On Tue, Sep 11, 2018 at 3:18 PM Olyster <gagnon_oliv...@outlook.com> wrote:
> Hi, > > I'm currently developing a feature. I'm modifying gt-jdbc-version.jar. > > I need to calculate the scale so I need the bbox (which I already have) and > the width queryString parameter. > > Is it available from classes in gt-jdbc ? If not, from which class/jar > should I propagate it ? > GeoServer makes the following variables available via the Env function, it was meant for SLD usage, but you can query them using EnvFunction pretty much from everywhere, including the JDBC stores: https://github.com/geoserver/geoserver/blob/6e9e25c0c7cdda9ada9f33f8255130d3afc76801/src/wms/src/main/java/org/geoserver/wms/RenderingVariables.java#L22 However, mind, if you are trying to support generalization, the renderer is already passing down a query hint to all JDBC stores that support it, providing the target resolution. PostGIS for example uses to run a in-database simplification of data before returning it to GeoTools, see this bit and search for other parts of the class with the "simplification" keyword: https://github.com/geotools/geotools/blob/1c6ec822352d00a4e6566a7e669ee501384932ae/modules/plugin/jdbc/jdbc-postgis/src/main/java/org/geotools/data/postgis/PostGISDialect.java#L1487 It is in general more useful because you get the simplifcation distance in the data native CRS, instead of the requested one (which can be different, in case of reprojection) Hope this helps Cheers Andrea == 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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