Yes, OpenJump's Datastore interface and family only ask to the data plugin only data inside the viewable bounding box for a layer obtained through "Add Datastore". Also there's a cache mechanism built inside OpenJump, but I never investigated on how it exactly works.
On the contrary Datastore layers coming from a "Run Datastore Query" are read and stored inside OpenJump's memory only once, hence they're more similar to Layers coming from, for example, a Shapefile, that is Layers obtained from the "old" Datasource interface, I believe... Bye Paolo Rizzi > Hi, > > I believe that PostGIS "Add datastore" layer is somehow dynamic and takes the > bounding box into account when sending queries. Having Use cache box checked, > as it was in my case, obviously makes JUMP to cache all or part of the > previously fetched features. Martin Davis is perhaps the one who knows. > > -Jukka Rahkonen- > > Larry Becker wrote: > >> Is this evidence that Stefan's caching theory is correct? Does "Run >> datastore query" load into memory immediately and "Add datastore layer" >> somehow defer the load? > >> By the way, PostGIS datastores do result in an object type of Layer, so it >> is being processed as vectors. > >> I guess what is needed is a way in the software to detect a PostGIS >> DataStore Layer and process it separately as in: > >> if (layer instanceof SomethingNotSureWhat) >> >> regards, >> Larry > > On Mon, Nov 9, 2009 at 3:47 PM, Rahkonen Jukka > <jukka.rahko...@mmmtike.fi>wrote: > >> Hi, >> >> I managed to print data from PostGIS to layered pdf by using "Run datastore >> query" instead of "Add datastore layer". Pretty nice feature. >> >> -Jukka- >> >> >> Stefan Steiniger wrote: >> >>> I assume it is related to the caching? >>> stefan >>> Rahkonen Jukka wrote: >>>> Hi, >>>> I tried now - no effect at all. With PostGIS layers open in the task >> window, only the fence shows in the pdf file. >>>> -Jukka- >>> >>> Larry Becker wrote: >>> >>> Hmm. Perhaps PostGIS doesn't descend from Layer. There is no rendering >>> optimization for non-Layer data, so it might render like a raster. >>> >>> Did you try unchecking the "Change Line Width" check box? >>> >>> Larry >>> >>> On Mon, Nov 9, 2009 at 12:27 PM, Rahkonen Jukka >>> <jukka.rahko...@mmmtike.fi>wrote: >>> >>>> Hi, >>>> >>>> No problem in installing, running and creating layered pdf from demo >>>> shapefiles. However, it does not print by own vectors from PostGIS into >>>> pdf. Layers appear in the resulting file but linework is not visible. >> Is >>>> there some simple reason for this? >>>> >>>> -Jukka- >>>> >>>> >>>> Larry Becker wrote: >>>> >>>> You can download a prerelease copy here: >>>> >>>> http://www.ashsiii.com/downloads/SkyJUMP_12_104.EXE >>>> >>>> Larry >>>> >>>> On Sat, Nov 7, 2009 at 6:52 AM, Rahkonen Jukka < >> jukka.rahko...@mmmtike.fi >>>>> wrote: >>>>> Hi Larry, >>>>> >>>>> I would like to have a try. When do you plan to release a version >>>>> supporting layered PDF output? >>>>> >>>>> -Jukka- >>>>> >>>>> >>>>> >>>>> -----Alkuperäinen viesti----- >>>>> Lähettäjä: Larry Becker [mailto:becker.la...@gmail.com] >>>>> Lähetetty: pe 6.11.2009 17:32 >>>>> Vastaanottaja: OpenJump develop and use >>>>> Aihe: [JPP-Devel] SkyJUMP generating PDF directly with layers >>>>> >>>>> I just wanted to report that I have just added direct PDF generation >>>>> capability to SkyJUMP (committed but build unreleased). It supports >>>>> layers, >>>>> transparency, and high resolution images. See the link below for an >>>>> example. It uses the SkyJUMP print architecture and the iText >>>>> <http://www.lowagie.com/iText/>library. >>>>> >>>>> http://www.ashsiii.com/downloads/SkyJUMP.pdf >>>>> >>>>> regards, >>>>> Larry Becker >>>>> Integrated Systems Analysts, Inc. >>>>> >>>>> >>>>> >>>>> >> ------------------------------------------------------------------------------ >>>>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 >>>> 30-Day >>>>> trial. Simplify your report design, integration and deployment - and >>>> focus >>>>> on >>>>> what you do best, core application coding. Discover what's new with >>>>> Crystal Reports now. http://p.sf.net/sfu/bobj-july >>>>> _______________________________________________ >>>>> Jump-pilot-devel mailing list >>>>> Jump-pilot-devel@lists.sourceforge.net >>>>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >>>>> >>>> >>>> -- >>>> Larry Becker >>>> Integrated Systems Analysts, Inc. >>>> >>>> >>>> >>>> >> ------------------------------------------------------------------------------ >>>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 >> 30-Day >>>> trial. Simplify your report design, integration and deployment - and >> focus >>>> on >>>> what you do best, core application coding. Discover what's new with >>>> Crystal Reports now. http://p.sf.net/sfu/bobj-july >>>> _______________________________________________ >>>> Jump-pilot-devel mailing list >>>> Jump-pilot-devel@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >>>> >>> >>> >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >> trial. Simplify your report design, integration and deployment - and focus >> on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _______________________________________________ >> Jump-pilot-devel mailing list >> Jump-pilot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >> trial. Simplify your report design, integration and deployment - and focus >> on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _______________________________________________ >> Jump-pilot-devel mailing list >> Jump-pilot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> > > > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
