So far,
to me converting my object to a SimpleFeature actually doesn’t look as daunting
as creating my own PropertyAccessor, although I don’t think I would have too
much trouble with the latter either. However, at the moment, creating my own
PropertyAccessor doesn’t look to be the shortest path to getting something
working which is what converting to a SimpleFeature has done for me. I am just
trying to verify an overall design approach and this is just one of the many
details I need to work out.
If I hit a snag with using SimpleFeature then I will definitely be looking at
other options,
Thanks,
--Steve
From: andrea.a...@gmail.com [mailto:andrea.a...@gmail.com] On Behalf Of Andrea
Aime
Sent: Sunday, March 15, 2015 12:19 PM
To: Stephen Brooke
Cc: Jim Hughes; geotools-gt2-users@lists.sourceforge.net
Subject: Re: [Geotools-gt2-users] CQL Parsing and Filtering with GeoTools
On Sun, Mar 15, 2015 at 8:06 PM, Stephen Brooke
<sbro...@mdacorporation.com<mailto:sbro...@mdacorporation.com>> wrote:
Any further thoughts you may have on this are much appreciated,
Here is another option to consider.
CQL parses to Filter, which in turn evaluates an Object, not a Feature.
So how do we evaluate properies against a random object? Using property
accessors,
which can be registered in SPI:
http://docs.geotools.org/latest/javadocs/org/geotools/filter/expression/PropertyAccessor.html
So you could write your own property accessor that knows how to extract the
properties out of
your objects, instead of converting them to simple features.
I don't think we have docs on how to write an accessor (this is kind of
advanced stuff, Jody please
correct me if I'm wrong) but have a look at PropertyAccessor sublasses with
your IDE, and see how they are getting
registered in SPI checking the META-INF/services directory in the same geotools
module
Cheers
Andrea
--
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.
==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i
file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo
è consentito esclusivamente al destinatario del messaggio, per le finalità
indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne
il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di
procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro
sistema. Conservare il messaggio stesso, divulgarlo anche in parte,
distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse,
costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for the
attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act (Legislative
Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in
accord with its purpose, any disclosure, reproduction, copying, distribution,
or either dissemination, either whole or partial, is strictly forbidden except
previous formal approval of the named addressee(s). If you are not the intended
recipient, please contact immediately the sender by telephone, fax or e-mail
and delete the information in this message that has been received in error. The
sender does not give any warranty or accept liability as the content, accuracy
or completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of e-mail
transmission, viruses, etc.
-------------------------------------------------------
------------------------------------------------------------------------------
Dive into the World of Parallel Programming The Go Parallel Website, sponsored
by Intel and developed in partnership with Slashdot Media, is your hub for all
things parallel software development, from weekly thought leadership blogs to
news, videos, case studies, tutorials and more. Take a look and join the
conversation now. http://goparallel.sourceforge.net/
_______________________________________________
GeoTools-GT2-Users mailing list
GeoTools-GT2-Users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
