On Thu, Jun 30, 2011 at 3:54 AM, Michael Bedward <michael.bedw...@gmail.com> wrote: > On 30 June 2011 00:36, Jody Garnett <jody.garn...@gmail.com> wrote: >> Micheal I think we will need to mark selection lab as broken and open a bug >> report on this one; personally I would make a new Filter each time the >> selection changes (it is how I handle it in uDig). But that is just me ... > > Hi Jody, Sergey, > > I've been trying to follow this thread but must admit I'm lost. I'm > not familiar (= clueless) about the change to the way that styles are > handled, but if it means that filter functions can no longer be > created and used on the fly programmatically it seems that we've made > life harder for users (?).
Style cloning has been there for a while for a variety of reasons (dpi, uom, simplify), if a function is not registered in SPI it won't be cloneable, won't be usable from CQL, SLD and so on. The tutorial at http://docs.geotools.org/latest/userguide/tutorial/advanced/function.html is way overkill though, in order to add a function all one has to do is to create the function implementation and register it in META-INF/services/org.opengis.filter.expression.Function and GeoTools will pick it up and make it cloneable. Now, if the results of the function are not stable (calling it twice in a row with the same parameters does not lead to the same result) then it also has to implement the VolatileFunction marker interface, but there are very few functions that need to do that Cheers Andrea -- ------------------------------------------------------- Ing. Andrea Aime GeoSolutions S.A.S. Tech lead Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ------------------------------------------------------- ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
