Hi Jim, for a long time I wanted to utilize the TransformDataStore to power renaming and retyping in GeoServer. I was hoping to get that through configuration in the layer page, making the attribute details table editable... and that's why it never happened in the end, changing the UI and the associated config is not trivial (once you have that, setting up the transformation in the ResourcePool is easy).
As far as I can tell, the datastore allows to transform one feature type, with some text based definitions. It will keep some attributes un-modified, and allow to add new computed/renamed ones at the end (or if one goes for specifying only transformations, get full control of order too, as one could add "att=att" "transformations" keeping a certain attribute un-modified, but in the desired position). The approach you're going towards makes it easier to get it going, it's probably time to allow "better" to go forward in face of a "best" that does not want to come :-D Go for it. Cheers Andrea On Tue, Nov 3, 2020 at 7:20 PM Jim Hughes <jhug...@ccri.com> wrote: > Hi all, > > At various times, Jody and I have chatted about having a "CQL View" in > GeoServer (or something similar akin to the SQL Views) that'd leverage > the Transform module and allow one to add columns to a FeatureSource > based on expressions. Such expressions could use existing or custom CQL > functions and that'd open a world of possibilities. > > Last week, I asked Jody about this idea again and he indicated that one > would really just need to write a DataStoreFactory. I banged out an > initial implementation as a starting place for the conversation. This > implementation provides a way to project down to a subset of attributes > as well as add new columns/attributes to a FeatureStore. > > If folks like it as-is, I'd be happy to add unit tests, and > documentation wherever we see fit. Thanks in advance for some feedback > on this idea! > > https://github.com/geotools/geotools/pull/3196/files > > Cheers, > > Jim > > > > _______________________________________________ > GeoTools-Devel mailing list > GeoTools-Devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geotools-devel > -- Regards, Andrea Aime == GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it ------------------------------------------------------- *Con riferimento alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se potesse darmene notizia. This email is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. We remind that - as provided by European Regulation 2016/679 “GDPR” - copying, dissemination or use of this e-mail or the information herein by anyone other than the intended recipient is prohibited. If you have received this email by mistake, please notify us immediately by telephone or e-mail.*
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